On most subdivisions and a lot of multi-unit sites, the civil engineer decides how much dirt moves, where the water goes, and how wide the road has to be. Those three answers set a large share of the construction budget, and they are usually locked in long before a contractor prices anything. Yet the civil engineer is often the last consultant engaged and the one briefed most loosely, which is how developers end up discovering at detailed design that the site has no gravity discharge point, or that the council wants a 6 metre pavement where the feasibility assumed 4.5 metres.
This guide looks at civil engineering the way a developer needs to: what the discipline actually produces, which statutory approval each drawing set feeds in each state, who is legally allowed to sign it, what the work tends to cost, and the points on the programme where civil work becomes the critical path. Rules, registration dates and standards referenced here were current at the time of writing and do change, so the linked primary source is the place to confirm anything you intend to rely on.
What does a civil engineer do on a subdivision or multi-unit site?
A civil engineer on a development project designs everything between the natural ground surface and the finished lot: the earthworks, the drainage, the roads and access, the sediment controls, and the corridors that carry services. On a greenfield subdivision that can be the majority of the physical works. On an infill multi-unit site it may be a much smaller package, but the pieces that remain, particularly stormwater and driveway design, still tend to sit on the critical path.
The work generally splits into five workstreams.
Earthworks, levels and site regrading
The civil engineer sets the finished surface levels: pad levels for each lot, road levels, batter slopes, retaining wall locations and heights, and the cut and fill balance across the site. This is where the money hides. A design that balances cut and fill on site avoids importing or exporting material, and haulage is one of the most volatile costs on a civil job. A design that leaves a 5,000 cubic metre surplus can add a six-figure line item that never appeared in the feasibility.
Levels also interact with everything else. Pad levels determine whether each lot can drain to the street or needs an interallotment drainage easement. They determine retaining wall heights, which drive both cost and, on some sites, planning issues with neighbours. They determine driveway grades. A civil concept that is done properly at the start of design tends to be worth far more than a cheap one done at the end.
Stormwater quantity, quality and flooding
Stormwater is usually the largest technical component and the one most likely to generate conditions of consent. It typically covers three separate questions.
Quantity is the hydraulic question: how much water arrives, how much leaves, and whether the development has to detain the difference. Most councils require post-development discharge to be held at or below pre-development levels for a range of storm events, which usually means on-site detention tanks or basins. Design flood estimation across Australia is generally carried out to Australian Rainfall and Runoff, the national design flood guideline maintained by Geoscience Australia, in the edition the council nominates.
Quality is the environmental question: what the runoff carries and how much of it has to be removed before it leaves the site. Councils commonly set pollutant reduction targets for total suspended solids, total phosphorus, total nitrogen and gross pollutants, which are usually met through a mix of rain gardens, bioretention basins, swales and proprietary treatment devices. Modelling is typically done in a stormwater quality model nominated by the council.
Flooding is the risk question: whether the site sits in a flood planning area, what the flood planning level is, and what that does to minimum floor levels and lot layout. On a flood-affected site this can determine whether the yield in your feasibility is achievable at all, so it tends to be worth resolving before you exchange rather than after.
The trap on stormwater is the discharge point. A site with no lawful gravity connection to a council drainage system may need an easement over a neighbouring property, a pump system that councils are often reluctant to accept, or a redesign of the whole levels strategy. Easements over third-party land are negotiated commercially, so the cost is unknowable in advance and the timing is outside your control.
Roads, access and pavement
On a subdivision, the civil engineer designs the internal road geometry, longitudinal grades, intersections, turning paths, kerb and gutter, footpaths, and the pavement itself. Pavement design is a function of subgrade strength and expected traffic loading, and it is one of the areas where a geotechnical investigation pays for itself. Weak subgrade can mean deeper pavement, subgrade replacement or stabilisation, all of which are expensive over a large area.
Road widths, verge widths and intersection treatments are usually set by the council’s engineering standards rather than by the engineer’s preference, which is why an early conversation with the council’s development engineer tends to be more useful than an early conversation with anyone else.
Erosion and sediment control
Almost every site that disturbs ground needs an erosion and sediment control plan, and on a subdivision it is a substantive design, not a formality. It covers sediment basins, diversion drains, stabilised site access, temporary and permanent revegetation, and the staging of when each control goes in. Councils and state environment regulators both enforce it, and a sediment discharge event during construction can attract a penalty notice on top of the clean-up cost.
The plan is also a cost driver that developers routinely underestimate. Sediment basins take up developable area during construction, need dewatering and desilting, and have to stay in place until the catchment is stabilised.
Servicing coordination
The civil engineer usually coordinates the reticulated services: water, sewer, power, gas and telecommunications. On a subdivision the water and sewer design may be prepared by the civil engineer under the water authority’s accreditation scheme, or by a separately accredited designer, depending on the jurisdiction and the authority. Power and telecommunications are usually designed by the utility or its contractor to a layout the civil engineer coordinates.
The critical point for a developer is that servicing has its own approval chain, its own lead times, and its own headworks charges, and none of it moves at the speed of the council process. Sewer connections in particular can require an amplification of a downstream main, and the developer usually pays.
What the civil engineer generally does not cover
Scope confusion is common, so it is worth being clear about the neighbouring disciplines. Structural engineering (footings, slabs, framing, basements) is a separate engagement, though many consultancies offer both. Geotechnical investigation and reporting is a separate specialist. Hydraulic engineering, meaning the in-building water, sewer and fire services, is separate again and in some states is a licensed trade design. Traffic engineering and traffic impact assessment is usually separate, as is landscape architecture. Boundary definition is the surveyor’s work, not the engineer’s, and the two are commissioned differently. Our guide to land surveyors and subdivision surveys covers where that line sits.
Which drawings does a civil engineer produce, and at what stage?
Civil documentation generally comes in four waves, each tied to a different decision point in the project.
Concept civil design for the Development Application (DA)
The first package supports the Development Application (DA). Depending on the council and the scale of the project, this typically includes a stormwater management concept, a preliminary earthworks and levels plan, a concept road layout, a preliminary erosion and sediment control plan, and often a servicing strategy. On flood-affected land it may also include a flood impact assessment.
This package is deliberately not construction-ready. Its job is to demonstrate that the scheme in the Development Application (DA) can be built and drained lawfully. The risk is that a thin concept package produces vague conditions of consent, and vague conditions are where budget surprises live. A condition that simply says stormwater must comply with the council’s standards leaves the detailed design free to land anywhere.
Detailed civil design for the construction approval
After consent, the civil engineer produces the construction-grade drawing set: detailed earthworks and levels, the full drainage design with pit and pipe schedules, longitudinal sections and cross-sections for every road, pavement design, service alignments, the detailed erosion and sediment control plan, and the specification. This set is what gets lodged for the separate works approval described in the state-by-state section below.
It is also the set a civil contractor prices. A detailed design that is genuinely complete tends to produce tighter tender pricing and fewer variations. An incomplete one transfers risk into the contractor’s margin, or into your variation account later.
During construction
Civil engineers are commonly retained through construction for design clarifications, responses to requests for information, inspection at hold points, and certification that the works have been built in accordance with the approved design. Some councils require inspections by the design engineer at specified stages. Whether this phase is inside the original fee or an additional service varies by consultant, and it is worth pinning down in the fee proposal rather than at the first site meeting.
Work-as-executed and handover
At completion the engineer, usually with the surveyor, prepares work-as-executed drawings recording what was actually built, and certifies compliance so the council will accept the assets. Councils then commonly require a defects liability or maintenance period, often around 12 months, secured by a bond or bank guarantee, before the assets are taken on and the security is released. That release date matters to your cashflow, because the money sits with the council until then.
Which approval does the civil design feed, state by state?
This is where the terminology changes at every border, and it is the single most useful thing for a developer working across states to get straight. The consent itself is never enough to start civil works. In every jurisdiction there is a second, technical approval of the engineering design.
New South Wales
In New South Wales, subdivision work needs a Subdivision Works Certificate before it starts. The NSW Planning Portal states that a Subdivision Works Certificate “is required before commencing any subdivision works in connection with a development consent for the subdivision of land”, covering “civil works such as sewerage works, roadworks and earthworks”, and that it may be issued by either the council or a private certifier. The statutory basis sits in section 6.13 of the Environmental Planning and Assessment Act 1979 (NSW), which was introduced with the Part 6 certification provisions that commenced on 1 December 2019 and replaced the old practice of obtaining a Construction Certificate for subdivision work.
Two further approvals commonly sit alongside it, and both are easy to miss in a programme:
- Roads Act consent. Section 138 of the Roads Act 1993 (NSW) requires consent for works on a public road, which the NSW Planning Portal explains covers activities including opening a road, erecting or interfering with a structure or work on a public road, and pumping water onto a public road. Any kerb crossing, road opening for a service connection, or works in the verge tends to need one. On a classified road, Transport for NSW may also need to approve.
- Local Government Act approval. Section 68 of the Local Government Act 1993 (NSW) requires council approval for a defined list of activities, which commonly includes stormwater drainage work and connections to a council system.
Once the works are complete, a Subdivision Certificate is what allows the plan to be registered. The NSW Planning Portal notes that a subdivision certificate “authorises the registration of a plan of subdivision under Part 23 of the Conveyancing Act 1919”, and section 6.15 of the Environmental Planning and Assessment Act 1979 (NSW) sets out the restrictions on when one can be issued. That certificate is the gate between your civil works and your ability to settle any lot sales.
Victoria
In Victoria the engineering approval sits inside the Subdivision Act 1988. Section 15 of the Subdivision Act 1988 (Vic) allows a council or a referral authority to require an applicant to submit an engineering plan, including specifications, for works required under the planning scheme or permit, and requires the council or referral authority to approve the plan, specify the alterations it requires, or refuse it within the prescribed time. Section 16 requires works to comply with the standards specified in the planning scheme or permit, and section 17 deals with construction and maintenance of works.
The commercially important provision is section 21, the statement of compliance. A plan of subdivision generally cannot be registered until the council issues a statement of compliance confirming the statutory requirements have been met, which in practice means the works are done or bonded. For a developer selling lots off the plan, the statement of compliance date is effectively the settlement trigger.
There is a separate Victorian concept worth knowing on infill sites. Under regulation 133 of the Building Regulations 2018 (Vic), the design of a stormwater drainage system to the point of discharge from an allotment must be approved by the relevant building surveyor, and councils issue a legal point of discharge determination identifying where stormwater from the property must be discharged. If your site sits low, or the nominated point is on the far side of the block, that determination can reshape the whole drainage design. The mechanics of the Victorian process are covered further in our Victorian subdivision guide.
Queensland
In Queensland, the separate approval is a development permit for operational work. Operational work is a category of development under the Planning Act 2016 (Qld) covering works other than building and plumbing work, and for a subdivision it typically captures earthworks, roadworks, stormwater, water and sewer infrastructure, driveway crossovers and vegetation clearing. Brisbane City Council describes the operational work application as the approval sought after the planning approval and before construction begins, and requires the approved subdivision layout and functional layout drawings to accompany the application.
Queensland is also the state where certification is most explicit. Engineering drawings for an operational work application generally have to be certified by a Registered Professional Engineer of Queensland (RPEQ). Brisbane City Council, for example, requires on-site detention to be designed and certified by a Registered Professional Engineer of Queensland (RPEQ) in the civil area. This is not a council preference, it flows from the registration law discussed below.
South Australia
South Australia handles land division through the Planning, Development and Infrastructure Act 2016 (SA), with the technical engineering requirements sitting in design standards made under the Act. PlanSA publishes design standards that set requirements for infrastructure including roads, stormwater, footpaths and street landscaping. Where a division does not meet the standard criteria, councils assess the design against their own infrastructure requirements and the prescribed requirements in the Planning, Development and Infrastructure (General) Regulations 2017 (SA). Detailed plans are also required so servicing authorities can determine the location of existing services and the method of providing new ones.
Western Australia
Western Australia runs a two-stage process that catches out developers used to the eastern states. Subdivision approval is granted by the Western Australian Planning Commission rather than the local council, usually subject to conditions. The Western Australian Planning Commission publishes the application forms, guidelines and checklists for that process.
The civil work then follows the conditions. Detailed engineering drawings covering earthworks, retaining, service prelays, access pavement and drainage are prepared and submitted to the local government for approval, and clearances from the local government and the servicing utilities are what allow the deposited plan to proceed to the land registry. The practical consequence is that your civil engineer is working to conditions set by a state agency but negotiating the detail with a council, and early dialogue between the two tends to matter more in Western Australia than almost anywhere else.
There is also a clock on it. The Western Australian Planning Commission notes that a subdivision approval runs for 3 years for 5 lots or fewer and 4 years for more than 5 lots, and that under section 145A of the Planning and Development Act 2005 (WA) it may grant one extension of 2 years, but not more than one. To obtain the extension an applicant must show they have done everything reasonably practicable to submit the plan of survey within the original period, which in practice means the engineering drawings are signed off and works are substantially progressed. On a staged subdivision that timing pressure sits directly on the civil programme.
Tasmania, the Australian Capital Territory and the Northern Territory
The sequence in the smaller jurisdictions follows the same three steps even though the labels differ: a planning approval that sets conditions, then a separate technical approval of the engineering design by the council or the territory authority, then certification of completed works before titles issue.
What changes is how much of that is written down. Lower subdivision volumes mean engineering standards tend to be less codified and the scope of what the approving body will require is more variable, so the things worth establishing before design starts are the name of the technical approval and who issues it, whether the territory authority or the council holds the standard being applied, and the realistic assessment timeframe. Those are answers a local consultant or a pre-lodgement conversation will give you faster than a document search, and assuming an eastern-state process will apply is the way this goes wrong.
Who is legally allowed to sign the civil design?
Engineer registration in Australia is not national. It is a patchwork of state schemes with different scopes and different commencement dates, and the differences are material if you are working across borders or relying on an interstate consultant.
Queensland has the broadest and oldest scheme. Section 115 of the Professional Engineers Act 2002 (Qld) prohibits a person who is not a practising professional engineer from carrying out professional engineering services, with a maximum penalty of 1,000 penalty units. The scheme applies across all sectors rather than only the building sector, which is why Registered Professional Engineer of Queensland (RPEQ) certification appears on essentially every page of a Queensland civil drawing set. There are exceptions, including work carried out under the direct supervision of a Registered Professional Engineer of Queensland (RPEQ) who is responsible for the services, and work done only in accordance with a prescriptive standard.
Victoria registers professional engineers under the Professional Engineers Registration Act 2019 (Vic) across five areas: civil, structural, electrical, mechanical and fire safety. The Victorian Building Authority states that mandatory registration of civil and structural engineers in the building industry commenced on 1 July 2021, and that all other civil and structural engineers were required to register by 1 October 2022. As in Queensland, an engineer does not need to register if working under the direct supervision of a registered practising professional engineer, or only in accordance with a prescriptive standard.
New South Wales has a narrower scheme. The Design and Building Practitioners Act 2020 (NSW) makes it an offence to carry out professional engineering work in a prescribed area of engineering in relation to the design or construction of a class 2 building while unregistered. Class 2 covers apartment buildings, including mixed-use buildings with a class 2 component. A conventional land subdivision usually sits outside that scheme, so in New South Wales the assurance you rely on for subdivision civil design tends to come from the certifier and the council rather than from a statutory engineering registration.
Western Australia is mid-transition. The Western Australian building engineers registration scheme, prescribed under the Building Services (Registration) Act 2011 (WA), commenced on 1 July 2024. Structural and fire safety registration opened first, with civil and mechanical from 1 July 2025, and a transition period during which unregistered people may lawfully continue to do building engineering work until registration becomes mandatory for all four areas on 1 July 2027. The Western Australian government states that a person performing building engineering work after 1 July 2027 without the required registration, or outside the scope of their registration, commits an offence carrying a fine of up to $25,000. Note the scope: the scheme covers building engineering work for a building or incidental structure under the Building Act 2011 (WA) and the National Construction Code, so how far it reaches into pure subdivision civil work is a question worth putting to your consultant directly.
The Australian Capital Territory operates a professional engineers registration scheme under the Professional Engineers Act 2023 (ACT), covering civil, structural, electrical, mechanical and fire safety across all industry sectors. The ACT Government states the scheme commenced on 6 March 2025.
Tasmania and the Northern Territory have narrower building-sector schemes rather than general engineering registration.
One cross-border wrinkle is worth knowing if you use an interstate consultant. Automatic mutual recognition lets an engineer registered in one state or territory work in another on their home registration, but the ACT Government notes that Queensland is not currently participating, so engineers registered in Queensland cannot work in the Australian Capital Territory under automatic mutual recognition, and vice versa. It also notes that schemes in several jurisdictions cover only the building and construction industry, so a registration obtained through mutual recognition may carry conditions limiting its scope.
The practical point for a developer is not to memorise the schemes. It is to ask, before you engage, whether the individual who will sign your drawings holds the registration your jurisdiction requires for the work you are doing, and to check that the registration is current when the drawings are actually signed rather than when the engagement letter was written.
What standards is the civil design assessed against?
Councils generally assess civil designs against a stack of documents rather than a single one, and knowing what sits in the stack helps you read conditions of consent.
At the top is the council’s own engineering standard or development design specification. Councils rarely write these from scratch. Most adopt or adapt a published suite, and the ones that turn up repeatedly are the Austroads guides for road geometry and pavement design and the standard specifications and drawings issued through local government engineering bodies. These are the documents that fix road widths, pipe sizes, minimum grades and pit spacing, and they are where the difference between two neighbouring councils shows up in your budget. The version that applies is the version the council nominates, which is not always the current one.
Beneath that sit the state technical references. In Queensland, the Queensland urban drainage manual provides a standardised approach to planning and designing urban stormwater drainage, and while the Queensland Government notes it is not a statutory document, it is referenced in most council planning schemes. Australian Standards, published by Standards Australia, carry the detail on stormwater drainage, parking facilities and access driveways, and drawing conventions. They sit behind a paywall, which matters mainly because your consultant holds them and you generally will not, so a condition citing a standard by number is one to have explained rather than skimmed.
The reason this matters commercially is that conditions of consent frequently incorporate these documents by reference. A condition requiring compliance with a council’s design specification is a condition that may add cost you have not seen, because the specification is 200 pages long and your feasibility was built on a concept drawing.
When does engaging a civil engineer early actually change the numbers?
Before you buy. The questions a civil engineer can answer in a few hours of desktop work are the questions most likely to break a deal, and they are cheap relative to the exposure.
The high-value pre-acquisition questions tend to be:
- Is there a lawful gravity discharge point, and where is it? If the answer is no, the site may need an easement over neighbouring land, and that is a commercial negotiation with an unknowable price.
- What does the fall across the site do to the earthworks balance? A steep site can generate cut and fill volumes, retaining walls and batters that swamp the margin.
- Is the land flood affected, and at what level? Flood planning levels drive minimum floor levels, which drive fill volumes, which drive retaining.
- What is the likely subgrade? A soft or reactive subgrade can mean deeper pavement or stabilisation across the whole road area.
- Is there capacity in the downstream sewer and water network? Amplification works are usually at the developer’s cost and are rarely in an early feasibility.
- What does the council’s engineering standard require for roads at this lot yield? Road reserve width consumes developable area, so it changes yield as well as cost.
A concept-level civil review before exchange, or during a due diligence period, is small relative to the exposure it tests. The alternative is carrying a placeholder civil allowance into an acquisition and discovering the real number after settlement, when the options have narrowed to redesign or absorb. The total development cost framing is useful here, because civil work is one of the few line items that can move by six figures on a design decision made in the first month.
What do civil engineering fees look like on a development?
There is no government-published fee scale for civil engineering consultancy in Australia, and fees vary widely with site complexity, lot count, council, and how much of the construction phase sits in the scope. What follows is market practice rather than a published rate, and a current fee proposal from a consultant who has seen your site is the only reliable figure.
Broadly, consulting civil engineering design fees on subdivision and multi-unit projects are commonly quoted as a percentage of the estimated civil construction value, often in the low single digits for larger jobs and higher in percentage terms for small ones, or as a lump sum per stage. Small infill jobs are more often quoted as a fixed fee for a defined drawing set. Fee proposals that look unusually cheap are worth reading closely for what has been excluded rather than treated as a saving, because the excluded items usually reappear later as variations.
How fees are usually structured
Most proposals break into stages that mirror the approval process: a concept or Development Application (DA) package, a detailed design package for the works approval, a construction phase allowance, and a certification and work-as-executed allowance. Splitting the fee this way gives you natural decision points, and it means an abandoned project does not carry a full design fee.
Percentage-of-construction-value fees have an obvious tension worth naming: the consultant’s fee rises with the cost of the works they design. Lump sum fees remove that tension but transfer scope risk to the consultant, who will price for it. Neither is right or wrong, but knowing which structure you are in tends to change how you read a design recommendation that adds cost.
What is commonly excluded
The exclusions list is where fee proposals differ most. Items frequently sitting outside a base civil fee include geotechnical investigation, survey, traffic impact assessment, flood modelling on complex catchments, acid sulfate soil or contamination work, water and sewer design where the authority requires a separately accredited designer, council and authority application fees, redesign following a change to conditions, extended construction phase services if the programme runs long, and work-as-executed drawings.
Council and authority fees are worth isolating in your budget because they are set by the approving body, not the consultant, and can be substantial on a large civil job. So can headworks or infrastructure contributions, which are a separate matter again.
Where civil engineering hits the feasibility hardest
Civil construction is often the biggest single line on a subdivision
On a land subdivision with no buildings, civil construction is frequently the largest cost after land. Earthworks, roads, drainage and services together can dominate the build budget, and the design decisions that set those quantities are made months before a contractor is appointed. That is why a design-stage review by a Quantity Surveyor (QS), or at minimum a cost check against recent tendered rates, is generally more useful on a subdivision than on a building project where the rates are better understood. Our guide on construction contingency covers how to size the allowance around that uncertainty.
The approval is a programme gate, not a formality
The second technical approval, whatever it is called in your state, is a hard gate. No Subdivision Works Certificate in New South Wales means no lawful subdivision work. No operational work permit in Queensland means the same. Assessment timeframes for these approvals are separate from the planning assessment and are frequently underestimated in feasibility programmes, particularly where a request for information resets the clock.
The compounding problem is at the other end. Titles do not issue until the works are certified complete and the relevant certificate or statement of compliance is issued, and off-the-plan purchasers cannot settle until titles issue. Every week of civil delay is a week of interest on peak debt with no revenue against it. Building the civil approval and construction sequence properly into your construction programme is one of the more valuable pieces of modelling work on a subdivision.
Bonding uncompleted works
Most jurisdictions allow some form of security so that titles can issue before every last item of civil work is finished, typically through a bond or bank guarantee held by the council. Landscaping and minor works are the usual candidates. The commercial value is obvious: it can pull settlement forward by months. The cost is that the security ties up either cash or bank facility capacity, and it stays tied up through the maintenance period. Whether bonding is available, and for what, is a council-by-council question worth asking early rather than assuming.
How does a multi-unit infill site differ from a greenfield subdivision?
The disciplines are the same but the weighting changes completely.
On an infill multi-unit site there is usually no new public road, so pavement and road geometry largely fall away, replaced by driveway design, turning path checks and grade transitions at the crossover. Stormwater becomes proportionally more significant, because a small site with a high impervious ratio still has to meet detention and water quality targets, and the space for a basin does not exist. Detention usually ends up as a tank under the driveway or in the basement, which puts it in tension with the structural and hydraulic design.
Earthworks change character too. Instead of bulk regrading, the issue tends to be basement excavation, shoring, dewatering and the interaction with neighbouring footings. That is often more a structural and geotechnical question than a civil one, but the civil engineer still owns where the water goes.
The other infill-specific issue is the connection point. On a constrained site, the location of the legal discharge point and the depth of the council main determine whether a gravity system works at all, and a charged or pumped system may attract council resistance. This is the question to resolve before the architect fixes the ground floor level, not after.
Where the site is being strata subdivided rather than Torrens subdivided, the civil scope may reduce further, but the interaction with the surveyor and the planning approval remains. Our land subdivision guide sets out how the two title paths differ.
How does this work in New Zealand?
New Zealand follows a comparable sequence with different statutory labels. Subdivision requires resource consent, and the engineering detail is typically resolved through an engineering plan approval process run by the territorial authority against its regional engineering standard.
Two certificates then control the path to title. Under the Resource Management Act 1991, a section 223 certificate is the council’s approval that the survey plan accords with the subdivision consent. The Land Information New Zealand guidance explains how these certificates fit the registration process. A section 224(c) certificate then confirms that the conditions of consent have been complied with, which in practice means the physical engineering works are complete, or are secured by a bond to the council. Section 224 of the Resource Management Act 1991 (NZ) sets out the restrictions on depositing a survey plan, including that the section 223 approval must be less than three years old at deposit.
For a New Zealand developer, the commercial shape is the same as in Australia: the section 224(c) certificate is the settlement gate, and any bond arrangement that lets it issue before the works are finished has a cash cost attached. Engineering registration in New Zealand runs through the Chartered Professional Engineer regime rather than a state-based scheme.
What to ask your civil engineer
The questions below are the ones a civil engineer can answer on your specific site and this guide deliberately cannot. Ask them at the fee proposal stage, not after the first invoice.
On scope and deliverables
- Exactly which drawings and reports are in this fee, at each stage, and which are excluded?
- Is water and sewer design included, or does the authority require a separately accredited designer here?
- Are construction-phase services, site inspections and work-as-executed drawings inside the fee or an additional service?
- Who prepares the flood assessment if the council asks for one, and at whose cost?
- If conditions of consent require a design change, how is that priced?
On the site itself
- Where is the lawful discharge point, and can this site drain to it by gravity?
- If not, what are the options, and what does each do to the programme?
- What is your preliminary cut and fill balance, and does this site import or export material?
- What retaining is implied by the levels strategy, and roughly how many square metres of wall?
- Is the site flood affected, and what flood planning level would apply?
- What does the council’s engineering standard require for road reserve and pavement at this lot yield?
On approvals and registration
- Which separate works approval applies here, who is the approval authority, and what is the realistic assessment timeframe?
- Are you registered in the relevant area in this state, and will the person signing the drawings hold that registration?
- Have you worked with this council’s development engineers before, and what do they tend to be strict about?
- Is a pre-lodgement meeting available, and would you attend it?
On cost
- What is your order-of-magnitude civil construction estimate at concept stage, and what is the confidence range on it?
- Which elements of the design are most likely to move that estimate?
- Are there design options that would materially reduce the earthworks or drainage cost, and what do they cost in yield or amenity?
- What council and authority fees should I budget for on top of your fee?
What to ask your council before design starts
A pre-lodgement or pre-application meeting with the council’s development engineer is generally the cheapest hour on the project. The useful questions are narrow and factual.
- Which engineering standard or design specification applies, and which version?
- What is the nominated discharge point for this site, and is there capacity?
- What detention and water quality targets apply, and which model do you accept?
- What road reserve width and pavement standard would you expect for this layout?
- What can be bonded rather than completed before titles issue, and on what terms?
- What is the current assessment timeframe for the works approval, and what most commonly triggers a request for information?
The answers to those six questions will generally do more for the accuracy of your civil budget than any amount of desktop estimating. Many councils charge a fee for a formal pre-lodgement meeting and some offer an informal duty-engineer conversation at no cost, so what the service costs and what it includes is worth confirming with the council before booking it.