The fastest way to delay a resource consent application is to engage your civil engineer without the information they need to prepare the engineering assessment. A complete initial brief takes five minutes to compile and can save weeks of back-and-forth. The minimum package includes a site survey, title boundaries, a geotechnical report if the site is non-standard, an indication of intended lot count, and any existing consent conditions. Here is the full list, and why each item matters.
The essential information package
1. Site survey (topographical survey)
A topographical survey showing existing ground levels, boundary pegs, existing buildings, fences, trees, and any visible services (manholes, toby boxes, power poles). The survey must be referenced to a known datum, ideally NZVD2016, so that the engineering design can be coordinated with council records and LINZ data.
Why it matters: Without a site survey, the engineer cannot design pipe gradients, road levels, stormwater systems, or earthworks. This is the single most critical input. If you don't have one yet, commission it immediately; it takes one to two weeks to arrange and complete.
2. Certificate of title and survey plan
A current certificate of title showing the legal description, area, and any registered interests (easements, covenants, encumbrances). The deposited survey plan (or scheme plan if available) confirms the boundary dimensions and any existing easements.
Why it matters: Existing easements may restrict where infrastructure can be located. Covenants may impose building restrictions that affect lot layout. The engineer needs to know about these constraints before starting the design.
3. Intended lot count and layout
Even a rough sketch showing how many lots you want and approximately where you see them sitting on the site. This does not need to be a finalised scheme plan. A hand-drawn sketch on a printed aerial photo is sufficient at this stage.
Why it matters: The lot count determines the infrastructure demand (how many wastewater connections, how much stormwater to manage, what road width is required). The engineer needs this to scope the assessment correctly and provide an accurate fee estimate.
4. Geotechnical report
If the site has any of the following characteristics, a geotechnical investigation should be commissioned before or alongside the engineering engagement:
- Sloping ground (greater than about 1 in 6)
- Known fill or former landfill
- High water table or visible springs
- Coastal or riverbank location
- Liquefaction-prone area (check the council hazard maps)
Why it matters: Geotechnical conditions determine foundation requirements, earthworks constraints, and whether soakage-based stormwater disposal is feasible. On the Hereford Heights subdivision, the geotechnical report confirmed that on-site soakage was viable, which avoided the need for a piped stormwater discharge to a receiving waterway.
5. Existing consent conditions
If the site already has a land use consent, subdivision consent, or any other RMA consent, provide a copy of the decision and conditions. Previous consents often contain conditions that carry forward to subsequent applications, such as minimum floor levels, noise attenuation requirements, or specific infrastructure standards.
Why it matters: The engineer needs to design to any existing conditions. Discovering a floor level restriction or a stormwater management condition midway through the design means rework.
6. Council pre-application meeting notes
If you have had a pre-application meeting with the council's planning or engineering team, provide the notes or written summary. These meetings often reveal council preferences or concerns that are not documented in the district plan.
Why it matters: Pre-application feedback can steer the engineering design towards an approach the council will accept, reducing the risk of a request for further information (RFI) after lodgement.
7. Services location information
A "before you dig" (Beforeudig) enquiry showing the location of existing underground services (water, wastewater, stormwater, power, gas, telecommunications) in the road reserve adjacent to the site. This is a free service and takes 24 to 48 hours to process.
Why it matters: The engineer needs to know where existing services are to design connection points and avoid clashes. On the Kensington Road subdivision, the Beforeudig data confirmed the available wastewater and water main connections in the adjacent road, allowing the scheme design to proceed without additional site investigation.
Nice to have (but not essential at day one)
- Aerial photography: A recent drone photo or Google Earth screenshot helps the engineer understand the site context, but the topographical survey is what matters for design.
- Neighbour consultation feedback: If you have spoken to neighbours about the development, any feedback (positive or negative) is useful context for the engineer and planner.
- Budget expectations: Knowing your target construction budget helps the engineer scope the design appropriately. A simple two-lot subdivision has different design expectations to a 30-lot development.
What happens if information is missing?
The engineer will ask for it, and the design will pause until it arrives. Every round of requests adds one to two weeks to the programme. On a straightforward subdivision, the engineering assessment takes four to eight weeks to prepare. Missing information can easily extend that to twelve weeks or more. Compiling the full package before engaging your engineer is the single most effective thing you can do to keep your project on schedule.
Seven items make up the ideal initial brief: site survey, title, intended lot count, geotechnical report (if applicable), existing consent conditions, pre-application notes, and services location data. Providing the full package at engagement saves weeks of back-and-forth and keeps your consent application on track.