Most Sydney Development Applications require a detail survey if works are within 1 metre of boundaries. If you're proposing extensions or additions close to property lines, you'll need a boundary survey too. The exact type depends on your project, your property location, and what your local council requires. We'll walk you through which survey you need and why it matters.
Why Surveyors Matter When Lodging a DA
Councils don't just want your architect's drawings—they need accurate, certified site data before they'll approve anything. A qualified surveyor gives them that. They map existing structures, boundaries, levels, and how your neighbour's windows line up with your proposed works. This isn't red tape; it's how councils protect property rights and prevent costly disputes down the road.
Here's the thing: a survey caught at the DA stage saves money and delays later. If your plans don't match the actual site, council rejects your application. You then have to pay your architect to redraw, resubmit, wait again. The surveyor's job is to give you—and council—the truth about what's on the ground.
You'll actually need two surveys across the whole project. The first happens now, before lodgement. The second (called a "set-out") happens after your DA is approved and your construction certificate is issued, before builders actually start. That second one costs less and takes a day, but it's non-negotiable.
The Two Main Surveys You'll Need
When you're preparing a DA for a residential extension, renovation, or new build in Sydney, your surveyor will likely prepare one of two things—or both, depending on your project.
Survey Type | Purpose | What It Shows | When You Need It |
Detail Survey | DA lodgement & site planning | Existing buildings, trees, levels, easements, neighbouring structures, windows, fences, contours | Nearly all DAs except internal fitouts or change-of-use with no external works |
Boundary Survey | Legal certainty & setback verification | Exact property corners and lines, marked on site | When works are within 1m of side or rear boundaries |
Detail Survey – Your DA Foundation
A detail survey (also called a contour and detail survey) is the workhorse of the DA process. It shows everything about your property and the land around it.
Your surveyor will mark:
- All existing buildings on your land, with floor levels and roof heights
- Trees, sheds, pools, fences, retaining walls
- Neighbouring structures within 3 metres of your boundary (with their heights and window locations—this matters for setback rules)
- Ground levels and contours
- Easements (stormwater pipes, electrical lines, water mains)
- True north point, scale, measurements
This detail becomes your architect's baseline. They design around it. Council assesses against it.
A detail survey is required for most DAs. The exceptions: if you're just changing the use of a building (turning a garage into office space, for example) with no external alterations, or if you're doing an internal fitout, council might not ask for one. But if your project touches the exterior, involves structural work, or sits close to a boundary, expect to need it.
The surveyor must be registered with the Board of Surveying and Spatial Information (BOSSI) in NSW. Their name and registration number go on the plan. Unregistered surveyors' work isn't valid for council purposes—don't risk it.
Boundary Survey – The Legal Certainty
A boundary survey establishes the exact legal limits of your property. It's not the same as a detail survey, though surveyors often combine them.
If your proposed works fall within 1 metre of your side or rear boundaries, council requires a boundary survey as part of your DA. This is true for extensions, new builds, fences, or subdivisions. The surveyor marks the actual corners of your land (usually with nails or marks) and certifies the dimensions. It's the legal proof of where your property ends and your neighbour's begins.
You need a boundary survey when:
- Building an extension within 1m of a boundary
- Constructing a new house on a tight block
- Installing a fence and want certainty on the line
- Subdividing or dealing with a boundary dispute
- Building on a corner block or an irregularly shaped property
Without a boundary survey, you risk building partly on your neighbour's land, triggering disputes and forcing costly demolition or remediation. Councils know this, which is why they ask for it.
How to Know Which Survey Your Project Needs
Ask yourself three things:
1. What's the project? — New house, extension, renovation, subdivision, fence, or pool? Each has different requirements. A new house almost always needs both detail and boundary surveys. A fence might need just a boundary survey.
2. How close to boundaries are you building? — If your works are 1 metre or more away from all boundaries, you likely need only a detail survey. Under 1 metre triggers a boundary survey.
3. What does your local council want? — Each Sydney council has a checklist. Northern Beaches, Canterbury-Bankstown, City of Sydney—they all specify what's needed. Your architect usually knows, but call council's planning department if in doubt. It takes 5 minutes and saves mistakes.
Most residential DA projects need a detail survey as a minimum. Add a boundary survey if you're tight to the edge.
The DA Survey Timeline & Cost
Surveying Sydney work is usually fast. A detail survey typically takes 5–10 business days from instruction to finished plan, depending on property size and complexity. Weather and site access can add a day or two.
Boundary surveys are similar—5–10 days—but if the boundary is unclear (lost pegs, overgrown lines), it can stretch to 2–3 weeks.
Typical costs in Sydney:
Survey Type | Typical Cost | Factors That Affect Price |
Detail Survey | $1,200–$2,000 | Lot size, complexity, contours, neighbouring structures |
Boundary Survey | $800–$1,500 | Lot size, boundary clarity, pegging required |
Combined Detail + Boundary | $1,800–$2,800 | Usually cheaper than booking separately |
These are ballpark figures. A large property with complex contours or tight boundaries costs more. A small, flat block costs less. Get a few quotes—most surveyors offer a free phone quote based on your property address and project type.
Quality matters here. A cheap survey that misses a setback requirement means a rejected DA and more cost later. A registered surveyor's fee is an investment in getting it right.
What Happens After You Lodge Your DA?
Once council approves your DA and you get your construction certificate, you need a second survey: a "set-out" or "building set-out" survey. This happens on site before construction starts. The surveyor marks exactly where the building footprint goes, so the builders stay within the approved envelope.
Set-out surveys are smaller and faster—usually one visit, a couple of hours—and cost $500–$1,000. Councils and certifiers require this before construction commences. It's not optional.
Think of it this way: the detail/boundary survey is about proving your design fits the site. The set-out survey is about proving the builders build where council approved.
Partner With Experienced Surveying Sydney Professionals
Getting surveying Sydney work right from the start makes the whole DA process smoother. Geo Point Surveyors has the registered experience and local knowledge to guide you through it.
We handle detail surveys, boundary surveys, and set-out work for residential and commercial projects across Sydney. We know council requirements by suburb, we turn work around fast, and we price transparently—no hidden costs, no surprises.
Whether you're building an extension, designing a new house, or planning a subdivision, we'll tell you upfront what surveys you need and why. We work closely with your architect, council, and builder to keep things on track.
Get in touch for a free chat about your project. We'll advise on what you need and give you a quote on the spot.
FAQs
Do I need a survey for every type of DA?
No. Internal fitouts and change-of-use applications with no external works don't usually require surveys. But if your project involves external alterations, new construction, or anything within 1 metre of a boundary, expect to need one. Ask your council or architect—it takes one call.
What's the difference between a detail survey and a boundary survey?
A detail survey shows everything on and around your property (buildings, trees, levels, utilities). A boundary survey pinpoints your exact legal property lines and corners. Most DAs need a detail survey. If you're building within 1 metre of a boundary, you also need a boundary survey. Many projects use both.
Can I use an old survey, or do I need a new one?
Councils want current surveys. If your last survey is more than a year old, get a new one—things change (structures added, trees removed, fences moved). A registered surveyor will check your title and advise. In most cases, starting fresh is safer and not much more expensive.
What if my property is small or in a strata scheme?
Strata properties and small lots still need surveys, but they're often simpler and faster because there's less ground to cover. Your surveyor will confirm boundaries from the strata plan and title documents. Costs are usually lower for strata than freehold. Strata subdivisions have their own rules, so confirm with your surveyor or council early.
How much does a DA survey cost in Sydney?
Typical range is $1,200–$2,800 depending on the survey type, lot size, and complexity. Get quotes from two or three registered surveyors. Most offer free phone estimates based on your address and project. It's worth comparing, but the cheapest quote isn't always the best—experience and speed matter.