If you are planning a new home, renovation, extension or property development, there is a good chance your architect or designer will ask for a detail and contour survey before they start designing.

There is a practical reason for this.

Good design starts with an accurate understanding of the existing site. A detail and contour survey records the physical features of the property along with its levels and contours, giving your project team reliable information to design from.

For many building and development projects across Sydney and NSW, it is one of the first surveying steps in the process.

SurveyPlus provides professional detail and contour surveys for homeowners, architects, builders and developers, capturing accurate site information tailored to the requirements of the project.

Been asked to organise a detail and contour survey? Request a quote from SurveyPlus and send through your property and project details.

What Is a Detail and Contour Survey?

A detail and contour survey is a type of land survey that records the existing features, dimensions and levels of a property.

There are really two parts to it.

The detail survey captures relevant physical features on and around the site. Depending on the project, this might include the existing house, sheds, fences, retaining walls, driveways, trees, visible services and relevant features of adjoining properties.

The contour survey records levels across the land to show its shape, slope and changes in elevation.

Together, this creates an accurate representation of the existing site that architects, designers, engineers and other consultants can use when planning proposed work.

What Does a Detail and Contour Survey Show?

The information included depends on the property and what the survey is being prepared for.

A typical survey may show features such as:

• property boundaries and dimensions
• existing buildings and structures
• ground levels and contours
• fences and retaining walls
• significant trees and vegetation
• driveways and access points
• visible services
• adjoining buildings or features where relevant.

It may also capture additional information requested by an architect, engineer or local council.

This is why SurveyPlus recommends providing any architectural brief, development requirements or other relevant documents when requesting a quote. The survey can then be scoped around what the project actually needs.

When Do You Need a Detail and Contour Survey?

Detail and contour surveys are most commonly required before design work begins.

If you are building a new home, the architect needs to understand the dimensions and levels of the existing land before deciding how the proposed building should sit on the site.

The same applies to renovations and extensions. Existing buildings need to be accurately located, while site levels and surrounding features can influence everything from floor levels and access to drainage and retaining requirements.

You may also need a detail and contour survey for:

• a duplex or dual occupancy
• townhouse development
• subdivision or land development
• swimming pool design
• landscaping or retaining works
• commercial development
• certain Development Applications.

If an architect, planner or local council has requested a site survey, it is worth confirming exactly what information they require before the fieldwork is completed.

Why Are Contours Important?

A property can look relatively flat when you stand on it while still having meaningful changes in elevation.

Contour information allows the project team to understand those changes accurately.

For an architect or designer, this can influence how a building responds to the site. For an engineer, levels may be important when considering drainage, earthworks, retaining structures or other aspects of the development.

Accurate levels are particularly valuable on sloping sites, where even modest changes in elevation can have a significant impact on the design.

Rather than designing from assumptions, the contour survey gives the team measured information about the actual land.

Do I Need a Detail and Contour Survey for a Renovation?

It depends on the scope of the renovation.

For internal work that does not materially affect the building footprint or site, a new land survey may not be necessary.

For an extension, major renovation or project involving external works, a detail and contour survey is much more likely to be required.

Your architect may need accurate information about the existing building, property boundaries, ground levels and neighbouring features before preparing plans.

If you already have an older survey, don’t assume it can automatically be reused. The site may have changed, and the previous survey may not contain the level of detail required for the new project.

SurveyPlus can review your requirements and advise on the appropriate surveying scope.

Do You Need One Before Building a New Home?

In most new-home projects, accurate site information is needed before detailed design can progress.

A detail and contour survey gives the architect or building designer a reliable base plan showing the existing conditions of the property.

This helps inform decisions around the proposed building footprint, levels, access and relationship with surrounding features.

Depending on the project, additional surveying services may be required later. For example, a boundary survey may be needed where legal property boundaries need to be established, while construction surveys can be required when the approved design is ready to be set out on the site.

The detail and contour survey is often the starting point rather than the only survey required throughout the project.

Is a Detail and Contour Survey the Same as a Boundary Survey?

No. They serve different purposes.

A detail and contour survey primarily records the physical features and levels of the site for design and development purposes.

A boundary survey is cadastral surveying undertaken to establish or re-establish the legal property boundaries.

There can be some overlap in the information shown on plans, but one should not automatically be treated as a substitute for the other.

If your project involves building close to a property boundary, subdivision, a new fence or uncertainty around the legal property line, tell SurveyPlus when requesting the survey. The team can advise whether additional boundary surveying is required.

Not sure which survey you need? Visit What Survey Do I Need? or speak with the SurveyPlus team before getting started.

How Is a Detail and Contour Survey Completed?

The process normally starts before the survey team arrives on site.

SurveyPlus reviews the property and the requirements of the project so the fieldwork can be planned appropriately.

A land surveyor then attends the property and takes precise measurements of the relevant features and levels. Modern surveying equipment allows the survey team to accurately capture the site and establish the information required for the plan.

The field data is then processed and drafted into a survey plan that can be supplied to the relevant project professionals.

For the client, the process is relatively straightforward. The important part is making sure SurveyPlus understands why the survey is being commissioned so the correct information is captured the first time.

What Should You Give Your Surveyor Beforehand?

If an architect, engineer, builder or planner has requested the survey, send through whatever information they have provided.

This might be an architectural brief, existing plans, council requirements or previous survey information.

You should also explain what you are planning to do with the property.

There is a big difference between preparing a survey for a small residential extension and one for a larger property development. Understanding the end goal allows the surveying services to be scoped around your specific needs.

How Much Does a Detail and Contour Survey Cost?

There is no fixed cost that applies to every property.

The price can depend on the size of the land, terrain, access, number of buildings and site features, the amount of detail required and the final deliverables.

A relatively straightforward suburban block will generally involve a different amount of surveying work from a large, steep or heavily developed site.

The best way to establish the cost is to provide SurveyPlus with the property address and explain what the survey is required for.

That allows the survey team to review the site and provide a quote based on the actual scope rather than a generic estimate.

How Long Does a Detail and Contour Survey Take?

Timing depends on the property and scope of work.

SurveyPlus advises that detail and contour surveys are typically booked for site survey within approximately three to five business days following quote acceptance, with the completed plan generally provided around three to four business days after the site survey. Actual turnaround can vary depending on the project requirements.

If you are working towards an architect meeting, Development Application or another deadline, mention it when requesting your quote.

Why Getting the Survey Right at the Start Matters

A detail and contour survey may represent a relatively small part of the overall project, but the information it provides can influence much larger decisions.

Architects and designers use the survey as the base for their work. Engineers and other consultants may also rely on its measurements and levels.

If important information is missing, additional surveying may be required later. In some cases, that can interrupt the design process or create unnecessary delays.

The aim should therefore be to capture the right information at the beginning, not simply the minimum amount of information possible.

SurveyPlus works with property owners and project professionals to understand the intended use of the survey and provide an appropriate scope from the outset.

Need a Detail and Contour Survey in Sydney or NSW?

If you are planning a new home, renovation, extension or property development, a detail and contour survey can give your project team the accurate site information they need to begin the design process.

SurveyPlus provides professional land surveying services across Sydney and NSW, working with homeowners, architects, builders, engineers and developers across projects of different sizes and complexities.

If you’ve already been given requirements by an architect, designer or local council, send them through with your enquiry. If you’re not sure exactly what survey you need, tell us what you’re planning and the SurveyPlus team can help.

Request a free quote from SurveyPlus for your detail and contour survey.

Frequently Asked Questions