Someone has made an offer on your land and you’re not sure the number is fair. Or you’re weighing up a site near Campbelltown and need to know how much you can pay before the project stops stacking up. In both cases the question underneath is the same: what is this land worth once you factor in what can actually be built on it?

A development feasibility valuation in Macarthur answers that. It works backwards from the value of the finished project to find the residual land value, which is what’s left for the land after every cost and a reasonable profit have been paid. Understanding different valuation purposes can also help owners choose the right type of assessment for their situation.

This article explains how that works, what feeds the numbers, and where people commonly get caught out.

Summary

A development feasibility valuation estimates what a site is worth to a developer. It starts with the expected sale value of the finished project, then subtracts selling costs, construction, professional fees, government charges, finance and a profit-and-risk allowance. What’s left is the residual land value, helping owners with understanding what their property could support.

The result is very sensitive to its inputs. In the worked example below, a 5% fall in sale prices wipes roughly 27% off the land value. In Macarthur, the inputs that matter most are the yield the planning controls allow, state and local infrastructure charges, site constraints and current sales evidence for comparable new dwellings.

A residual figure isn’t the same as a bank valuation, and it isn’t automatically the price your land will sell for. It’s best read as a range with clearly stated assumptions. Before relying on one, get the planning, cost and GST assumptions checked by the right professionals.

Development Feasibility Valuation Macarthur: What It Actually Tells You

A standard market valuation answers one question: what would this property sell for today, as it stands? A development feasibility valuation adds a second: what could a developer sensibly pay for this site, given what can be built on it?

The two answers can differ a lot. An older house on a large block near a station might be valued as a house. A developer looking at the same block might see dual occupancies or townhouses, depending on the zoning, lot size and planning controls.

People usually ask for one when they’re:

Landowners who’ve been approached by a developer and want a benchmark before responding.
Developers and investors setting a ceiling on what they can pay for a site.
Solicitors, accountants and trustees dealing with joint ventures, option agreements, partnership splits or estates that include development sites.
Families deciding whether to sell, hold or develop land they’ve inherited.

One caution up front. Residual valuations are estimates built on assumptions, not precise measurements. The API’s guidance for Australian and New Zealand valuers warns against presenting a residual result as an exact statement of value, and suggests giving a range where the instructions allow. A good report also shows which inputs have the biggest influence on the answer.

How Residual Land Value Is Determined, Step by Step

The logic runs backwards. Residual land value is the total value of the finished development, less all development costs including profit but excluding the land itself. In practice, the valuer works through these steps:

Decide what the project could be. This is the number of dwellings, lots or square metres of floor space that’s physically possible, permitted under the planning controls and financially sensible.
Estimate the end value. This is what the finished dwellings, lots or buildings would sell for, based on current sales evidence.
Deduct selling costs. These are agent fees, marketing and sales legals.
Deduct construction and professional fees. These cover building costs, site works, a contingency, and design, engineering and certification fees.
Deduct government and utility charges. These are infrastructure contributions, servicing and other authority costs.
Deduct finance and holding costs over the life of the project.
Deduct the developer’s profit and risk allowance.
What’s left is the residual land value. Purchase costs such as NSW transfer duty and legal fees then come off, which gives the price a developer could actually offer.

A simple worked example

The numbers below are round figures for illustration only. They aren’t current Macarthur market evidence. Imagine a site with approval for six townhouses:

Item	Amount
End value (6 × $950,000, after GST)	$5,700,000
Less selling costs (2.5%)	−$142,500
Net end value	$5,557,500
Less construction, including contingency	−$3,000,000
Less design, engineering and consultant fees	−$270,000
Less infrastructure contributions and authority charges	−$250,000
Less finance and holding costs	−$300,000
Less developer’s profit and risk (15% of end value)	−$855,000
Residual land value (before purchase costs)	$882,500

Now test it. If end values are 5% lower, the residual drops to about $647,000. That’s a fall of roughly $235,000, or about 27%. If construction costs blow out by 10% ($300,000), the residual drops by the same $300,000, or about 34%, with everything else unchanged.

That’s the catch with residual valuations. The land is the balancing figure, so any movement in the big numbers lands on it. It’s why a careful valuer shows a sensitivity analysis rather than a single number.

What Feeds the Numbers in a Macarthur Feasibility

End values

The sales evidence needs to match the product. That means comparable new dwellings or lots in comparable locations, not resales of older stock. Macarthur covers a lot of ground. The market around Campbelltown, Leumeah and Minto is different from newer estates such as Gregory Hills and Oran Park, and different again from release areas like Appin and Menangle Park.

Yield: what the planning controls allow

Yield is often the biggest driver of value. It depends on the zoning, minimum lot size, height and floor space controls contained within the local zoning and development controls applying to the site. Campbelltown, Camden and Wollondilly councils each have their own.

Some things to keep in mind:

NSW has introduced low and mid-rise housing reforms and a Transport Oriented Development program. These have been amended since they started, so the rules have moved. Which (if either) applies is a site-by-site question. Land with a high natural hazard risk, such as bushfire or flooding, can be excluded from the low and mid-rise areas.
The Greater Macarthur Growth Area takes in the Glenfield to Macarthur renewal precincts and the release precincts south of Campbelltown, including Appin, North Appin and Gilead. Land that’s zoned and serviced is valued very differently from land still waiting on a planning proposal. A valuer needs to know exactly where a precinct sits in the process.

Construction and site costs

Construction costs should come from a quantity surveyor’s estimate or current tender-style benchmarks. They shouldn’t be a rule of thumb from a few years ago. Site constraints add to the bill. Think flooding, bushfire, biodiversity, heritage, easements, contamination and how far existing services are from the site.

Government charges

In NSW these can shift the result by a lot, and they come in layers:

State charges. The Housing and Productivity Contribution (HPC) funds state infrastructure. It’s separate from what developers pay councils for local infrastructure. The base rates are indexed quarterly. In recent quarters they’ve been around $13,000 per new residential subdivision lot and roughly $10,800 per new dwelling in medium or high-density development in Greater Sydney, so always check the current figure. A separate strategic biodiversity component applies on land covered by the Cumberland Plain Conservation Plan.
Growth-area transition. Land in the Western Sydney growth areas was excluded from the HPC until 1 July 2026. From that date it moved across to the HPC, with transitional arrangements recognising earlier payments. Which arrangement applies to a particular site needs checking.
Local charges. Councils levy section 7.11 and 7.12 contributions under their contributions plans. Councils can generally only impose up to $20,000 per lot or dwelling unless the plan has been reviewed by IPART, with a $30,000 review threshold for certain greenfield areas.
Servicing. Sydney Water and other utility charges, plus the cost of extending roads, drainage, sewer and power to the site, especially in release areas.

GST, finance and holding costs

GST treatment can change the numbers materially. It depends on things like whether the margin scheme is available and how the land was acquired. A good valuation states its GST assumptions clearly, and your accountant should confirm your actual position.

Finance and holding costs include interest, council rates, land tax and insurance, and they grow the longer approvals take.

Developer’s profit and risk

There’s no single correct margin. It depends on project size, complexity, how far approvals have progressed, presales and market conditions. The margin should be supported by evidence and clearly stated, because changing it moves the land value directly.

Residual Value vs Market Value: Why the Numbers Can Differ

A residual calculation is one tool for reaching a value, and valuers often cross-check it against direct comparison. That means looking at what similar development sites have actually sold for, where the evidence exists.

The two can differ for a few reasons:

Market participants vs one developer. A market valuation uses assumptions a typical buyer would adopt. A particular developer might have lower build costs or accept a thinner margin, and end up with a higher figure. Both are legitimate, but they answer different questions. Be clear about which one you want in your instructions.
Method. A simple static residual suits smaller, short projects. Larger staged projects, such as multi-year subdivisions, are often modelled with a discounted cash flow that accounts for timing.
Evidence. Where good comparable land sales exist, they usually carry more weight. Where they’re scarce, the residual approach carries more.

When a Development Feasibility Valuation in Macarthur Makes Sense

Before signing an option, contract or joint venture. Appin (Part) was rezoned in December 2023, and landholders around the growth-area precincts and other release areas like Menangle Park are commonly approached by developers. A development feasibility valuation Macarthur landowners commission independently gives you a benchmark before you negotiate.
When redevelopment is on the table. Owners of infill sites near stations and town centres often want to know whether to sell to a developer, partner with one, or build themselves.
When you’re the buyer. Developers and investors use one to set a maximum offer and test whether a scheme survives a price fall or a cost blowout.
When others rely on the number. Estates, partnership disputes and trust matters often need a documented, defensible figure.

One thing it isn’t: a substitute for a lender’s valuation. Banks generally instruct their own valuers, so treat a feasibility valuation as supporting evidence for your own decisions and negotiations.

Common Misconceptions

“The residual figure is what my land will sell for.” Not necessarily. The market price depends on what buyers actually pay, and that can be higher or lower.
“Approval means the value is locked in.” Consents come with conditions and don’t last forever. Contributions and costs can still change the outcome.
“A rezoning proposal means the higher value applies now.” Valuers weigh the likelihood and timing of a change, and they usually discount for that risk.
“An online calculator gives the same answer.” Calculators can’t capture site-specific issues like hazards, servicing gaps or contribution plans.

What to Gather Before You Ask for One

Certificate of title and deposited plan, plus any survey
A section 10.7 planning certificate from council
Any existing development approval, concept plans or planning proposal documents
Geotechnical, contamination, flood, bushfire or biodiversity reports, if you have them
Details of easements, covenants and servicing advice
Any quantity surveyor cost estimate
Any offer, option or joint venture terms you’ve received
The purpose of the valuation, and who will rely on it

FAQs

How much does a development feasibility valuation cost?

It depends on the size and complexity of the site and the scope of the instructions. A staged subdivision takes more work than a single infill block. Ask for a written fee proposal that sets out exactly what’s covered.

Can a site without development approval be valued on a residual basis?

Yes, but the valuer has to make assumptions about what’s permitted or reasonably likely. They’ll usually allow for approval risk and time, and sometimes present the result as a range.

Will a bank accept a feasibility valuation for a loan?

Usually not on its own. Lenders generally rely on their own instructed valuation, though a feasibility valuation can support your application.

Do property valuers in NSW have to be registered?

Not by the state any more. The Valuers Act 2003, which required NSW valuers to be registered, was repealed on 1 March 2016. Instead, look for Australian Property Institute membership or Certified Practising Valuer status, professional indemnity insurance and relevant development experience.

What profit margin should a developer use?

There isn’t a fixed percentage. It should reflect the project’s size, risk and stage, and be supported by market evidence. Your valuer should explain why they chose it.

How long does a feasibility valuation stay accurate?

It’s a snapshot. If sale prices, construction costs, planning controls or infrastructure charges shift, the residual can move quickly, so refresh it before making a major decision.

Conclusion

A development feasibility valuation in Macarthur puts a defensible number on what a site can support once you account for yield, costs, government charges and profit. Treat the result as a range built on stated assumptions, not a single definitive figure. Get the planning and GST inputs confirmed before you rely on it, and refresh the numbers if prices, costs or controls shift.

Need a second opinion on a site?

If you’re weighing up an offer, a joint venture or a redevelopment, Macarthur Property Valuers can prepare a development feasibility valuation that spells out its assumptions, so you, your solicitor and your accountant can see how the residual land value was reached. Call Macarthur Property Valuers on +61 438 080 786 for a no-pressure chat about what you need.

Development Feasibility Valuation Macarthur: How Residual Land Value Is Determined