Raw Land with Development Potential: A Highest and Best Use Analysis

Raw land sitting on the edge of a growing Australian town looks deceptively simple from the kerbside. A paddock near the M1 at Worongary, a former grazing block outside Wodonga, or a few hectares of cleared country near Mount Barker all share a quiet promise. The appraiser is paid to read that promise carefully, weigh the constraints, and arrive at a supportable opinion of value.

In Australia, the analysis sits at the intersection of state planning schemes, infrastructure contributions, and the rhythm of how our cities grow outward. Greenfield releases in Sydney's north-west, redevelopment pressure around the Sunshine Coast, and industrial expansion near Geelong have created a steady pipeline of sites where the question is not what the land is worth today, but what it will be worth once a permit is in hand.

The classic four-test framework remains the foundation, but the inputs look quite different on this side of the Pacific. An Australian valuer reads a planning scheme map, scans for overlays such as biodiversity, heritage, or bushfire management, and checks the relevant infrastructure charges schedule. The same disciplined thinking applies; the paperwork just has a different name on the cover page.

This article walks through the practical steps of analysing raw land with development potential in an Australian setting, drawing on the kind of assignments handled by members of the Sacramento Sierra Chapter of the Appraisal Institute who, through their work with the broader the Appraisal Institute's Young Professionals Group: Opportunities for New Appraisers, regularly compare notes with peers facing similar assignment questions.

Grounding the analysis in local planning reality

Before any number is calculated, the highest and best use conclusion must reflect what is legally permissible, physically possible, financially feasible, and maximally productive. The first test is where most disputes arise, and it is the test most shaped by local council policy. A parcel near Pimpama may be zoned for low-density residential under the City of Gold Coast Planning Scheme, but an emerging neighbourhood centre designation in an adjoining precinct can change the redevelopment story.

In regional centres such as Tamworth or Warrnambool, the planning pathway is often more about the local strategic growth plan than a single zone label. A 20-hectare parcel may sit in a rural living zone today, with the regional strategy flagging it as a future urban investigation area. The appraiser must decide whether to treat that as a near-term redevelopment play, a long-dated landbank, or a rural holding with uplift optionality.

Physical constraints such as slope, flood overlay, or acid sulfate soil in low-lying coastal land near Pambula on the NSW far south coast can rule out conventional residential yield. Financial feasibility in a high-infrastructure-charge environment, such as a greenfield release in outer western Sydney, may push the conclusion away from standard residential subdivision and toward something denser.

Reading the four tests through an Australian lens

Legal permissibility in Australia is rarely a binary answer. Land may be zoned for a use, but a restrictive covenant, a state environment protection policy, or an Aboriginal cultural heritage overlay can erode the practical development envelope. A Brisbane block might be coded low-medium density residential yet carry a koala habitat overlay that triggers a state assessment and pushes the approval timeline out by twelve months.

Physical possibility covers the more obvious ground: frontage, access, slope, and services. A battle-axe block tucked behind a heritage dwelling in Fremantle may technically be developable, but the access width and demolition cost often rule out a viable project. Appraisers should also consider the 1-in-100-year flood level, the bushfire attack level (BAL) rating under AS 3959, and any saline or reactive soil issues that a geotech report might later reveal.

Financial feasibility is where the Australian market shows its strongest personality. Land prices in western Sydney, the Moreton Bay region, and Melbourne's western corridor have run well above replacement cost, so feasibility hinges on density bonuses, floor space ratios, and the willingness of the local council to support a non-compliant but well-designed scheme.

Inspecting the site and the physical evidence

A desk-based highest and best use is rarely enough. Appraisers handling development sites should walk the boundary, photograph the frontage, and note the location of existing services. A site on the edge of Bendigo or Ballarat might look uniform on the title, yet a closer look can reveal a railway reserve, drainage easement, or transmission line easement that materially affects the developable area.

Soil, slope, and hydrology often require professional input. A slope greater than 1-in-6 across more than 30 per cent of a site may trigger a geotechnical slope assessment under most state planning schemes, adding both cost and time. Sites within a flood overlay in places like Nambour or Casino can require fill, detention basins, or elevated slab construction that erodes the residual dollar for dollar.

Access is another quiet constraint. A property with a 6-metre sealed road frontage is rarely a candidate for a 20-lot subdivision, regardless of zoning, and a site relying on a right-of-carriageway can stall at the due diligence stage.

Comparable evidence and the method of comparison

The direct comparison approach is the workhorse of raw land appraisal, and the depth of the sales evidence set often determines the credibility of the report. In Australia, developers and their financiers expect a tight comp set, with adjustments for zoning, frontage, slope, services, and timing. Without a careful read of the planning reforms between transaction dates, even two sales in the same locality can be hard to compare.

Recent sales with similar uplift tend to cluster around rezoning announcements. A decision to fast-track a precinct around the new Western Sydney Aerotropolis, or to rezone land near the Suburban Rail Loop, can lift comparable prices by 15 to 25 per cent within months. The appraiser's job is to distinguish between evidence that reflects a firm planning outcome and evidence that captures only a hopeful headline. Where direct sales are thin, appraisers lean on the hypothetical condition: value the site "as if rezoned and serviced," then discount for the holding period, rezoning risk, and infrastructure cost. The discount rate should reflect the level of planning certainty, and the holding period should match the realistic DA and construction timeline, which in a major capital can stretch to three or four years from acquisition to first settlement.

Cost, time, and the feasibility envelope

Raw land valuation is unusually sensitive to holding cost assumptions. Council rates, land tax in states where it applies on undeveloped land, fencing and maintenance, and the interest carry on the acquisition all erode the residual.

Infrastructure contributions are a wildcard. In Queensland, the State Infrastructure Charge under the Planning Regulation 2017 can add $35,000 or more per standard residential lot. In Victoria, the Development Contributions Plan overlay can add a similar amount, while the NSW inclusionary zoning pilot in certain precincts requires a percentage of affordable housing that further compresses the residual.

Time is the other quiet killer. A DA lodged with a regional council in a shire like Bega Valley or South Gippsland can sit in the system for twelve to eighteen months before a decision, and appeals can add another layer. The valuation must reflect the realistic time to approval. Setting a holding period that is too short flatters the residual; setting it too long can make a feasible project look uneconomic.

Ethics, disclosure, and the professional standard

The opinion-driven nature of highest and best use makes the disclosure narrative especially important. Appraisers must state the assumptions, the zoning relied upon, the planning scheme version used, and the date of the planning certificate. If the conclusion depends on a hypothetical rezoning, that condition must be flagged in the report's executive summary and the reconciliation section.

Conflict-of-interest management is equally critical. An appraiser who has previously valued the same site for a different client, or who sits on a committee advising the council on a growth strategy, must disclose that prior involvement. The Sacramento Sierra Chapter's resource on How to Handle Disclosures and Conflicts of Interest in Appraisal Work is worth revisiting before each assignment.

The report should finally distinguish between current use value, market value subject to a hypothetical condition, and the value as if complete. Each figure has a legitimate use, and a sophisticated reader will look for the assumptions that sit behind each.

If you are working on raw land assignments in Australia and would like to deepen your highest and best use toolkit, the Sacramento Sierra Chapter of the Appraisal Institute welcomes your enquiries about membership, designation pathways, and the upcoming continuing education calendar. Reach out to the chapter office to register for the next live workshop, access the journal archive, or connect with a mentor with greenfield experience.