Appraising work-in-progress: best practices for valuers

Appraising a property while it sits behind temporary fencing, surrounded by scaffolding, and filled with the dust of half-finished rooms remains one of the most demanding tasks in the valuation profession. The site looks nothing like a completed dwelling, the floor plan may change weekly, and the lender needs a number that can withstand scrutiny. For appraisers working in markets where renovations dominate sales activity, mastering the techniques for valuing work-in-progress is essential.

This challenge is particularly visible in Australian capital cities. In Sydney, the prevalence of knock-down rebuilds in inner-western suburbs means valuers regularly inspect lots where the original home has been demolished but the new build is still months from completion. Melbourne's heritage overlays encourage careful additions to period homes, while Brisbane's post-flood reconstruction continues to create a steady pipeline of partially rebuilt properties. Adelaide and Perth also see significant renovation volumes, often tied to heritage conservation or seismic retrofitting.

The complexity of these assignments has pushed professional bodies to refine their guidance. Advocacy groups representing valuers have long pushed for clearer standards, and the Appraisal Institute's ongoing professional advocacy offers a model of how industry bodies can engage with regulators to support practitioners with current methodologies. Similar advocacy in Australia falls under the Australian Property Institute, which works alongside state-based regulators to maintain professional benchmarks.

Whether the assignment involves a single residential extension, a commercial fit-out, or a multi-stage development, the principles remain similar: document what exists, measure what is missing, and reconcile the value to the market. The following sections walk through the most reliable methods for handling these complex files.

Defining the scope of work early

The first step is establishing a clear engagement letter and scope of work before stepping onto the site. This document should specify whether the appraisal will be based on as-is, as-complete, or as-proposed value, and whether the client is the owner, lender, or buyer. In Australia, the lender is often a major bank, and each institution has its own requirements for progress inspections and draw-down valuations. Clarifying these requirements upfront prevents costly re-reports.

The scope should also identify the property type, the intended highest and best use, and the relevant compliance frameworks. For residential work, this typically means checking the National Construction Code classifications, while commercial projects may require reference to the Building Code of Australia and any state-specific overlays. In New South Wales, the Building Commission NSW oversees compliance, whereas Victoria relies on the Victorian Building Authority, and Queensland properties are regulated by the Queensland Building and Construction Commission. Knowing which authority has jurisdiction informs what documentation the appraiser should request.

Measuring progress and cost-to-complete

Once the scope is locked, the physical inspection becomes the heart of the assignment. The appraiser needs to walk the site, photograph each stage of work, and note the percentage of completion across major components: foundations, framing, roofing, services, and fit-out. A useful approach is to break the project into a checklist tied to the builder's cost schedule, marking off completed items and costing the remainder.

Cost-to-complete analysis requires more than a simple subtraction. The appraiser should obtain the original building contract, any variations or change orders, and receipts for materials already supplied but not yet installed. In some Australian states, owner-builders are required to lodge insurance through iCare NSW or equivalent schemes, and these documents can be valuable for verifying work completed. For strata-titled renovations, the by-laws and any special resolutions should also be reviewed to ensure the proposed work is properly authorised.

Holding costs, developer margin, and market conditions all influence the final as-complete value. A project in a softening market may not recover its full development costs, and the appraiser should be prepared to support any market-based deductions with comparable evidence. This is where the cost approach interacts with the sales comparison approach, and disciplined judgement becomes essential.

Navigating safety, access, and compliance risks

Active construction sites present obvious safety risks. Appraisers should arrive with appropriate personal protective equipment, including hard hats, closed-toe shoes, and high-visibility vests. Many Australian builders will refuse site access without a current White Card, the general construction induction training required nationally. Scheduling inspections during quieter periods can make the visit smoother, and building a relationship with site supervisors helps secure safe access.

Beyond personal safety, the appraiser must consider compliance with the National Construction Code, local planning schemes, and any relevant state heritage overlays. In Melbourne, properties within a Heritage Overlay require permits for external changes, and an appraiser valuing a half-renovated Victorian terrace must verify that the works have the necessary approvals. Unauthorised work can dramatically affect value, and in some cases render the property uninsurable. The appraiser should document the permit status and flag any concerns in the final report.

Reading the market when conditions shift

Valuing work-in-progress is inseparable from reading the market. A renovation that makes sense in a rising market may become a financial burden in a flat or declining one. Australian markets have demonstrated this volatility, with Sydney and Melbourne experiencing sharp cycles that directly affect renovation premiums. Appraisers should anchor their as-complete value to recent comparable sales of finished properties, adjusting for the time, cost, and risk required to complete the work.

For unique properties or unusual construction types, the cost approach carries more weight, but it must still be reconciled to the market. The land value should reflect the underlying site, not the improvements, and depreciation accounting should recognise both physical wear and functional or external obsolescence. In rural contexts, seasonal land use can also influence value; some pastoral properties, much like the seasonal transhumance traditions of communities such as the Van Gujjar, see infrastructure used intensively only part of the year, and appraisers must adjust for this cyclical pattern when valuing station buildings or seasonal worker accommodation.

Comparable selection should favour sales of similar properties in similar stages of construction, where available. When such data is thin, the appraiser may need to rely on hypothetical conditions, clearly disclosed in the report, and supported by sensitivity analysis. The Uniform Standards of Professional Appraisal Practice, mirrored in Australia through the API's own code of ethics, requires that any extraordinary assumption be reasonable and properly documented.

Reporting clearly and communicating with stakeholders

The final report is the deliverable that ties everything together. It should describe the property, the scope of work, the inspection date, and the effective date of value. Photographs are essential, and a clear cost-to-complete table helps lenders and clients understand the valuation. Reconciliation between the cost, sales comparison, and income approaches should be explained in plain language, with the final value opinion clearly stated.

Communication does not end with the report. Lenders often request updates as construction progresses, particularly before releasing further draw-downs. Appraisers should establish a protocol for these re-inspections and be available to discuss the implications of variations or unexpected site conditions. For owner-occupiers undertaking renovations, the appraiser can also play an educational role, explaining how design choices and material selections influence the final value.

Maintaining accurate work files, including notes, sketches, and supporting documents, protects the appraiser in the event of a later dispute. These files are also invaluable for refining future valuation models, particularly as construction methods evolve and new building products enter the Australian market.

To discuss a complex work-in-progress file, or to connect with experienced valuers who handle these assignments regularly, reach out to the Sacramento Sierra Chapter of the Appraisal Institute through the contact details on this site. Our members welcome the opportunity to share practical insights and support colleagues facing the most demanding valuation challenges.