What development lenders actually test in your appraisal

Development finance credit teams read appraisals for a living, and they discount optimism on sight. Understanding what they test lets you build the appraisal to survive it — and borrow on better terms.

1. GDV evidence quality

Not the number — its provenance. Sold comparables (not asking prices), locality, recency or proper indexation, and like-for-like product. A GDV backed by a page of traceable comps gets accepted; a bare number triggers a downvaluation by the lender's own surveyor.

2. Profit margin

Most senior lenders want to see roughly 17.5–25% profit on GDV (or its profit-on-cost equivalent). Below that, the scheme has no buffer and the loan gets declined or repriced. If your residual only works by shaving margin, the land price is wrong.

3. Sales rate

Your assumed absorption drives the facility term and interest cost. Evidence it from nearby schemes' actual completion rates rather than asserting it — a lender's monitoring surveyor will.

4. Sensitivity

They will knock 5–10% off GDV and add 10% to build costs and see if the deal still washes its face. Run the same tests first and present them: an appraisal that shows its own downside case reads as competence.

5. Exit realism

Unit pricing vs local mortgage affordability, incentives assumptions, and what happens if the tail of the scheme sells slowly. Schemes stall at the last 20% of units; lenders know it.

An appraisal that arrives with indexed comparable evidence, measured local absorption and visible sensitivity — Threshold's output, essentially — starts the credit conversation several rungs higher.

Data referenced in Threshold is displayed under the Open Government Licence (HM Land Registry Price Paid Data, EPC Register, ONS, UK HPI). All figures produced by Threshold are statistical estimates for site appraisal, not RICS valuations.