How can developers review historic appraisals?

Developers should review historic appraisals by comparing the old decision, its assumptions and its source evidence against current planning, ownership, market and technical conditions. The aim is not to rebuild every appraisal from scratch. It is to identify the delta: what changed, what stayed the same and whether the original conclusion still holds.

How This Works

A historic appraisal review begins with the old appraisal pack. The team should identify the date, author, appraisal model, decision, rejection reason, source list and open questions. If the record only says “not viable” or “planning too hard”, the first task is to reconstruct what that meant.

The second step is to compare the old assumptions with current evidence. Policy may have changed. A new local plan may be in progress. Ownership may have shifted. Build costs, sales values, abnormal assumptions or affordable housing requirements may have moved. The review should isolate which changes affect the decision.

Worked Example

Illustrative example: a housebuilder rejected a 40-unit site in 2023 because the residual land value was too low and the authority had a strong housing-supply position. In 2026, the team reviews the old appraisal after updated housing-supply evidence and comparable sales data change the context.

The new review does not restart the full appraisal immediately. It checks whether the affected assumptions are large enough to justify planner input, landowner contact and a refreshed viability run.

Review Method

1. Extract the old decision and key assumptions. 2. Identify the original evidence and its date. 3. Check current planning, ownership, constraints and market inputs. 4. Highlight changed assumptions only. 5. Record a new decision owner, action and review date.

Sources Used

• Historic appraisal model and decision note. • Local planning authority evidence base. • GOV.UK planning practice guidance. • National Planning Policy Framework. • HM Land Registry where ownership is relevant. • Internal comparable evidence and professional valuation inputs.

Limitations And Professional Review

AI can help compare records, but it cannot guarantee the commercial or planning conclusion. Old files may be incomplete, assumptions may be undocumented and source coverage may vary. A qualified professional should review valuation, legal, planning and technical judgements before action is taken.

Where Harold Land Fits

Harold Land site appraisal and monitoring workspace helps developers keep old appraisals connected to current evidence. The goal is to make firm memory usable instead of leaving paid-for knowledge to decay in inboxes, drives and spreadsheets.