HussnanStrategic Advisory
Development Appraisal EngineResidual Land Value · London & South East
Appraisal mode
Profit hurdle

① Upload documents — auto-build the appraisal

Upload the decision notice (conditions, CIL/S106/BNG/SANG, risks) and the approved drawings (GIA → build cost, NIA → GDV). The analyser reads them and populates the model below. Nothing is fabricated — anything unevidenced is flagged.
Decision notice (PDF)
Drawings — floor plans, elevations, site plan (multiple)
Upload all sheets together. Floor plans (with a schedule or dimensions) are what yield GIA & NIA — an elevation alone cannot.
Schedule of accommodation / area schedule
Best source for areas. Per-unit NIA → GDV; a stated GIA → build cost. If it gives NIA only, GIA is derived via the efficiency slider and flagged.
Residual land value
at target profit
Profit
GDV less total cost
Profit on cost (POC)
profit ÷ GDC
Return on equity
annualised —

Residual appraisal

GDV → build → finance → profit → residual land value. Profit on GDV .

Capital stack

Two-tranche only — senior development debt at 67.5% LTC (land + construction + fees), balance as sponsor equity. No mezzanine.

Unit schedule

GDV and net saleable area are driven by this schedule. £/sqft here is the base — the GDV adjustment slider flexes it live.
Unit typeNo.Size (sqft)£ / sqftGDV
Total

GDV evidence

Primary source: HM Land Registry price-paid data (verified, per-transaction). Sold comparables only — not asking prices. Rightmove publishes street-level pages, not per-transaction permalinks — use only as an indicative street/area link with a clear note. Flag any address that cannot be linked directly rather than forcing a link. Never fabricate: where a figure is unevidenced, leave it as a placeholder and flag it.
AddressBedsSqftSold ££/sqftDateSource
Land Registry records the sold price but not floor area — enter sqft per comparable (from EPC, marketing particulars or measurement) to derive £/sqft.

Sensitivity 1 — GDV × build cost (POC)

Profit on cost at the currently displayed land value, flexing GDV/sqft (rows) against build cost £/m² (columns), ±10%. ≥20% 15–20% <15%

Sensitivity 2 — land price × GDV (POC)

Profit on cost flexing land price (rows, ±10% of the displayed land value) against GDV/sqft (columns, ±10%). Isolates how much viability headroom the land price is carrying. ≥20% 15–20% <15%

Planning & risk register

Charging authority, affordable housing policy, S106 heads of terms and any policy conflicts. Red-flag anything that threatens the residual. Always study the approved plans and the decision notice conditions.
Charging authority: Affordable: Build £/m²: £2,750 residential-led Target: 20% GDC / 17.5% GDV

⚡ Intelligent auto-fill (phase 2)

The next upgrade wires a Claude call behind this dashboard to auto-populate borough GDV/sqft benchmarks, BCIS build ranges, CIL rates for the charging authority, sold comparables with sources, and to flag Local Plan policy conflicts — the "intelligent" tier. The engine above already does all the deterministic maths live.