Don’t trust our numbers. Test yours.
Instant UK Property Valuations
for lenders, portfolio managers and property professionals
The only automated valuations benchmarked against real Land Registry sales.
£9.95 down to £0.20 per valuation
Fitch Band B
Headline accuracy is reported on standard market sales (Land Registry Category A) — 266,525 of 295,026 sales in the H2-2025 bulk test. All figures against actual Land Registry sale prices. Gadsden Meridian v6.13. Full basis & blended figure.
Gadsden valuations are statistical estimates with a stated margin of uncertainty — not formal (RICS Red Book) valuations.
Why lenders use Gadsden
The case for automated valuations isn’t just accuracy or price alone. It’s the combination.
Accuracy
67.4% within ±10%
Benchmarked against actual Land Registry sale prices — not surveyor estimates or asking prices. For Band B valuations (FSD ≤ 0.10), 70.4% fall within ±10%.
6.4% median error. H2-2025 bulk test of 295,026 Land Registry transactions. Full methodology published on our Accuracy page.
Price
£9.95 down to £0.20
Valuation bundles from £9.95 down to £0.20 per valuation. Free blind backtesting. No subscription, no expiry.
Upload up to 250 recent completions — transactions our model has never seen. We value each as of today. Free, no commitment.
Lender Ready
Built for regulated lending
Documentation built for SS1/23 vendor due diligence. Per-property confidence scoring. Full audit trail. Designed to sit in your valuation cascade.
Transparent, explainable valuations with full comparable evidence. Not a black box. Compliance details.
How lenders are using automated valuations
AVM alone
When the loan is well-cushioned, the accuracy is more than sufficient. Instant, at a fraction of the cost of a physical inspection.
AVM as a second opinion
Two independent data points for the cost of one traditional valuation plus pennies. If they agree, confidence is high. If they diverge, that’s the signal to investigate.
Surveyor-led, AVM-assisted
The surveyor signs it off. The AVM gives them instant context — comparables, local pricing, whether the figure is in the right ballpark.
Independent cross-check
An independent low-cost second opinion for higher-risk or high-LTV cases, or as a matter of routine to validate your existing valuation provision.
Measured against the hardest benchmark
We test against the actual Land Registry sale price — not surveyor estimates. A tighter, taller curve means more valuations land close to the real price.
* Hometrack benchmarks against surveyor valuations, not actual sale prices — a less demanding test.
Who uses Gadsden Valuations
Mortgage Lenders
Origination screening, portfolio monitoring, and retrospective revaluation. Built for lender model-risk due diligence — published accuracy metrics, FSD confidence bands, and full audit trail.
View accuracy metrics →Asset Managers
Portfolio revaluation, Basel 3.1 preparation, and mark-to-market reporting. Batch upload via CSV or API for high-volume portfolio assessment with per-property confidence scoring.
API documentation →Property Professionals
Broker price opinions, quick comparable checks, and due diligence support. Instant valuations with comparable evidence and feature contributions for professional reporting.
See sample reports →Three steps to a valuation
Enter address
Type a postcode, select the property from the list. We match to our database of 41.6 million UK properties.
Get valuation
Our LightGBM model analyses 49 features including comparable sales, location, property characteristics, and market trends.
Download report
Professional PDF report with confidence scoring, comparable evidence, feature contributions, and methodology disclosure.
See the report before you buy
Download a real valuation report generated by our model. No sign-up required.
Transparent pricing
Valuation bundles: £9.95 down to £0.20
Free blind backtesting
No subscription, no expiry
Built on authoritative data
Sources include: HM Land Registry Price Paid Data, MHCLG Energy Performance Certificates, ONS House Price Index, Ofsted, Environment Agency, ONS Census.