Automated Property Valuations for UK Professionals

Machine learning valuations trained on 8.4 million Land Registry transactions. England & Wales • Detached • Semi-detached • Terraced • Flats

7.8%
Median error (MdAPE)
60.2%
Within ±10% of sale price
85.3%
Within ±20% of sale price
8.4M
Training transactions

How Accurate Are We?

Benchmarked against actual Land Registry sale prices — not surveyor estimates or asking prices.

Asking prices vs sale price ~15%
Rightmove / Zoopla
RICS surveyor vs sale price ~10%
Physical inspection
Hometrack vs surveyor value ~8%
Market leader (est.) — benchmarked against surveyor valuations, a softer test
Gadsden Valuations vs sale price 7.8%
AVM (our model, v6) — benchmarked against actual Land Registry completion prices

Accuracy by Segment

v6 model, 295,026 test properties (transactions after July 2025)

By Property Type

Type MdAPE PE10 Count
Semi-Detached7.2%63%87,931
Detached7.6%61%63,698
Terraced7.8%60%94,834
Flat9.2%54%48,563

By Price Band

Band MdAPE PE10 Count
£300K–£500K6.8%66%87,005
£150K–£300K7.2%63%115,433
£500K–£1M8.1%59%39,915
Under £150K11.8%44%46,746

Who Is This For?

Mortgage Lenders

Origination screening, remortgage, Basel 3.1 portfolio revaluation

Surveyors & Valuers

Desktop review support, independent cross-check, bulk audits

Brokers & Conveyancers

Pre-application price checks, indicative valuations

Property Investors

Deal screening, portfolio monitoring, acquisition due diligence

Pricing

Pay per valuation. No subscription. No contract. Purchase credit bundles.

Bundle Price Per Valuation Credits
Single£9.95£9.951
Starter£79£7.9010
Professional£299£5.9850
Portfolio£899£4.50200
Enterprise£1,999£4.00500
Enterprise & APICustomContact us

For technical detail on our methodology, features, and regulatory alignment, see our Technical Summary.

Common questions

Is there a free trial?

We do not currently offer free valuations. Our accuracy metrics are published transparently so you can assess quality before purchasing — and here is a sample report so you can see exactly what you get.

Download this overview

Get a branded PDF version of this page to share with colleagues.

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All accuracy figures from walk-forward testing on 295,026 properties not seen during training (post-July 2025 transactions). Benchmarked against Land Registry completion prices.

gadsdenvaluations.com • [email protected]