Property Valuation API UK
Instant automated property valuations for any UK UPRN. The Homedata AVM API uses comparable sold prices, EPC floor area data, and local price trends to return estimated sale value, rental value, price per sqm, and a confidence score. No manual appraisal required.
What the API returns
Estimated sale value
Point estimate and ±range for current market value
Estimated rental value
Monthly rental estimate for BTL yield calculations
Price per sqm
Value per m² vs area average — flag under/over-valued properties
Confidence score
0–1 score reflecting comparables density
Comparable evidence
Top 6 comparable transactions used in calculation
As-at date
Timestamp for the valuation — re-run to get updated estimates
Quick start
curl -H "Authorization: Api-Key YOUR_API_KEY" \
"https://api.homedata.co.uk/api/valuations/estimate/?uprn=100023336956&bedrooms=3&property_type=Terraced&type=sale"{
"estimate_gbp": 495000,
"range_low_gbp": 470000,
"range_high_gbp": 520000,
"confidence": { "level": "high", "comparable_count": 6 },
"method": "price-per-sqft",
"sold_comparables": [],
"active_listings": []
}FAQ
What geography does the valuation API cover?
England and Wales. Scottish properties return a partial response where Land Registry comparable data is available.
How often should I re-run valuations?
Monthly re-runs are sufficient for most portfolio monitoring use cases. Valuations are point-in-time and do not auto-refresh.
Does the API support commercial property?
No — the AVM model is trained on residential transactions. Commercial property requires specialist valuation.