Nestfair.

Know what it’s worth before you offer.

The listing tells you what the seller wants. Nestfair tells you what the evidence says: the value, the likely range, the down-valuation risk, and every cost between offer and keys. Built on 31 million public sale records.

Add asking price, floor area or rent

12.8% median error on held-out sales across 24 UK areas · open data only · ~30–90s per report

What you get

One search. The evidence a buyer’s agent would gather, in about a minute.

An honest valuationA calibrated estimate with a real likely-range, not a single number pretending to be precise.
Down-valuation riskWhether the asking runs ahead of the evidence, so you know it before the lender’s surveyor does.
Every cost to completionStamp duty, legal, survey, removals and monthly bills: the real cash you need, not just the price.
The questions to askLease length, flood risk, planning next door, the diligence a good buyer’s agent would raise on this place.
The area in numbersNearest good schools by distance, crime, live planning applications, flood designations.
Your document packExactly which papers to gather and chase, tailored to the property, ticked off as they land.

This is what comes back

66B Northcote Road, London SW11

Northcote · Wandsworth · London

£1,334,593indicative value · Lower confidence
£1.22M to £1.57Mmost likely range
756comparable sales used
Ask before you offerNo energy certificate on file

You can’t legally market a home without one, so ask the agent where it is.

How it works

Built by a former property valuation modeller, on the techniques behind professional automated valuation models.

Repeat-sales indexEach past sale of the property is re-priced to today with a local house-price index. It’s the same backbone a lender’s AVM runs on.
Nearest-neighbour comparablesThe closest recent sales by location, size, type and date, each weighted by how similar it is to your property rather than lumped into a postcode average.
Calibrated confidenceThe likely range is set from measured back-test error for this kind of property, so it reflects the real uncertainty instead of a decorative band.

12.8% median error on held-out sales across 24 UK areas, built entirely on open Land Registry and EPC data you can trace back to source.

sources: HM Land Registry · EPC register · UK HPI · police.uk · planning.data.gov.uk
Built by a former property valuation modeller · A Nestfair product · © 2026 Arvorithm Labs Ltd · company no. 17376192