A number you can trust.
Buying or selling — photo-aware AI prices the home as it actually is, not the postcode average. Your price bracket, free in about 30 seconds. The exact figure, the range and the comparables: 99p.
Reads the photos. Garden, condition, kerb appeal — scored by AI, not assumed.
Hyperlocal. Priced against live listings on streets like yours, pulled at the moment you ask.
Honest range. Every estimate ships with its 90% confidence interval and fit score.
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Starting your valuation…
How to model an improvement's value uplift
Wondering what an extra bedroom, a loft conversion, an extension or a refurbishment would add to your home? Run the valuation above, unlock the full report, then use the Scenario Explorer on the result card.
- Get your price bracket, then unlock the full report. Postcode + a few details: the bracket is free in about 30 seconds, and the full report — with the exact figure and the Scenario Explorer — is 99p, one-off.
- Open the Scenario Explorer. On the result card — sliders for bedrooms, bathrooms, floor area, garden size and interior condition.
- Move the slider for your improvement. Loft conversion or extension that adds a bedroom: bedroom slider +1 and floor-area slider +20–30 m². Refurbishment: condition slider up one or two tiers. Extra bathroom: bathroom slider +1.
- Click Recalculate. Offrly re-prices the same property against the same live UK comparable set. The £ delta is your modelled uplift for that change on that specific home.
- Compare scenarios. Reset to original between runs. Pair the modelled uplift against a builder or quantity-surveyor cost estimate before committing.
Frequently asked questions
Is Offrly's property valuation free?
The price bracket is — free in about 30 seconds, with no sign-up: the estimate's first digit and scale, with a preview of the evidence. The full report is an optional 99p, one-off: the exact figure and its 90% range, the comparable listings the estimate was priced against, recent sold prices nearby, the area price heatmap and the Scenario Explorer, with a private report link to save, share or print. No subscription, no phone number needed, and once you've bought it, re-running the same property within 30 days includes its full report at no extra cost.
How does the Scenario Explorer work?
It's part of the full report. Below your valuation, sliders for bedrooms, bathrooms, floor area, garden size and interior condition let you ask "what if"; each Recalculate re-prices the same property against the same live UK comparable set with the perturbed inputs — the delta is the modelled uplift for that change on that specific home. Sliders are clamped within ±2 bedrooms, ±2 bathrooms, ±50% floor area, ±2 garden tiers and ±2 condition tiers from the original valuation.
Can I see how much an extra bedroom or extension would add to my house?
Yes — that's exactly what the Scenario Explorer in the full report is for. Run a valuation (your price bracket arrives free in about 30 seconds), unlock the full report (99p), then drag the bedroom slider up by one for an extra bedroom, or the floor-area slider up by 20–30 m² to model a loft conversion or extension. Click Recalculate; the modelled new price appears with the £ delta against your original valuation.
How accurate is the modelled Scenario Explorer uplift?
The Scenario Explorer uses the same regression-based pricing on photo-aware, micro-neighbourhood-aware comparables that produced the original valuation — just with the perturbed inputs. It is an indicative market estimate of how the change would price against today's live UK comparable set, not a guarantee. Build cost, condition of the rest of the house and post-completion buyer-panel reactions are not modelled.
What inputs does an Offrly valuation need?
A UK postcode plus a few property details — bedrooms, bathrooms, property type, tenure, garden size and interior condition. Optionally a Rightmove URL, in which case Offrly extracts most of the details and reads the property's photos for garden and condition. About 30 seconds end to end.
Can an online valuation replace a RICS survey?
No. A RICS survey is a regulated, physical inspection of a specific property by a qualified surveyor. Offrly produces an indicative market estimate, not a regulated valuation. For mortgage, insurance, probate, tax or legal purposes, use a RICS-qualified surveyor.
What does the Scenario Explorer NOT model?
It models how today's live UK comparables price your home with the perturbed inputs. It does not model build cost, planning risk, the timing impact of a renovation, the condition of the rest of the house when you add an extension, or post-completion buyer-panel reactions to specific finishes. Pair the modelled uplift with a builder or quantity-surveyor cost estimate before committing.
How often is the comparable data refreshed?
Every valuation pulls live UK comparable listings at the moment you ask — nothing is cached from last week. The Scenario Explorer reuses the comparable set from your most recent valuation so the modelled uplifts are calibrated to the same data.