For homebuyers
Published 6 April 2026 · 6 min read
Most UK buyers rely on gut instinct, a quick portal estimate, or a friend's opinion to judge whether a property is overpriced. The problem: these shortcuts miss the data that actually matters. The good news: that data is all publicly available — it's just scattered across seven different government websites and near-impossible to interpret without expertise.
This article explains the 7 data points that determine a fair price for any UK property, where to find each one, and why they matter more than the asking price alone.
Portal estimates are averages. The most reliable baseline is what similar properties on the same street or postcode actually sold for. Look for sales within the last 12 months for properties of the same type (terraced, semi, flat) and approximate size. This is your anchor.
Where to find it: HM Land Registry records every completed sale in England and Wales (the portals also show a property's "sold" history). "Comparable" means the same property type, roughly the same size and condition, ideally on the same street or within about a quarter-mile, sold in the last 12 months. If the only sales are older, nudge them for how prices have moved since.
A 3-bed selling for £350,000 next to another 3-bed at £280,000 isn't necessarily overpriced — one might be 1,100 sq ft and the other 750 sq ft. Always convert to price per square foot before comparing. EPC certificates include floor area for most UK properties.
Where to find floor area: the EPC certificate lists it for most UK homes (free from the government's EPC register). Divide price by floor area to get £ per square foot, then compare like with like. A home priced well above the local £/sqft for its type, with no obvious reason, is a flag worth questioning.
An EPC rating describes a property's assessed energy efficiency. It does not tell you how much a particular household will spend or which upgrades are required. Read the property's actual EPC recommendations and consider its condition before making assumptions about bills or work.
The government's EPC register provides certificates and recommendations. Before budgeting for upgrades, check the recommended measures, likely use and running-cost assumptions, whether the work is feasible for the property, and property-specific quotes. A rating alone is not a fixed cost or a reason to assume a price discount.
A Flood Zone 2 or 3 location is a reason to investigate the property's flood exposure. The zone alone does not establish damage risk for a particular home, its insurance premium, mortgage terms or whether the asking price is too high.
Use the government's flood maps as a starting point, then check the property's position and any mitigation, actual insurer and lender terms, and recent comparable sales. Consider these findings together; do not infer a price discount from the zone alone.
Properties within a sought-after school catchment may attract a premium. The effect varies by location and school, so check local sold-price evidence rather than assuming a fixed percentage. If your comparables are inside the catchment and the subject property is outside it (or vice versa), account for that difference before relying on the comparison.
How to check: Ofsted ratings (Outstanding, Good, and so on) are public, and catchment areas decide which homes feed which schools. If your comparables sit in catchment for a strong school and the subject property doesn't — or the reverse — your price comparison is skewed and needs adjusting.
Public crime records include street-level statistics. High burglary or violent crime rates don't always depress asking prices — but they affect liveability and resale value. Check the 12-month trend, not just a single month.
How to read it: Police.uk publishes street-level crime by month. Look at the 12-month trend, not a single spike, and weight the types that affect liveability and resale (burglary, anti-social behaviour) over rare one-offs. High local crime doesn't always show in the asking price — but it shows up when you come to sell.
A £300,000 property needing £60,000 of work is effectively a £360,000 property. Kitchens, bathrooms, roofs, windows, electrics, and boilers all have market-rate replacement costs. Factoring these in before you negotiate can save you from an offer you'll regret.
How to gauge it: kitchens, bathrooms, roofs, windows, electrics and boilers all have rough market replacement costs — add them up before you negotiate. Listing photos hint at the work (a dated kitchen, damp marks, an old fuse box). If the total looks large, that's the moment to budget for a full survey, not after you've offered.
Every one of these data points is publicly available. The frustrating reality is that they live in different places — transaction records, energy records, flood maps, school context, crime maps, and council tax bands. Cross-referencing them for a single property takes 2–3 hours if you know what you're doing, and most buyers don't.
That's before you get to the interpretation — understanding how flood risk or poor energy efficiency may affect a property's value. The effect varies by property; check local sold-price evidence, likely costs, and your surveyor's advice rather than applying a fixed discount.
DeedSight helps you review available property evidence before deciding what to check next. Coverage varies by address, and some checks may be unavailable. A scan does not replace a survey, a lender's valuation, or professional advice.
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