When you see an asking price on a Rightmove listing, you're looking at a number a seller and their estate agent chose — not a valuation. It may be based on a professional opinion of market value. It may be based on what the seller needs to clear their mortgage and chain. It may be based on what their neighbour got three years ago in a different market. Or it may simply be aspirational.
Land Registry Price Paid Data records every residential sale in England and Wales at the price it actually transacted — not what it was listed for. When you compare asking prices to eventual sale prices, a consistent pattern emerges: properties regularly sell below their initial asking price, particularly in slower markets. For buyers who can identify the gap and offer accordingly, this represents real money.
Here are seven concrete ways to check whether a UK property is overpriced before you make an offer.
1 Check what similar properties have actually sold for
The most reliable indicator of a property's value is what comparable properties in the same area have recently sold for. This is not the same as what similar properties are currently asking — listings are aspirations, completions are facts.
How to do it:
- Search HM Land Registry's Price Paid Data (free at gov.uk) for sales in the same postcode and street over the past 12 months
- Also search Rightmove and Zoopla's sold price sections — these pull from the same Land Registry data and are faster to navigate
- Look for properties of the same type (detached, semi, terrace, flat), roughly similar size, in the same street or immediate vicinity
- Note the sold dates: sales from 2 years ago in a different interest rate environment are much less useful than sales from the past 6 months
If the asking price is meaningfully above the range of recent comparable sales — say, 8–10% or more without an obvious reason (major renovation, significant size difference) — that is a strong signal of overpricing.
2 Calculate price per square metre and compare
Asking prices are sometimes set without reference to floor area, which can mask significant overpricing. A 70 sqm flat listed at £420,000 is asking £6,000 per sqm. If comparable flats in the same postcode have sold at £5,000–£5,200 per sqm, the asking price is roughly 15–20% above comparables on a per-area basis.
Where to get floor area data:
- The government's EPC register (find.energy-certificate.service.gov.uk) shows floor area for most properties with an EPC lodged. This is free and covers the vast majority of UK homes.
- Some estate agent listings include floor plans with measurements — add these up manually if needed
- Rightmove property pages often include a square footage figure; check if it matches the EPC register (some agents use gross internal area, some use net)
Once you have the floor area, divide the asking price by the floor area in square metres to get price per sqm. Do the same for your comparable sales. The gap, if any, tells you a lot.
3 Check the EPC rating and factor it into value
Energy efficiency is increasingly priced into UK property transactions — both by buyers who understand the running cost implications and by lenders who offer green mortgage products with preferential rates to energy-efficient properties.
Research by Halifax found that properties rated EPC-A or B sell for an average of 12–14% more than equivalent EPC-D properties in the same area. A property with an E, F, or G rating faces a narrower buyer pool, higher running costs, and potentially mandatory retrofit costs to meet future minimum standards (the government has signalled that rented properties will need to hit EPC-C by 2028, which could affect investment buyers).
If the property you're considering is rated D, E, or F, and the asking price appears to be set as if it were rated B or C, the asking price likely doesn't fully account for this. Look at what similarly-sized properties with B or C ratings in the same postcode have sold for, and apply a discount.
Practical check: Search the property address on the government EPC register. If no EPC exists, that's often a red flag in itself — properties frequently have no EPC when the seller doesn't want buyers to know the rating. You can also check previous EPCs if the property has changed hands before.
4 Look at how long it's been on the market
Time on market is one of the clearest signals of mispricing in residential property. A well-priced property in a reasonably active market will receive an offer within 30–60 days in most parts of the UK. If a property has been listed for 10, 12, or 16 weeks without going under offer, one of two things is true: either something about the property is deterring buyers (a structural issue, difficult access, noise, planning restrictions), or it's priced above what the market is willing to pay.
How to check:
- Most portal listings show when the property was first listed. On Rightmove, look for "Added on" date. On Zoopla, check the property history tab.
- Zoopla's price history section shows any previous asking prices — if the price has been reduced one or more times, the original asking price was too high. Check whether the current price still fully reflects market value, or whether further reduction is needed.
- If the property was previously listed under a different estate agent, the total time on market will be longer than the current listing date suggests. Search for the property address to see previous listings.
A property sitting unsold at 90 days is likely overpriced by at least 3–5%. The longer it sits, the greater the implied discount the market is demanding.
5 Review the planning history and any restrictions
Planning history can affect both what you can do with a property and what it's worth. A property subject to an Article 4 direction (which removes permitted development rights in conservation areas), or one with a restrictive covenant that limits use or modification, is worth less than an equivalent unrestricted property — even if neither is reflected in the asking price.
What to check:
- Planning applications: Local councils publish all planning applications and decisions. Search by address on the council's planning portal (accessible via the planning.data.gov.uk national dataset).
- Permitted development restrictions: Properties in conservation areas may require full planning permission for extensions, loft conversions, or alterations that elsewhere would be permitted development. This affects both what you can do with the property and what future buyers will be willing to pay.
- Refused applications: If a previous owner applied for planning permission for an extension and was refused, that tells you something important about what the property is likely to achieve — and should factor into your valuation.
- Nearby planning applications: A live application for a large development behind the property is a material factor that may not be disclosed by the agent and will significantly affect the property's desirability.
6 Check flood risk and environmental factors
The Environment Agency's flood risk maps (flood-map-for-planning.service.gov.uk) show whether a property is in a flood risk zone. Properties in Flood Zone 3 (highest risk) face higher insurance premiums, mortgage restrictions, and a smaller pool of willing buyers — yet asking prices don't always reflect this.
Other environmental factors that can affect value and are not always priced in by sellers:
- Ground stability: Properties in areas with a history of subsidence, mining, or chalk dissolution are at higher structural risk. Check the British Geological Survey data.
- Noise: Properties within 2–3km of a major road, railway, or flight path have lower average values than equivalent properties in quiet areas — but the magnitude varies. Google Maps satellite view plus Noise Map England (data.gov.uk) can help quantify this.
- Radon: In certain regions of the UK (Devon, Cornwall, parts of the East Midlands), radon gas is a significant consideration. High radon properties require mitigation measures that cost £1,000–£3,000 and may deter some buyers.
If any of these factors apply and the asking price appears not to reflect them, that gap represents overpricing.
7 Get an independent analysis of fair value
Pulling together the above data points — comparable sold prices, price per square metre, EPC adjustment, time on market, planning factors, flood risk — and synthesising them into a documented fair value estimate is exactly the work a buying agent or chartered surveyor does before advising a client on what to offer.
OfferHound automates this process. Paste any Rightmove or Zoopla URL and the report returns:
- A waterfall valuation showing the comparable baseline, adjusted for EPC, market conditions, and time on market
- The specific comparable sold prices used, with dates and addresses
- Flood risk and EPC data for the property
- A documented negotiation strategy based on the findings
It won't replace a physical survey — a surveyor who visits the property can assess condition in a way no data service can. But for assessing whether the asking price is credible before you invest in a survey, it's the most efficient starting point.
Red flags summary
- Asking price is 8%+ above comparable sold prices in the same street
- Price per square metre is significantly above the area average
- EPC rating is D, E or worse — but no discount reflected in asking price
- Listed for 90+ days with no accepted offer
- One or more price reductions already made
- Restricted permitted development rights (conservation area, Article 4)
- In Flood Zone 2 or 3 with no price adjustment
- No EPC available at all
If you're seriously considering a property, OfferHound will pull the comparable analysis, EPC rating, flood risk, and planning data — and show you whether the asking price is supported by the evidence. Get your report for £9.99 →
Frequently asked questions
Every residential property sale in England and Wales is recorded by HM Land Registry. You can search the Price Paid Data tool on the government website (gov.uk) free of charge. Rightmove and Zoopla also display sold prices. The data typically appears 4–6 weeks after a sale completes.
It varies enormously by location. In central London, price per square metre often exceeds £10,000–£15,000. In regional cities like Manchester or Leeds, £3,000–£5,000 per sqm is typical. In rural areas, £2,000–£3,500 per sqm is common. The key is to compare the subject property to recent comparable sales in the same area — not national averages.
Not necessarily overpriced, but a low EPC rating (D, E, F, G) should be factored into your valuation analysis. Research by Halifax found that EPC-A properties sell for up to 14% more than equivalent EPC-D properties. If a property's asking price doesn't reflect its poor energy performance relative to comparables, it may be overpriced relative to what the market will ultimately pay.
In a normal market, well-priced properties in most UK regions receive an accepted offer within 30–60 days. If a property has been listed for more than 90 days with no accepted offer, it is almost certainly overpriced or has a specific issue deterring buyers. This is one of the clearest signals of mispricing.
Not reliably. Automated valuation models on portals use area averages and cannot account for condition, lease length, planning restrictions, or local micro-factors. They are a useful first-pass indicator but should not be used as the basis for an offer. Comparable analysis using actual Land Registry sold prices, adjusted for the specific property's characteristics, is far more reliable.