Is this flat overpriced, how to value it from sold prices

Why asking prices and other asking prices are the wrong yardstick

An asking price is a starting position set by the seller and their agent, not a fact about value. It reflects what the seller hopes to get, what the agent needed to quote to win the instruction, and sometimes a deliberate overprice to test the market. Comparing your flat's asking price to the asking prices of other flats nearby just compares one set of hopes to another.

The number that matters is the sold price, the figure a buyer and seller actually agreed and a solicitor completed. Sold prices are real transactions with real money behind them. They already account for the haggling, the survey downvaluations, and the lender's view of the property. When you value from sold prices you are measuring the flat against what the market has been willing to pay, which is the only test that protects your offer.

A fair warning. Sold data runs a month or two behind completion and says nothing on its own about a fast-moving or falling market. Treat it as your anchor, then layer current signals on top.

Where to find what flats really sold for, HM Land Registry sold price data explained

The primary source for England and Wales is HM Land Registry Price Paid Data, searchable free at the gov.uk Price Paid tool and mirrored inside the sold-price sections of the main portals. It records the actual completed price, the full address, the date of sale, whether the property is freehold or leasehold, and whether it was a new build.

Start with the exact building. Search the postcode and street, then read every flat in the block that has sold recently. Flats in the same building are your strongest comparables because they share the lease structure, the service charge regime, the construction, and the location down to the front door. Next widen to the street, then to a tight radius of similar blocks.

Two limits to know. Price Paid Data does not include the floor, the internal size, or the condition, so two sales at the same recorded price could be a refurbished top-floor flat and a tired ground-floor one. It also omits most shared-ownership sales and some transfers. Use the gov.uk EPC register to recover floor area in square metres for many flats, since most EPCs list it, and cross-check the listing photos and floor plan for condition and aspect. Treat any figure you pull this way as an input to verify, not a fact.

Building a fair comparable set, same building, same street, then widening sensibly

Aim for three to six genuine comparables, sold within the last 12 to 24 months. Quality beats quantity. One near-identical flat in the same block sold four months ago is worth more than ten loosely similar sales a mile away.

Work outward in rings. First, the same building or development. Second, the same street and immediately adjoining streets. Third, similar blocks within roughly a quarter to half a mile that share the type and era. Stop widening the moment the character changes. A purpose-built 1960s block and a converted Victorian house are not interchangeable, and crossing a main road, a railway line, or a school catchment boundary can move values sharply.

Match on the things that drive flat value. Number of bedrooms, internal floor area, whether it is purpose-built or a conversion, the floor level, outside space, and parking. Note each comparable's sold price, date, and source so every figure in your final estimate traces back to a public record you can show the agent.

Adjusting comparables for size, floor, condition, and lease length

No two flats are identical, so adjust each comparable up or down toward the subject flat. The cleanest way to normalise for size is price per square metre. Divide each comparable's sold price by its floor area, then apply the resulting rate to the subject flat's area. Label this an estimate, because floor areas from EPCs and floor plans carry small errors.

Then layer qualitative adjustments and be explicit that they are judgement, not arithmetic. Higher floors with a lift usually command more, top floors without a lift often less. A recently refurbished flat usually beats a dated one. A long lease beats a short one, and that gap tends to widen as the lease shortens.

Lease length deserves real care. As a lease falls toward 80 years remaining, the cost to extend rises, and under the long-established position of the Leasehold Reform, Housing and Urban Development Act 1993 marriage value can become payable below 80 years. The Leasehold and Freehold Reform Act 2024 is set to change this, but not all of its provisions are in force yet and the detailed rates are still being worked out, so the position in practice is mid-reform. Treat a short lease as a material discount, and confirm the current rules and any premium with a solicitor before you rely on a number.

Reading the signals around the price, time on market and any reductions

The listing itself carries evidence beyond the photos. Two signals matter most.

Time on market. A flat that has sat unsold for months while similar homes nearby sell quickly is telling you the price is ahead of demand. Portals often show the first-listed date or a price history. A long, quiet listing strengthens your case for a lower offer.

Price reductions. A sequence of cuts means the seller started high and the market pushed back. Each reduction is the seller conceding your point for you. Note the original asking price and every drop.

Read these alongside, not instead of, the sold evidence. A flat can be freshly listed at a fair price, or reduced and still overpriced. The sold comparables remain the anchor. The market signals tell you how much room you have and how motivated the seller might be.

Turning the comparison into a sensible offer range you can defend

Convert your adjusted comparables into a single figure, then a range. Take the per-square-metre rates from your best comparables, apply them to the subject flat's area, and add or subtract for floor, condition, outside space, and lease. That gives your central estimate of fair value.

Build a range around it. As a rule of thumb, a band of a few percent either side of the central estimate reflects the genuine uncertainty in your floor areas and condition judgements. Your opening offer typically sits at or just below the bottom of that band, leaving room to settle near the middle. Treat these as working assumptions, not fixed rules.

The defence is the method. When you offer, you are not saying the price feels high. You are saying three or four named flats in or near the building sold for these recorded amounts on these dates, here is how each compares, and here is the value that points to. An evidence-backed offer is far harder for an agent to dismiss than a round-number lowball. Keep your comparable table to hand for the negotiation.

Common traps, new-build premiums, refurb gloss, and outliers that skew the picture

A few things quietly distort a sold-price comparison.

New-build premium. Brand-new flats often sell at a premium that does not fully survive into resale, similar to a new car losing value when it leaves the forecourt. If your comparables are new-build first sales, expect resale values to sit below them, and flag new builds in Price Paid Data, which marks them.

Refurb gloss. Staged photography and a fresh kitchen can make a flat feel worth more than the comparables support. Adjust for genuine, lasting improvements, not styling.

Outliers. One unusually high or low sale can drag a small sample. Check for a reason, a much larger flat, a probate or quick sale, a special view, and set true outliers aside rather than averaging them in. Also watch for related-party transfers and shared-ownership sales recorded at a share price, both of which understate full value. Keep your set clean and your central estimate stays honest.

What the sold-price test cannot price in, and why a survey still matters

The sold-price method tells you whether the asking price is reasonable against the market. It cannot tell you whether this specific flat has hidden problems, and those can dwarf any negotiation.

It does not see condition behind the walls, damp, structural movement, or roof issues, which is why a RICS survey before exchange remains essential. It does not fully price building safety. For taller blocks, cladding and remediation can sit outside the visible price, so check the building's status, including the Building Safety Fund register on gov.uk, and ask for the relevant safety information, broadly in line with the framework introduced by the Building Safety Act 2022. And it does not capture the running costs that erode value over time, the service charge, ground rent, and any planned major works, where Section 20 consultation applies for qualifying works costing any leaseholder more than £250, or for long-term agreements costing any leaseholder more than £100 a year.

So use the sold-price test to set a fair price, then use a survey, the lease, the service charge accounts, and a solicitor's review to confirm the flat is worth buying at any price. Flatscope can speed up the first part, distilling public records such as HM Land Registry sold prices and EPC data and published guidance into a single read, but it is a starting point for your own checks, not a substitute for a solicitor, a surveyor, or your own judgement.