Most expensive London postcodes in 2025: where the £1M+ market clusters

A handful of central-London postcodes still concentrate a disproportionate share of the UK's high-value housing market. Across the 93,312 residential sales recorded in Greater London in 2025, 11,877 — about one in eight — crossed the £1 million mark (HM Land Registry Price Paid data, fetched 2026-05-20). Thirteen postcode-district prefixes between Mayfair and Hampstead accounted for 4,306 of those £1M+ sales and £12.15 billion of the £27.05 billion traded above £1M — roughly 45% of the London £1M+ trading cash, against only a few percent of the city's housing stock.

This is a descriptive look at the 2025 numbers: which districts cluster highest by median sale price, how the property mix differs from the rest of the capital, and what the £/sqft picture looks like once EPC floor-area data is layered on. We don't read intent into the data — Land Registry records the price and the address, never the purchaser's nationality, residency or motive. Where commentary is appropriate, we anchor to public HMRC and ONS sources.

Top 20 London postcode districts by median 2025 sale price

Median is used rather than mean — average sale prices in the most expensive districts are heavily skewed by individual transactions above £30M. The table below filters to districts with at least 30 residential sales above £100,000 in calendar-2025, to keep small-sample noise out of the ranking.

Source: HM Land Registry Price Paid data joined to OS Code-Point postcode geography; sales >= £100,000 only; calendar-2025; fetched 2026-05-20.

For context, the London-wide average residential sale price across all 93,312 2025 transactions was £723,370, and the London region UK HPI index reading for February 2026 (the latest release at the time of writing) was 95.0, versus a UK reading of 102.7 — the London index has been running below the all-UK index since the mid-2020s rebasing (ONS UK HPI, Office for National Statistics).

The shape of the upper tail

Median is the right summary for typical district pricing, but the total cash traded — column six above — is what makes the prime-central concentration unusual. NW3 (Hampstead) recorded £970.8M of residential trading in 2025 alone; SW3 (Chelsea) £776.1M; W11 (Notting Hill) £743.8M; W8 (Kensington) £710.1M. Each of those four postcode districts traded more residential cash in 2025 than the entire 2025 sales total of most English local authorities.

At the extreme end, 55 residential sales completed at £20 million or above across the 13 prime-central districts in 2025, with a combined headline value of £2.15 billion. The highest single transaction recorded in our prime-central window was a £260 million sale on Wardour Street (W1D) in October 2025 — a value that almost certainly reflects a mixed-use or freehold building transaction registered under the residential pp-complete file, since freestanding £260M residential dwellings are vanishingly rare. The next-highest recorded sales were a pair of £118.67M transactions on Old Bond Street (W1S) in October 2025 and a £75.57M sale on Adam's Row (W1K) in January 2025. These are public records from the Land Registry pp-complete file and carry no purchaser-identifying information.

Property mix differs sharply from the rest of London

Across the 13 prime-central districts, the residential mix in 2025 was overwhelmingly flats:

The "Other" property type — typically lateral conversions, mews freeholds, or large mixed-use blocks — carries the highest mean price in the prime-central postcodes because the residential category at this end of the market is increasingly dominated by full-floor and full-house freeholds rather than the conventional flat/terrace/semi taxonomy. Detached residential remains rare in central London but trades at meaningful averages where it exists.

For comparison: across Greater London as a whole in 2025, flats accounted for roughly 56% of recorded transactions; terraced houses about 24%; semi-detached and detached together around 18%. The prime-central districts skew much more heavily towards flats — about 71% of recorded 2025 sales by count — because the dominant housing form between Mayfair and Hampstead is purpose-built or converted apartments, often in stuccoed terraces or mansion blocks.

£ per square foot — the cleanest cross-district comparison

Joining the EPC Domestic dataset (29M certificates) to Land Registry 2025 sales by address gives a per-floor-area picture. We exclude certificates with floor areas below 20 m² or above 500 m² (likely data errors), and only show districts with at least 15 matched sales:

Source: HM Land Registry pp-complete joined to EPC Domestic register, 2025 sales only. As noted in HM Land Registry's published data caveats and the EPC programme guidance, EPC floor-area data is collected at the time of assessment and may pre-date the most recent refurbishment or extension; the figures above are best read as district-level averages rather than as inputs to any specific property's valuation.

EPC running-cost figures are not included in this comparison because the published annualenergycost field is calculated against 2012-era cost assumptions and does not reflect post-2022 Ofgem cap movements.

Tax friction at the top of the market

The combination of high sale prices and the SDLT slab structure means transactions in these districts carry the largest stamp-duty bills in the country. Using the current HMRC SDLT residential rates (HMRC, stamp duty residential rates page):

• A standard-buyer purchase at the W1K 2025 median price of £4,468,000 carries a stamp-duty bill of £506,350 before any premiums, surcharges, or additional-property uplifts. That is the SDLT on a single transaction, not a typical buyer's total annual outlay.
• A non-resident buyer (where the residency test set out in HMRC's SDLT manual SDLTM09850 is failed) would pay an additional 2% surcharge on top — a further £89,360 in the W1K example, taking the SDLT line to roughly £595,710. See our stamp duty rules for non-UK residents for the full mechanics.
• An additional-property purchase (the FA 2003 Schedule 4ZA surcharge) attracts a 5% surcharge on the whole price, taking the SDLT line on a £4.47M purchase to roughly £729,750 before any reliefs.

A more typical worked example sits in our pillar piece on the true cost of buying a £1M home, which walks through SDLT, conveyancing, survey, mortgage payment scenarios at the current Bank of England quoted rate, and council tax — the SDLT figure on a £1M standard purchase under 2026 rules is £43,750.

Council tax adds another counter-intuitive layer at the top of the market. Westminster's 2026-27 Band D charge is £1,049.55 — the cheapest in England by a wide margin — versus Camden's £2,207.55, Kensington and Chelsea's £1,666.65, and Hammersmith and Fulham's £1,519.51 (Department for Levelling Up, Housing and Communities, council tax levels file 2026-27, gov.uk). Band-D headline charges scale to a property's banding (set in 1991) rather than the current sale price, so a £4M flat in a Band-H property in Westminster pays roughly £2,099 in 2026-27 (Band H is 2x Band D) — a comparatively small line in the total annual cost stack for a property in this price band.

The £125k SDLT threshold piece and the £250k threshold piece in our cost-intelligence cluster (£125k threshold bunching, £250k threshold bunching) show how SDLT slab edges shape transaction behaviour at the entry end of the market; the equivalent friction at the prime end shows up most visibly in the £500,000 SDLT cliff edge where first-time-buyer relief tapers out.

What this data does and does not say

The numbers above are descriptive of recorded 2025 transactions only. The Land Registry pp-complete file does not record:

• Buyer or seller identity, nationality, or residency status.
• Mortgage details or cash-versus-financed status.
• Whether the recorded price corresponds to an arm's-length open-market sale, a sale between connected parties, or a transfer of equity at a notional price.

Inferences about buyer behaviour, demographic shifts, or market direction made from price-paid data alone — without independent corroboration from the HMRC UK property transactions statistics, ONS UK House Price Index, or Bank of England Money and Credit release — should be treated with caution.

This is general information drawn from public data, not advice on any specific transaction. Speak to a qualified conveyancer, tax adviser, or RICS-registered surveyor before acting.

Try the tool

To see the full transaction history, EPC data, and true-cost breakdown for any address in the postcodes above, try the Homecost tool on a central-Westminster postcode (SW1A 1AA) or browse other market analysis pieces for the rest of the 2025 data set.

Based on 93,312 Greater London Land Registry transactions in 2025 plus the EPC Domestic register; data fetched 2026-05-20. See the Homecost blog for the full methodology.