Challenge 
Prime London property prices
What homes in prime London have actually sold for, and how prices have moved since 2024. Both come from HM Land Registry sale prices, and both matter for the mansion tax, which values homes at April 2026.
Local sale prices
What homes actually sold for, per square foot, in each prime London area every quarter. The figures are sale prices with floor areas from energy certificates, as sold and not adjusted.
Median price per sq ft of homes sold in each area, by quarter. Choose up to four areas. Gaps mark quarters with fewer than 15 sales; the latest quarter is left out because sales are still being registered. Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
See all areas as a table
For two areas in detail, see our research on mansion tax in Chelsea and mansion tax in Kensington: how recorded sales fall across the bands, and how many sit just above a threshold.
London price trends
How London prices per square foot have moved since January 2024, month by month, for prime central and outer London flats and houses. We built this index from HM Land Registry sales, with April 2026 = 100, and use it to bring every London comparable sale to April 2026 prices, the proposed valuation date for the mansion tax.
What do these prices mean for your mansion tax?
The mansion tax will be set on what your home was worth in April 2026. If prices in your area have fallen since homes like yours last sold, an automated valuation that leans on older or higher sales could overstate its value, and the band it puts you in.