GaffFinder

London lettings, by the square foot

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Every London flat, measured.

The portals won’t let you rank by size. We read the floorplans, so you can.

18,554 flats measured

Best £/sqft£/m² first

2 listings · £6.54/sqft£70.40/m² median in Brompton

Sizes are estimates: an AI model reads most of them from the floorplan, and it can be wrong — so can the £/sqft£/m² worked out from them. Check with the agent before you rely on one.

Property photo
Floorplan

1,655 sqft 154 m²

£4.83/sqft £51.99/m² 26% below Brompton median
£8,000/mo £2,000 each (if split by room) ◷ relisted 1×

Onslow Square, South Kensington, SW7

4 bed 3 bath Brompton

listed today avail 31 Oct Share Agent's site ↗
Property photo
Floorplan

3,031 sqft 282 m²

£9.94/sqft £106.99/m² 52% above Brompton median
£30,117/mo £6,023 each (if split by room)

Cadogan Street, Chelsea, London, SW3

5 bed 4 bath Brompton

listed today Share Agent's site ↗

How we know the size

  1. 01

    We collect

    Every new flat to rent in London, checked through the day, seven days a week.

  2. 02

    We read the floorplan

    A vision model reads the plan the way you would — room by room, taking the dimensions printed on it. It is an AI estimate, and it can be wrong.

  3. 03

    We measure

    That gives a square footage, and a price per square foot. You can sort and filter on both. The portal offers neither.