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.

18,498 flats measured

Best £/sqft£/m² first

4 listings · £6.28/sqft£67.60/m² median in SW3

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

1,409 sqft 131 m²

£6.14/sqft £66.09/m²
£8,650/mo £2,883 each (if split by room) was £8,950 ◷ relisted 5×

Elystan Street, SW3

3 bed 3 bath Brompton

2 days on market Share Agent's site ↗
Property photo
Floorplan

1,499 sqft 139 m²

£9.39/sqft £101.07/m² short let
£14,083/mo was £21,667

Brompton Square, Knightsbridge, London, SW3

2 bed 2 bath Belgravia

3 days on market avail now Share Agent's site ↗
Property photo

size unknown

—/sqft/m²
£2,400/mo was £2,600

Pond Place, London, SW3

1 bed 1 bath Brompton

2 days on market avail 3 Oct 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.