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.

18,576 flats measured

Best £/sqft£/m² first

2 listings · £4.70/sqft£50.59/m² median in NW3

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

1,898 sqft 176 m²

£4.43/sqft £47.68/m² 6% below NW3 median
£8,400/mo £2,800 each (if split by room) was £8,500

Perrins Lane, London, NW3

3 bed 3 bath Hampstead

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

size unknown

—/sqft/m²
£5,993/mo £1,998 each (if split by room) was £6,899 ◷ relisted 2×

Wedderburn Road, Hampstead, NW3

3 bed 2 bath Belsize Park

Also listed here £6,478 ↗

3 days on market avail now Share Portal ↗

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.