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.

18,573 flats measured

Best £/sqft£/m² first

2 listings · £3.58/sqft£38.53/m² median in Balham

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

762 sqft 71 m²

£3.35/sqft £36.06/m² 6% below Balham median
£2,550/mo £1,275 each (if split by room) was £2,615 ◷ relisted 3×

Iris House, Plum Mews, Wandsworth, London

2 bed 2 bath Balham

Also listed here £2,550 same price ↗

listed today avail 5 Oct Share Portal ↗
Property photo
Floorplan

578 sqft 54 m²

£3.50/sqft £37.67/m² price unclear
£2,025/mo was £2,050

Iris House, Plum Mews, Wandsworth, London

1 bed 1 bath Balham

Also listed here £2,050 ↗

listed today avail 6 Nov 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.