GaffFinder

London lettings, by the square foot

Saved Get alerts

Every London flat, measured.

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

18,516 flats measured

Best £/sqft£/m² first

6 listings · £1.88/sqft£20.24/m² median in Blackfen

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.

size unknown

—/sqft/m²
£1,250/mo ◷ 54 days on market

Bellegrove Road, Welling, Kent, DA16

1 bed 1 bath Belle Grove

54 days on market avail now Share Agent's site ↗

size unknown

—/sqft/m²
£2,250/mo £750 each (if split by room) ◷ 2mo on market

Caithness Gardens, Sidcup, DA15

3 bed 1 bath Blackfen

2mo on market avail now Share Agent's site ↗

size unknown

—/sqft/m²
£2,000/mo £667 each (if split by room) ◷ 2mo on market

Radnor Avenue, Welling, DA16

3 bed 1 bath Blackfen

2mo on market avail now Share Agent's site ↗

size unknown

—/sqft/m²
£1,850/mo £925 each (if split by room) ◷ 39 days on market

Ramillies Road, Sidcup, DA15

2 bed 1 bath Blackfen

41 days on market avail now Share Agent's site ↗

size unknown

—/sqft/m²
£2,000/mo ◷ 2mo on market

Welling High Street, Welling

0 bed ? bath Belle Grove

2mo on market Share Portal ↗

size unknown

—/sqft/m²
£1,050/mo ◷ 2mo on market

Welling, Kent, DA16

0 bed 1 bath Belle Grove

2mo 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.