Every London flat, measured.

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

18,605 flats measured

Best £/sqft£/m² first

13 listings · £8.17/sqft£87.94/m² median in Mayfair

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.

Floorplan

4,893 sqft 455 m²

£5.76/sqft £62.00/m² 29% below Mayfair median

£28,167/mo £4,024 each (if split by room)

Upper Brook Street, Marble Arch, W1K

7 bed 5 bath Marylebone

Also listed here £47,667 short let ↗

5 days on market avail now Agent's site ↗

Floorplan

4,893 sqft 455 m²

£5.76/sqft £62.00/m² 29% below Mayfair median

£28,167/mo £4,024 each (if split by room)

Upper Brook Street, London, W1K

7 bed 7 bath Marylebone

3 days on market Portal ↗

Floorplan

4,893 sqft 455 m²

£5.76/sqft £62.00/m² 29% below Mayfair median

£28,167/mo £4,695 each (if split by room)

Upper Brook Street, Mayfair, London, W1K

6 bed 6 bath Marylebone

listed today Agent's site ↗

Floorplan

5,478 sqft 509 m²

£10.24/sqft £110.22/m² 25% above Mayfair median

£56,117/mo £11,223 each (if split by room)

Tilney Street, Mayfair, London, W1K

5 bed 5 bath Marylebone

listed today avail now Agent's site ↗

Floorplan

4,607 sqft 428 m²

£12.23/sqft £131.64/m² 50% above Mayfair median

£56,333/mo £14,083 each (if split by room)

Mount Street, Mayfair, London, W1K

4 bed 4 bath Marylebone

4 days on market avail 30 Sep Agent's site ↗

Floorplan

3,940 sqft 366 m²

£15.40/sqft £165.76/m² 88% above Mayfair median

£60,667/mo £15,167 each (if split by room)

Mount Street, London

4 bed 4 bath Marylebone

6 days on market avail now Agent's site ↗

Floorplan

3,940 sqft 366 m²

£15.40/sqft £165.76/m² 88% above Mayfair median

£60,667/mo £15,167 each (if split by room)

Penthouse, Mount Street, Mayfair, London, W1K

4 bed 4 bath Marylebone

5 days on market avail 30 Sep Agent's site ↗

Floorplan

4,354 sqft 405 m²

£19.91/sqft £214.31/m² 144% above Mayfair median

£86,667/mo £14,445 each (if split by room)

Grosvenor Square, London, W1K

6 bed 6 bath Marylebone

4 days on market avail now Agent's site ↗

Floorplan

1,862 sqft 173 m²

£22.11/sqft £237.99/m² 171% above Mayfair median

£41,167/mo £10,292 each (if split by room)

Park Crescent, London W1B

4 bed 3 bath Marylebone

6 days on market avail now Portal ↗

Floorplan

size unknown

—/sqft/m²

£86,667/mo £17,333 each (if split by room)

Grosvenor Square, Mayfair, W1K

5 bed 5 bath Marylebone

5 days on market avail now Agent's site ↗

size unknown

—/sqft/m²

£56,333/mo £14,083 each (if split by room)

Mount Street, London

4 bed 4 bath Marylebone

5 days on market avail now Portal ↗

size unknown

—/sqft/m²

£54,167/mo £10,833 each (if split by room)

Upper Grosvenor Street, W1K

5 bed 4 bath Chinatown

4 days on market Portal ↗

size unknown

—/sqft/m² short let

£108,333/mo

Upper Grosvenor Street, W1K

5 bed 4 bath Chinatown

4 days on market Portal ↗

How we know the size

01

We collect

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