W1H postcode district

Postcodes and sectors

691 of the district's 1,373 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 51.51770, -0.16121, which locates the district, not a building.

Companies registered in W1H

Companies House lists 5,961 companies with a registered office in W1H; 4,343 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for W1H

• City of Westminster
• Greater London
• London

Roads filed under W1H

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Berkeley Mews
• Beverston Mews
• Brendon Street
• Brown Street
• Brunswick Mews
• Bryanston Mews East
• Bryanston Mews West
• Bryanston Place
• Bryanston Square
• Bryanston Street
• Castlereagh Street
• Cato Street
• Circus Mews
• Clenston Mews
• Crawford Mews
• Crawford Place
• Crawford Street
• Cumberland Gate
• Durweston Street
• Enford Street
• Fitzhardinge Street
• Forset Street
• George Street
• Granville Place
• Great Cumberland Mews
• Great Cumberland Place
• Hampden Gurney Street
• Harcourt Street
• Harrowby Street
• Homer Row
• Homer Street
• Knox Street
• Marble Arch
• Molyneux Street
• Montagu Mews North
• Montagu Mews South
• Montagu Mews West
• Montagu Place
• Montagu Square
• Montagu Street
• New Quebec Street
• Nutford Place
• Old Quebec Street
• Orchard Street
• Portman Close
• Portman Mews South
• Portman Square
• Portman Street
• Portman Towers
• Quebec Mews
• Salisbury Place
• Seymour Mews
• Seymour Place
• Seymour Street
• Shillibeer Place
• Shouldham Street
• Stourcliffe Street
• Thornton Place
• Upper Berkeley Street
• Upper Montagu Street

Check an address in W1H

Check an address in W1H

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=W1H" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about W1H

What does a W1H postcode tell you?

That the address lies in the W1H district of the W (West London) postcode area, and the place OS Open Names most often lists first for its postcodes is City of Westminster. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 691 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest W1H

• W1U0.5 km
• W1C0.9 km
• W1G0.9 km
• W1K1.0 km
• W1W1.4 km
• W1B1.4 km
• W1S1.5 km
• W1J1.6 km
• W21.7 km
• W1T1.7 km
• W1F1.8 km
• NW81.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids