SW1H postcode district

Postcodes and sectors

91 of the district's 364 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 51.49864, -0.13351, which locates the district, not a building.

Companies registered in SW1H

Companies House lists 2,666 companies with a registered office in SW1H; 2,264 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 SW1H

• Greater London
• London
• City of Westminster
• Wandsworth

Roads filed under SW1H

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.

• Birdcage Walk
• Broadway
• Butler Place
• Carteret Street
• Caxton Street
• Cockpit Steps
• Dacre Street
• Dartmouth Street
• Dean Farrar Street
• Lewisham Street
• Matthew Parker Street
• Old Queen Street
• Orchard Place
• Palmer Street
• Petty France
• Queen Anne's Gate
• St Ermin's Hill
• Tothill Street
• Vandon Passage
• Victoria Street

Check an address in SW1H

Check an address in SW1H

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SW1H" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SW1H

What does an SW1H postcode tell you?

That the address lies in the SW1H district of the SW (South 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 91 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 SW1H

• SW1E0.4 km
• SW1A0.7 km
• SW1P1.0 km
• SW1Y1.0 km
• SW1V1.1 km
• W1J1.3 km
• WC2N1.3 km
• SW1W1.4 km
• W1S1.5 km
• SW1X1.6 km
• WC2E1.6 km
• W1D1.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids