RM3 postcode district

Postcodes and sectors

923 of the district's 1,355 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 51.60194, 0.22453, which locates the district, not a building.

Companies registered in RM3

Companies House lists 3,646 companies with a registered office in RM3; none of them at an address 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 RM3

• London
• Havering
• Greater London

Roads filed under RM3

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.

• Abigail Mews
• Alpine Close
• Alverstoke Road
• Amelle Gardens
• Amersham Close
• Amersham Drive
• Amersham Road
• Amersham Walk
• Appleby Drive
• Appleby Green
• Appledore Close
• Archibald Road
• Archway
• Arlington Gardens
• Arnwil Drive
• Arundel Road
• Ashbourne Road
• Ash Flower Drive
• Ash Lane
• Ashton Road
• Athelstan Close
• Athelstan Road
• Aubrietia Close
• Avenue Close
• Avenue Road
• Aylsham Lane
• Azure Close
• Bampton Road
• Barberry Close
• Barnsley Road
• Barnstaple Path
• Barnstaple Road
• Barrett Close
• Bartholomew Drive
• Bates Road
• Baxter Gardens
• Bedale Road
• Bell Avenue
• Bellflower Path
• Beltinge Road
• Bennison Drive
• Bernwelle Avenue
• Betony Road
• Bideford Close
• Birkdale Avenue
• Blakeborough Drive
• Blanchard Mews
• Bosworth Crescent
• Briar Road
• Briars Walk
• Brick Kiln Road
• Bridgemere Close
• Bridgwater Close
• Bridgwater Road
• Bridgwater Walk
• Brinsmead Road
• Brooklime Path
• Brooks Way
• Broseley Gardens
• Broseley Road

Check an address in RM3

Check an address in RM3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=RM3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about RM3

What does an RM3 postcode tell you?

That the address lies in the RM3 district of the RM (Romford) postcode area, and the place OS Open Names most often lists first for its postcodes is London. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 923 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 RM3

• RM22.4 km
• RM113.4 km
• RM13.5 km
• RM54.1 km
• RM74.9 km
• CM145.0 km
• RM125.6 km
• RM145.7 km
• RM46.3 km
• RM67.2 km
• CM157.2 km
• RM107.8 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids