RG4 postcode district

Postcodes and sectors

1,000 of the district's 1,741 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 51.48290, -0.96968, which locates the district, not a building.

Companies registered in RG4

Companies House lists 2,292 companies with a registered office in RG4; 60 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 RG4

• South East
• Reading
• Caversham
• South Oxfordshire
• Oxfordshire
• Sonning Common
• Sonning
• Wokingham
• Gallowstree Common
• Tokers Green
• Play Hatch
• Chalkhouse Green
• Kidmore End
• Cane End
• Dunsden Green
• Chazey Heath
• Sonning Eye
• Littlestead Green
• Mapledurham
• Trench Green
• Nuney Green

Roads filed under RG4

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.

• Abbotsmead Place
• Abbottsleigh Gardens
• Aberaman
• Abingdon Drive
• Albany Gardens
• Albert Road
• Aldeburgh Close
• Aldenham Close
• All Hallows Road
• Almond Drive
• Alston Walk
• Amersham Road
• Ammanford
• Angle Field Road
• Appletree Close
• Archway Road
• Ardler Road
• Ashcroft Close
• Ashford Avenue
• Atterbury Gardens
• Augustfield
• Autumn Close
• Badgers Rise
• Balliol Road
• Balmore Drive
• Balmore Park
• Balmore Walk
• Banbury Gardens
• Barclose Avenue
• Bardolph's Close
• Barnard Close
• Barnes Road
• Baskerville Road
• Bath Road
• Bay Tree Rise
• Beech Rise
• Beech Road
• Bellingham Walk
• Berrylands Road
• Birch Close
• Birchwood Close
• Bird Wood Court
• Blackmore Lane
• Blackwater Close
• Blaenant
• Blaenavon
• Blagrave Farm Lane
• Blagrave Lane
• Blenheim Road
• Blossom Road
• Blounts Court Road
• Bluebell Gardens
• Boundary Lane
• Brackstone Close
• Bramber Mews
• Bramblings
• Bramley Crescent
• Briant's Avenue
• Briar Close
• Bridge Street

Check an address in RG4

Check an address in RG4

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=RG4" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about RG4

What does an RG4 postcode tell you?

That the address lies in the RG4 district of the RG (Reading) postcode area, and the place OS Open Names most often lists first for its postcodes is Caversham. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,000 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 RG4

• RG13.5 km
• RG304.7 km
• RG65.8 km
• RG55.9 km
• RG316.1 km
• RG27.3 km
• RG97.5 km
• RG108.1 km
• RG89.8 km
• RG4110.4 km
• RG712.0 km
• RG4013.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids