HA5 postcode district

Postcodes and sectors

1,094 of the district's 1,909 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 51.59504, -0.38633, which locates the district, not a building.

Companies registered in HA5

Companies House lists 7,923 companies with a registered office in HA5; 3,324 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 HA5

• London
• Greater London
• Harrow
• Hillingdon
• Ruislip
• Northwood
• Three Rivers
• Hertfordshire
• Eastern

Roads filed under HA5

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.

• Abbey Close
• Abbotsbury Gardens
• Ainsdale Crescent
• Alandale Drive
• Albury Drive
• Alison Close
• Altham Road
• Amberley Close
• Anglesmede Crescent
• Anglesmede Way
• Anselm Road
• Antoneys Close
• Arden Mhor
• Armstrong Close
• Ashcroft
• Ashdene
• Ash Hill Drive
• Ashley Close
• Ashridge Gardens
• Aspen Grove
• Athol Close
• Athol Gardens
• Audley Court
• Avenue Road
• Azalea Walk
• Barnhill
• Barrowdene Close
• Barrow Point Avenue
• Barrow Point Lane
• Barters Walk
• Baycroft Close
• Beatrice Close
• Beaulieu Drive
• Bede Close
• Beechengrove
• Beeton Close
• Bell Close
• Betjeman Close
• Birches Close
• Birchmead Avenue
• Birkdale Avenue
• Bishops Walk
• Black Gates
• Blythwood Road
• Boldmere Road
• Boundary Road
• Braeside Close
• Bramley Close
• Briants Close
• Bridge Street
• Bridle Road
• Broadmead Close
• Brunswick Close
• Buckland Rise
• Burhill Grove
• Burlington Close
• Burwood Avenue
• Cannonbury Avenue
• Cannon Lane
• Capel Gardens

Check an address in HA5

Check an address in HA5

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=HA5" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about HA5

What does an HA5 postcode tell you?

That the address lies in the HA5 district of the HA (Harrow) 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 1,094 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 HA5

• HA22.9 km
• HA63.1 km
• HA43.2 km
• HA13.7 km
• WD194.0 km
• HA34.5 km
• HA75.5 km
• UB55.8 km
• WD235.9 km
• WD186.3 km
• UB106.8 km
• UB67.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids