HA1 · Harrow & Harrow on the Hill
HA1 centres on Harrow on the Hill — the Village, Harrow School and Harrow Park conservation areas, with Roxborough Park nearby. Inside these tightly controlled areas, Article 4 directions remove permitted development so external changes need permission; the Residential Design Guide SPD sets the design bar across the borough.
Location data: postcodes.io · Constraints: planning.data.gov.uk (borough-level) · Open Government Licence
Constraint context · Harrow
Real · planning.data.gov.ukHarrow has 27 designated conservation areas and 0 Article 4 areas. A district is too coarse to say which apply to your house — postcode districts span many streets and HA1 crosses 2 boroughs. Enter a full postcode below for the point-level check, or read the full borough picture on the Harrow planning guide.
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