About the Canons Park Estate Conservation Area
The Canons Park Estate Conservation Area covers about 63 hectares within London Borough of Harrow’s area. Inside the boundary are 6 listed buildings (1 Grade I, 5 Grade II). The most significant is Church of St Lawrence, Grade I.
What changes inside the conservation area
Conservation areas are “Article 2(3) land”. You keep most permitted development rights, but these are removed or tightened.
ProjectElsewhereIn Canons Park Estate CA
- Rear extensionElsewhere: 3 m · 6 m with PANo 6 m / 8 m prior approval
- Two-storey extensionElsewhere: 3 mNeeds planning permission
- Side extensionElsewhere: Half the widthNeeds planning permission
- Loft conversionElsewhere: 50 m³Needs planning permission
- Garden roomElsewhere: 2.5 m high by boundariesNot beside the house
- PorchElsewhere: 3 m²Same limits
- Solar panelsElsewhere: 0.2 m projectionSame limits
- Air source heat pumpElsewhere: 1 unitNot facing the road
- Fences, walls and gatesElsewhere: 2 m · 1 m by a roadSame limits
- External claddingElsewhere: Matching materialsNeeds planning permission
- Tree workElsewhere: No notice6 weeks’ notice to the council
- Demolition (over 115 m³)Elsewhere: AllowedNeeds planning permission
Limits for a semi-detached house under the GPDO 2015. An Article 4 direction can remove more.
Listed buildings in the conservation area
Any work affecting these needs listed building consent, inside or out. Each links to its entry on the National Heritage List.
- Church of St LawrenceGrade I
- Garden Temple, Supporting Walls and Raised Paved Area in Canons ParkGrade II
- Main building, formerly Canons House, North London Collegiate SchoolGrade II
- Pair of Gate Piers at Entrance to Road From the High StreetGrade II
- Wall Enclosing Garden to North West of George V Memorial Garden in Canons ParkGrade II
- Wall enclosing George V Memorial Garden in Canons ParkGrade II
Nearby conservation areas
Boundary and listed buildings from London Borough of Harrow and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.