About the Harrow School Conservation Area Harrow on the Hill Conservation Area
The Harrow School Conservation Area Harrow on the Hill Conservation Area covers about 17 hectares within London Borough of Harrow’s area. Inside the boundary are 25 listed buildings (2 Grade I, 4 Grade II*, 19 Grade II). The most significant is Parish Church of St Mary, 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.
- 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.
- Parish Church of St MaryGrade I
- The Old Schools, Harrow SchoolGrade I
- Harrow School ChapelGrade II*
- Harrow School War Memorial Building, Memorial Shrine, Ceremonial Staircase and Retaining WallGrade II*
- Speech Room (harrow School)Grade II*
- Vaughan Library (harrow School)Grade II*
- 1, High StreetGrade II
- 3, High StreetGrade II
- Butler Museum, (harrow School)Grade II
- Church HouseGrade II
- DruriesGrade II
- Garlands (including Boundary Wall)Grade II
- Gates and Garden Wall to the Grove Fronting RoadGrade II
- Grave of Thomas Port, 12 Yards West of South Porch of the Parish Church of St MaryGrade II
- Grove Hill House the FossGrade II
- Headmaster's HouseGrade II
- Leaf Schools (harrow School)Grade II
- Leighton family tombGrade II
- Lych Gate to Parish Church of St MaryGrade II
- Music School (harrow School)Grade II
- New SchoolsGrade II
- The Art SchoolGrade II
- The GroveGrade II
- The Peachey Tomb South of West Entrance to Churchyard of the Parish Church of St MaryGrade II
Show all 25 listed buildings ↓All 25 listed buildings
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.