About the Alton Conservation Area
The Alton Conservation Area covers about 53 hectares and was designated by London Borough of Wandsworth in 2001. Inside the boundary are 28 listed buildings (2 Grade I, 8 Grade II*, 18 Grade II). The most significant is Mount Clare, 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 Alton 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.
- Mount ClareGrade I
- Parkstead HouseGrade I
- Binley HouseGrade II*
- Charcot HouseGrade II*
- Denmead HouseGrade II*
- Downshire HouseGrade II*
- Dunbridge HouseGrade II*
- Temple in Grounds of Mount ClareGrade II*
- The Bull at Foot of Downshire Field Alton EstateGrade II*
- Winchfield House and Abutting ChimneyGrade II*
- 1-13, Minstead GardensGrade II
- 15-33, Minstead GardensGrade II
- 245-255 Danebury Avenue and retaining wallsGrade II
- 257-261 Danebury Avenue and retaining wallsGrade II
- 26, Bessborough Road Sw15Grade II
- Blendworth PointGrade II
- Cadnam PointGrade II
- Dunhill PointGrade II
- Eashing PointGrade II
- Garden Gates to Downshire House (on North Side of House)Grade II
- Grayswood PointGrade II
- Hilsea PointGrade II
- Hindhead PointGrade II
- Longmoor PointGrade II
Show all 28 listed buildings ↓All 28 listed buildings
The council’s appraisal
WEBAlton Conservation Area AppraisalLondon Borough of Wandsworth’s description of the area’s character — what planners look at when you apply.Open on council site ↗Nearby conservation areas
Boundary and listed buildings from London Borough of Wandsworth and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.