About the Silverthorne Lane Conservation Area
The Silverthorne Lane Conservation Area covers about 14 hectares and was designated by Bristol City Council in 2021. Inside the boundary are 7 listed buildings (1 Grade II*, 6 Grade II). The most significant is St Vincent's Works and Attached Front Area Railings, Grade II*. 1 Article 4 direction over the area removes further householder rights, on top of the conservation area limits below. Part of the area lies in flood zone 3, so an extension may need a flood risk assessment.
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.
Article 4 directions here
These overlap the conservation area. Householder directions remove more of the rights above; change-of-use ones don’t affect extending a house.
- Ashley Ward, Cabot Ward, Clifton East Ward, Cotham Ward and Lawrence Hill Ward (1999 ward boundary)Householder works
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.
- St Vincent's Works and Attached Front Area RailingsGrade II*
- Gasworks Perimeter WallGrade II
- St Vincent's Works FactoryGrade II
- St Vincent's Works north gateway and attached wallsGrade II
- St Vincent's Works, Gateway and Attached Wall to South WestGrade II
- Warehouse, Former Premises of Marble Mosiac CompanyGrade II
- Warehouse, Premises of Clarks Wood CompanyGrade II
The council’s appraisal
WEBSilverthorne Lane Conservation Area AppraisalBristol City Council’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 Bristol City Council and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.