About the St Marks Conservation Area
The St Marks Conservation Area covers about 23 hectares and was designated by London Borough of Lambeth in 1969. Inside the boundary are 23 listed buildings (3 Grade II*, 20 Grade II). The most significant is Church of St Mark, Grade II*. 2 Article 4 directions over the area remove further householder rights, on top of the conservation area limits below. 26 Tree Preservation Order records overlap the area; every other tree here still needs six weeks’ notice before work. 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.
- ST MARKSHouseholder works
- ST MARKS/HANOVER GARDENSHouseholder 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.
- Church of St MarkGrade II*
- Lodge at Entrance to Kennington ParkGrade II*
- The Belgrave Hospital For ChildrenGrade II*
- 15, Clapham Road Sw9Grade II
- 2-7, Hanover Gardens Se11Grade II
- 20, Hanover Gardens Se11Grade II
- 21-27, Hanover Gardens Se11Grade II
- 27-41, Clapham Road Sw9Grade II
- 28-37, Hanover Gardens Se11Grade II
- 38, Hanover Gardens Se11Grade II
- 39 and 40, Hanover Gardens Se11Grade II
- 41,42 and 43, Hanover Gardens Se11Grade II
- 44-48, Hanover Gardens Se11Grade II
- 49-54, Hanover Gardens Se11Grade II
- 60-66, Clapham Road Sw9Grade II
- 63-73, Clapham Road Sw9Grade II
- 75, Clapham Road Sw9Grade II
- 92-122, Clapham Road Sw9Grade II
- Decorative Column on West Side of Kennington ParkGrade II
- First World War Memorial at the Church of St Mark, KenningtonGrade II
- Queen's London Regiment 24th Battalion War MemorialGrade II
- The Hanover Arms Public HouseGrade II
- Wall and Piers Around West, North and East Sides of St Mark's ChurchyardGrade II
Nearby conservation areas
Boundary and listed buildings from London Borough of Lambeth and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.