About the Siston Conservation Area
The Siston Conservation Area covers about 146 hectares and was designated by South Gloucestershire Council in 1989. Inside the boundary are 12 listed buildings (2 Grade I, 1 Grade II*, 9 Grade II). The most significant is Parish Church of St Anne, Grade I. 23 Tree Preservation Order records overlap the area; every other tree here still needs six weeks’ notice before work.
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 AnneGrade I
- Siston CourtGrade I
- Lodges to Siston CourtGrade II*
- Barn and cowstalls to east of Northmead FarmhouseGrade II
- Barn to North West of Langton FarmhouseGrade II
- Chest Tomb Commemorating Thomas Jeffries (died 1809) and 3 Chest Tombs Commemorating the Jeffries (2 Late Eighteenth Century, One Early-Mid Nineteenth Century) Grouped Approximately 25 Yards to South of the South ChapelGrade II
- Northmead FarmhouseGrade II
- Overscourt FarmhouseGrade II
- The GrangeGrade II
- The Old TurnpikeGrade II
- The RectoryGrade II
- Well House About 100 Yards North West of the GrangeGrade II
The council’s appraisal
WEBSiston Conservation Area AppraisalSouth Gloucestershire 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 South Gloucestershire Council and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.