About the Colnbrook Conservation Area
The Colnbrook Conservation Area covers about 9.4 hectares within Slough Borough Council’s area. Inside the boundary are 24 listed buildings (2 Grade II*, 22 Grade II). The most significant is King Johns Palace, Grade II*. 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.
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.
- King Johns PalaceGrade II*
- The Ostrich Public HouseGrade II*
- 1, 2 and 3, Park StreetGrade II
- Aberdeen HouseGrade II
- AbingtonGrade II
- Badminton House, Post Office, Adjoining House and Hampton HouseGrade II
- Barn at Tanhouse Farm to South East of the FarmhouseGrade II
- Barn to King John's PalaceGrade II
- Barn to Rear of Aberdeen HouseGrade II
- Church of St ThomasGrade II
- Colne CottageGrade II
- Fairmead and the HavenGrade II
- Former School (now Colnbrook Youth Centre)Grade II
- Kenilworth and Adjoining HouseGrade II
- Lucas (newsagent)Grade II
- Milestone Outside No 3 Milestone CottagesGrade II
- Mill House and Tanhouse Farmhouse J R Swanston Plant and Engineer (longford) LimitedGrade II
- Number 110 and House Adjoining to West (anthonys (79) Ltd)Grade II
- Old School HouseGrade II
- Park House and Ye Olde George Public HouseGrade II
- St Thomas's VicarageGrade II
- Star and Garter Public HouseGrade II
- The White Hart InnGrade II
- Town HouseGrade II
The council’s appraisal
WEBColnbrook Conservation Area AppraisalSlough Borough 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 Slough Borough Council and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.