About the Kew Bridge Conservation Area
The Kew Bridge Conservation Area covers about 6.9 hectares and was designated by London Borough of Hounslow in 2004. Inside the boundary are 9 listed buildings (3 Grade I, 6 Grade II). The most significant is Great Engine House, Kew Bridge Pumping House, Grade I. 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.
- Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 DirectionChange of use
- Change of use or development that would result in new dwellings (Class MA/ZA)Change of use
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.
- Great Engine House, Kew Bridge Pumping HouseGrade I
- Main Building, Kew Bridge Pumping StationGrade I
- Metropolitan Water Board Pump House Tower, Kew BridgeGrade I
- Boiler Houses, Coal Store, Steam Engine House and Link to Great Engine House at Kew Bridge Pumping StationGrade II
- Gatehouse and Boundary Wall at Kew Bridge Pumping StationGrade II
- Kew BridgeGrade II
- Kew Bridge StationGrade II
- Railings, Two Sets of Gatepiers and Wall Fronting Kew Bridge RoadGrade II
- Range of Ancillary Buildings Including Forge and Workshops, At Kew Bridge Pumping StationGrade II
Nearby conservation areas
Boundary and listed buildings from London Borough of Hounslow and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.