About the Old Uxbridge / Windsor Street Conservation Area
The Old Uxbridge / Windsor Street Conservation Area covers about 5.2 hectares and was designated by London Borough of Hillingdon in 1973. Inside the boundary are 28 listed buildings (2 Grade II*, 26 Grade II). The most significant is Church of St Margaret, Grade II*. 3 Article 4 directions over the area remove further householder rights, on top of the conservation area limits below.
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.
- Changes of use from commercial, business and service uses to dwellinghousesChange of use
- Houses of Multiple Occupation (HMOs)Householder works
- Residential extensionsHouseholder works
- Construction of new dwellinghouses in employment areasHouseholder 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 MargaretGrade II*
- The Market HouseGrade II*
- 10 and 11, High StreetGrade II
- 10-12, Windsor StreetGrade II
- 13 and 14, Windsor StreetGrade II
- 15, Windsor StreetGrade II
- 16, 16a, 17 and 17a, Windsor StreetGrade II
- 18 and 19, High StreetGrade II
- 18-20, Windsor StreetGrade II
- 2 K6 Telephone Kiosks Outside Post Office, South End of Windsor StreetGrade II
- 20 High StreetGrade II
- 21 and 21a, Windsor StreetGrade II
- 25-27, High StreetGrade II
- 274, High StreetGrade II
- 39 and 40, Windsor StreetGrade II
- 41 and 42, Windsor StreetGrade II
- 43-45, Windsor StreetGrade II
- 46-48, Windsor StreetGrade II
- 50, Windsor StreetGrade II
- 51, 52, 52a and 53, Windsor StreetGrade II
- Midland BankGrade II
- Norman Reeves MotorsGrade II
- Randalls Department StoreGrade II
- The Queen's Head Public HouseGrade II
Show all 28 listed buildings ↓All 28 listed buildings
Streets in the conservation area
Streets with listed buildings inside the boundary. Boundaries often split a street — check your exact address.
Nearby conservation areas
Boundary and listed buildings from London Borough of Hillingdon and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.