About the Harmondsworth Village Conservation Area
The Harmondsworth Village Conservation Area covers about 32 hectares within London Borough of Hillingdon’s area. Inside the boundary are 19 listed buildings (1 Grade I, 1 Grade II*, 17 Grade II). The most significant is The Great Barn, Harmondsworth, Grade I. 1 Article 4 direction over the area removes further householder rights, on top of the conservation area limits below. 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.
- Changes of use from commercial, business and service uses to dwellinghousesChange of use
- Changes of use from commercial, business and service uses to dwellinghousesChange of use
- Residential extensionsHouseholder 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.
- The Great Barn, HarmondsworthGrade I
- Church of St Mary, HarmondsworthGrade II*
- 25, Holloway LaneGrade II
- Acacia HouseGrade II
- Harmondsworth HallGrade II
- Howcroft (rear Part Only)Grade II
- K6 Telephone Kiosk in Front of Five Bells Public HouseGrade II
- Manor FarmhouseGrade II
- The Crown Public HouseGrade II
- The Five Bells InnGrade II
- The Gable StoresGrade II
- The GrangeGrade II
- The LodgeGrade II
- The Sun HouseGrade II
- The Vicarage Tower HouseGrade II
- Wall and Gates to South of Harmondsworth HallGrade II
- Wall to East of the GrangeGrade II
- Wall to East of the LodgeGrade II
- Wall to West and North of the GrangeGrade II
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.