About the Old Chiswick Conservation Area
The Old Chiswick Conservation Area covers about 24 hectares and was designated by London Borough of Hounslow in 1969. Inside the boundary are 64 listed buildings (1 Grade I, 6 Grade II*, 57 Grade II). The most significant is Walpole 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.
ProjectElsewhereIn Old Chiswick CA
- 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
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.
- Walpole HouseGrade I
- Bedford House Eynham HouseGrade II*
- Church of St Nicholas and attached wallsGrade II*
- Gates and Screen to Walpole HouseGrade II*
- Strawberry HouseGrade II*
- Tombstone to Sir Percy Harris, Bart, St Nicholas ChurchyardGrade II*
- Ye Fox and Hounds and Mawson Arms and Nos. 112-118Grade II*
- 1-3, Page's Yard W4Grade II
- 1-4 Belle Vue Cottages including gatesGrade II
- 1, Chiswick SquareGrade II
- 130-134, MAWSON ROW (See details for further address information)Grade II
- 2, Chiswick SquareGrade II
- 3-6, Chiswick Square including railings and paving stones in gardenGrade II
- 7 and 8, Chiswick Square, including railings to number 8Grade II
- Belle VueGrade II
- Boch and Wright Memorials Approximately 3 Metres and 7 Metres South of South Porch of Church of St NicholasGrade II
- Brampton House Ferry HouseGrade II
- Burlington CornerGrade II
- Cedar HouseGrade II
- Chest Tomb Approximately 14 Metres West of West Tower of Church of St NicholasGrade II
- Churchyard Wall Approximately 30 Metres South West of Church of St NicholasGrade II
- Convent of St Mary Hospital of St JosephGrade II
- Cross of SacrificeGrade II
- Cygnet House RiversideGrade II
Show all 64 listed buildings ↓All 64 listed buildings
- De Loutherbourg Memorial Approximately 26 Metres West of Church of St NicholasGrade II
- Foscolo Memorial Approximately 25 Metres South West of West Tower of Church of St NicholasGrade II
- Fullers Brewery, Middle Section, Containing Board RoomGrade II
- Garden House to Rear of Number 110, Fox and Hounds Public HouseGrade II
- Garden Wall to Bedford HouseGrade II
- Garden Wall to Wistaria WistariaGrade II
- Gazebo in Grounds of Bedford ParkGrade II
- Group of 5 Chest Tombs and Headstone in Railed Enclosure Approximately 10 Metres West of North Aisle of Church of St NicholasGrade II
- Group of 9 Chest Tombs Approxmately 8 Metres South of South Aisle of Church of St NicholasGrade II
- Group of Two Chest Tombs (woodroffe and Crisp Memorials) Aproximately 2 to 4 Metres North of North Aisle of Church of St NicholasGrade II
- Hogarth Memorial Approximately 8 Metres South of South Aisle of Church of St NicholasGrade II
- Hudson and Austin Memorials Approximately 26 Metres South West South of South Porch of Church of St NicholasGrade II
- Island House Garden Wall and Railings to Island HouseGrade II
- Knowles Memorial Approximately 18 Metres South West of South Porch of Church of St NicholasGrade II
- Latimer House and Holly House, including garden wall, iron gates and screenGrade II
- Lingard House Thames ViewGrade II
- Magnolia Thames CoteGrade II
- Morton House Railings of Morton HouseGrade II
- Norfolk House Garden Wall and Railings to Norfolk HouseGrade II
- Oak CottageGrade II
- Old BurlingtonGrade II
- Post OfficeGrade II
- Railings and Gate of Strawberry HouseGrade II
- Railings and Gate to Vine House Vine HouseGrade II
- Rear Garden Wall to the Hollies Chiswick HallGrade II
- Rear Garden Wall to Walpole House Chiswick MallGrade II
- Red Lion HouseGrade II
- St Johns HouseGrade II
- Swan HouseGrade II
- The George and Devonshire Arms Public HouseGrade II
- The OziersGrade II
- The Tides and Orford HouseGrade II
- The VicarageGrade II
- Tomb of Frederick Hitch VcGrade II
- Tomb of Sir William Blake RichmondGrade II
- Towneley and King Memorials Approximately 18 to 21 Metres South of South Porch of Church of St NicholasGrade II
- Wall of Fullers Brewery (mawson Arms) Fronting Great West RoadGrade II
- Watkins Memorial Approximately 10 Metres South West of South Porch of Church of St NicholasGrade II
- Whistler Memorial Adjacent to South Side of Powell's Walk, Approximately 120 Metres West of Church of St NicholasGrade II
- Woodroffe House and garden wall to Woodroffe HouseGrade 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.