About the High Street and King Street Conservation Area
The High Street and King Street Conservation Area covers about 3.7 hectares and was designated by Watford Borough Council in 2006. Inside the boundary are 15 listed buildings, all Grade II.
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.
- 129 and 131, High StreetGrade II
- 133 and 135, High StreetGrade II
- 137, High StreetGrade II
- 139, High StreetGrade II
- 141, High StreetGrade II
- 145, High StreetGrade II
- 149 and 151, High StreetGrade II
- 158, High StreetGrade II
- 160, High StreetGrade II
- 166 and 168, High StreetGrade II
- 172, High StreetGrade II
- 174, High StreetGrade II
- 1a, Carey PlaceGrade II
- The One Crown Public HouseGrade II
- Watford PlaceGrade II
Streets in the conservation area
Streets with listed buildings inside the boundary. Boundaries often split a street — check your exact address.
The council’s appraisal
WEBHigh Street and King Street Conservation Area AppraisalWatford 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 Watford Borough Council and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.