About the FORTY HILL Conservation Area
The FORTY HILL Conservation Area covers about 120 hectares and was designated by London Borough of Enfield in 1968. Inside the boundary are 40 listed buildings (2 Grade I, 2 Grade II*, 36 Grade II). The most significant is Forty Hall, Grade I. 2 Article 4 directions over the area remove 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.
- Borough wideHouseholder works
- Forty HillHouseholder 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.
- Forty HallGrade I
- Screen Wall, Gateway and North Pavilions to West of Forty HallGrade I
- Capel HouseGrade II*
- Stable Building to the Hermitage the HermitageGrade II*
- 70-76, Forty HillGrade II
- Barns to Forty Hall Farm (to West of Forty Hall) Walls to Forty Hill Farm (to West of Forty Hall)Grade II
- Bridge Over New RiverGrade II
- Dower House and Atherton HouseGrade II
- East Lodge at Bulls Cross the Gate House West LodgeGrade II
- Elsynge Cottage Elsynge HouseGrade II
- Forecourt and Garden Walls to the HermitageGrade II
- Forty Hall Entrance GatewayGrade II
- Forty Hill HouseGrade II
- Garden Wall to Dower HouseGrade II
- Garden Walls and Railings to LongbourneGrade II
- Garden Walls to East of Capel HouseGrade II
- GarnaultGrade II
- Iron Bridge in the Grounds of Myddelton HouseGrade II
- Lake Terrace in the Grounds of Myddelton HouseGrade II
- LongbourneGrade II
- Maiden's Bridge CottagesGrade II
- Maiden's Bridge CottagesGrade II
- Maiden's Bridge CottagesGrade II
- Maidens BridgeGrade II
Show all 40 listed buildings ↓All 40 listed buildings
- Market Cross in the Grounds of Myddelton HouseGrade II
- Myddelton HouseGrade II
- Sparrow HallGrade II
- Stable Block to North of Myddelton HouseGrade II
- Stable Ranges to West of Forty HallGrade II
- Stables and Former Coach House Range at Capel ManorGrade II
- The OrchardsGrade II
- The Pied Bull Public HouseGrade II
- The Scout Hall (maiden's Bridge Cottages)Grade II
- Wall at East End Near Junction With Forty HillGrade II
- Wall to East of Myddelton House GroundsGrade II
- Wall to West of Number 165 (the Gate House) at Bull's CrossGrade II
- Walls to North of Gough Park CottageGrade II
- Waltham CottageGrade II
- Worcester LodgeGrade II
- Wrought Iron Screen and Railings at End of Forty Hill Near Junction of Clay HillGrade II
The council’s appraisal
PDFFORTY HILL Conservation Area AppraisalLondon Borough of Enfield’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 London Borough of Enfield and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.