About the Great Gaddesden Conservation Area
The Great Gaddesden Conservation Area covers about 10 hectares and was designated by Dacorum Borough Council in 1969. Inside the boundary are 13 listed buildings (1 Grade I, 3 Grade II*, 9 Grade II). The most significant is Church of St John the Baptist, 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.
- 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.
- Church of St John the BaptistGrade I
- Church Farmhouse and StablesGrade II*
- Eastern Barn at Church Farm, 50 Metres South East of Parish ChurchGrade II*
- Glebe HouseGrade II*
- 10 Tombstones Grouped in 2 Rows of 5, 10 Metres and 12 Metres to West of Church Tower in ChurchyardGrade II
- 2/3, Pipers HillGrade II
- 3 Tombstones in Churchyard 12 Metres to North of Church TowerGrade II
- Central Barn at Church Farm, 50 Metres to East of FarmhouseGrade II
- Church CottagesGrade II
- Pipers CottageGrade II
- The 6 Tomb Chests in Churchyard Next Chancel, 5 on East, 1 on SouthGrade II
- Wall With Posting Box Outside Glebe HouseGrade II
- War Memorial Cross in Churchyard 30 Metres to East of ChancelGrade II
Nearby conservation areas
Boundary and listed buildings from Dacorum Borough Council and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.