About the DEDHAM Conservation Area
The DEDHAM Conservation Area covers about 41 hectares and was designated by Colchester City Council in 1974. Inside the boundary are 64 listed buildings (4 Grade I, 13 Grade II*, 47 Grade II). The most significant is Old Grammar School and Well House, Grade I. 17 Tree Preservation Order records overlap the area; every other tree here still needs six weeks’ notice before work. 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.
- Old Grammar School and Well HouseGrade I
- Parish Church of St MaryGrade I
- ShermansGrade I
- Southfields the Flemish CottagesGrade I
- 1, High StreetGrade II*
- 5 and 6, High StreetGrade II*
- Brannam CourtGrade II*
- Brook HouseGrade II*
- Dale BrookGrade II*
- Essex Rose CafeGrade II*
- Gould HouseGrade II*
- Great House, High Street, DedhamGrade II*
- Ivy HouseGrade II*
- Marlborough Head Inn and Loom HouseGrade II*
- Shakespeare HouseGrade II*
- The Sun Public HouseGrade II*
- Vale BakeryGrade II*
- Barfields AlmshousesGrade II
- Baytree CottageGrade II
- Block to South East of Weavershed HouseGrade II
- Brook CottagesGrade II
- Church Gate House and Chemist's ShopGrade II
- Coach House to South of Lower ParkGrade II
- Crofter's and Evans and SonsGrade II
Show all 64 listed buildings ↓All 64 listed buildings
- Dairy HouseGrade II
- Dedham HallGrade II
- Dedham HouseGrade II
- Dedham Post OfficeGrade II
- Duchy HouseGrade II
- Dunton's AlmshousesGrade II
- Garden Wall to East of Dedham HouseGrade II
- Garden Wall to Front of Dedham HouseGrade II
- Garden Wall, South of Coach House at South of Lower ParkGrade II
- Hammond BuildersGrade II
- Hewitt Memorial HallGrade II
- Holly Tree HouseGrade II
- House and Shop West of Old ExchangeGrade II
- K6 Telephone Kiosk Outside Old Grammar SchoolGrade II
- Little Garth CottagesGrade II
- London HouseGrade II
- Lower ParkGrade II
- Meadows CottageGrade II
- Memorial CrossGrade II
- Mill HouseGrade II
- Muniment HouseGrade II
- Octagon HouseGrade II
- Old School HouseGrade II
- Outhouse at Rear, South East of Dedham HouseGrade II
- Pennypot Cottage and RamplinsGrade II
- Prince Lane CottagesGrade II
- Shead of DinesGrade II
- Shop West of VicarageGrade II
- South CottageGrade II
- The CompassesGrade II
- The HaywainGrade II
- The Limes Guest HouseGrade II
- The Little HouseGrade II
- The Manse, West of Congregational ChapelGrade II
- The Old ExchangeGrade II
- The VicarageGrade II
- Village Pump and Railed EnclosureGrade II
- Weavershed HouseGrade II
- Westgate HouseGrade II
- Wheelwright'sGrade II
Nearby conservation areas
Boundary and listed buildings from Colchester City Council and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.