About the Welwyn Conservation Area
The Welwyn Conservation Area covers about 15 hectares and was designated by Welwyn Hatfield Borough Council in 1969. Inside the boundary are 53 listed buildings (1 Grade II*, 52 Grade II). The most significant is Guessens, Grade II*. 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.
- GuessensGrade II*
- (guessens) Milestone on Pavement Abutting Front Wall Near North End of RangeGrade II
- 10, High StreetGrade II
- 11a, High StreetGrade II
- 13 and 15, Mill LaneGrade II
- 13, Church StreetGrade II
- 15, Church StreetGrade II
- 17, Church StreetGrade II
- 2, High StreetGrade II
- 21, Mill LaneGrade II
- 23 and 25, Mill LaneGrade II
- 24, Church StreetGrade II
- 29, High StreetGrade II
- 32, MILL LANE (See details for further address information)Grade II
- 4, High StreetGrade II
- 4, London RoadGrade II
- 40,42, Mill LaneGrade II
- 6-12, Mimram RoadGrade II
- 9, Church StreetGrade II
- AppletreesGrade II
- BakeryGrade II
- Bridge HouseGrade II
- Ebenezer Strict Baptist ChurchGrade II
- Flats 1-7 Wendover LodgeGrade II
Show all 53 listed buildings ↓All 53 listed buildings
- Garden Wall and Barn at Number 1Grade II
- Ivy CottageGrade II
- Little ChequersGrade II
- Little Manor CottageGrade II
- MilepostGrade II
- Mill House and Garden WallGrade II
- OakleighGrade II
- Old Church HouseGrade II
- Parish Church of St MaryGrade II
- ParksideGrade II
- Partly Occupied by the White Hart Public HouseGrade II
- Rose CottageGrade II
- SurgeryGrade II
- SurgeryGrade II
- Telephone KioskGrade II
- The GrangeGrade II
- The Manor House and West ManorGrade II
- The Old ChequersGrade II
- The RectoryGrade II
- The Rose and Crown Public HouseGrade II
- The Rose and Crown Public House,Former Coach House on North Side of Car ParkGrade II
- The VineyardGrade II
- The Wellington Inn HotelGrade II
- The White HartGrade II
- The White Horse Public HouseGrade II
- The White HouseGrade II
- Thody's of WelwynGrade II
- Walls,Railings and Gates to Churchyard of St Mary's Parish ChurchGrade II
- Welwyn Design;r Gunner,Butcher and PoultererGrade 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
WEBWelwyn Conservation Area AppraisalWelwyn Hatfield 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 Welwyn Hatfield Borough Council and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.