Conservation areas in North Hertfordshire
North Hertfordshire District Council has 44 conservation areas in planning.data.gov.uk; 7,185 homes inside them have an energy certificate, and 44.7% of those are solid-wall homes without wall insulation. The largest by number of homes is Letchworth (2,585). The council does not publish Article 4 areas on planning.data.gov.uk. EPC register November 2026.
| Conservation area | Homes with EPC | Solid walls, no insulation | Gas boiler | Heat pumps | Listed buildings | Article 4 |
|---|---|---|---|---|---|---|
| Ashwell | 352 | 40% | 71% | 11 | 71 | not published by council |
| Ayot St Lawence | 0 | — | — | 0 | 0 | not published by council |
| Baldock | 445 | 29% | 62% | 2 | 99 | not published by council |
| Barkway | 103 | 35% | 81% | 1 | 51 | not published by council |
| Barley | 182 | 11% | 7% | 42 | 59 | not published by council |
| Bendish | 20 | 60% | 5% | 2 | 3 | not published by council |
| Butts Close, Hitchin | 97 | 82% | 96% | 0 | 0 | not published by council |
| Charlton | 11 | 36% | 0% | 1 | 7 | not published by council |
| Codicote | 214 | 31% | 75% | 0 | 30 | not published by council |
| Croft Lane, Norton | 19 | 42% | 89% | 0 | 8 | not published by council |
| Deard's End Lane, Knebworth | 27 | 19% | 100% | 0 | 9 | not published by council |
| Gosmore | 50 | 38% | 66% | 5 | 17 | not published by council |
| Graveley | 41 | 29% | 90% | 0 | 23 | not published by council |
| Great Offley | 82 | 20% | 16% | 3 | 20 | not published by council |
| Great Wymondley | 37 | 35% | 89% | 2 | 13 | not published by council |
| Gustardwood | 0 | — | — | 0 | 0 | not published by council |
| Hexton | 34 | 50% | 0% | 4 | 12 | not published by council |
| Hinxworth | 45 | 22% | 16% | 4 | 19 | not published by council |
| Hitchin | 1,154 | 30% | 62% | 31 | 183 | not published by council |
| Hitchin Hill Path | 14 | 79% | 100% | 0 | 5 | not published by council |
| Hitchin Railway and Ransom's Recreation Ground | 51 | 49% | 94% | 0 | 0 | not published by council |
| Ickleford | 41 | 46% | 100% | 0 | 18 | not published by council |
| Kimpton | 66 | 79% | 89% | 1 | 24 | not published by council |
| Kimpton Bottom | 20 | 30% | 25% | 8 | 5 | not published by council |
| Letchworth | 2,585 | 65% | 86% | 4 | 78 | not published by council |
| Lilley | 33 | 67% | 0% | 3 | 13 | not published by council |
| Newnham | 30 | 40% | 57% | 2 | 11 | not published by council |
| Norton | 71 | 14% | 100% | 0 | 9 | not published by council |
| Old Knebworth | 62 | 37% | 65% | 6 | 30 | not published by council |
| Pirton | 175 | 43% | 84% | 0 | 51 | not published by council |
| Preston | 43 | 12% | 49% | 11 | 20 | not published by council |
| Reed | 51 | 29% | 2% | 5 | 10 | not published by council |
| Roe Green | 27 | 52% | 0% | 2 | 8 | not published by council |
| Royston | 527 | 26% | 44% | 14 | 111 | not published by council |
| Rushden | 20 | 15% | 0% | 1 | 18 | not published by council |
| Sandon | 12 | 8% | 0% | 4 | 12 | not published by council |
| Southern Green | 10 | 30% | 0% | 0 | 8 | not published by council |
| St Ippolyts | 6 | 50% | 0% | 0 | 7 | not published by council |
| Stockens Green Knebworth | 60 | 45% | 98% | 1 | 1 | not published by council |
| Therfield | 55 | 25% | 0% | 3 | 17 | not published by council |
| Wallington | 29 | 21% | 0% | 5 | 20 | not published by council |
| Weston | 115 | 36% | 9% | 8 | 35 | not published by council |
| Whitwell | 122 | 29% | 60% | 0 | 35 | not published by council |
| Willian | 47 | 57% | 96% | 0 | 7 | not published by council |
Areas with at least 30 homes with an energy certificate have their own page. Areas drawn only as a point in planning.data.gov.uk have no boundary, so no homes are counted. England, all conservation areas: 48.7% solid walls without insulation, 66.4% gas boilers.
What needs planning permission in a conservation area
Guides: Heat pumps · Solar panels · External wall insulation · Replacement windows · Am I in a conservation area? Postcode checker