Extensions
- Part 1, Class ARear extension3 m · 6 m with PAHow far you can build a single-storey rear extension under permitted development in England: 3 m on a semi or terrace, 4 m detached, or 6 m and 8 m with prior approval.Read the rules →
- Part 1, Class ATwo-storey extension3 mWhen a two-storey rear extension is permitted development in England: up to 3 m deep, at least 7 m from the rear boundary, roof and materials to match.Read the rules →
- Part 1, Class ASide extensionHalf the widthPermitted development rules for side extensions in England: single storey, up to 4 m high, no wider than half the original house. Not allowed in conservation areas.Read the rules →
- Part 1, Class DPorch3 m²Permitted development for porches in England: up to 3 m² of floor space, no higher than 3 m, and at least 2 m from a boundary with a road.Read the rules →
Roof
Garden
Energy
- Part 14, Class ASolar panels0.2 m projectionPermitted development for roof solar panels in England: no more than 20 cm from the roof slope and no higher than the roof. Extra rules in conservation areas and listed buildings.Read the rules →
- Part 14, Class GAir source heat pump1 unitPermitted development for air source heat pumps in England: the 37 dB noise limit at the neighbour's window, size limits and where you can't put one.Read the rules →
Outside
- Part 2, Class AFences, walls and gates2 m · 1 m by a roadHow high you can build a fence, wall or gate without planning permission in England: 2 m, or 1 m next to a road used by vehicles.Read the rules →
- Part 1, Class AExternal claddingMatching materialsWhen you can clad or render your house without planning permission in England — materials of similar appearance, and never in a conservation area.Read the rules →
Before you rely on these limits
Conservation areas, Article 4 directions, listed status and old planning conditions can all remove or shrink them.