The short answer
For most homes, a domestic greenhouse is treated as an outbuilding under permitted development, so planning permission is not normally required. The main conditions are that it sits behind the front wall of the house (not forward of it), that eaves are no higher than 2.5m — and the overall ridge stays under 2.5m if any part is within 2m of a boundary — and that outbuildings together cover no more than 50% of the garden. The big exceptions are listed buildings, where listed building consent is normally needed, and conservation areas, national parks and AONBs, where tighter limits apply and you should check with your local planning authority first.
Most greenhouses go up under permitted development with no application needed, but the height, position and garden-cover limits matter — and a few situations need a check first. Here are the rules in plain terms.
The rules in brief
- Most greenhousespermitted development (no permission)
- Within 2m of boundarymax 2.5m overall height
- Positionbehind the front wall of the house
- Garden coveroutbuildings under 50% of garden
- Listed / conservation areacheck the local authority first
When a greenhouse is permitted development
A greenhouse counts as an outbuilding, and the permitted-development rules for outbuildings normally let you put one up without planning permission, provided you meet the limits. The key ones are that it must be behind the front wall of the house; if any part is within 2m of a boundary the maximum overall height is 2.5m; further from the boundary a dual-pitched roof can be taller (with a 2.5m eaves limit either way); and all outbuildings together must not cover more than half the garden. These limits are set by the Planning Portal as general guidance for England — Scotland, Wales and Northern Ireland have their own rules.
When planning rules apply
Permitted development is removed or reduced in some cases. On a listed building, putting up a greenhouse usually needs listed building consent. In a conservation area, national park or AONB, tighter limits apply and you should check with the local planning authority before starting. Permitted development can also be restricted by an Article 4 direction or a planning condition on a newer estate. When in doubt, a quick check with your local planning authority or the Planning Portal confirms your own case before you buy.
| Situation | Permission needed? |
|---|---|
| Standard garden, within the limits | No (permitted development) |
| Within 2m of boundary, over 2.5m high | Yes — exceeds the limit |
| Listed building | Yes — listed building consent (usual) |
| Conservation area / national park / AONB | Check local authority first |
General guidance for England — confirm your own case with your local planning authority. Source: Planning Portal.
Frequently asked questions
Do I need planning permission for a greenhouse?
For most homes, no. A domestic greenhouse is permitted development as an outbuilding, provided it sits behind the front wall of the house, stays under 2.5m overall where within 2m of a boundary, and outbuildings together cover no more than 50% of the garden.
How tall can a greenhouse be without planning permission?
If any part is within 2m of a boundary, the maximum overall height is 2.5m. Eaves must not exceed 2.5m in any case; further from the boundary a dual-pitched roof can be taller. These are general England limits — check your own case with the local planning authority.
When does a greenhouse need planning permission?
Mainly on listed buildings (where listed building consent is usually needed) and in conservation areas, national parks or AONBs, where tighter limits apply. Exceeding the height, position or 50% garden-cover limits, or an Article 4 direction, can also require an application.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific garden and choices. They are guidance, not a quotation.