The size and use of a garden room matter for planning; foundation position and depth can matter for party wall notices. A normal garden room is not automatically covered by the Act.
Choose the position before ordering a kit
Mark boundaries, trees, drains, ground levels and neighbouring buildings. Check how the garden room will be accessed, where electricity and drainage will run and whether the roof can be maintained without entering next door's land. Leave space for rainwater drainage and maintenance. A prefabricated supplier's standard foundation detail may not suit sloping or disturbed ground, so ask what site investigation or base specification is actually required.
Check planning rules for the intended use
An incidental garden office or hobby room may be treated differently from self-contained accommodation or a commercial use. Permitted development rules depend on height, position, land coverage and property restrictions; certain properties have limited or no such rights. England and Wales have distinct planning systems. Ask the local planning authority when the proposal is unusual rather than relying only on a manufacturer's ‘no planning needed’ slogan.
Foundations near another property
If ground is excavated close to a neighbouring building, section 6 of the Party Wall Act may require notice when its specific depth and distance conditions are met. A shallow base does not automatically qualify, and merely placing a room near a fence is not enough. Obtain foundation dimensions and compare them with the neighbouring structure and its foundation level. Section 6 notices require technical drawings and are not generated by our current PDF builder.
Boundary fences and walls are different issues
Replacing a timber fence is not itself the same as building a party fence wall under the Act. But constructing a new masonry wall on the line of junction, or carrying out specified works to an existing party fence wall, can raise separate questions. Establish who owns the boundary feature and where the new structure will actually stand before installing posts or a base.
Does this project need a party wall notice?
Most garden rooms do not need a party wall notice solely because they are close to a boundary. A new wall at the line of junction or certain nearby excavation works can change that. Use our informational section 6 guide for excavation questions, not the automated £4.99 document route.
Checklist before work begins
- Draw the garden room and boundaries to scale.
- Confirm intended use, height and any planning restrictions.
- Obtain a foundation specification and check nearby buildings.
- Distinguish fence matters from new masonry and excavation work.
Foundation excavation planned?
Read the section 6 guidance and ask a qualified professional about required drawings. This notice type is not supported by our PDF builder.
Related guides
GOV.UK party wall explanatory booklet ↗ · Party Wall etc. Act 1996 ↗
Last reviewed: 22 October 2026. Information is not a substitute for professional assessment of your project.