Garden rooms have become increasingly popular as home offices, gyms, studios and additional living spaces.
Because many are relatively small and detached from the main house, homeowners often assume that Party Wall matters cannot apply.
That is not always the case.
Whether a Party Wall Notice is required will depend mainly on where the garden room is positioned and how its foundations are constructed.
Building close to the boundary
A garden room positioned near the boundary can potentially raise Party Wall considerations.
If you propose to construct a new wall on the line of junction between your property and your neighbour’s land, the provisions relating to new boundary walls should be considered.
Our guide to Section 1 Party Wall Notices explains the rules where a new wall is proposed either astride or immediately alongside the boundary.
The position will differ depending on whether the wall is proposed:
- wholly on your own land; or
- astride the boundary.
Building astride the boundary generally requires your neighbour’s consent.
What about the foundations?
Excavation can also bring a garden room within the Party Wall etc. Act 1996.
This can become relevant where new foundations are sufficiently close to a neighbouring building and extend deeper than its existing foundations.
Our Party Wall Excavation Explainer provides further guidance on the excavation provisions and the commonly discussed three-metre and six-metre rules.
This is particularly worth checking where the garden room is close to:
- a neighbour’s house;
- an extension;
- a garage;
- an outbuilding; or
- another structure with foundations.
The fact that your garden room is small does not necessarily determine whether the Act applies.
Do lightweight garden rooms need notices?
Some garden rooms are constructed using relatively lightweight foundation systems rather than traditional strip or trench foundations.
Depending on their design and location, these may create fewer Party Wall considerations.
However, the correct approach is to review the actual construction rather than assume that every prefabricated or timber garden room is exempt.
Planning permission and Party Wall matters are separate
Even if your garden room can be constructed under permitted development rights, that does not automatically mean that the Party Wall Act is irrelevant.
Planning legislation and Party Wall legislation deal with different matters.
Check before ordering the building
Garden rooms are often purchased as packaged products with relatively short installation programmes.
It therefore makes sense to establish the Party Wall position before agreeing an installation date.
Simple Survey can help
If you are proposing a garden room close to a neighbouring property or boundary, Simple Survey can review the drawings and foundation details and advise whether Party Wall procedures are likely to apply.
Visit our Party Wall Surveyor service page or send us your plans for clear, practical advice before construction starts.