Planning Advice for Garden Rooms

In the vast majority of cases, no. Garden rooms are classified as outbuildings and fall under Permitted Development rights — meaning no planning application is needed, provided your garden room is in your rear garden, is single storey, doesn’t cover more than 50% of the total garden area (including any other outbuildings), and the total roof height doesn’t exceed 2.5 metres if within 2 metres of your boundary. We design every room with these rules built in from the start, so for almost all of our customers across Warwickshire, Solihull, Birmingham and Coventry, the process is completely straightforward.

Exceptions: Listed buildings and properties in conservation areas may have different rules. Planning permission, where required, is the customer’s responsibility — though we’ll point you in the right direction.

Everything you need to walk in and use your space is included as standard: groundworks, the full structural build, your choice of cladding, bi-fold or French doors, all glazing, internal flooring, plastering, painting in your chosen colour, and a full electrical installation with lights and sockets. There are no hidden extras. Many companies quote a lower headline price and then charge separately for groundworks, plastering or electrics — which quickly closes the gap. With DPM, the price you’re given is the price you pay.

Note: One exception is the mains electrical connection from your house to the garden room — this is handled separately by our trusted local electrician and we manage the whole process alongside you.

The 2.5 metre rule applies when your garden room is within 2 metres of a boundary. In that situation, the total roof height — measured from ground level to the highest point — cannot exceed 2.5 metres. Our standard builds are designed to comply with this, so you can build right up to your boundary if needed. If your room is further than 2 metres from the boundary, a greater roof height is permitted under Permitted Development (up to 4 metres for a dual-pitched roof or 3 metres for other designs).

You can build right up to your boundary — there is no minimum setback distance required under Permitted Development rules. The only rule that applies near boundaries is about height: if your room is within 2 metres of the boundary, the maximum roof height is 2.5 metres. Our threaded rod foundation system means we can position the base precisely where it needs to be, even right to the edge of your garden.

For most garden rooms, building regulations approval is not required for the structure itself. The rules work in three tiers based on internal floor area. Up to 15m²: you can build right up to your boundary with no building regulations approval required (provided the roof is no taller than 2.5m). Between 15m² and 30m²: your garden room must be at least 1 metre from the boundary, or the boundary-facing walls must be made of non-combustible materials — again, no approval needed for the structure. Over 30m²: building regulations approval is required. Two specific situations always require compliance regardless of size: the electrical installation (which must be carried out by a Part P registered electrician — we handle this as standard) and the installation of a bathroom connected to mains drainage.

You can have a toilet or bathroom fitted as part of your garden room, and it doesn’t automatically trigger a planning application. However, connecting to the mains drainage will require building regulations approval for that element of the work. We work with a trusted local qualified plumber and will guide you through exactly what’s needed. The key thing is to raise it early in the design process so drainage routes and connections can be planned from the start.

For most home-based businesses — therapists, tutors, beauty professionals, consultants — a garden room works well as a dedicated professional workspace and is unlikely to need additional planning permission for occasional client visits. If your business generates significant and regular client footfall or deliveries beyond what’s considered incidental to a residential property, your local planning authority may require a formal application. Each council interprets this differently, so if you’re planning to see clients regularly we’d always recommend checking with Warwick District Council or your relevant local authority first.

Permitted Development rights are restricted for listed buildings and may be more limited in conservation areas. If your property falls into either category, we’d recommend contacting your local planning authority to confirm what’s permitted before you commit to anything. We’re happy to discuss your situation and point you in the right direction — just give us a call on 01926 450060.

If your garden room falls within Permitted Development — as the vast majority of ours do — your neighbours cannot formally object to or block the build. Permitted Development is a legal right, not a planning application requiring neighbour consent. That said, we always build considerately and our sites are left tidy at the end of every working day, so the experience for your neighbours is as unobtrusive as possible.