Garden room with built-in storage

The short answer

Building a store into the end of a garden room, with its own outside door, replaces a separate shed and keeps bikes, tools and the mower out of the living space. The store and the room count together towards the 30 m² limit, so a combined building often makes better use of the allowance than a room plus an old shed.

On this page
  1. Layouts
  2. Planning
  3. Getting it right
  4. Common questions

Layouts

A 6 × 3 m building with a 1.5 m store at one end, drawn to scale:

storedesksofa6 m3 mdoors
  • Side store: a narrow store along one end, with its own door on the side or front. The most common.
  • Rear store: a shallow store behind the room, reached from the side. Good for long, narrow gardens.
  • Bike store: a store at least 1.8 to 2 m deep fits bikes lengthways.

Planning

The store and the room are one garden building for planning purposes. Together with any other sheds, they must be 30 m² or less, and leave 25 m² of garden. Taking down an old shed and building storage into the new room is often how people stay within the limit. See the planning rules.

Getting it right

  • Insulate the wall between the room and the store, so you don't heat the store.
  • Fit a light and a socket in the store, for charging a mower or e-bike. Tell the electrician. See electrics.
  • Ventilate the store so damp tools don't rust.
  • Use a lockable, solid door on the store, with no glass.

Common questions

Does a storage shed attached to a garden room count towards 30 m²?

Yes. All garden buildings at a house count towards one 30 m² total, whether separate or attached. A 20 m² room with a 5 m² store uses 25 m² of the allowance.

Should the storage have a separate door?

Usually. A separate outside door means bikes, mowers and tools never come through the room, and the store doesn't need to be insulated or heated.

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