Do You Need Planning Permission For A Garden Room In The UK?

Adding a garden room or outbuilding to your property can be a great way to create extra living space. However, before starting any building work, it’s important to check if you need planning permission. Here’s what you need to know about getting approval for a garden room in the UK:

What counts as permitted development?

  • If your garden room is within certain size limits, you may not need planning permission. Permitted development rights allow you to make some changes to your property without the need for full planning approval.
  • For a garden room or outbuilding, the maximum size to be considered permitted development is 30 square metres if the house is not listed. The building cannot be higher than 4 metres if it has a dual pitched roof, or 3 metres for any other roof type.
  • It must also be a single storey structure and no more than 2.5 metres high to the eaves if it is within 2 metres of the property boundary.

When is planning permission required?

  • If your garden room exceeds the size limits or height restrictions, you will need full planning permission. Listed buildings also require consent for any external changes.
  • Planning permission is also needed if the outbuilding will be used as an independent living space or for commercial purposes requiring change of use. A garden room used as an office or gym just for the occupants doesn’t normally need permission.
  • Any buildings containing a toilet/bathroom, cooking facilities or with plumbing will also require permission as this constitutes a self-contained unit.

Location and appearance considerations

  • The outbuilding cannot be situated in front of the main house and needs to be set back behind the rear wall. Side boundaries must be observed too if it’s located on the boundary.
  • Planning officers will consider how the design, materials and location integrate with the existing house and surrounding area.

In summary, smaller garden rooms within permitted development limits can be built without planning permission. But larger buildings, change of use and listed property requirements will need consent. Always check with your local authority before starting work.

Get a FREE quote

Are you in Norfolk and considering adding a garden room? Get a free, no-obligation quote from our team. We are garden building specialists serving Norfolk and surrounding areas. Tell us your plans and garden size and we will provide a customized quote with prices for your new garden room.

As local experts, we can advise on planning permissions and tailor the perfect solution for your outside space and needs. Whether you need a home office, gym, hobby room or extra living space, we can make your garden room dream a reality!

Call 01603 763189 or email [email protected]



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