Do I need planning permission for a garden room?

Most garden rooms are permitted development if they are single storey, under 2.5 metres high near a boundary, and not used as a separate dwelling. Conservation areas and listed buildings have tighter rules.

How much is a garden office for working from home?

A fully insulated, powered garden office of around 3 by 4 metres typically costs £12,000 to £20,000 installed.

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How much does a garden room cost in the UK?

A garden room is priced by size and by how fully it is finished, especially insulation and whether it has power, heating and plumbing.

From

£8,000

Typical

£16,000

Up to

£30,000

installed · typical UK job, 2026

Time on site: 1 to 3 weeks on site once the base is ready

Price your garden room

Adjust for your job and area to get a range.

What's included in the price

Insulated structure, cladding and roof
Base or foundations
Doors, windows and basic electrics
Delivery and installation

What changes the cost

Floor area and ceiling height
Insulation and whether it is for year-round use
Power, heating, broadband and any plumbing
Groundworks and access to the garden

Costs by area

Less location-sensitive than wet trades, but London and the South East still add around 10 to 20 percent.

Common questions

Do I need planning permission for a garden room?: Most garden rooms are permitted development if they are single storey, under 2.5 metres high near a boundary, and not used as a separate dwelling. Conservation areas and listed buildings have tighter rules.
How much is a garden office for working from home?: A fully insulated, powered garden office of around 3 by 4 metres typically costs £12,000 to £20,000 installed.

These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.