Cost guide
How much does a garden room cost?
A bespoke room, priced on the design and specification rather than a catalogue. Here is what shapes it.
In short
A bespoke garden room is built for the site and to last, so there is no off-the-shelf price: the cost depends on the size, the insulation and glazing, the services run to it, and the cladding. A kit looks cheaper on paper, but it is sized and finished to a catalogue, not your garden. We design the room for the space and set out the cost clearly in the proposal.
Indicative ranges
What you can expect to pay
Figures are relative, not quotations. Each scheme is priced after a survey.
| Why | What shapes the cost |
|---|---|
| Office, studio or gym | Size and use |
| What makes it usable year round | Insulation and glazing |
| Power, data and heating run out to it | Services |
| The foundation it sits on | Base and groundworks |
| The look and the longevity | Cladding and finish |
Source: Gardenscape. Figures as of 2026-06-01.
What changes the price
The factors that move the figure
A garden room is priced on its specification, not its floor area alone. A compact, simply-finished office and a large, highly-glazed studio with full services are very different builds, even at the same size. The cost is driven by the things you cannot see as much as the ones you can: the insulation and glazing that make it usable in January, the power, data and heating run out to it, and the base it sits on. Cladding and finish then set the look. A kit will always look cheaper up front. But a kit is sized and finished to a catalogue, not your garden, the light or the way you will use it. A
Common questions
Common questions
A kit is cheaper up front, but it is sized and finished to a catalogue, not your garden. A bespoke room is designed for the space, the light and the use, and built to last, which is where the long-term value is.
Often, once the floor area is over 15 square metres near a boundary, over 30 square metres, or if it has sleeping accommodation. We design to comply.
A well-built, insulated room used as an office or studio is a genuine asset, but the exact effect on value depends on your property and market, so we would not put a figure on it.
Arrange a consultation
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