How much does a summer house cost?
Summer houses are priced by size and spec, plus the base. Get an indicative figure below.
Summer house vs garden room
- 1Base first
A level, firm base (slab, paving or a timber deck frame) keeps the building sound and dry.
- 2Supply-only vs built
Kits are cheapest if you build them; supplied-and-installed costs more but saves the hassle.
- 3Not a year-round room
A summer house is seasonal. If you want an office or gym you'll use in winter, an insulated garden room is the spec you need.
A summer house dresses a garden nicely for a sale without the cost of a full garden room — just don't oversell it as a year-round space. If the buyer needs an office they can use in January, that's a garden room, and a different budget.
Summer house costs (indicative)
| Type | Description | Indicative cost |
|---|---|---|
| Small timber (supply) | kit | £800 – £2,500 |
| Mid-size supplied & built | on a base | £2,000 – £5,000 |
| Large / better spec | with veranda etc. | £4,000 – £8,000 |
| Base (slab/paving) | extra | £500 – £1,500 |
Summer houses are seasonal, un-insulated garden buildings. For year-round use see the garden room guide.
Frequently asked questions
How much does a summer house cost?+
A small timber summer house costs £800–£2,500 as a kit; £2,000–£5,000 supplied and built on a base; £4,000–£8,000 for a larger or better-spec model. A proper base adds £500–£1,500.
What's the difference between a summer house and a garden room?+
A summer house is a seasonal, un-insulated garden building; a garden room is insulated, wired and usable year-round (as an office, gym or studio) — and costs considerably more.
Related tools & guides
Want to know how these figures are calculated? See our cost methodology.
Cost figures shown are indicative estimates, not quotations. You are responsible for verifying all costs (obtain contractor quotes) and any figures submitted to a lender. ScopeWise is a documentation tool, not financial, tax, structural or planning advice. HMO compliance prompts are guidance only — confirm requirements with your local council, as standards and licensing vary by authority.