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Garden office cost: what it really costs in 2026
Per m², from timber shell to full fit-out.
£1,800 – £3,960 /m²
A timber garden office starts around £1,800/m². Fully insulated builds run about £2,700/m², and a full fit-out with electrics and finishes around £3,960/m². A typical 3m × 3m office lands £16,000–£36,000.
Price by spec
| Option | What it means | Typical price |
|---|---|---|
| Timber build | Basic shell, summer use | £1,800 /m² |
| Insulated | Year-round working | £2,700 /m² |
| Full fit-out | Electrics, heating, finished interior | £3,960 /m² |
What actually happens
- Base prepared — concrete pad or ground screws
- Frame up and roof on within days
- Insulation, membrane and cladding
- Power run from the house (armoured cable trench)
- Windows, doors and internal boarding
- Electrics, heating, flooring and decoration
Popular choices
Cedar or composite claddingAnthracite aluminium glazingGreen sedum roofs
Regulations to know
- Usually permitted development if under 2.5m tall within 2m of a boundary — and no sleeping accommodation
- Over 30m² internal, or used for sleeping, brings building regulations in
- The power supply is notifiable electrical work under Part P
Tips from the trade
- Spend on insulation — a cold office becomes a shed by November
- Run data with the power cable while the trench is open
Plan this project properly
Get a region-adjusted estimate, track budget against real quotes, and find local tradespeople -- free to browse on Qome.
Start planning on QomePrices on this page are approximate, region-adjusted guide figures built from cross-checked UK cost data. They exist to inform you, not to bind anyone. Actual prices are whatever you and your tradesperson agree, and a difference between a Qome guide figure and a real quote is not a fault in either.