Simple, transparent garden room pricing in London
One guide rate per square metre, no hidden extras, and a fully itemised quote before any work starts.
Around £1,650 per square metre, from £14,500
The same guide rate applies to garden offices, rooms and studios. Use the slider for a rough figure, then we'll give you a full itemised quote after the free consultation.
Get a rough estimate
Drag the slider to your approximate room size.
Garden room and garden office prices by size
| Size | Example footprint | Typical use | Guide price |
|---|---|---|---|
| 8m² | 4m × 2m | Single-desk office or reading room | £14,500 |
| 10m² | 4m × 2.5m | Compact office, studio or gym | £16,500 |
| 12m² | 4m × 3m | Office for one, or a small guest room | £19,800 |
| 15m² | 5m × 3m | Two desks, or a guest room with seating | £24,750 |
| 18m² | 6m × 3m | Office plus storage, or a family room | £29,700 |
| 20m² | 5m × 4m | Garden lounge, playroom or large studio | £33,000 |
| 25m² | 5m × 5m | Multi-use room, or a studio with a shower room | £41,250 |
Based on our guide rate of about £1,650 per m², with a minimum project charge of £14,500. Extras such as a shower room, underfloor heating or air conditioning are quoted separately. Every quote is itemised after a free design visit.
Four things that move the final figure
Size & layout
Larger rooms and more complex layouts, multiple desks, a shower room, a kitchenette, cost more per project, though not always per square metre.
Access to your garden
Narrow side access, steps or a shared passageway can affect the build, though we plan around most access constraints as standard.
Cladding & finish
Your choice of external cladding and internal finish, from natural timber to painted composite, sits at different price points.
Extras
Underfloor heating, air conditioning, a green roof, or acoustic upgrades are quoted separately and itemised in your quote.
What's included in every price
Pricing questions, answered
Is there a deposit?
Yes, a deposit secures your build slot and design time, with the balance due in stages tied to progress on-site. The full schedule is set out clearly in your written quote before you commit to anything.
Are there any hidden costs?
No. Every quote is itemised, covering the structural build, electrics, your chosen finish and any extras you've asked for. If something changes once building starts, we agree the cost with you before doing the work.
Does the price include VAT?
We'll confirm this clearly in your written quote, along with everything else that's included, so there are no surprises at the end.
How much does a 3m × 4m garden room cost?
A 3m × 4m room is 12m², so at our guide rate of about £1,650 per m² it comes to around £19,800. A 5m × 3m room (15m²) is around £24,750. The size table above covers more sizes, and your itemised quote confirms the exact figure.
Do I need to budget for planning permission?
Usually not, because most garden rooms are permitted development and need no application. If yours does, for example in a conservation area or for a flat, we prepare the application and the council charges its standard fee. Our planning permission guide explains when an application is needed.
How far in advance do I need to book?
It depends on the time of year, but as a guide, allow a few weeks between your design being finalised and a build slot becoming available.
Ready to design your garden room?
Free, no-obligation design consultation, we'll talk you through what's possible for your space.
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