Price estimator
What will your garden room cost?
Move the sliders to your size and see a real price straight away — no email, no phone call, no waiting.
Width5.0 m
3 m8 m
Depth3.0 m
3 m6 m
Wall height2.5 m
Planning permission — not usually needed. Behind the house, single storey and eaves at 2.5 m or under, a garden room in Wales normally falls under permitted development — whatever its floor area. Within 2 m of a boundary the whole structure has to stay under 2.5 m. Read the rules →
Building regulations — at 15 m² you're in the 15–30 m² band. Regulations are waived if the room sits at least a metre from every boundary, or is built of substantially non-combustible materials. We check both on the site visit. Read the rules →
Estimated price
£21,000
including VAT · 15 m² · £1,400 per m²
Room and base£16,800
Electrics — 5 sockets, 9 downlights£2,500
2 m French doors, PVC£1,800
One thing we can't price from here: the armoured cable run from your consumer unit out to the room, at £50 per metre. We measure that on site.
Footprint
15 m²
Build time
2–4 weeks
Guarantee
10 years
What that price covers
- Insulated base and foundations
- Insulated wall structure
- Insulated floor with LVT flooring
- Plastered and painted throughout
- Roof, including overhang
- External composite cladding
- 2 m French doors in PVC, choice of colours
- Consumer unit with surge protection
- 5 double sockets — one in each corner, one high level for the TV
- 6 LED downlights inside, 3 under the overhang above the door
- 2-gang dimmer, 2-gang switch, fused spur, electrical test and certificate
Not included
- Armoured cable run from your consumer unit (£50 per metre)
- Upgraded glazing — bi-folds, sliders, aluminium frames
- Additional windows
- Heating and air conditioning
- Groundworks on sloping or difficult access sites
Guide prices based on our recent work across Swansea and South Wales. Every garden room is bespoke — your final quote depends on access, ground conditions and the spec you choose. Wider doors, bi-folds, sliders, aluminium frames and extra windows are all available and we'll price those with you.
Cwtch & Canopy · Building across South Wales since 2010