6×4m Garden Room
Premium Garden Room for Ambitious Projects
Overview
At 24m², the 6×4m is a proper room that rivals many spare bedrooms. This size opens up possibilities for commercial use, large studios, or multi-function spaces.
What it's great for
Furniture & layout
At this size you can genuinely divide the space — a reception area and treatment room, or a working zone and a comfortable seating area. The 4m depth adds a sense of proper roominess.
Planning permission
At 24m², you will almost certainly need building regulations approval for structural, insulation, and electrical work. Some councils may also require planning permission depending on your property — always check.
Build timeline
6–8 weekends. This is a serious build and benefits from having a helper for frame-raising day.
Key materials
- ✓~120 linear metres of 4×2 CLS timber
- ✓24m² of EPDM roofing membrane
- ✓26 sheets of 18mm OSB
- ✓24m² of PIR insulation
- ✓48 linear metres of cladding
For exact quantities and a full materials list, see the Build Pack.
Estimated DIY cost
Standard spec, with electrics — materials only
Your DIY Cost Estimate
Materials only — does not include your time
Professional cost is an estimate based on typical UK contractor rates (approx. 2.75× materials). Actual quotes will vary.
Try the full calculator to adjust spec and extras.
Free build checklist
Get our material checklist and build timeline free.
Other size guides
Ready to build your garden room?
Get the complete DIY build pack — full plans, materials list, and step-by-step guides for £49.