Garden room guides
Every number in these guides is computed by the same parametric engine that produces our buildable Build Packs - designed, priced and checked, not estimated.
Cost by size
3m × 2.4m · 3.6m × 3m · 4m × 3m · 5m × 3m · 5m × 4m · 6m × 3m · 6m × 4m · 7m × 4m
Planning permission
The 2 m / 3 m rule · The 2.5 m boundary cap · 15 m² and 30 m² thresholds
Base types
Ground screws · Concrete slab · Concrete pad foundations + bearers
Twenty Paces is a planning aid, not professional structural or planning advice. Costs are materials-only at indicative merchant rates (excluding labour and delivery); span tables, U-values and regulations thresholds are indicative. Verify your design with a structural engineer, your local planning authority and Building Control before you build.