All prices shown are guide prices. Final pricing depends on various factors including ground conditions, access, sloping ground, and complex base requirements.
No VAT is added to the guide prices shown.
We can often provide a quote based on photographs you send us. However, for sloping ground situations or more complex bases, a free site visit may be required to give you an accurate estimate.
| Size | Price |
|---|---|
| 8' x 6' 2.4m x 1.8m 48 ft² / 4.46 m² | £695 |
| 10' x 6' 3m x 1.8m 60 ft² / 5.57 m² | £825 |
| 10' x 8' 3m x 2.4m 80 ft² / 7.43 m² | £965 |
| 12' x 8' 3.6m x 2.4m 96 ft² / 8.92 m² | £1,075 |
| 12' x 10' 3.6m x 3m 120 ft² / 11.15 m² | £1,195 |
| 14' x 10' 4.2m x 3m 140 ft² / 13.01 m² | £1,295 |
| 16' x 10' 4.8m x 3m 160 ft² / 14.86 m² | £1,445 |
| 18' x 10' 5.4m x 3m 180 ft² / 16.72 m² | £1,565 |
| 20' x 10' 6m x 3m 200 ft² / 18.58 m² | £1,695 |
Steel reinforcement and DPM are extras if recommended or requested.
Learn more about Concrete Bases →| Size | Price |
|---|---|
| 9' x 5' 2.7m x 1.5m 45 ft² / 4.18 m² | £620 |
| 9' x 7' 2.7m x 2.1m 63 ft² / 5.85 m² | £795 |
| 11' x 7' 3.3m x 2.1m 77 ft² / 7.15 m² | £945 |
| 11' x 9' 3.3m x 2.7m 99 ft² / 9.20 m² | £1,065 |
| 13' x 9' 3.9m x 2.7m 117 ft² / 10.87 m² | £1,235 |
| 13' x 11' 3.9m x 3.3m 143 ft² / 13.29 m² | £1,355 |
| 15' x 11' 4.5m x 3.3m 165 ft² / 15.33 m² | £1,485 |
| 17' x 11' 5.1m x 3.3m 187 ft² / 17.37 m² | £1,645 |
| 19' x 11' 5.7m x 3.3m 209 ft² / 19.42 m² | £1,785 |
| 21' x 11' 6.4m x 3.3m 231 ft² / 21.46 m² | £1,895 |
Supported on concrete or composite posts which are concreted into the ground
| Size | Price |
|---|---|
| 8' x 6' 2.4m x 1.8m 48 ft² / 4.46 m² | £840 |
| 10' x 6' 3m x 1.8m 60 ft² / 5.57 m² | £985 |
| 10' x 8' 3m x 2.4m 80 ft² / 7.43 m² | £1,195 |
| 12' x 8' 3.6m x 2.4m 96 ft² / 8.92 m² | £1,375 |
| 12' x 10' 3.6m x 3m 120 ft² / 11.15 m² | £1,585 |
| 14' x 10' 4.2m x 3m 140 ft² / 13.01 m² | £1,820 |
| 16' x 10' 4.8m x 3m 160 ft² / 14.86 m² | £1,995 |
| 18' x 10' 5.4m x 3m 180 ft² / 16.72 m² | £2,195 |
| 20' x 10' 6m x 3m 200 ft² / 18.58 m² | £2,415 |
Choose installed ground screws with the frame supplied by others, or a complete installation with a timber frame fitted by JustBases.
| Size | Installed Ground Screws Frame by others | With Timber Frame |
|---|---|---|
| 8' x 6' 2.4m x 1.8m 48 ft² / 4.46 m² | £1,180 | £1,650 |
| 10' x 6' 3m x 1.8m 60 ft² / 5.57 m² | £1,220 | £1,700 |
| 10' x 8' 3m x 2.4m 80 ft² / 7.43 m² | £1,280 | £1,750 |
| 12' x 8' 3.6m x 2.4m 96 ft² / 8.92 m² | £1,340 | £1,800 |
| 12' x 10' 3.6m x 3m 120 ft² / 11.15 m² | £1,400 | £1,850 |
| 14' x 10' 4.2m x 3m 140 ft² / 13.01 m² | £1,460 | £1,900 |
| 16' x 10' 4.8m x 3m 160 ft² / 14.86 m² | £1,500 | £2,050 |
| 18' x 10' 5.4m x 3m 180 ft² / 16.72 m² | £1,550 | £2,250 |
| 20' x 10' 6m x 3m 200 ft² / 18.58 m² | £1,600 | £2,450 |
Shaped foundations
Each common corner footprint uses the same guide price as the nearest equivalent rectangular area.
| Nominal size and area | Concrete | Timber frame | Installed screws | Screws + timber frame |
|---|---|---|---|---|
| 7' x 7' 2.1m x 2.1m 49 ft² / 4.55 m² | £695 | £840 | £1,180 | £1,650 |
| 8' x 8' 2.4m x 2.4m 64 ft² / 5.95 m² | £825 | £985 | £1,220 | £1,700 |
| 9' x 9' 2.7m x 2.7m 81 ft² / 7.53 m² | £965 | £1,195 | £1,280 | £1,750 |
| 10' x 10' 3m x 3m 100 ft² / 9.29 m² | £1,075 | £1,375 | £1,340 | £1,800 |
Common garden-building shapes
These guide prices are 25% above the comparable rectangular-area price and are rounded to the nearest £5.
Hexagonal and octagonal sizes are nominal width-by-depth budgeting sizes. The final quotation follows the garden-building manufacturer's exact base plan.
| Nominal size and area | Concrete | Timber frame | Installed screws | Screws + timber frame |
|---|---|---|---|---|
| 6' x 6' 1.8m x 1.8m 36 ft² / 3.34 m² | £705 | £870 | £1,425 | £2,000 |
| 8' x 8' 2.4m x 2.4m 64 ft² / 5.95 m² | £1,065 | £1,285 | £1,540 | £2,140 |
| 10' x 10' 3m x 3m 100 ft² / 9.29 m² | £1,370 | £1,765 | £1,690 | £2,260 |
| 12' x 12' 3.6m x 3.6m 144 ft² / 13.38 m² | £1,655 | £2,320 | £1,835 | £2,415 |
| Nominal size and area | Concrete | Timber frame | Installed screws | Screws + timber frame |
|---|---|---|---|---|
| 6' x 6' 1.8m x 1.8m 36 ft² / 3.34 m² | £705 | £870 | £1,425 | £2,000 |
| 8' x 8' 2.4m x 2.4m 64 ft² / 5.95 m² | £1,065 | £1,285 | £1,540 | £2,140 |
| 10' x 10' 3m x 3m 100 ft² / 9.29 m² | £1,370 | £1,765 | £1,690 | £2,260 |
| 12' x 12' 3.6m x 3.6m 144 ft² / 13.38 m² | £1,655 | £2,320 | £1,835 | £2,415 |
"Don't be dissatisfied by shabby work from cheap quotes, pay that tiny bit extra and get a professional job done well."
— Paul Leister, Broadstone
"Very polite and accommodating even when we asked something to be charged did it with no grumbles."
— Verified Reviewer, SO31
"Craig was always on time and did a very good job for agreed price."
— Verified Reviewer, BH11
Contact us for a bespoke quote tailored to your project requirements.