Garden-building foundations across SP7
Ground screws, concrete and raised timber-frame bases for garden rooms, offices, cabins and substantial garden buildings—with clear prices and a full 10-year guarantee.
Illustrative garden-room example
A level foundation on a hill-top site
A level garden on the plateau and a stepped plot near the escarpment may need very different preparation, retaining and access plans. The chosen building also needs support at the places its floor and walls carry load.
JustBases compares poured concrete, ground screws and raised timber without assuming one answer for SP7. Share the room type, approximate dimensions and postcode and Craig will explain the practical choices.
What are you planning?
Three easy steps
You describe the building and garden; we organise the useful foundation detail.
Tell us what the room will be used for, its rough footprint and location.
Craig considers slope, drainage and access, visiting when the site needs seeing.
The footprint is marked and completed to the required level for the building.
Choose the foundation, not the complication
You do not need to choose one now. We compare the building, garden and access, then explain the simplest suitable option.
A continuous rigid slab for substantial rooms that require support across the full floor.
From £695 for 8' × 6' 48 ft² / 4.46 m²
Driven steel points beneath a compatible frame, often useful where excavation and levels favour focused support.
Installed screws from £1,180 for 8' × 6'; frame quoted separately 48 ft² / 4.46 m²
A treated structural platform for suitable buildings where a garden fall can be bridged cleanly.
From £840 for 8' × 6' 48 ft² / 4.46 m²
Useful guide prices
These are current guide prices for standard installations. The written quotation confirms access, levels, preparation, ground conditions, support layout and any optional DPM or service conduit.
Get your exact written price| Base size | Concrete | Raised timber | Installed ground screws |
|---|---|---|---|
| 10' x 8' 3m x 2.4m 80 ft² / 7.43 m² | £965 | £1,195 | £1,280 |
| 12' x 8' 3.6m x 2.4m 96 ft² / 8.92 m² | £1,075 | £1,375 | £1,340 |
| 12' x 10' 3.6m x 3m 120 ft² / 11.15 m² | £1,195 | £1,585 | £1,400 |
| 14' x 10' 4.2m x 3m 140 ft² / 13.01 m² | £1,295 | £1,820 | £1,460 |
| 16' x 10' 4.8m x 3m 160 ft² / 14.86 m² | £1,445 | £1,995 | £1,500 |
| 20' x 10' 6m x 3m 200 ft² / 18.58 m² | £1,695 | £2,415 | £1,600 |
Ground-screw prices are for the installed screws only. A suitable timber or galvanised-steel support frame can be added to the written quotation. Raised-timber prices use suitable concrete or composite posts. Your quotation confirms exactly what is included.
Easy to start, free to ask
Tell Craig the building type, approximate footprint and SP7 postcode. We will compare the sensible Shaftesbury base options and provide a written quotation.
Talk to Craig about your garden room base
Not sure which base you need? Craig will listen to what you are planning and explain the easiest next step.
Online quote requests are normally answered within 24 hours, excluding weekends.
Just give us your contact details and a short description of what you want to build. We will guide you through the rest.
Your enquiry
Garden room base installation in Shaftesbury
Clear reassurance
The JustBases guarantee covers our installation workmanship and the foundation materials we supply, subject to the written quotation. It is separate from the garden-building supplier's warranty.
Realistic timing
Ground screws are normally installed in one day. Concrete bases are normally installed within two working days, with the next-stage timing confirmed for the project.
Frames available
We can supply a treated timber or galvanised-steel support frame where it forms part of the agreed ground-screw solution.
Genuine feedback on related building-base work
"Craig came to give a quote and completed work within time scale. Very friendly company, very helpful and the job was tidy and looks perfect. Would highly recommend."
— Verified Customer
Checkatrade · KT11 · 2018-06-22
Work listed by the source: Base for log cabin
"A high standard of work and very pleasant lads to deal with. I would not hesitate to recommend them."
— Verified Customer
Checkatrade · BH24 · 2018-01-10
Work listed by the source: Concrete base for workshop
"Good quality work. Prompt, polite, all round good service."
— Verified Customer
Checkatrade · SP7 · 2017-08-14
Work listed by the source: Construction of base for garden shed
Match the base to the space
The building name is only the starting point. We also consider its footprint, support arrangement, intended use and the garden it needs to fit.
A frequently used room needs a level, accurately sized foundation beneath its doors, glazing and insulated floor.
Suitable base options
Concrete
Continuous rigid support for rooms designed around a slab.
Ground screws and frame
Can suit compatible rooms where slope or reduced excavation favours point supports.
Raised timber
Useful for selected timber rooms across manageable changes in level.
On escarpment-side gardens, slope drainage, retaining walls and finished height are worth discussing; plateau gardens may present a simpler but different set of choices.
Ask about this base →
A substantial timber cabin needs reliable support beneath perimeter walls and internal bearers.
Suitable base options
Concrete slab
Suitable where the cabin supplier requires full-area support.
Screw-supported frame
Can coordinate supports with an approved bearer grid.
Raised timber platform
Practical for compatible cabins on stepped gardens.
A supplier base plan helps before installation; approximate size is enough for an initial Shaftesbury discussion.
Ask about this base →
Equipment and use can alter floor load, vibration and service requirements beneath a specialist building.
Suitable base options
Concrete base
Often the most direct response to heavy equipment.
Engineered screw frame
Can work where frame and floor are designed for the loads.
Raised timber base
Possible for lighter uses with suitable support spacing.
Describe the equipment and Craig will identify only the information that affects the foundation price.
Ask about this base →
Pods need correctly positioned support beneath a chassis or bearer grid and a practical relationship with the slope.
Suitable base options
Ground screws and frame
Often suited to defined supports and lower-excavation installation.
Concrete foundation
Appropriate where a full slab is specified.
Raised timber platform
Can support compatible lightweight pods on an agreed grid.
Sleeping or letting use may require separate planning and building checks; the base can be discussed while these progress.
Ask about this base →Local ground context
BGS sheet 313 places Shaftesbury on the Upper Greensand escarpment above Gault and Chalk country, with steep slopes and mapped landslip context in the wider district. A hill-top and an escarpment-side garden should not share one foundation assumption.
Retaining walls, slope drainage, previous terraces and made ground add further site-specific factors. We compare the actual room and footprint instead of prescribing from the town geology.
No geological report is expected before first contact. Share what you know about the slope or previous works and we will explain any proportionate next step.
Access handled with you
Shaftesbury access can involve steep roads, limited parking, old walls and stepped rear gardens. Rural SP7 properties may add narrow lanes, gates and soft verges.
A photograph can show the route and fall. Craig will arrange a visit where unloading, retaining walls or the proposed position need to be understood before pricing.
Helpful if you have them—not required before you call:
Useful local guidance
Whether a garden room is permitted development depends on the complete building and property, including use, height, position and footprint. Foundation type does not decide it.
Much of the built-up town south of the A30 lies in a conservation area, and the made Shaftesbury Neighbourhood Plan is in its first review. Apply current information to the exact address while continuing the base quotation.
Planning information is a practical starting point, not legal or planning advice. Confirm the position for the exact property and building with the relevant authority.
Choosing the building
These Dorset and Wiltshire businesses can help with choosing a room or cabin. Ask for precise outside dimensions and the floor-support plan.
Shaftesbury manufacturer of bespoke timber buildings.
Made-to-order Dorset garden rooms and timber buildings.
Bespoke buildings delivered across Dorset and Wiltshire.
Independent research links only. No endorsement, partnership or previous joint project is implied; confirm current delivery and base details directly.
Service area
Our service covers Shaftesbury and surrounding SP7 villages and rural properties.
Straight answers
A building type, approximate size and postcode are enough to start.