Garden-building foundations across DT11
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 solid start beside the Stour
A riverside garden, a chalk-slope property and a level suburban plot around Blandford Forum can call for different preparation even when the garden rooms are the same size. JustBases compares the building, site and access before recommending a foundation.
Start with the purpose of the room, approximate width and length, and DT11 postcode. Craig will make concrete, ground screws and raised timber easy to compare and confirm the selected work in writing.
What are you planning?
Three easy steps
You bring the idea; we organise the foundation detail.
Call, WhatsApp or send the form with its intended use, rough size and postcode.
Craig discusses the site, visits when necessary and sends a firm written quotation.
The team marks the position and constructs the base ready for the building supplier.
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 and cabins designed to sit across a complete base.
From £695 for 8' × 6' 48 ft² / 4.46 m²
Galvanised steel supports for compatible frames, with focused installation points rather than full-area excavation.
Installed screws from £1,180 for 8' × 6'; frame quoted separately 48 ft² / 4.46 m²
A structural platform for appropriate timber buildings on uneven or gently sloping ground.
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
Share the building type, approximate footprint and DT11 postcode. Craig will help you compare a slab, screws or raised frame and send the agreed Blandford price in writing.
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 Blandford Forum
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
"Excellent service and good quality work cleared up well after completion."
— Verified Customer
Checkatrade · BH20 · 2017-11-07
Work listed by the source: Concrete base for large garden room
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 year-round room needs a stable, accurately sized base beneath its insulated floor, openings and external finish.
Suitable base options
Concrete slab
Continuous support for buildings designed to sit directly above a rigid foundation.
Ground screws with frame
Useful for compatible buildings where reduced excavation or changing levels favour framed support.
Raised timber platform
Can suit selected timber rooms on a modest slope with a planned bearing layout.
Around Blandford, known river water, chalky ground or a stepped garden can each influence the best method; none should be assumed from the postcode alone.
Ask about this base →
A larger cabin should be supported beneath its wall rails and internal bearers, not simply within its outside outline.
Suitable base options
Poured concrete
A dependable option when the supplier specifies a full, level slab beneath the cabin.
Screw-supported grid
Can follow bearer lines through an agreed treated-timber or galvanised-steel frame.
Raised timber
Practical for compatible cabins where the garden fall can be bridged structurally.
If a manufacturer drawing exists, send it when convenient. If not, Craig can begin from the model name and dimensions.
Ask about this base →
Equipment and room use can affect load, vibration, floor stiffness and service requirements below the finished interior.
Suitable base options
Concrete
Often the clearest choice for heavy fitness equipment and concentrated floor loads.
Engineered screw frame
A viable alternative when the frame and floor are specified for the intended loads.
Raised timber
Possible for lighter uses where spans and equipment positions are understood.
Describe the heavy items in plain language; we will identify whether they change the foundation quotation.
Ask about this base →
A pod often relies on a defined chassis or bearer grid that needs coordinated support and sensible clearance from the garden.
Suitable base options
Ground screws and support frame
Often well matched to defined pod supports and a desire to limit soil movement.
Concrete base
Suitable where the pod specification requires a continuous slab or floor-level services.
Raised timber frame
Can suit lighter units with compatible bearers and manageable ground conditions.
For overnight or letting use, confirm the planning and building position separately; the foundation discussion can continue in parallel.
Ask about this base →Local ground context
BGS evidence for the Shaftesbury district and the Blandford neighbourhood-plan evidence describe chalk across much of the area, with alluvium following the River Stour and clay-with-flints on some higher ground. Those settings can behave differently beneath a garden building.
Near-surface conditions are also affected by former structures, filled areas, retaining work and drainage. We compare the actual footprint and planned load rather than calling every DT11 plot chalky.
No specialist report is expected before your first enquiry. Known site history or winter water can simply be mentioned during the conversation.
Access handled with you
Central Blandford properties may have older walls, narrow passages and limited parking, while plots on the approaches to town can be stepped or reached from longer drives. Rural DT11 work can add gates and soft verges to the route.
These details help us select the efficient installation method, but they need not be fully measured before contact. A photograph often resolves the first question; a visit can resolve the rest.
Helpful if you have them—not required before you call:
Useful local guidance
Dorset Council is the local planning authority. Permitted development for an outbuilding depends on use, height, footprint, position and the property's circumstances; the base material does not decide the answer.
Blandford Forum, Blandford St Mary and Bryanston contain conservation areas, and the made Blandford+ Neighbourhood Plan forms part of the development plan. Those sources help with exact properties without making the initial foundation enquiry difficult.
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 businesses offer rooms, cabins or bespoke timber buildings. Ask the chosen supplier for its footprint and foundation detail so the base and building coordinate.
Shaftesbury manufacturer of bespoke timber garden buildings.
Made-to-order rooms and timber buildings from Wimborne.
Bespoke Dorset garden-room designer and builder.
Independent research links only: no endorsement, supplier relationship or compatibility is implied. Confirm current delivery and base specifications directly.
Service area
Our service includes Blandford Forum, Blandford St Mary, Bryanston and neighbouring DT11 communities.
Straight answers
A building type, approximate size and postcode are enough to start.