Garden-building foundations across Salisbury
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 sound base in a five-rivers city
A Harnham slope, a Bishopdown garden and a plot close to one of Salisbury's rivers can differ in level, access, ground and water. The historic city's walls, parking and archaeology may also affect individual properties.
JustBases keeps the first step easy. Tell Craig the building type, approximate footprint and SP1 or SP2 postcode and we will compare concrete, ground screws and raised timber.
What are you planning?
Three easy steps
You do not need to arrive with planning, geology or support answers.
Call, WhatsApp or use the form with intended use, rough size and address.
Craig considers slope, water and access and visits where the site needs seeing.
The footprint is set out and completed ready for the approved 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 designed around full-area support.
From £695 for 8' × 6' 48 ft² / 4.46 m²
Driven steel supports beneath a compatible frame, limiting excavation to planned positions.
Installed screws from £1,180 for 8' × 6'; frame quoted separately 48 ft² / 4.46 m²
A treated platform for suitable timber rooms on uneven or sloping Salisbury gardens.
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 us what you want to build, the approximate footprint and Salisbury postcode. Craig will compare the practical systems 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 Salisbury
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
"Good standard of workmanship. Friendly and efficient. Prompt response for estimate and fitted into our timescale. Will be using the firm in future and thoroughly recommend them."
— Verified Customer
Checkatrade · SP6 · 2019-09-16
Work listed by the source: Concrete base for new summerhouse
"From estimate to completion of work, the whole experience was a pleasure. Highly professional team and superb standard of work."
— Verified Customer
Checkatrade · SO30 · 2018-03-19
Work listed by the source: 12 x 8 concrete base for summer house
"Excellent service from start to finish. Chaps were friendly, helpful and hard working, despite having to wheelbarrow each load of concrete a long distance. They did a fantastic, neat job on the concrete foundation, tidied up and checked I was happy."
— adam50834, Salisbury
MyBuilder · SP · 2024-02-26
Work listed by the source: Shed base foundation
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 accurate support under its insulation, doors and glazing, with finished height coordinated to the garden.
Suitable base options
Concrete
Continuous support for rooms designed around a slab.
Ground screws and frame
Can suit compatible rooms where slope, access or reduced excavation favours point supports.
Raised timber
Useful for selected timber rooms on manageable Harnham or suburban falls.
River water, chalk slope or walled access applies to particular Salisbury gardens, not the whole city; Craig focuses on the actual footprint.
Ask about this base →
Large timber buildings need support under perimeter walls and internal bearers at the intended locations.
Suitable base options
Concrete slab
Suitable where the manufacturer requires continuous support.
Screw-supported frame
Can coordinate point supports with an approved bearer layout.
Raised timber platform
Practical for compatible cabins across uneven ground.
A supplier plan is useful before final set-out; approximate dimensions are enough for an early conversation.
Ask about this base →
Heavy equipment, acoustic layers and service routes can alter floor loads and stiffness.
Suitable base options
Concrete base
Often the clearest foundation beneath heavy equipment.
Engineered screw frame
Can work when support and floor account for expected loads.
Raised timber base
Possible for lighter specialist rooms with appropriate spans.
Describe the intended equipment and Craig will keep any extra questions relevant to the quotation.
Ask about this base →
A pod needs support under its chassis or bearers and an installation plan suited to the site and intended use.
Suitable base options
Ground screws and frame
Often suited to clear supports and lower excavation.
Concrete foundation
Appropriate where the unit requires a complete slab.
Raised timber platform
Can support compatible lightweight pods on a structural grid.
Overnight or letting use can change planning and building requirements; foundation advice can continue while those are checked.
Ask about this base →Local ground context
BGS sheet 298 places Salisbury on Chalk and at the confluence of river valleys, with alluvium and terrace deposits interrupting the bedrock pattern. Harnham, Bishopdown and riverside gardens therefore need different questions.
Urban fill, retaining work, old foundations and drainage create further plot-level variation. We select the foundation from the actual building and footprint rather than a city-wide geology label.
No ground report is expected before contact. Share known water, slope or previous work and we will explain any relevant next step.
Access handled with you
Salisbury can involve narrow historic access and parking controls, while Harnham and edge-of-city plots may add steep gardens or longer routes. Rivers and old services may matter at particular addresses.
An optional photograph helps us plan the route. Craig will visit where slope, unloading or the building position needs to be seen.
Helpful if you have them—not required before you call:
Useful local guidance
Permitted development depends on the whole building's use, height, position, footprint and the property's rights. Foundation type does not exempt the room from planning.
The central conservation area, archaeology and five-rivers flood context are relevant to some addresses. Keep checks property-specific and continue the base quotation alongside them.
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 local businesses are useful when selecting a room or cabin. Ask for its exact external footprint and support requirement.
Custom timber buildings made outside Salisbury.
Bespoke rooms, summerhouses and cabins near the city.
Made-to-measure timber buildings across Wiltshire and Hampshire.
Independent research links only. No endorsement, partnership or joint project is implied; confirm delivery and foundation details directly.
Service area
Our service covers SP1, SP2 and surrounding Salisbury neighbourhoods and nearby villages.
Straight answers
A building type, approximate size and postcode are enough to start.