Garden-building foundations across SP4
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 modern room on a well-planned base
A garden in historic Amesbury, a property near the Avon and a plot around Durrington or Larkhill can differ in chalk depth, water, access and archaeological context. The building's support design remains equally important.
JustBases compares concrete, ground screws and raised timber without expecting you to solve those issues first. Share the room type, approximate size and SP4 postcode to begin with Craig.
What are you planning?
Three easy steps
We keep the first conversation simple and the final foundation scope precise.
Call, WhatsApp or use the form with the intended use, rough size and address.
Craig considers chalk, access and levels and visits if useful before sending the quote.
The footprint is marked and completed ready for the garden 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 foundation for substantial rooms designed for full-area support.
From £695 for 8' × 6' 48 ft² / 4.46 m²
Driven steel support points beneath a compatible frame, with no concrete curing delay.
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 gently falling 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 Craig the building type, approximate footprint and SP4 postcode. We will compare the practical Amesbury 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 Amesbury
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
"Amazing job. Lovely lads and did an excellent job really professional. Tidied up really well. Thank you guys. Would not hesitate in hiring these guys they really helped me out after a disastrous attempt by a neighbour!"
— Ruth, Andover
MyBuilder · SP10 · 2025-10-07
Work listed by the source: Shed base
"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 daily-use room needs accurate support beneath insulation, doors and glazing and a sensible relationship to garden level.
Suitable base options
Concrete
Continuous support for rooms specified for a rigid slab.
Ground screws and frame
Can suit compatible rooms where excavation, slope or programme favours point support.
Raised timber
Useful for selected timber rooms over manageable level changes.
Chalk resistance, Avon water or estate access varies by property; the first conversation focuses on what is true for the intended SP4 footprint.
Ask about this base →
A substantial timber building needs support beneath its walls and internal floor bearers.
Suitable base options
Concrete slab
Suitable where the supplier requires a complete rigid foundation.
Screw-supported frame
Can align supports with an approved cabin bearer grid.
Raised timber platform
Practical for compatible cabins on uneven gardens.
Supplier details are helpful before final set-out but are not required for the first estimate discussion.
Ask about this base →
Equipment and room use can change load, vibration and service requirements at foundation level.
Suitable base options
Concrete base
Often the simplest choice beneath heavy equipment.
Engineered screw frame
Can work when the floor and support grid account for loads.
Raised timber base
Possible for lighter rooms with suitable spans.
Tell Craig what will be inside and we will keep any technical follow-up relevant to price and performance.
Ask about this base →
A pod needs support beneath its chassis or bearer positions and a site route suited to delivery and installation.
Suitable base options
Ground screws and frame
Often suited to clear supports and lower excavation.
Concrete foundation
Appropriate when the unit needs a full slab.
Raised timber platform
Can support compatible lightweight pods.
Sleeping or letting use and the World Heritage setting may alter planning checks; foundation advice can run alongside them.
Ask about this base →Local ground context
The BGS Salisbury memoir places Amesbury on the Chalk margin of Salisbury Plain, with dry-valley deposits and River Avon alluvium creating local changes. Thin soil over chalk can behave differently from made ground or wetter river deposits.
Previous development, service trenches and landscaping add further variation at garden scale. We select the system for the actual building and position rather than promising from the chalk label.
You do not need a ground or archaeological report before first contact. Existing property conditions can be discussed alongside the quotation.
Access handled with you
Amesbury-area access ranges from older side passages and busy roads to military-estate arrangements and wider modern plots. Chalk spoil, previous slabs and buried services can matter at particular sites.
An optional photograph helps plan the route. Craig can visit where access, levels or existing ground need seeing before the price is fixed.
Helpful if you have them—not required before you call:
Useful local guidance
Wiltshire Council is the planning authority. Permitted development depends on the whole building's use, height, position, footprint and property rights—not the base material.
The historic core has a conservation area, while the Stonehenge World Heritage Site and archaeology can matter around Amesbury, Durrington and Larkhill. Apply checks to the exact address without delaying foundation advice.
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 Wiltshire businesses offer rooms, cabins and bespoke timber buildings. Ask for the selected model's exact footprint and support requirement.
Made-to-measure timber buildings across Wiltshire and Hampshire.
Custom timber buildings outside Salisbury.
Bespoke rooms and summerhouses near Salisbury.
Independent research links only. No endorsement, partnership or previous joint work is implied; confirm delivery and base details directly.
Service area
Our service includes Amesbury, Durrington, Larkhill and surrounding SP4 areas.
Straight answers
A building type, approximate size and postcode are enough to start.