Garden-room foundations throughout BH18
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
Start with the room you want
Broadstone gardens range from level suburban plots to wooded sites with mature planting and changing levels. A home office, family room or large cabin may therefore suit concrete, a screw-supported frame or a raised timber platform for different reasons.
JustBases does not expect you to select the system first. Share the building type, approximate dimensions and BH18 postcode; we will explain the suitable choices and put the agreed work into a written quotation.
What are you planning?
Three easy steps
Craig keeps the first conversation simple and brings the technical detail into the quotation only where it matters.
Call, message or use the form with the room type, rough size and Broadstone postcode.
We compare the practical systems, see the garden if useful and provide an itemised written price.
The footprint is marked out and the chosen foundation installed ready for the approved building or frame.
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 traditional continuous slab for substantial rooms that require firm support across the full floor area.
From £695 for 8' × 6' 48 ft² / 4.46 m²
A lower-excavation solution for compatible framed buildings, useful where retaining garden levels and limiting spoil are priorities.
Installed screws from £1,180 for 8' × 6'; frame quoted separately 48 ft² / 4.46 m²
A treated structural platform that can create a level building footprint above a suitable uneven or gently sloping garden.
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 the BH18 postcode. We will make the foundation choice clear and provide a written Broadstone price.
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 Broadstone
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
"Efficient and good standard of work. Very pleasant and professional guys. Would recommend and use again."
— Verified Customer
Checkatrade · BH21 · 2019-04-15
Work listed by the source: Concrete base for garden room
"Craig and Luke were polite, professional and extremely hard working. An excellent service all round. We would highly recommend."
— Verified Customer
Checkatrade · BH14 · 2017-12-11
Work listed by the source: Installation of base for cabin
"Craig extremely courteous throughout. He and team very tidy, efficient and obliging. Would recommend without hesitation."
— Verified Customer
Checkatrade · BH17 · 2017-10-31
Work listed by the source: Base for summer house
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.
Year-round rooms rely on a correctly sized and level foundation so glazing, doors, insulation and the finished floor work together.
Suitable base options
Concrete slab
Strong full-area support for rooms whose floor is intended to bear on a continuous foundation.
Ground screws and frame
A good fit for compatible rooms where access, levels or reduced excavation favour point supports.
Raised timber platform
Practical for an approved timber building needing a level framed base above uneven ground.
Mature Broadstone gardens can make finished height, existing tree roots and the material route worth discussing before one system is selected.
Ask about this base →
A substantial timber cabin needs dependable support beneath its perimeter, floor bearers and internal load lines.
Suitable base options
Concrete base
Ideal when the manufacturer asks for a rigid slab under the complete cabin footprint.
Screw-supported grid
Works for suitable cabins whose bearer plan can transfer loads to a timber or steel grid.
Raised timber frame
Can level an appropriate cabin on a garden with a modest fall or uneven surface.
If you have chosen the cabin, send the model or base plan when convenient. If not, dimensions are enough for an early Broadstone estimate discussion.
Ask about this base →
Specialist rooms benefit from matching the foundation to equipment weight, floor stiffness, acoustic needs and service routes.
Suitable base options
Concrete foundation
Often preferred beneath heavy gym equipment or where a particularly firm full-area floor is required.
Engineered screw frame
Can support suitable specialist buildings when expected loads are incorporated into the frame layout.
Raised timber foundation
Possible for lighter uses where joist spans and local loads are agreed in advance.
Tell Craig what the room will contain, rather than trying to calculate the loads yourself; we can reflect the useful information in the quote.
Ask about this base →
A pod foundation should reflect its chassis, bearer positions, intended use and the conditions beneath the chosen corner of the garden.
Suitable base options
Ground screws plus frame
Often economical in excavation where a pod is designed around clear point or bearer supports.
Poured concrete
Appropriate for heavier pods or designs that specify a complete slab beneath the floor.
Raised timber platform
May suit lighter units where clearance and a level timber support grid are acceptable.
If the pod will be slept in or let, check the intended use separately; JustBases can still help with base choices while that process continues.
Ask about this base →Local ground context
British Geological Survey information for the Bournemouth district and Poole Formation records shows regional sand-and-clay variation around Broadstone. A light garden surface does not demonstrate what sits beneath it, and Broadstone Clay is also recorded locally.
Mature planting, old hardstanding, imported topsoil and previous landscaping can be just as relevant to a garden-building footprint. We use those observations to compare foundation systems rather than making a postcode-wide soil claim.
Customers do not need to commission ground testing before calling. The first step is simply to discuss the room and garden with Craig.
Access handled with you
Broadstone contains established residential plots where hedges, trees, garages and side gates can shape the route to the back garden. A change in level may also influence whether moving concrete materials or installing a framed system is simpler.
These are routine quotation details. One photograph can often answer the initial question, and Craig will arrange a site visit when seeing the route would make the recommendation more reliable.
Helpful if you have them—not required before you call:
Useful local guidance
BCP Council is Broadstone's local planning authority. National permitted development rules look at the complete garden building—its use, height, position and footprint—not the foundation material in isolation.
The made Broadstone Neighbourhood Plan, two local conservation areas and protected-tree records may matter for particular addresses. They are useful checks, not a reason to delay asking JustBases for a foundation 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 nearby businesses are useful independent starting points when comparing the building itself. Ask for the external base footprint and any support specification they provide.
Corfe Mullen business designing insulated garden rooms around Poole and Bournemouth.
Wimborne-based bespoke insulated garden rooms serving Dorset and Hampshire.
Poole-based rooms, office pods and timber garden buildings.
These links are for independent research only. They do not imply endorsement, partnership or previous work together. Confirm delivery and base details directly.
Service area
JustBases serves BH18, Corfe Mullen, Creekmoor, Canford Heath and adjoining neighbourhoods. We can confirm a boundary address from its postcode.
Straight answers
A building type, approximate size and postcode are enough to start.