Winchester's Finest Garden Base Installers. 10-Year Gtee.
Serving England's ancient capital. Expert base installation on chalk downland, from historic St Cross to the South Downs National Park (SO22 & SO23).
Foundation Experts for Winchester's Unique Chalk Geology.
Winchester sits on chalk bedrock—England's major aquifer. While this creates well-drained, stable ground with excellent bearing capacity, proper preparation is essential. Our team understands how to work with chalk foundations, ensuring your garden building sits perfectly level on this historic landscape. From grand properties near the Cathedral to village homes in Twyford and Colden Common, we deliver bases that last.
A Flawless Foundation in 3 Simple Steps
Get in Touch
Send us your measurements or give us a call. For complex projects on sloping chalk hillsides or restricted access in Winchester's historic streets, we offer free site surveys.
Receive Your Quote
We provide a clear, fixed-price quote with no hidden costs. Honest pricing from a family business serving Hampshire for over 50 years.
Flawless Installation
Our expert team installs your base—often in just one day—leaving your garden immaculate. We respect Winchester's beautiful properties.
The Right Base for Winchester Gardens
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Poured Concrete
The ultimate rock-solid foundation. Perfect for heavy garden rooms or hot tubs. Chalk geology provides excellent drainage, and we ensure proper compaction for a lasting base.
Explore Concrete Bases
Raised Timber Frame
The smart solution for sloping ground. Many gardens on Winchester's chalk hillsides have gradients; this creates a level platform without massive excavation.
Explore Timber Frame Bases_1768039694155.CrOLEM4N_1XJ4xe.webp?dpl=dpl_CzB1qc7Ad56BFEqcdg9Ht1DrJXZ7)
Slabbed Base
Neat, durable, and permeable. The classic choice for greenhouses and sheds in residential gardens across St Cross, Weeke, and Stanmore.
Explore Slab Bases
Ground Screw Base
Eco-friendly and adaptable. Ideal for gardens on Winchester's chalk hillsides and near St Cross where tree protection and slope adaptation matter.
Explore Ground ScrewsSpecialist Foundations For Any Application
Need a Shed Base in Winchester?
Ground screws, concrete, timber frames - see all your options for Winchester gardens.
Need a Greenhouse Base in Winchester?
Perfectly level, drainage-ready bases for greenhouses of all sizes. Slabs, concrete, or ground screws.
Expert Advice for Winchester Properties
"Hi, I'm Craig. I've been working in groundworks across Hampshire for over a decade, and my family has been in the trade since 1970. Winchester's chalk geology offers excellent drainage and stability—but it requires the right approach. If you're planning a garden room, shed, or hot tub base in the Cathedral city or surrounding villages, just give me a call. I'll give you honest advice backed by over 50 years of Phillips family experience."
Why Choose JustBases in Winchester?
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Chalk Geology Experts
We understand Winchester's unique chalk bedrock and how to create stable, long-lasting foundations on this well-drained ground.
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10-Year Guarantee
We offer a rock-solid written guarantee on both materials and labour—peace of mind for your investment.
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Historic Property Experience
From period gardens near the Cathedral to village homes in Twyford, we work sensitively with Winchester's heritage.
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Respectful & Tidy
We treat your property with the utmost respect. Your garden will be left immaculate after we finish.
Trusted Across Hampshire
JustBases is the specialist evolution of Phillips Groundworks. Craig Phillips continues the family tradition, and we're proud to be the sister company of Sunset Developments. Our reputation is built on 50 years of family history serving communities across Dorset and Hampshire.
"The team are extremely hard working but most important to me is the quality of their workmanship. The fencing looks amazing and the cabin base was spot on in terms of dimensions and perfectly level. I would highly recommend."
— Verified Reviewer, SO53
"From estimate to completion of work, the whole experience was a pleasure."
— Verified Reviewer, SO30
Family Heritage
The evolution of Phillips Groundworks — 50 years of high-quality foundations across Dorset & Hampshire.
Ready to Build on a Solid Foundation?
Get your free, no-obligation quote today.
Common Questions from Winchester Homeowners
JustBases Winchester.
Serving Winchester City Centre, St Cross, Stanmore, Weeke, Littleton, Compton, Twyford, Colden Common, Hursley, Kings Worthy, Headbourne Worthy, and all SO22/SO23 postcodes.