Surrey · GU1, GU2, GU3, GU4
Foundations in Guildford
Foundations are the below-ground concrete structure that transfers the load of a building safely into the ground, with the type — strip, trench-fill or raft — and depth determined by ground conditions, nearby trees and the load of the structure above.
In Guildford, that covers Onslow Village, Merrow, Burpham, Stoughton, Westborough, Charlotteville, Shalford. Guildford is Surrey's county town, with a historic cobbled High Street, a substantial university population, and residential areas ranging from Victorian terraces near the centre to larger detached houses in the surrounding hills, close to the North Downs and Surrey Hills.
Coverage
Areas we cover in Guildford for foundations
Property styles in Guildford
Guildford's housing stock spans Victorian and Edwardian terraces close to the town centre, substantial interwar and postwar detached housing in areas such as Onslow Village and Merrow, and newer developments on the town's edges.
Planning considerations
Guildford Borough Council is the local planning authority. The historic town centre and several residential areas are conservation areas, and parts of the borough fall within the Surrey Hills National Landscape, affecting design and materials for visible extensions.
How it works
Our foundations process
- 01
Site investigation
Checking ground conditions, trial pits where needed, and proximity to trees, drains and existing foundations.
- 02
Design and approval
Agreeing the foundation type and depth, with Building Control approval before excavation for most projects.
- 03
Excavation and formwork
Digging to the approved depth and forming edges ready for concrete.
- 04
Concrete pour and inspection
Pouring concrete to the specified mix and depth, with a Building Control inspection of the open trench beforehand.
Also in this area
Other services we provide in Guildford
Nearby coverage
Foundations in nearby areas
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FAQs
Foundations in Guildford: FAQs
Do you provide foundations across all of Guildford?
Yes, we cover the GU1, GU2, GU3 and GU4 postcode areas in full, including Onslow Village, Merrow, Burpham, Stoughton, Westborough, Charlotteville, Shalford.
How deep do foundations need to be?
Depth depends on ground conditions, the load of the structure and proximity to trees or drains — a straightforward strip foundation might be around 1m deep, but clay soils near mature trees can require significantly deeper trench-fill foundations. This is confirmed by site investigation and agreed with Building Control.
Does Building Control need to inspect the foundations before concrete is poured?
Yes. An open-trench inspection is a standard Building Control stage, carried out once excavation is complete and before concrete is poured, to confirm the ground conditions and depth match what was approved.
Are there conservation areas across Guildford?
Yes, several, including the historic town centre and parts of some residential neighbourhoods. We check the position for your specific address as part of the feasibility assessment.
Get a quote for foundations in Guildford
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Last reviewed 2026-07-28.