The short answer
Groundworks on a UK project typically cost in the region of £5,000–£50,000+, with the wide span reflecting how much the work depends on the site. The foundation element alone commonly accounts for around 10–15% of the total build cost, and that share climbs when the ground is poor. Day labour for groundworkers runs roughly £180–£300 per day in 2026, and inert soil disposal is around £28–£45 per tonne, both higher in London and the South East. The main drivers are your ground conditions, foundation type, site access and the volume of soil excavated and carted away — which is why a measured quote is the only accurate figure.
Groundworks covers everything below and around the foundations — site clearance, excavation, foundations, drainage and the sub-base. Price depends mainly on your ground, your design and your access. The figures below are typical ranges for guidance, not quotations.
Typical UK figures
- Overall project£5,000–£50,000+
- Foundations~10–15% of build cost
- Groundworker day rate~£180–£300 / day
- Inert soil disposal~£28–£45 / tonne
- Biggest variableground conditions
What drives the price
- Ground conditions: poor soil, a high water table or made ground can push costs well beyond an initial estimate, sometimes needing deeper or engineered foundations.
- Foundation type: strip, trench-fill, raft and piled foundations sit at very different price points (see the foundation page).
- Excavation & disposal: you pay to dig and to cart spoil away, so volume, soil type and distance to the tip all matter.
- Access: a tight or sloping site that limits machinery means more time and hand work.
- Region: London and the South East typically add a meaningful premium over the rest of the UK.
| Item | Typical figure | Notes |
|---|---|---|
| Overall groundworks | £5,000–£50,000+ | depends heavily on site |
| Foundations (share) | ~10–15% of build | rises with poor ground |
| Groundworker | ~£180–£300 / day | higher in London & SE |
| Inert disposal | ~£28–£45 / tonne | distance to tip matters |
Indicative UK figures for guidance. Sources: MyJobQuote and Mainline Groundworks cost guides.
Why the range is so wide
No two sites dig the same. The same extension can cost twice as much on clay with a high water table as it does on firm, level ground with easy machine access. Because groundworks is largely about moving earth and pouring concrete, the cost follows the volume of soil removed, the depth and type of foundation, and how easily plant can reach the work. That is why honest guidance gives ranges and why the accurate number only comes from a contractor who has seen the ground.
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Frequently asked questions
How much do groundworks cost in the UK?
Typically £5,000–£50,000+ depending on the project, with the foundation element commonly making up around 10–15% of the total build cost. The wide range reflects how much groundworks depends on your ground conditions, foundation type and access.
Why are groundworks quotes so different?
Because sites differ. Ground conditions, the volume of soil to excavate and dispose of, the foundation type and how easily machinery can reach the work all move the figure. A measured quote on your site gives the accurate number.
What does groundworks include?
Generally site clearance, excavation and muck-away, foundations, drainage connections and the sub-base or oversite slab — the work below and around the structure before the build above ground begins.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific site. They are guidance, not a quotation.