Foundations and Groundworks in London
Everything built sits on its foundations, so groundworks set the quality of the whole project. We carry out excavation, foundations and groundworks across London for extensions, garden rooms, walls and drainage — with in-house design support where the ground needs it.
What the service can include
- Excavation and disposal of spoil
- Strip, pad and raft foundations
- Concrete oversites and ground floor slabs
- Drainage installation and connections
- Site preparation and setting out
Suitable projects
- Foundations for extensions and garden rooms
- Bases for outbuildings, walls and hardstanding
- Drainage runs for new bathrooms and extensions
- Underpinning where existing foundations need support
How the work runs
- 1
Enquiry and site visit
Tell us about the work. For most projects we arrange a visit to see the property and discuss what you need.
- 2
Quotation
We agree the scope, materials and price with you in writing before any work starts.
- 3
Planning and scheduling
We agree a start date and sequence of work, and order materials in good time.
- 4
The work
Preparation, installation or construction, and finishing, carried out tidily and with respect for your home.
- 5
Handover
We walk through the finished work with you, clear up and make sure you are happy before we leave.
What can affect the quotation
- Drawings of the proposed work, if available
- The site address and access arrangements
- Details of nearby trees and existing drainage
- Any known ground conditions or previous site history
Materials and finish options
- Excavations to the designed depths and widths
- Concrete foundations poured and finished
- Drainage installed to the agreed layout
- Building control inspections arranged at the required stages
Exclusions and specialist requirements
Foundation depths depend on actual ground conditions, confirmed when the excavation is open and inspected by building control — unforeseen conditions such as made ground or old drains can affect the work, and we discuss this openly at quotation stage. Design of foundations is available through our in-house structural design service. Work near public sewers may need water authority approval.
Frequently asked questions
- Who decides how deep the foundations go?
- The design sets the intended depth based on the ground conditions and any trees; building control inspects the excavation and confirms it before concrete is poured.
- Do you handle the muck-away and disposal?
- Yes — excavation, spoil removal and disposal are included in the quotation.
- Can you install the drainage at the same time?
- Yes — coordinating foundations and drainage in one groundworks package avoids digging the same ground twice.
Related services
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Tell us what you need and we'll come back to you about a quotation.
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