Drainage Contractors London
Drainage contractors for residential, refurbishment, extension and selected commercial projects across London. Crestane Construction can coordinate new foul and surface-water drainage, drainage alterations, gullies, manholes, channel drainage, soakaways, excavation and associated groundworks.
Discuss Your Project Explore Drainage ServicesNeed drainage installed, altered or repaired as part of building works?
Tell us about the property, the drainage problem or proposed works, project location and whether it forms part of an extension, refurbishment, external works or groundworks package.
Drainage coordinated with the surrounding construction
Drainage works often connect several parts of a project: excavation, pipework, chambers, external levels and final reinstatement.
Discuss a drainage project
Provide the main project information below.
Drainage for extensions, refurbishments and external works
Drainage is often one of the first items that needs to be understood when a project changes the layout of a property, adds an extension or alters external levels.
Crestane Construction can coordinate suitable drainage works across London as part of residential, refurbishment, extension, groundworks and selected commercial projects.
The required solution depends on the existing drainage arrangement, proposed use, levels, access, condition of existing pipework and where connections can practically be made.
Suitable packages can include excavation, drainage installation, chambers, gullies, backfill and reinstatement alongside wider construction works.
Drainage installation and alteration across London
The exact scope depends on the property, existing system and proposed construction.
New Drainage Installation
New underground drainage routes for suitable residential and commercial construction projects.
Drainage Alterations
Alter existing drainage routes where building layouts, extensions or external works require changes.
Foul Drainage
Foul drainage pipework and connections coordinated with suitable building projects.
Surface-Water Drainage
Surface-water systems coordinated with roofs, patios, driveways and external areas.
Gullies
Suitable trapped gullies and external drainage points within the agreed project scope.
Manholes & Chambers
Inspection chambers and manhole works where required by the drainage layout.
Channel Drainage
Linear drainage for suitable patios, driveways and property thresholds.
Soakaways & Attenuation
Suitable surface-water solutions can be considered where appropriate to the project design and site conditions.
Drain Repairs
Selected excavation and drainage repair works where the defect and required repair scope are identified.
Levels, falls and connection points need to work together
Underground drainage relies on suitable routes, levels, falls, bedding and connection points. A change in one part of a project can affect the rest of the drainage system.
Crestane can coordinate the construction element around the available drawings, surveys, inspection information and agreed project scope.
Where drainage forms part of a wider extension or external project, it can be sequenced before slabs, patios, driveways and landscaping are completed.
Drainage alterations for house extensions
House extensions often affect existing drainage because new foundations, floor layouts, kitchens, bathrooms or utility areas can conflict with existing pipe runs.
Existing chambers may need to be altered, new connections created or drainage rerouted around the new construction.
Drainage planning should be coordinated before foundations and slabs are completed so underground services are not treated as an afterthought.
For wider extension works, visit our House Extensions London service.
Manage water around patios, driveways and external areas
External construction can change how rainwater moves across a site. New paving, driveways and extensions can increase the amount of hard surface and alter existing falls.
Suitable surface-water drainage may include gullies, linear channels, below-ground pipework or other project-specific measures depending on the design and site.
Drainage should be considered together with finished levels so new external works do not create avoidable ponding or direct water toward the building.
See our External Works London service for wider patio, driveway and garden construction.
What can be included?
The final package depends on the existing drainage, design information, access and surrounding construction.
Expose suitable areas or review existing chambers where needed to understand the works.
Excavate trenches and working areas required by the agreed drainage layout.
Install suitable pipework and supporting material around the agreed drainage system.
Provide suitable external collection points where included in the design.
Install or alter chambers where required by the project layout.
Complete suitable connections to the relevant drainage route where defined.
Backfill relevant trenches and working areas after appropriate checks.
Make good suitable paving, slabs, ground or other surrounding finishes within the agreed scope.
Drainage work benefits from good information before excavation starts
Existing records, survey information and accessible chambers can help define the likely drainage route and reduce unnecessary assumptions.
Existing Drainage
Known chambers, pipe routes and connection points help establish the existing arrangement before changes are planned.
Levels & Falls
Drainage performance depends on suitable levels and gradients along the proposed route.
Surrounding Services
Other underground utilities and site constraints may affect excavation and the available route.
Drainage can be coordinated with wider groundwork packages
Drainage and groundworks are closely linked, particularly on extension, new-build and major external projects.
Excavation for foundations, slabs, services and drainage should be coordinated so the different underground elements do not conflict.
Crestane can consider suitable packages combining drainage with excavation, concrete, foundations and external works.
See our Groundworks London service for wider groundwork projects.
What affects drainage project cost in London?
The total price depends on the drainage length, depth, access, ground conditions, chambers, connections and reinstatement required.
From enquiry to completed drainage works
The exact sequence varies by project, but suitable drainage works can typically progress through these stages.
Send Project Details
Provide the address, photographs, drawings, known chamber locations and details of the proposed drainage works.
Review Scope
Review available drainage information, access, levels and surrounding construction.
Price the Works
Develop the price around excavation, pipework, chambers, connections and reinstatement.
Excavate
Open suitable trenches and working areas for the agreed drainage route.
Install & Check
Complete the drainage installation and suitable checks before relevant areas are closed.
Backfill & Reinstate
Complete suitable backfill and restore surrounding construction included in the package.
Drainage works across residential and commercial projects
What should you send for a drainage quotation?
Existing drawings and photographs help us understand the likely drainage scope before pricing.
Project Address
Send the London property address or postcode.
Photographs
Provide photographs of visible chambers, gullies, affected areas and surrounding access.
Drainage Drawings
Send any drainage layouts, architect drawings or existing service information available.
Known Problem
Explain whether the enquiry is for new work, alteration, repair or a drainage issue.
Access & Ground
Tell us about access restrictions, hard surfaces and areas that may need excavation.
Wider Works
Explain whether the drainage forms part of an extension, patio, driveway or other construction works.
Related Crestane construction services
Drainage within larger construction projects
Drainage contractors across Greater London
Suitable drainage and associated groundwork projects can be considered across Greater London depending on scope, access and programme.
Frequently asked questions
Do you carry out drainage work across London?
Yes. Crestane can consider suitable drainage installation, alteration and selected repair projects throughout Greater London.
Can you install new underground drainage?
Yes. Suitable new foul and surface-water drainage can be included within extension, refurbishment, groundworks and external projects.
Can you alter drainage for an extension?
Yes. Existing drainage can be altered or rerouted where required by the new extension layout and the appropriate project information is available.
Do you install manholes and inspection chambers?
Yes. Suitable chamber and manhole works can be included where required by the agreed drainage layout.
Can you install channel drains?
Yes. Suitable channel drainage can be coordinated with patios, driveways and external areas where required.
Can you install gullies?
Yes. Suitable external gullies can be included within drainage and external works packages.
Can you repair damaged drains?
Selected drain repairs can be considered where the location and required repair scope are sufficiently identified. Additional investigation may be needed where the defect is not yet known.
Can you investigate where a drain runs?
Where the existing route is unclear, additional survey, tracing or CCTV information may be needed before the construction scope can be confirmed.
Can you handle excavation and reinstatement?
Yes. Suitable drainage packages can include excavation, backfill and reinstatement of agreed surrounding areas.
Can you install drainage with a patio or driveway?
Yes. Drainage can be coordinated with suitable patio, paving, driveway and external works projects.
How much does drainage work cost in London?
Cost depends on pipe length, excavation depth, ground conditions, access, chambers, connection points, investigation requirements and the amount of reinstatement needed.
Can you install a soakaway?
Suitable soakaway or surface-water solutions can be considered where they are appropriate to the site and relevant project design or requirements.
Can you coordinate drainage with groundworks?
Yes. Drainage can be planned alongside suitable excavation, foundations, slabs and wider groundwork packages.
Can you do drainage on commercial projects?
Selected commercial drainage and underground service works can be considered depending on the design, access, specification and overall project scope.
What should I send for a quotation?
Send the project address, photographs, any drainage drawings or survey information, details of the problem or proposed work, access information, intended start date and wider construction scope.
Which parts of London do you cover?
Suitable projects can be considered throughout Greater London including Central, North, North West, West, South West, South, South East and East London.