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External sewerage and drainage works — Drain and sewer service
Provide a site plan, the affected pipe route and the intended outcome. Explain whether the enquiry follows a defect report or a building alteration, because external drainage requires a defined connection and groundworks scope rather than a generic digging allowance.
Service scope
Agreed work to wastewater pipes and associated access infrastructure outside a building, within a confirmed ownership boundary. The service can include installation, alteration or repair but does not assume authority over a public sewer or private treatment system.
What is normally included
- External wastewater pipework
- Specified chamber and connection works
- Ground and surface reinstatement coordination
What is not included
- Public-network work without authorisation
- Septic or treatment-system servicing by default
Typical tasks
- Review the external drainage layout
- Establish network and site boundaries
- Coordinate ground and buried-service information
- Complete the specified external works
- Record installed routes and reinstatement
What to include in your brief
- Site and drainage plan
- Work objective
- Known pipe and chamber information
- Ground and surface details
- Access and neighbouring constraints
Choosing the right professional
Ask who confirms connection permissions and how buried services, inspection and reinstatement are handled. Compare the same pipe and chamber scope, particularly where one offer omits surface restoration or assumes unrestricted machine access.
Important considerations
- Underground routes may be poorly documented
- Groundworks can affect structures and services nearby
Related services
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