Drainage for New Builds and Extensions in Crawley
Whether you are building a new home in Crawley or adding a large extension, drainage is one of the first jobs on site and one of the hardest to change later. Planning it properly saves time and money.
Foul and surface water must be kept apart
Foul water from toilets, kitchens and bathrooms goes to the foul sewer or a treatment system. Rainwater from roofs and hard surfaces should go to a soakaway or the surface water sewer. Mixing them is not allowed on new work.
Key steps on a typical project
A well-run drainage package normally includes:
- A drainage layout drawing agreed with Building Control
- Checking whether you are building over or near a public sewer
- Percolation testing if soakaways are planned
- Installing pipes, chambers and inspection points with the correct fall
- Testing the system before backfilling
Working near Gatwick and busy roads
Many Crawley sites are tight and close to busy roads. We plan deliveries, excavations and any road openings carefully so neighbours and traffic are disrupted as little as possible.
Frequently asked questions
Do I need permission to build near a public sewer?
Usually yes. You may need a build-over agreement with your water company.
Can you work alongside my builder?
Yes. We regularly work as the drainage contractor on projects run by builders and developers.