STL / NORFOLK & CAMBRIDGESHIRE
Drainage &
underground utilities
Underground water pipe installation, electricity cable ducting and BT telecoms ducting ready for connection, plus Klargester and sewage treatment plant installation.

The essential work beneath the surface.
Get the underground services in place before the next stage of your build. We excavate service trenches, install water supply pipework and lay ducting for electricity cables and BT telecoms, ready for connection. We undertake this work for extensions, individual properties and developments, either as a standalone job or within a full groundworks package. We also install Klargester systems and sewage treatment plants, including the associated excavation and drainage connections.
- Foul and surface water drainage
- Chambers, gullies and internal drains
- Klargester and sewage treatment plant installation
- Attenuation tank installation
- Water supply pipe installation
- Underground ducting for electricity cables
- BT telecoms ducting
- Service trench excavation and backfilling
Pipework and ducts are installed ready for connection by the relevant utility provider or appointed specialist. Share your service plans and site requirements with us.
Discuss drainage or utility installation ↗RELATED WORK

Garboldisham substation
Concrete electrical substation base and associated duct works delivered by STL.

Docking Development
Taking over the groundworks package and carrying it through foundations, drainage and services to block paving, kerbs and finishing works.

Marham Base
Drainage chamber benching and block paving at the Marham base project.
