Drainage is the part of a site that decides whether the earthworks platform will perform in service, and SGE installs it across housing, commercial, infrastructure and renewable energy projects throughout the UK. Because we deliver drainage alongside our earthworks and ground engineering services, we plan it as part of the same programme rather than as a separate package that arrives after the platform is built. That removes a common source of rework and keeps the site moving.
Most of the drainage problems that show up on finished sites trace back to decisions made during construction. Trenches dug too late, cover levels missed, bedding compromised, or testing skipped under programme pressure. Doing it properly is not difficult; it requires sequencing, supervision and quality checks built into the programme rather than added as an afterthought. That is the standard we work to.
Detailed Service Breakdown
Our drainage scope covers foul and surface water installation, attenuation and SUDS features, outfalls, headwalls and connections, and site-wide drainage strategy implementation. We work to designs produced by the consulting engineer and to adoption standards where the drainage will be taken on by a water authority or local authority.
Modern drainage systems are increasingly complex. Sustainable drainage system (SUDS) features are now a planning requirement on most schemes, with attenuation, infiltration, swales and pollution control all forming part of an integrated surface water strategy. Foul drainage continues to follow well-established standards but with growing scrutiny on water authority adoption requirements. We work to all of it as a matter of routine, with the laboratory and quality records to support sign-off.
Drainage scope we deliver:
- Surface water drainage and SUDS features
- Attenuation tanks, swales and infiltration systems
- Outfalls, headwalls and connections
- Site-wide drainage strategy delivery alongside earthworks
Industries and Sectors We Work With
Drainage is required on every construction project, but the scale and complexity vary by sector. Housing schemes need adoption-standard drainage that the local water authority will take on, which sets out the detail on materials, bedding, testing and recording. Commercial and logistics platforms typically have larger surface water systems with significant attenuation, often involving SUDS features to meet planning conditions. Infrastructure schemes use highway drainage to authority standards. Renewable energy sites need carefully planned surface water management on what are typically large, low-relief platforms. We adapt the installation approach to suit the sector, but the underlying discipline is the same: plan the drainage with the earthworks, not after it.
Our Process and Delivery Method
1. Design review and coordination
We review the drainage design alongside the earthworks design to identify clashes and sequence the works for efficient delivery.
2. Programme integration
Drainage is built into the earthworks programme rather than scheduled afterwards. Trenches are excavated when ground levels suit, not when the platform is finished.
3. Installation
Attenuation features are excavated to design. Bedding, surround and reinstatement are completed to adoption standards where applicable.
5. Handover
As-built drainage records, test results and adoption packs are provided. Connections are sealed and protected ready for follow-on works.
Project Examples
Drainage has been installed across housing schemes, commercial platforms, renewable energy sites and regeneration projects. On most of these, drainage was sequenced into the earthworks programme rather than running as a separate workstream, which reduced overall site duration.
Recent contracts have included, large attenuation systems and SUDS features on logistics platforms where surface water management was a planning condition, and integrated drainage and earthworks delivery on renewable energy sites where the surface water strategy was critical to long-term platform performance. Outfall and headwall construction has been included where the site discharged to existing watercourses or ditches under appropriate consents.
Benefits of Working With SGE
- Drainage delivered as part of the same earthworks programme
- Single contractor responsibility from platform to drainage handover
- Adoption-standard installation for housing and commercial schemes
- Experienced operators across attenuation tank excavation/backfill, surface water and SUDS features
- Owned plant available for rapid trench excavation and reinstatement
- Quality records and adoption packs prepared as a matter of course
Frequently Asked Questions
Do you install drainage to adoption standards?
Yes. We work to the standards of the relevant water authority or local authority and prepare full adoption packs where the drainage will be taken on.
Can drainage be installed alongside earthworks?
Yes, and it usually should be. Sequencing drainage into the earthworks programme reduces rework and saves overall site duration.
Do you install SUDS features?
Yes. Swales, infiltration systems, attenuation tanks excavation and backfill are all within our scope.
Who designs the drainage strategy?
Drainage designs are produced by the consulting engineer on the project. We install to that design and coordinate any constructability input back to the designer.