Drainage & SuDS

Our SuDS & Drainage Services

We offer a full suite of drainage services, including:

• SuDS Strategy Reports for planning submission
• Surface Water Drainage Design using GIS and rainfall catchment modelling
• Drainage Impact Assessments (DIA) for infrastructure and high-risk sites
• SuDS Maintenance & Adoption Plans for long-term performance
• Integration with Flood Risk Assessments (FRA) and site layout
• Regulator Liaison with EA, SEPA, NRW and Lead Local Flood Authorities (LLFAs)

Our designs incorporate permeable paving, swales, attenuation basins, infiltration features, green roofs and engineered storage—tailored to your site and planning authority.

We design SuDS strategies in line with the DEFRA Non-Statutory Technical Standards for Sustainable Drainage Systems (March 2015, updated 2025), the CIRIA SuDS Manual C753 and relevant local authority guidance.

SuDS for Infrastructure & Corridor Projects

We specialise in SuDS and drainage for linear infrastructure schemes, including:

• Route-wide surface water management
• Multi-phase SuDS integration
• Drainage mapping and runoff modelling
• Coordination with flood risk, ecology and permitting teams
• Adoption strategy for long-term maintenance

 
Our team understands the logistics and sensitivities of corridor development—ensuring drainage is managed without compromising progress.

Maintenance & Adoption Planning

Planning authorities increasingly require SuDS maintenance plans to ensure long-term performance. We provide:

• Maintenance schedules and inspection regimes
• Adoption guidance for local authorities or management companies
• Lifecycle cost analysis and asset management input
• Integration with landscape and ecological management plans
• Our maintenance plans follow DEFRA standards and local policy requirements to ensure long-term performance and satisfy planning conditions.