Flood Risk Assessments
FRAs for sites in Flood Zones 1-3, from single plots to major schemes.
Learn more Sector Focus
Engineering Services for Housing
We support housebuilders, residential developers, and housing associations with the flood risk, drainage, and environmental evidence needed to secure planning — from single extensions to 350-home schemes.
New-build Extensions Estate Drainage Housing Associations
How we help
Flood risk and drainage for every housing scale.
Whether your site is in Flood Zone 1 or 3, we deliver the FRA, SuDS strategy, and environmental evidence that LLFAs, SABs, and planning authorities expect. We also handle nutrient neutrality where catchments demand it.
- FRAs for sites in Flood Zones 1, 2, and 3
- SuDS strategies designed for LLFA and SAB adoption
- Nutrient neutrality assessments and mitigation
Our Approach
From due diligence to detailed design.
-
Due diligence
We screen flood risk, drainage constraints, and environmental sensitivities.
-
Planning package
We deliver FRA, drainage strategy, and nutrient budget for submission.
-
Authority liaison
We engage the EA, LLFA, and SAB to resolve queries and secure approval.
-
Detailed design
We produce construction-ready drainage and infrastructure drawings.
Services
Services we deliver for housing projects.
Surface Water Drainage
SuDS strategies designed for LLFA and SAB adoption on residential sites.
Learn moreNutrient Neutrality
Nutrient budgets and mitigation strategies for sensitive catchments.
Learn moreCase Studies
Projects in this sector
residential
Appeal Allowed for Retrospective Pond Development
Detailed hydraulic modelling demonstrated that an enlarged retrospective pond reduced flood risk, convincing the planning inspector to allow the appeal against an enforcement notice.
residential
Capital Gate, Ilford
Navigated complex surface water risks and Sequential Test changes to secure planning approval for a residential redevelopment in a Critical Drainage Area.
residential
SuDS Strategy for Major Housing Development
Designed a comprehensive SuDS scheme for 350 homes, achieving SAB adoption-ready standards and reducing underground storage by 40%.
Insights
Related reading
technical insight
Flood Risk Assessment for a Single Dwelling: What You Need to Know
Building a single house and need a flood risk assessment? Here's when one is required, what it should cover, and how to get planning approval in a flood zone.
technical insight
SuDS Hierarchy Explained: A Developer's Guide
The SuDS hierarchy is fundamental to drainage design for planning applications. This guide explains each level, how to apply it, and common pitfalls to avoid.
technical insight
Can I Write My Own Flood Risk Assessment?
Wondering if you can write your own FRA for a planning application? Technically yes for minor works — but here's what you need to know before you try.