Professional Flood Risk & Drainage Solutions Across the UK
Fast Turnaround Flood Risk Assessments, Drainage Reports, and Expert Guidance for Planning Applications and Development Projects Across the UK
We provide specialist civil engineering consultancy focused on flood risk, drainage, infrastructure, and environmental design. From planning applications and technical approvals to detailed design and project delivery, we help clients achieve practical, compliant, and cost-effective engineering solutions. Every project we support is shaped by technical expertise, collaboration, and a commitment to delivering high-quality outcomes that stand the test of time.
Our Services
Drainage Design/Strategy
We deliver comprehensive foul and surface water drainage design solutions for developments and strategic road networks. Our work includes the detailed design of drainage pipe layouts, ACO drains, drainage channels, and land drainage pipe systems to ensure efficient water management and long-term sustainability.
Flooding assessment and mitigation
We support clients in navigating planning regulations and managing water-related risks through robust assessments and design of mitigation measures, including soakaways, attenuation systems, and ponds.
Pollution mitigation design
We design innovative systems that protect the environment while meeting CIRIA, DMRB, and EA guidelines. Our designs incorporate sustainable surface water drainage and pollution control features tailored to each project.
We provide detailed Flood Risk Assessments (FRAs) to support planning applications in flood zones and areas vulnerable to surface water flooding. Our assessments identify potential flood risks, evaluate site conditions, and provide mitigation measures that satisfy local authority and Environment Agency requirements.
Flood Risk Assessments
(FRA)
Our SuDS strategies are designed to manage surface water effectively while supporting sustainable development and planning compliance. We create practical drainage solutions that reduce flood risk, improve water management, incorporate water harvesting opportunities, and meet current drainage regulations.
We provide practical drainage strategies for new developments, extensions, and commercial projects, including sustainable water harvesting solutions where appropriate, while making sure the design meets current drainage standards.
Sustainable Drainage Strategy & SuDS Design
Our Clients
Some of the companies we work with use our expertise.
Case Study
Outfall Pollution Assessment, Stafford Gate
Outfall Pollution Assessment for Stafford Gate Development
FRA Morecambe
Site-Specific Flood Risk Assessment (FRA)
Highway Depot
Drainage Design and Pollution Mitigation
M62 Bridge Deck Drainage
Bridge Deck Drainage Design and Compliance
M69 Verge VRS
Drainage Redesign to Support Verge VRS Upgrade
M6 Flood Risk Mitigation
Drainage Renewal Design & Flood Mitigation
NHRR - Source Protection Zone
Groundwater Protection & Drainage Strategy in SPZ
Blacko, Lancashire Drainage Strategy
Drainage Strategy for 20 plot housing development
St Johns Rd - Section 278 Highway Access
Section 278 Highway Access & Drainage Design
Neston, Cheshire. Drainage Strategy (Surface Water & Foul)
We deliver specialist drainage and SuDS design services across diverse sectors.
Homeowners & Landowners
Architects & Designers
Local Authorities
Developers & Contractors
Courous is an engineering company built on the expertise of seasoned professionals. We deliver practical, sustainable, and cost-effective design solutions in:
Drainage pipework, foul drainage, and flood mitigation
Pollution control in line with industry standards (DMRB, CIRIA, HS2, EN, BS, SFA)
Local insight with a national reach
End-to-end design support from concept through to planning and approval
Who We Work With
Customer reviews
Discover what our clients think about our service
“We needed a SuDS strategy for our residential development and Courous delivered everything on time. The report was clear, detailed, and exactly what our planning consultant required. Highly recommended service.”
Sarah Mitchell
“Courous made the whole planning process much easier for us. Their Flood Risk Assessment was completed quickly and accepted by the council without any issues. The team was professional, helpful, and easy to deal with throughout the project.”
James Walker
★★★★★
★★★★★
“Excellent drainage design service from start to finish. Communication was great, the turnaround was fast, and the team explained everything in simple terms. We will definitely use Courous again for future projects.”
★★★★★
David Turner
Frequently asked questions
What is a Flood Risk Assessment?
A Flood Risk Assessment is a report that explains the possible flood risks linked to a site or development. It is often required for planning applications in flood risk areas and helps councils understand how flooding will be managed.
Do you provide drainage designs for planning applications?
Yes. We provide drainage designs and drainage strategies for residential and commercial developments. Our designs help support planning approval and comply with local authority requirements.
When do I need a Flood Risk Assessment?
You may need a Flood Risk Assessment if your property or development is located in a flood zone, near a watercourse, or affected by surface water flooding. Local councils may also request one as part of the planning process.
How long does it take to receive a report?
The timeframe depends on the size and complexity of the project. Most reports and drainage designs can usually be completed within a few working days after receiving the required site information.ul.
What are SuDS?
SuDS stands for Sustainable Drainage Systems. These systems are designed to manage rainwater safely and reduce the risk of flooding by controlling how surface water drains from a site.
What is Drainage Strategy ?
A Drainage Strategy is a technical report that explains how surface water and foul water will be managed on a development site. It demonstrates how drainage systems, SuDS features, and water management measures will reduce flood risk, control runoff, and comply with planning and drainage requirements.
It is often required to support planning applications and helps local authorities understand how water will be safely managed both during and after development.
Get In Touch
Courous, Suite 7a, The Globe Centre, Accrington, BB5 0RE
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