Sustainable Urban Drainage Systems & Surface Water Drainage Design

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Sustainable Urban Drainage Systems & Surface Water Drainage Design

Sustainable urban drainage systems (SuDS), as the name suggests, are sustainable methods of controlling, treating and conveying surface water, which replicate natural processes by slowing flows and disposing of water as close to the source as possible.


In addition, they can provide the added benefits of creating habitats and amenities through the introduction of green infrastructure.


You can find out more about SuDS and what to know for SuDS assessments, but providing the most feasible and cost-effective solutions is critical to getting your project underway efficiently.


Whether for small residential sites requiring percolation tests and soakaway design, or larger sites where a management train approach may be needed, a transparent SuDS report and comprehensive SuDS design are essential.



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Are SuDS Compulsory?

The use of SuDS are now a requirement across the UK, and the majority of local plans and strategies include a requirement for SuDS.  Therefore it is unlikely that planning approval will be granted, or in some circumstances the discharge of conditions relating to surface water will not be agreed, until the proposals include an appropriate SuDS scheme.

We have a proven track record in providing calculations and detail design drawings; working with clients and liaising with relevant authorities to ensure the most appropriate solutions are employed. Our SuDS reports can include as much, or as little of the following as is required by the relevant local authority:


What's Included in a Sustainable Drainage Assessment?

Flood Risk Assessment, assessing the flood risk from all sources, and providing mitigation measures where necessary (this is required to accompany the planning applications for all major developments within a flood zone 1)

  • Pre and post development surface water run off calculations
  • Pre / Post development contributing area and exceedance route plans
  • Percolation tests to BRE365
  • BRE365 Soakaway Sizing Calculations
  • Surface water attenuation calculations
  • Discussion of SuDS hierarchy in line with the local and national policies
  • Proposed SuDS strategy in line with local and national policies
  • Outline SuDS design Layout plans
  • Detailed SuDS Design plans, for construction
  • Management and maintenance plans for the SuDS for the lifetime of the development


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Nimbus SuDS Services

Our experts also have extensive experience in designing:

  • Soakaways;
  • Attenuation devices;
  • Permeable paving;
  • Swales;
  • Filter strips;
  • Wetlands and ponds;
  • Rainwater harvesting systems;
  • Green roofs;
  • Infiltration basins;
  • Infiltration trenches;
  • Detention basins
  • Filter Drains
  • Bioretention

If you would like more information on the services that we provide or would like to obtain a quote, then please do not hesitate to contact us at


Get in Touch to Discuss Your Project

0800 0614916  |

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“I have really enjoyed working with Nimbus. Sadia is extremely knowledgeable and is always willing to go out to her way to help clients. The speed at which Nimbus produce their work is impressive and the prices are extremely competitive. Special mention to Ryan Herity after we worked closely together on a couple of schemes. Always happy to pick up the phone and answer questions. He provided solutions that led to drainage officer approvals – you can’t ask any more than that!”
John Neville
Elegant Homes
“I have used Nimbus Engineering Consultants for several years now. The service is second to none. Sadia effectively communicates throughout the entire process. Nimbus has never let me down. I would wholeheartedly recommend Nimbus for any and all SuDS advice. Nimbus shoot from the hip, and make my life easy, knowing if I have engaged them, I do not have to ever worry.”
Design Doctor
“We’ve collaborated with Sadia on a few projects; Nimbus Engineering’s proposals were well-informed, attentive of regulatory trends and wrapped in proactive attitude.”
Yasmina Mikhael
RES Design Long & Partners
We have been working with Nimbus Engineering for some time in a collaborative approach, allowing us to provide our clients with a complete Engineering service. Primarily providing us with SuDs, foul and surface water design, along with highways design and detailing, Nimbus have given us a great service, both prompt and efficient.
Daniel Fordham
Fordham Consulting
We at Rouf Homes have been using Nimbus Engineering for a number of years, for all matters relating to Drainage design, Flood risk and Sustainable Urban Drainage Systems design. We find them to be very knowledgeable on these matters, approachable, efficient and very cost effective
Belal Rouf
Rouf Homes
Richardson and Peat Ltd are pleased to be associated with Nimbus Engineering for their work on our Surrey school projects for new autistic teaching centres, with exemplary forward-thinking on the issues facing us with surface water attenuation they have not only dealt with the problems cost-effectively but by detailed design of rainwater gardens and swales have also enhanced the projects. Our company look forward to a continuing working relationship with Nimbus Engineering in the future.
Martin Peat
Richardson Peat


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