Drainage Design Consultants

OUR SERVICESSustainable Drainage Strategy

Sustainable Urban Drainage System Design for Your Development

With an increasing emphasis on sustainability and environmental consciousness, Surface Water Drainage Strategies (commonly referred to as sustainable urban drainage system design or SuDS) have emerged as a paramount approach for managing surface water run-off in a way that aligns with ecological balance and community well-being. Here at Onn Point, our director and drainage design specialist Robert Smith boasts over 15 years of experience in complex drainage infrastructure design. As a result of his expertise, drainage strategy with Robert and our drainage design consultants is one of our most popular services.

A sustainable drainage strategy encompasses a spectrum of innovative techniques aimed at mitigating the adverse effects of rapid run-off, either by encouraging water infiltration into the ground or by controlled storage. As your go-to drainage design consultants, we offer:

Private Drainage Design
At Onn Point, we have extensive expertise in private drainage design, covering everything from initial planning to construction. Our skilled drainage design specialist team specialises in crafting drainage solutions tailored to each project's unique requirements, seamlessly integrating functionality with sustainability.
Adoptable Drainage Design
We provide adoptable drainage designs that not only meet but surpass regulatory standards. Our meticulous approach ensures the S104 approval, demonstrating our commitment to excellence. From conceptualisation to execution, we oversee the transformation of a sustainable drainage strategy into tangible infrastructure.
Drainage Maintenance Strategies
Our drainage design consultants are dedicated to holistic urban development and offer comprehensive drainage maintenance strategies. We understand the critical link between effective maintenance and the longevity of drainage systems. Our highway drainage design frameworks enhance system efficacy and support seamless planning applications.
Our services include percolation tests that go beyond conventional assessments. We conduct tests for Foul and Surface Water B365, delivering a comprehensive evaluation that provides a deep understanding of water permeability and its implications for sustainable drainage solutions.
For developments exceeding a hectare in flood zone 1 or located in flood zones 2 and 3, Flood Risk Assessments are integral to the planning process. Our expertise guides you through the intricacies of these assessments, ensuring informed decision-making to mitigate potential flood risks.
We excel in the precise science of sizing soakaways and foul field drains. With meticulous attention to detail, our soakaway calculations go beyond numbers, emphasising hydraulic efficiency, ecological equilibrium, and sustainable urban development.

Book your drainage design with our experts.

Our Success Stories

Onn Point’s director Robert Smith has extensive experience in infrastructure design including highway design and drainage design. Driven by Robert’s expertise and dedication to delivering exceptional results, Our drainage design consultants and engineers have worked on a number of notable projects, including:


Robert’s expertise extended to the design of emergency shaft escapes and Muster assembly points, along with all associated infrastructure design.

Gautrain, Gauteng, South Africa

Rob prepared successful tender documents, preliminary drawings, and designed shaft escapes and Muster assembly points. Our work within this project extended to the mechanical and electrical design of services and communications ducting.

Walsall Housing Development

Rob is proud to have overseen the infrastructure design of a housing development on Bentley Road North in Walsall. This included full Section 38 road adoptions and Section 104 sewage adoption, encompassing all aspects of private drainage. Our proactive approach involved regular site visits to ensure the implementation of the most cost-efficient methods.

Smaller Developments

Onn-Point works on a range of project sizes, including smaller developments.

Our pricing for a single-house design begins at £750 + VAT.

How does a Sustainable Drainage Strategy work?

A sustainable drainage strategy (SuDS) design encompasses a comprehensive approach to managing surface water runoff, aiming to mitigate environmental impact, minimise flooding risk, and enhance water quality.

Integrated with urban design, a SuDS report prioritises water quality improvement and incorporate maintenance strategies, ensuring adherence to regulatory standards.

Benefits of a Sustainable Urban Drainage System Design with Onn Point

Flood risk reduction
Crafted by specialised drainage design consultants
Biodiversity enhancement
Complex projects specialists
Improved water quality
Sustainable land use
15+ years’ experience
Ground testing

OUR WORKClient Reviews

We are incredibly proud of our customer feedback please read some of our testimonials below.
Liam Devaney
Liam Devaney
10 May 2024
Rob and the team at Onn-Point have been brilliant throughout the process. Friendly, polite and professional. Great communicators and a pleasure to work with
Mohamed Fahmy
Mohamed Fahmy
13 February 2024
Rob and his team are one of the top professional teams I came across. We hired his company to create drainage strategy, drainage statement and design for our project. I found Rob to be extremely helpful, caring and always goes the extra mile. Despite his busy schedule, he always found the time to help even if it was not particularly his task. He has wealth of knowledge, and experience to deal with the Councils requirements in an increasingly sophisticated environment. I could not recommend Onn Point more for your projects.
Andrew Hesketh
Andrew Hesketh
20 January 2024
Rob carried out a full drainage strategy for a new build. The local authority and utility company approved the strategy without any problems. Excellent service, very happy and would highly recommend.
Russell Preson
Russell Preson
19 January 2024
With over 45 years of experience in the construction industry, utilising various consultants. it’s refreshing and comforting to deal with Onn-Point. Rob and his team have been professional and accommodating throughout. We have most certainly put them on our list of professionals to use in the future.
M Cee
M Cee
20 February 2023
Excellent service and work. Really responsive and reliable.the best!
Jason hull
Jason hull
6 February 2023
many thanks to rob for his help and knowledge , first class service
John Dennis
John Dennis
27 January 2023
Very good & prompt,but most of all you can speak to a human which is fantastic. Highly recommended
Pradeep Goel
Pradeep Goel
16 November 2022
Impressed with the best, honest and timely service offered for new drainage layout for a new dwelling!!
Marcin Kukulski
Marcin Kukulski
10 February 2022
Great and speedy service, thank you Rob.

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