Have your say on SuDS in London: A Design Guide

Closed 25 Sep 2016

Opened 19 Aug 2016

Results updated 9 Jan 2017

In September, we consulted on a guidance document; Sustainable Drainage Systems (SuDS) and received 27 responses containing a total of 368 individual comments.

The guidance, entitled ‘SuDS in London – a guide’, seeks to show how SuDS can be incorporated into London’s streets and wider public realm. It highlights potential opportunities and constraints, aiming to encourage the relevant authorities across London, including the boroughs, to consider their streetscape and the possibilities of successfully integrating SuDS.

Summary of issues raised during consultation

  • Positive comments, supporting the implementation of SuDS throughout London and stating that this guidance would help support its delivery. The case studies were also commented on to be useful and well-illustrated
  • Respondents stated that maintenance needed to be covered in greater detail
  • The document was over 200 pages long and respondents felt that it needed to be shortened and ‘tightened up’ in order to be more usable. Respondents also stated that the guidance document needed to be clarified relative to other guidance on SuDS, street design etc.,

Conclusion and next steps

As a result of this consultation we have made a number of changes to the final guidance, which are detailed in Section 5 of the report.

The guidance is published online via the TfL Streets Toolkit webpage.

The consultation report is available below:



We want your views on our new guidance document which shows how to integrate Sustainable Urban Drainage (SuDS) seamlessly into London’s streetscape and public realm. The proposed guide has been developed for all publicly accessible space in the Capital, including roads and streets managed by Transport for London and the boroughs.


The proposed guide:

  • Outlines the principles of SuDS and how these principles relate to London.
  • Identifies the components that make up a SuDS system
  • Illustrates how these components may be integrated into the public realm
  • Shows how SuDS have been applied in practice.
  • Provides guidance on methodology and cost comparison


It is intended to use the document alongside TfL’s Streets Toolkit guidance and the CIRIA SuDS Manual. The guidance should inform design options throughout London to deliver the many potential benefits of SuDS.

Through this consultation, we welcome your comments on all parts of this proposed guide.

We have developed this draft document in this format for consultation purposes. The final document will adopt a look and feel that is consistent with a TfL style.

You can view the draft SuDS in London guide as a single document, or as individual chapters below:


SuDS in London: Document sections


I. Background

II. Policy justification

III. Surface water and SuDS

IV. What are SuDS?

V. Who is the Guidance for?

VI. How should I use the Guidance?

VII. Structure of guidance


1.0 Vision

1.1 Planning for the future

1.2 How should London’s water resources be managed

1.3 Building in resilience

1.4 What rainfall events do I need to plan for in London?

1.5 How should I approach the implementation of SuDS in London?

1.6 Principles of SuDS design

1.6.1 Water quantity

1.6.2 Water quality

1.6.3 Amenity

1.6.4 Biodiversity

1.7 SuDS Components and the SUDS Management Train


2.0 The London Context

2.1 What is unique about London?

2.2 London’s geological conditions

2.3 London’s chalk aquifer

2.4 London’s soils

2.5 Contamination

2.6 Streetscapes of London

2.7 Townscape

2.8 London’s Green Infrastructure

2.9 Archaeology

2.10 Working with London’s utilities

2.11 Who do I contact?

2.12 Inclusive design

2.13 Crime and disorder

2.14 Bringing it all together


3.0 SuDS Components

3.1 What is appropriate for London?

3.2 Structures

3.3 Infiltration systems

3.4 Filter strips

3.5 Filter drains

3.6 Wet swales and dry swales

3.7 Rills, runnels and channel systems

3.8 Bioretention systems3.9 Trees

3.10 Permeable paving

3.11 Attenuation and storage

3.12 Detention basins

3.13 Ponds and wetlands

3.14 Management and maintenance


 4.0 SuDS on London’s Streets

4.1 Movement and place

4.2 Street scenarios 1- 9


5.0 Case Studies

London under 500m²

5.1 Priory Common 85 m²

5.2 Dale Court 90m²

5.3 Museum of London 100m²

5.4 Upminster Bridge swale 400 m²

5.5 Kenmont Gardens 435m²


London under 2000m²

5.6 Central Hill 640m²

5.7 Derbyshire Street 765m²

5.8 Renfrew Close 900m²

5.9 Islington Town Hall 1000m²

5.10 Rectory Gardens 1000m²

5.11 Hollickwood School 1100 m²

5.12 Talgarth Road 1200m²

5.13 Mile End Green Bridge 2000m²


London over 0.2ha

5.14 Queen Caroline Estate 0.23ha

5.15 Australia Road 0.26ha

5.16 Crown Woods Way 0.26ha

5.17 Hackbridge 0.27ha

5.18 Goldhawk Road 0.27ha

5.19 Firs Farm 0.48ha

5.20 Salmons Brook 0.77ha5.21 Richmond Park 1ha

5.22 Coulsdon Bypass 34ha

5.23 Dagenham SIP 142ha

5.24 LuL depot roof, Middlesex 125m²


National & International

5.25 Clay Farm, Cambridge 109ha

5.26 Alnarp, Sweden 0.37ha

5.27 Benthemplein, Netherlands 0.95ha

5.28 Rue Garibaldi, Lyon, France 15ha

5.29 Bo01, Malmo, Sweden 85ha

5.30 Augustenborg, Sweden 320ha


6.0 Implementation 

               6.1 Implementation

               6.2 SuDS Design Team

               6.3 Overall plan

7.0 Cost Benefit

7.1 Cost Benefit

7.2 Methodology

7.3 Design life

7.4 Cost comparison

7.5 Best value



  • Further information
  • Glossary


Have your say

Please give us your views by completing the online survey below by Sunday 25 September 2016.

Alternatively, you can:


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  • Policy