When this service may be useful
A surface-water drainage strategy explains how runoff from a proposal will be managed. Early consideration is useful where space, levels, ground conditions or discharge arrangements could influence the site layout.
Water & ground
SuDS Reports & Surface Water Drainage Strategies
A drainage strategy explaining how surface water can be managed within the proposal.
How the work is approached
We review the supplied layout, levels and available drainage information, then develop the agreed planning-stage approach. The strategy explains proposed measures, design assumptions and the evidence needed to confirm feasibility. Infiltration testing, detailed calculations and connection investigations are scoped where relevant.
What you receive
You receive the agreed drainage strategy and supporting information, including maintenance considerations where applicable. Planning-stage proposals may require further investigation and detailed design before construction.
What we need to start
Site layout, levels, drainage records and available ground information.
We review the site, proposal and planning stage to agree the appropriate scope. Specialist surveys and assessments are coordinated where needed.
How our planning consultancy process worksILLUSTRATIVE REPORT PREVIEW
Surface-water Drainage & SuDS Strategy
Front cover and contents page examples. The document structure is tailored to your instruction, site and relevant planning requirements.
What the report should contain
This outline explains the purpose of each section. The final contents depend on the agreed scope, available evidence and requirements of the local planning authority.
Document control & executive summary
Project details, reference, revision, date, author, reviewer and a concise summary of the key findings.
Site & existing drainage
Describe topography, ground conditions, catchments and existing outfalls.
Evidence & design criteria
Record rainfall, climate allowances, rates and local requirements used.
Drainage hierarchy & options
Assess infiltration, watercourses and sewer options with supporting justification.
Runoff & storage calculations
State existing and proposed runoff, attenuation and design assumptions.
SuDS layout & treatment
Set out proposed features, water-quality treatment and amenity benefits.
Exceedance & flood interaction
Identify overland flow routes and interaction with site flood risk.
Ownership, access & maintenance
Define maintenance activities, responsible parties and access arrangements.
Implementation & approvals
Identify phasing, testing, connections and approvals still needed.
Appendices & evidence register
Index relevant plans, photographs, calculations, surveys and source documents; include only the evidence relevant to this instruction.
Read our planning supporting documents guide to explore related evidence.
CASE STUDIES
Where we have prepared this report
Approved
End-of-terrace house converted to a three-bedroom HMO
Chapter Road, Cricklewood · London Borough of Brent
Approved
Basement and side extension to a corner house in a conservation area
Lynton Road, Kilburn · London Borough of Brent
Approved
Roof terrace, rear roof extension, solar panels and basement enlargement in the Brook Green Conservation Area
Wolverton Gardens, Brook Green · London Borough of Hammersmith and Fulham
YOUR QUESTIONS ANSWERED
Surface-water drainage & SuDS FAQs
Clear answers to help you plan your next step.
Still have a question?
Tell us about the site and we will confirm what is needed and what it should cost.
Make an enquiryIs a planning drainage strategy ready for construction?
A planning-stage strategy explains the proposed approach and its assumptions. Further testing, investigations, detailed calculations and engineering design may be needed before construction, depending on the agreed deliverables.
What information should I provide to get started?
Site layout, levels, drainage records and available ground information.
How is the fee for this service confirmed?
The price shown is a starting estimate for the stated scope. We review the site, proposal, available information and required deliverables, then confirm the fee, exclusions and programme in a written quotation before appointment.
How do your specialists work together on a project?
We bring the relevant planning consultants and specialist providers into a coordinated project team. They work from an agreed brief and current proposal, with dependencies and design changes discussed across disciplines. Each consultant remains responsible for their own professional advice and agreed deliverables.
PART OF A COORDINATED APPOINTMENT
Your specialist evidence, connected.
This service can form part of a wider coordinated planning appointment. We bring the relevant consultants together to work alongside your design team, discuss assessment findings and identify how recommendations affect other reports and the proposal.
Your fee proposal confirms who prepares each document, the information it relies on and the limits of the instruction. A report provides evidence for the council’s assessment; the planning decision remains the council’s. Explore how our consultants work together or discuss the team your project needs.
YOUR NEXT STEP
Discuss your requirements.
Tell us about the site, what you want to achieve and any deadline. We will review it and suggest an appropriate next step.
Call 020 8004 4464 or email info@greencodeconsultants.com.