When this service may be useful
Drainage hierarchies in national and London policy put infiltration first. Councils and lead local flood authorities often require tested infiltration rates before accepting a soakaway-based design.
Water & ground
Infiltration Testing Reports
On-site soakage testing to establish whether surface water can be discharged to the ground.
How the work is approached
Trial pits are excavated at the proposed locations and tested in accordance with recognised guidance, with the ground conditions recorded.
What you receive
You receive a report of the measured rates and their implications for the drainage design. Where infiltration is not viable, the report explains the next option in the hierarchy.
What we need to start
Site plan, proposed drainage location and access for testing.
We review the site, proposal and planning stage to agree the appropriate scope. The work is carried out by a suitably qualified specialist we appoint, named in your fee proposal.
How our planning consultancy process worksILLUSTRATIVE REPORT PREVIEW
Infiltration Testing Report
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.
Purpose & proposed drainage
Why testing is needed and the proposed system.
Test locations & method
Trial pits and the test procedure followed.
Ground conditions
Strata observed in the test pits.
Results
Measured infiltration rates.
Suitability for infiltration
Whether infiltration is viable and any constraints.
Recommendations
Design implications and alternatives.
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.
YOUR QUESTIONS ANSWERED
Infiltration testing reports 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 enquiryCan testing be done in winter?
Yes. Testing can be carried out year-round, though high groundwater can affect results; the report records the conditions at the time.
What information should I provide to get started?
Site plan, proposed drainage location and access for testing.
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.