Nationwide BRE 365 Infiltration Test for Drainage and SuDS Approval
A BRE 365 infiltration test is required where sustainable drainage systems rely on ground infiltration. Planning authorities often request this test to confirm soil permeability and soakaway feasibility. For this reason, accurate and compliant testing is essential before finalising drainage design.
At Evolution Safety Solutions, we carry out structured infiltration testing nationwide. Our reports are suitable for planning submission, drainage consultants, and building control.
What Is a BRE 365 Infiltration Test?
A BRE 365 infiltration test measures how quickly water drains into the ground. The methodology follows BRE Digest 365: Soakaway Design and supports the design of soakaways and infiltration-based drainage systems.
The test determines:
Soil infiltration rate
Ground permeability
Suitability for soakaways
Feasibility of infiltration-based SuDS systems
Because drainage performance depends on reliable ground data, testing must be conducted correctly and documented clearly.
When Is Infiltration Testing Required?
Local authorities commonly require infiltration testing where:
New residential developments are proposed
Commercial developments require surface water strategy approval
Extensions increase impermeable areas
Sustainable Drainage Systems (SuDS) are planned
Planning conditions require permeability verification
In most cases, drainage designers cannot finalise soakaway calculations without verified infiltration rates.
For official guidance, refer to UK Government SuDS planning advice:
https://www.gov.uk/guidance/flood-risk-and-coastal-change
How We Conduct the Test
We follow BRE Digest 365 methodology carefully.
Firstly, we excavate a trial pit to the required depth.
Next, we pre-soak the pit to simulate saturated ground conditions.
Then, we fill the pit and measure the rate at which the water level falls.
Finally, we calculate infiltration rates and prepare a structured report.
Because precision matters, we ensure accurate timing, correct pit dimensions, and full documentation.
What You Receive
Following completion of the test, you receive:
Confirmed infiltration rate (Vp value)
Site location details
Pit dimensions and methodology
Photographic evidence
Calculations and results
A clear written report suitable for planning submission
As a result, drainage consultants can proceed with soakaway design confidently.
Why Choose Evolution Safety Solutions?
Nationwide Coverage
We operate across the UK. Consequently, developers, contractors, and homeowners can rely on consistent professional delivery.
Compliant Methodology
We follow BRE 365 testing standards carefully. As a result, reports meet planning authority expectations.
Clear and Practical Reporting
Our reports are easy to understand and straightforward to submit. In addition, we provide photographic evidence and transparent calculations.
Independent and Objective Service
We are not linked to drainage installation contractors. Therefore, our results remain independent and reliable.
Frequently Asked Questions
How long does testing take?
Testing typically takes several hours. However, duration depends on soil conditions and infiltration rate.
When will I receive the report?
We issue reports promptly following testing and calculation verification.
Do you operate nationwide?
Yes. We provide infiltration testing across the UK.
Speak to a BRE 365 Infiltration Test Specialist
If you require a compliant BRE 365 infiltration test to support drainage design or planning approval, we can assist quickly and professionally.
Call: 03333 399 037
Email: info@evolutionsafetysolutions.co.uk