Percolation Tests carries out BRE365 soakaway percolation testing and foul infiltration testing across Birmingham, supporting planning applications for extensions, self-builds, and infill developments throughout the city.
Birmingham sits mainly on Mercia Mudstone and sandstone, with drainage performance varying noticeably between the sandier ridges (such as around Sutton Coldfield and the north-east) and the heavier clay found in parts of south and east Birmingham. Urban sites also often carry made ground and historic disturbance from previous development, which can significantly affect infiltration rates — another reason a proper site test matters more in a city environment, not less.
We test across Birmingham city centre, Edgbaston, Moseley, Erdington, Northfield, Sutton Coldfield, and surrounding suburbs. Available Monday to Friday.
Contact us for a free, no-obligation quote for percolation or infiltration testing anywhere in Birmingham. Call 01902 475653 or request a quote online.



Explore some of the percolation and infiltration testing sites we've completed in and around Birmingham.
Loading map...