Site Investigation
BS 5930 site investigations: trial pits and boreholes, opening-up works, BRE365 percolation testing, soakaway design and drainage impact assessments - measured, photographed and reported.
Where a drain survey tells you the condition of the pipe, a site investigation tells you the ground and the structure around it. Clever Works digs, measures, photographs and reports what is actually there - foundations exposed and measured, strata logged, construction build-ups recorded - so your engineer, architect or building control officer designs from evidence, not assumption. Every investigation is logged and reported to BS 5930, the Code of Practice for Site Investigations.
Our reports are the product you buy: trial pits sectioned to scale with the foundation exposed and measured, shear vane readings taken in the virgin stratum, and opening-up works recording what the floors, walls and ceilings are actually built from - every location photographed and drawn.
Our site investigation services
Trial Pits & Boreholes
Foundations exposed and measured, hand-auger boreholes, shear vane testing and measured section drawings - to BS 5930.
Read more →Opening-Up Works
Carefully formed openings that record what floors, walls and ceilings are built from - located on plan, photographed and detailed.
Read more →BRE365 Percolation Testing
Hand-dug pits, timed fills and the measured infiltration rate your drainage engineer and building control ask for first.
Read more →Soakaway Design & Installation
Sizing from your measured infiltration rate, SuDS-compliant design, then installation of the crates, membranes and pipework.
Read more →Drainage Impact Assessments
The drainage strategy report planning applications and new developments are asked to submit.
Read more →Build-Over Agreements
The CCTV evidence and drawings water companies require before you build over or near a public sewer.
Read more →We also carry out topographical surveys - site levels, boundaries, features and drainage assets mapped into a survey-grade drawing your architect can design on - and can combine any of the above into a single visit and a single report.
What the report looks like
Every investigation is issued as a written report: scaled section drawings, photographs at every location, logged strata and test readings, and plain-language findings your whole project team can act on.
Tell us what your project needs to know.
Call Clever Works on 01252 214 098 or request a fixed quote - we will scope the investigation to the question you need answered.
Need Expert Assistance?
At CleverWorks, we provide comprehensive drainage solutions with transparent pricing and no hidden fees. Get in touch today for a free, no-obligation quote.
Frequently Asked Questions
What does a site investigation include?
It is scoped to your project: trial pits and boreholes to expose foundations and log the ground, opening-up works to record construction build-ups, BRE365 percolation testing for soakaway design, and drainage surveys where the pipes are part of the question. Everything is measured, photographed and reported to BS 5930.
When do I need a site investigation?
Typically for subsidence investigations, extensions and structural alterations, foundation design, soakaway viability and planning applications - any time an engineer or building control officer needs to know what the ground and structure actually are.
Will engineers and insurers accept your reports?
Yes. Investigations are logged and reported to BS 5930 with scaled drawings, photographs and test readings - the format structural engineers, insurers and building control expect to work from.
Can you combine a site investigation with a drainage survey?
Yes, and it is usually cheaper as one visit. A combined report covers both the ground and the drains, which is common on subsidence and pre-purchase work.