Sub Surface Ltd
Based in Preston, Lancashire · Covers Nationwide from offices in Preston, Ossett, Tipton and High WycombeSub Surface Ltd is a limited company based in Preston, Lancashire, offering percolation and soakaway tests, contaminated land report and flood risk assessment in the North West, Yorkshire and the Humber, the West Midlands and 4 other regions, and across the UK.
Services
| Service | Regulation | Price |
|---|---|---|
| Percolation and soakaway tests | Part H | Ask for a quote |
| Contaminated land report | Phase 1 | Ask for a quote |
| Flood risk assessment | Planning | Ask for a quote |
Services listed on Signed Off. The provider may offer others.
About
Site investigation company with regional offices in Preston, Ossett, Tipton and High Wycombe. It carries out percolation and soakaway tests, ground investigation, contaminated land assessments and flood risk assessments across the UK.
Details taken from the provider’s own website on 17 October 2026.
What we’ve checked, and what we haven’t
Areas covered
Covers Nationwide from offices in Preston, Ossett, Tipton and High Wycombe
North West Yorkshire and the Humber West Midlands North East East Midlands South East London UK-wide
About these reports
Percolation and soakaway tests. A percolation test measures how quickly water drains away into the ground on your site.
Contaminated land report. A contaminated land report, usually called a Phase 1 desk study or preliminary risk assessment, checks whether past uses of a site could have left pollution in the ground that might harm future residents.
Flood risk assessment. If your site is in or near a flood zone, or is a larger development anywhere, your council will usually ask for a flood risk assessment before granting planning permission, alongside a drainage strategy showing how surface water will be managed.
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