Jomas Associates
Based in Uxbridge, London · Covers Nationwide; names London, Surrey, Kent and WalesJomas Associates is based in Uxbridge, London, offering percolation and soakaway tests, contaminated land report, flood risk assessment, drainage strategy (SuDS) and tree survey in London, the South East and Wales, 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 |
| Drainage strategy (SuDS) | SuDS | Ask for a quote |
| Tree survey | BS 5837 | Ask for a quote |
Services listed on Signed Off. The provider may offer others.
About
Geo-environmental consultancy in Uxbridge, west London, working nationwide. Carries out BRE 365 soakage tests in trial pits and borehole infiltration tests, alongside Phase 1 desk studies, Phase 2 ground investigations and flood risk assessments with SuDS.
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; names London, Surrey, Kent and Wales
London South East Wales 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.
Drainage strategy (SuDS). A drainage strategy sets out how rainwater and foul water from a new development will be dealt with, usually favouring sustainable drainage systems (SuDS) that slow water down and let it soak away rather than sending it straight to a sewer.
Tree survey. If there are trees on or near your site, most councils will want a tree survey to BS 5837 before they’ll decide a planning application.
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Percolation and soakaway tests in LondonPercolation and soakaway tests in South EastPercolation and soakaway tests in WalesContaminated land report in LondonContaminated land report in South EastContaminated land report in WalesFlood risk assessment in LondonFlood risk assessment in South EastFlood risk assessment in WalesDrainage strategy (SuDS) in LondonDrainage strategy (SuDS) in South EastDrainage strategy (SuDS) in WalesTree survey in LondonTree survey in South EastTree survey in WalesPercolation and soakaway tests across the UKContaminated land report across the UKFlood risk assessment across the UKDrainage strategy (SuDS) across the UKTree survey across the UK