360 Surveys NI Ltd
Based in Portadown, County Armagh · Covers Northern Ireland and Ireland, including Belfast, Armagh, Craigavon, Newry, Lisburn and Banbridge Accreditation not yet checkedOwn website
02 · Building Regulations · Part H
Percolation and soakaway tests in Northern Ireland
29 providers offering percolation and soakaway tests in or across Northern Ireland, including national firms. The rules in Northern Ireland differ from England’s, so see the notes below.
The rules in Northern Ireland
In Northern Ireland, drainage is covered by Technical Booklet N. A septic tank or treatment plant discharging to a waterway or to the ground needs consent from the Northern Ireland Environment Agency under the Water (Northern Ireland) Order 1999, and NIEA asks for percolation test results where discharge to the ground is proposed.
29 drainage and ground testing specialists for Northern Ireland
Featured (paid) listings first, then A–Z · How we check listings
Showing all 29 providers
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Based in or covering Northern Ireland (7)
C J McIvor Groundworks Contractor
Based in Dungannon, County Tyrone · Covers Northern Ireland and the Republic of Ireland Accreditation not yet checkedOwn website
Causeway Geotech
Based in Ballymoney, County Antrim · Covers Northern Ireland and Ireland; offices in Ballymoney, Belfast and Dublin Accreditation stated by provider: UKAS (selected in-situ tests)Own website
DepaWater
Based in Mowhan, County Armagh · Covers Across Northern Ireland Accreditation not yet checkedOwn website
Dynamic Tank Solutions
Based in Dungannon, County Tyrone · Covers Throughout the UK and Ireland Accreditation not yet checkedOwn website
JNP Group
Based in Amersham, Buckinghamshire (offices across the UK) · Covers National coverage; offices in Amersham, Belfast, Brighouse, Bristol, Hartlepool, Sheffield and Warwick Accreditation not yet checkedOwn websiteUK-wide
Lucion Group
Based in Gateshead, Tyne and Wear · Covers Head office Team Valley, Gateshead; offices in Aberdeen, Preston Brook, Manchester, Hull, Leeds, South Yorkshire, Lincoln, Peterborough, Coventry, Surrey, Stroud, Bristol, London and Northern Ireland Accreditation stated by provider: UKAS-accredited inspection body No. 0263 (asbestos), CIEEM-accredited ecologistsOwn website
National providers (check they cover your area) (22)
Abbeydale Geoscience Limited
Based in Wakefield, West Yorkshire · Covers Yorkshire and the wider UK Accreditation not yet checkedOwn websiteUK-wide
Below Ground Solutions Ltd
Based in Taunton, Somerset · Covers UK-wide for percolation tests Accreditation not yet checkedOwn websiteUK-wide
Betts Associates (Betts Hydro)
Based in Sealand, Flintshire, Wales · Covers UK-wide Accreditation stated by provider: Not confirmed on siteOwn websiteUK-wide
Castledine Environmental
Based in Leeds, West Yorkshire · Covers Yorkshire and the Humber; also works nationally Accreditation not yet checkedOwn websiteUK-wide
Create Consulting Engineers
Based in Norwich, Norfolk (also London, Glasgow, Chelmsford, Milton Keynes) · Covers UK-wide (England and Scotland, from five offices) Accreditation verified 12 October 2026Own websiteUK-wide
Earth Environmental & Geotechnical
Based in Stockport, Greater Manchester · Covers UK-wide Accreditation stated by provider: Not statedOwn websiteUK-wide
Earth Science Partnership Ltd
Based in Taff's Well, Cardiff · Covers Wales, England, Scotland, Northern Ireland and Ireland Accreditation stated by provider: ISO 9001, ISO 14001Own websiteUK-wide
G&J Geoenvironmental Consultants Ltd
Based in Barrow-upon-Soar, Leicestershire · Covers Throughout the UK from a Midlands base Accreditation not yet checkedOwn websiteUK-wide
Geocon Site Investigations Ltd
Based in Marple, Stockport · Covers Nationwide; Newcastle office covers North East, North Yorkshire, Humberside and Scotland Accreditation stated by provider: RISQS approvedOwn websiteUK-wide
Geoinvestigate
Based in Newcastle upon Tyne, Tyne and Wear · Covers Newcastle, County Durham, Northumberland and across the UK; head office in North Yorkshire Accreditation not yet checkedOwn websiteUK-wide
GeoSmart Information
Based in Shrewsbury, Shropshire · Covers Not explicitly stated; serves planners, architects and developers nationally Accreditation stated by provider: Not confirmed on siteOwn websiteUK-wide
Geosphere Environmental Ltd
Based in Brightwell, Suffolk · Covers Nationwide; most work in Suffolk, Essex, Norfolk, London, Bedfordshire and Kent Accreditation not yet checkedOwn websiteUK-wide
GRM Development Solutions
Based in Burton-on-Trent, Staffordshire · Covers Across the UK Accreditation not yet checkedOwn websiteUK-wide
Ian Farmer Associates (1998) Ltd
Based in Washington, Tyne and Wear · Covers Throughout the UK from hubs in Glasgow, Washington, Warrington, Coventry and Hemel Hempstead Accreditation stated by provider: UKAS, ISO 9001, ISO 14001, ISO 45001, AGS member, Constructionline Gold, CHAS, RISQSOwn websiteUK-wide
Jomas Associates
Based in Uxbridge, London · Covers Nationwide; names London, Surrey, Kent and Wales Accreditation not yet checkedOwn websiteUK-wide
Micro Geotechnical Ltd
Based in Hevingham, Norfolk · Covers Nationwide Accreditation stated by provider: CHAS, Building Trust, SafeContractorOwn websiteUK-wide
PRP UK Ltd
Based in Enderby, Leicester · Covers Across the UK; offices in Leicester, Northampton and London Accreditation not yet checkedOwn websiteUK-wide
Sevenoaks Environmental Consultancy Ltd
Based in Pembury, Kent · Covers South East including London and the Home Counties; nationwide support Accreditation not yet checkedOwn websiteUK-wide
Solmek
Based in Stockton-on-Tees, County Durham · Covers Across the UK; offices in Stockton, Chesterfield, Glasgow and Reading Accreditation stated by provider: UKAS (ISO/IEC 17025 laboratory), ISO 9001, ISO 14001, ISO 45001, CHASOwn websiteUK-wide
Southwest Environmental Limited
Based in Taunton, Somerset · Covers UK-wide, with offices in Taunton, Exeter, Plymouth, Bristol, London, Manchester and Edinburgh Accreditation not yet checkedOwn websiteUK-wide
Sub Surface Ltd
Based in Preston, Lancashire · Covers Nationwide from offices in Preston, Ossett, Tipton and High Wycombe Accreditation not yet checkedOwn websiteUK-wide
Unda Consulting
Based in Crawley, West Sussex · Covers Nationwide Accreditation stated by provider: CIWEMOwn websiteUK-wide
Percolation and soakaway tests in other regions
London (12) South East (17) East of England (8) South West (12) West Midlands (11) East Midlands (12) Yorkshire and the Humber (10) North West (10) North East (9) Wales (8) Scotland (10)
Percolation and soakaway tests in Northern Ireland
This page lists drainage and ground testing specialists covering the 11 council areas of Northern Ireland, with cities such as Belfast, Derry, Lisburn and Newry. Northern Ireland has its own Building Regulations, and building control is done by the council.
We list 7 firms for percolation and soakaway tests in Northern Ireland. Of these, 5 work only in this region and 2 also cover other regions. Another 22 firms say they cover the whole UK.
Firms that work only here are based in Dungannon (2), Ballymoney (1), Mowhan (1) and Portadown (1).
Of the 7, 2 state an accreditation or membership. We have not verified any of them yet, so these are as each firm states. See how we check listings.
Nearby regions for percolation and soakaway tests: Scotland. Other reports in Northern Ireland: drainage strategy (SuDS), flood risk assessment, contaminated land report, structural engineer’s report and topographical survey.
Getting signed off in Northern Ireland
In Northern Ireland, your district council handles building control. New homes need a full plans application, and the council issues a completion certificate at the end. The technical rules are set out in Technical Booklets rather than Approved Documents.