South West Geotechnical

What South West Geotechnical does

South West Geotechnical Ltd (SWG) is a UK-based, independent ground investigation company that operates simultaneously as a consultancy, a contracting services provider, and a UKAS accredited laboratory. Founded in the late 1980s and headquartered in Tiverton, Devon, the company is a subsidiary of Phenna Group, a global Testing, Inspection, Certification and Compliance (TICC) business, and operates within Phenna's Infrastructure Division. SWG serves developers, engineers, and contractors across sectors including housing, highways and infrastructure, earthworks, renewable energy, contaminated land, dams and water infrastructure, and rock slope and coastal projects, with a primary geographic focus in the South West of England and broader UK coverage.

The company's technical capability rests on a fleet of in-house drilling and sampling equipment — four window sampling rigs, a Dando Dual Mast Terrier, a Commachio 205 rotary cored boreholes rig, a GeoNor H10 self-boring shear vane, a GA5000 ground gas analyser, a MiniRae PID, and 14 in-situ Rugged Troll groundwater level loggers — combined with a UKAS accredited laboratory performing moisture content, Atterberg limits, sieve analysis, shear box, triaxial, consolidation, CBR, and density testing under ISO/IEC 17025. Analytical work is supported by Rocscience Slide, BRESOAK, Rocscience Dips, Geodasy, and KeyLab software for slope stability and geotechnical design. This vertically integrated model enables the company to deliver complete site investigation packages from initial desk study through to factual reporting without reliance on subcontractors.

SWG generates revenue through professional services fees on a project-by-project, quote-based model. Core service lines include site investigation contracting, geotechnical consultancy (foundation design, slope stability, earthworks design, retaining walls, ground improvement, subsidence assessment), UKAS accredited laboratory testing, contaminated land assessment (Phase 1 to quantitative risk assessment under BS10175), and in-situ testing and earthworks management. Customer acquisition is conducted primarily through direct engagement (phone, email, website contact form), LinkedIn presence, and word-of-mouth and referrals from Local Authorities, warranty providers such as NHBC, and repeat construction industry clients. The company holds ISO9001, SSIP Worksafe Consultant/Contractor, Constructionline CHAS, and CSCS Platinum certifications, and maintains £5M Professional Indemnity and Public Liability insurance.

Name

South West Geotechnical

Legal name

South West Geotechnical Ltd

Website

https://swgeotech.co.uk

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

South West Geotechnical is a UK-based independent ground investigation consultancy, contracting services provider, and UKAS accredited laboratory serving housing developers, infrastructure contractors, and renewable energy clients across the South West of England, operating as part of Phenna Group's Infrastructure Division.

Ownership category

akta.pro rank

Product category

Geotechnical and ground investigation services

NAICS

Geophysical Surveying and Mapping Services (54136), Site Preparation Contractors (23891)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Geotechnical Investigation & Site Characterization (Boreholes, In-situ Testing, Lab Testing) (IMAFAOAG)

akta.pro secondary industries

Geotechnical Design, Engineering & Consulting (Analysis, Design, Peer Review) (IMAFAOAK), Geotechnical & Subsurface Engineering Consulting (BPAHAIAB), Geotechnical Instrumentation & Monitoring (Settlement, Inclinometers, Piezometers) (IMAFAOAH)

Keywords

• Site investigation services
• Geotechnical consulting
• Ground engineering
• Contaminated land assessment
• Soil testing services

Headquarters

HQ city

Tiverton

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Infrastructure, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Site Investigation Contracting: Complete site investigation contracting services including fieldwork, factual reporting, and cross consultancy services with in-house staff and equipment
2. Geotechnical Consultancy: Geotechnical risk management including foundation design, slope stability assessments, earthworks design, and preliminary advice
3. Laboratory Testing Services: UKAS accredited geotechnical laboratory testing services, both independent testing and as part of overall site investigation packages
4. In-situ Testing and Earthworks: In-situ testing including plate bearing tests, CBR tests, density tests, and earthworks design, scheduling, monitoring and validation
5. Contaminated Land Assessment: Phase 1 reports, conceptual site models, quantitative risk assessments, and materials management assessments

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

South West Geotechnical is an independent consultancy, contractor, and UKAS accredited laboratory providing comprehensive ground investigation services. The company delivers site investigation contracting with factual reporting, geotechnical consultancy covering foundation design and slope stability, in-situ and laboratory geotechnical testing, contaminated land assessment, and earthworks design, scheduling, monitoring and validation. All services are delivered with in-house staff and equipment, eliminating reliance on subcontractors.

Product overview

South West Geotechnical is an independent geotechnical consultancy, contractor, and UKAS accredited laboratory providing comprehensive ground investigation services. The company offers a unified service portfolio comprising Site Investigation (covering desk studies through to factual reporting), Geotechnical Consultancy (including foundation design, slope stability, and earthworks), Laboratory Testing (UKAS accredited in-situ and lab geotechnical testing), Contaminated Land assessments, and In-situ Testing/Earthworks services. Additional specialist offerings include Ground Gas Desk Studies, Soakaway Testing, Ground Gas Monitoring, and Coal Workings Investigation. The company operates with in-house staff, drilling rigs, and its own UKAS accredited laboratory, enabling quality-controlled project delivery without reliance on subcontractors. Services span sectors including housing, earthworks, highways, ground mount solar PV, wind, dams, contaminated land, and rock slope assessments.

Differentiator

Problem solved

Functional benefit

Products and services

• Site Investigation Complete site investigation contracting services from desk study through fieldwork and geotechnical laboratory testing to factual reporting, delivered with in-house staff and equipment. For developers, engineers, and contractors requiring ground investigation across housing, earthworks, highways, renewable energy, and brownfield sites.
• Geotechnical Consultancy Geotechnical risk management consultancy covering foundation design, slope stability assessments, adoptable road pavement design, soakaway testing, retaining wall recommendations, ground improvement techniques, earthworks design, piling and crane foundation mat design, and subsidence assessments. For developers, engineers, and contractors managing ground-related project risk.
• Laboratory Testing UKAS accredited in-situ and laboratory geotechnical testing services including natural moisture content, Atterberg limits, sieve analysis, shear box, triaxial, consolidation, compressive strength, CBR, and moisture condition value testing. Available as independent testing or as part of a full site investigation package, with weekly collections from Exeter, Plymouth, Taunton, and Bristol.
• Contaminated Land Assessment Investigation and assessment of geo-environmental and contaminated land issues ranging from Phase 1 reports and conceptual site models to detailed quantitative risk assessments, working within the BS10175 framework. For developers redeveloping former industrial, petrol station, laundry, gas works, and brownfield sites.
• In-situ Testing and Earthworks Earthworks contractor and management services including design, scheduling, monitoring, and validation of earthwork schemes, along with in-situ testing such as plate bearing tests, CBR tests, and density testing. For earthworks contractors managing engineered fill placement across volumes from 500m3 to 1.5Mm3.

Quantifiable outcome

• Planning permission granted following desk studies accepted by Local Authority and warranty providers, saving clients time and money
• +2 more outcomes

Named customers5 records

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Partnerships

One partnership is on record.

• Phenna GroupcoreOthersSouth West Geotechnical is a subsidiary company of Phenna Group, a global Testing, Inspection, Certification and Compliance (TICC) business. SWG operates within the Infrastructure Division of Phenna Group alongside other specialist testing companies.

Scale indicators6 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• SOCOTEC UK: Major UK TICC provider (formerly ESG) with a large ground investigation, geotechnical laboratory and site investigation practice serving construction, infrastructure and environmental clients — competes on national frameworks SWG cannot reach alone.
• Arcadis: Global design and consultancy firm with a UK geotechnical and ground engineering capability serving buildings, mobility and resilience clients — competes on larger, multi-disciplinary project work.
• Fugro: Global geotechnical, survey and geo-data specialist with extensive UK ground investigation activity for offshore wind, infrastructure and large civil projects — competes with SWG for major renewable energy and infrastructure tenders.
• WSP: Global engineering consultancy with a large UK geotechnical and ground engineering practice serving transportation, property and environment — competes for higher-value design-led geotechnical work SWG also delivers.
• Mott MacDonald: Global engineering, management and development consultancy with a UK ground engineering team covering site investigation, geotechnical design and earthworks — a broad incumbent competing for infrastructure frameworks.

Direct peers

• Ian Farmer Associates: UK ground investigation and geotechnical consultancy (now part of RSK) offering site investigation, laboratory testing and geotechnical design for housing, highways and commercial developers — comparable in size, services and customer base.
• Structural Soils: UK ground investigation contractor and laboratory (part of RSK Group) offering boreholes, in-situ testing, geotechnical lab services and geoenvironmental assessments — directly overlapping SWG's core service stack for UK construction clients.
• Concept Engineering Consultants: UK geotechnical and geoenvironmental consultancy providing site investigation, contaminated land assessment and geotechnical design for developers and contractors — comparable in service portfolio and project mix.
• Geotechnical Engineering Ltd: Long-established UK ground investigation and geotechnical services firm with drilling, in-situ testing and laboratory capabilities, focused on construction and infrastructure — direct comparable in scope and customer mix to SWG.
• Earth Environmental & Geotechnical (EEG): UK-based ground investigation, geotechnical engineering and environmental consultancy serving construction and development clients with in-house drilling and laboratory testing — a regional peer with similar integrated offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/south-west-geotechnical-ltd

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about South West Geotechnical