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Established 2004

Ruddlesden geotechnical

Ruddlesden geotechnical provides ground investigation, geotechnical consultancy and contamination assessment services.

Based in Exeter, but covering the whole of the UK, albeit primarily concentrated in the South West, Ruddlesden geotechnical was formed in 2004.

Ruddlesden geotechnical works on behalf of a wide client base, including local, regional and national housing developers, housing associations, commercial developers, building contractors, structural and civil engineers, architects, building consultants, quantity surveyors, local authorities and private individuals.

Development projects range from single dwellings and extensions to large housing estates, multi-storey flats, offices, industrial units, roads, slopes, schools, hospitals and basements.

The services and projects listed on this web-site provide an indication of those undertaken by Ruddlesden geotechnical, but others are carried out. If your requirement is not readily identifiable on this web-site, please contact us as we may still be able to help you.

  • AGS
  • Constructionline
  • CSCS
  • SMAS
  • ECFC trust

Latest news

Recent projects

  • Latest news

    05 Oct 2026

    Everything you always wanted to know about soakaway testing and groundwater monitoring*

    Everything you always wanted to know about soakaway testing and groundwater monitoring* (*but were afraid to ask).This was the title of a recent lunchtime CPD presentation that Simon and Callum recently gave to a company of drainage and civil engineers. Whilst the pun in the title, taken from a Woody Allen film, might have been lost on many of the audience, its content certainly wasn’t. I am all for sharing what we know, particularly if it takes less than an hour, over lunch, and especially if it helps make all of our lives easier and to the benefit of others. Whilst standing up in front of a room and talking for around 40 minutes isn’t my idea of fun, the benefits are great and many, so we are happy to provide a similar talk to others, if anyone fancies it.    Providing a pizza lunch is optional, but always helps with our availability!

    Everything you always wanted to know about soakaway testing and groundwater monitoring*
    Everything you always wanted to know about soakaway testing and groundwater monitoring*

  • Recent projects

    Earthworks Materials Suitability Assessment Enables Re-Use of Site-Won Soils, Devon

    A materials suitability assessment was undertaken as part of a wider geotechnical investigation and contaminated land assessment for a proposed residential development site in Torbay. Due to the site’s topography, significant amounts of cutting and filling were to be required to make the site suitable for development. Trial pitting was undertaken to ascertain the thickness, composition and type of materials present in the areas of proposed cut. Representative samples were taken for laboratory classification testing. On receipt of the laboratory test results, the materials were classified in accordance with Specification for Highway Works: Series 600: Earthworks, to determine whether the materials were suitable for their proposed end use. Ruddlesden’s report helped the developer assess the relative cost and viability of using site-won material, in lieu of importing large quantities of engineered fill and exporting excavated material to landfill unnecessarily.

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  • Recent projects

    Residential Redevelopment of Former Garage

    A human health risk assessment at a proposed residential development site in North Devon was undertaken as part of a wider scope of works comprising a Phase 1 and Phase 2 contamination assessment, followed by the production of a remediation strategy and subsequent validation testing. The Phase 1 assessment indicated that the site was a former garage, part of a larger historical coach depot. The Phase 2 contamination investigation, which comprised windowless sample boreholes and contamination laboratory testing, recorded elevated levels of total petroleum hydrocarbons (TPH)and lead within both made ground and underlying natural soils, associated with a remnant underground storage tank (UST), fuel lines and an off-site tank, within the confines of the former coachworks. The contamination risk assessment indicated the recorded levels of contamination to potentially be harmful to human health, given the proposed residential land use. To protect end users, Ruddlesden recommended that all of the tanks and associated fuel lines be remove, and that all proposed garden/ soft-landscaped areas be capped with a minimum thickness of 600mm topsoil and subsoil underlain by a geotextile membrane. All of Ruddlesden’s reports were approved by the local authority’s environmental health officer and the contaminated land planning condition was satisfied.

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