Better service through better understanding

Jonathan Ketteridge Associates Ltd is an established commercial project and cost management consultancy based in Leeds currently servicing projects throughout the UK and globally.

From humble beginnings in 2005, JKA has since provided project management services on some of the most prestigious schemes in the region and claims management services on some of the highest-profile building projects internationally.

As a valued member of the team, JKA has been retained by its employer’s agency, dispute resolution and quantity surveying clients who appreciate the benefits of employing experienced, dual-qualified consultants.

“God is not on the side of the big battalions, but on the side of the best shots.” 

When Voltaire wrote those words in 1735 he probably didn’t have had a 17-year-old quantity surveyor sat at his desk in Leeds city centre in 1986 in mind. However, those words were very much uppermost in the thoughts of one young surveyor as he designed his career and planned his professional education.

From an early age, I recognised that further qualifications in project management and construction law would enable me to serve my clients better not only in those related disciplines but also in core quantity surveying practice.

My further training in construction law, project management and expert witness evidence advises an expert level understanding of quantity surveying practice and employer’s agency, as well as providing me with the skills to successfully deliver project management, adjudication advocacy, employer’s agency and expert witness services.

35 years later this practice, founded on those principles continues to go from strength to strength.


Jonathan Ketteridge
CertQS PGCertProjMan PGCertAdj DipSurv DipArb APAEWE FCIArb MRICS 

The Team

Jonathan Ketteridge

Jonathan is a chartered quantity surveyor with post graduate qualifications in project management and construction dispute resolution with over 30 years experience acting as employer’s agent on construction contracts.

A fellow of the chartered institute of arbitrators, Jonathan has advised on international disputes with values in excess of £200m in recent years and has managed projects with contract sums of £30m.

Jonathan holds a masters level advanced professional award in expert witness evidence and has provided expert witness evidence in adjudication and litigation proceedings.

Elisha Leake


A new addition to the team, Elisha is an Architecture (International) graduate with experience delivering administrative assistance and creative works.

Feedback & Testimonials

  • Rachel Dainty

    Expert Witness Litigation, Residential Development, Oxenhope

    “Jonathan’s expert testimony was preferred by the judge in my case and assisted the court in achieving a fair outcome to the trial in relation to my dispute”.

  • Stuart Mcaree


    Expert Witness Adjudication and Expert Assistance Disputed Lidl Account, Lidl Development, Ripley

    “Jonathan’s expert testimony was preferred by the adjudicator in our case and assisted us in achieving a fair outcome to the tribunal relating to our construction dispute. Jon’s expert advice enabled us to make a privileged offer a sufficient sum to avoid the costs of  the tribunal, when diplomacy failed”.

  • Ken Philip

    Beam Consulting

    Lay Advocate/ Construction Adjudication Disputed professional fees (numerous appointments)

    “Jonathan’s advocacy services ensured that we recovered the fees outstanding to us. If you are involved in a construction dispute, you will want Jonathan by your side”.

  • Helen Macrow

    South Street Capital

    Employer’s Agency and Quantity Surveying, Industrial Development, Long Bennington

    “Jonathan’s experience helped us manage a smooth outcome to a development based around a complex agreement for lease, through carefully drafted employer’s requirements  and a final account negotiated between the contractor and tenant”.

  • Paul Mitchell


    "Our retail development at Long Eaton required a “back to back” provision between an agreement for lease with Sainsury’s within the building contract. Jonathan’s considerable experience acting as Employer’s Agent enabled us to achieve just that, delivering the project on time and to budget."

  • Michael Schorah

    St John’s Investments

    "The insolvency of the Contractor on a multi-unit residential development in Wakefield left us in a state of flux both in relation to the appointment of a fresh contractor to complete the project and the negotiations with the receiver for the insolvent contractor.

    Jonathan’s experience of the practicalities of insolvency was invaluable in handling the negotiation with receiver and achieving an outcome under both contracts which left our business in a good commercial position."

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