Thomson Reuters names eight Keystone Law partners in its Stand-out Lawyers Guide 2026
Andrea James, Andrew Darwin & Anna McKibbin
Jon Close is a specialist Construction and Engineering lawyer with over 20 years’ experience advising on both contentious and non-contentious matters. His work spans renewable energy, infrastructure and utilities projects, as well as precision manufacturing, agri-tech, secure facilities, commercial and mixed-use developments, and prime residential schemes. He advises employers, contractors, engineers, and design teams across procurement, contract drafting, project delivery, and dispute resolution.
Jon has significant experience in technically complex and innovation-focused projects, particularly those involving R&D environments, advanced engineering, and integrated digital/physical security requirements. He is an ADRg-accredited mediator and a TeCSA solicitor, with extensive experience in adjudication, mediation, arbitration, and litigation.
Jon is a construction and engineering specialist, handling both contentious and non-contentious legal work. His practice focuses on acting on hotel developments, including new builds and renovations.
Experience
Jon has particular expertise in energy-related issues including renewables and green technology, acting for employers and their design teams, as well as contractors and engineers.
Experience
Jon advises clients in the agriculture and rural affairs sector, and their design teams, on construction and engineering projects.
Experience
Jon is a construction and engineering specialist, handling both contentious and non-contentious legal work. His practice focuses on acting for developers and their design teams, as well as contractors and engineers.
Experience
Please note: The experience list above may include examples of work completed prior to joining Keystone Law.
Recognised by The Legal 500 for Construction 2020–2026
Recognised by Chambers UK for Construction 2022–2026
Recognised by The Legal 500 for Agriculture and Estates 2025
Recognised by The Legal 500 for Power (including electricity, nuclear and renewables) 2022–2024
Recognised by Chambers UK as a Leading Individual for Construction: South West 2022
Author of A Comparative Guide to Construction and Engineering Contracts (published by Law Brief Publishing, September 2017)
Co-authored pieces on the benefits in terms of legal risk management associated with offsite modular construction
Member of the Society of Construction Law
“He provides strong commercial advice in an accessible way.”
Chambers UK 2026
“Jon Close is a pleasure to work with. He is professional, diligent, straight to the point, and highly knowledgeable. I would not hesitate in recommending him to any client.”
Chambers UK 2026
“Jon continues to provide invaluable support to us. He is always contactable and a pleasure to work with; I regularly recommend his services to other professionals.”
Chambers 2026
“We have been very pleased with his service.”
Chambers UK 2025
“Jon's approach to litigation is straightforward and effective.”
Chambers UK 2025
“I know he can be trusted to deliver.”
Chambers UK 2025
“Jon's approach to litigation is straightforward and effective. We have been very pleased with his service.”
Chambers UK 2025
“Jon is diligent and meticulous, ensuring matters are dealt with swiftly. Once a strategy is in place he is great at keeping us apprised at all times. I know he can be trusted to deliver.”
Chambers UK 2025
“Jon is great at communicating updates to our business and at keeping the legal processes flowing without hindrance.”
Chambers UK 2025
“I've always found Jon to provide straightforward practical advice, even when dealing with complex matters, considering equally the commercial realities and legal aspects of a situation.”
Chambers UK 2025
“One of Jon's strong points, amongst many others, is his commerciality. Having a construction lawyer acting for us who is very commercially aware and industry savvy really adds weight to the advice being provided.”
The Legal 500 2025
“Jon Close is especially diligent and meticulous, ensuring matters are dealt with swiftly. Once a strategy is in place he is great at keeping me, the client, apprised at all times. I know he can be trusted to deliver against any methodology that has been agreed and any strategy developments that evolve I am always kept informed through regular communications.”
The Legal 500 2025
“Jon Close continues to be my go-to person, he has an excellent manner and is very pragmatic in is approach to matters. We have always had great results when using Jon for our commercial and litigation cases.”
The Legal 500 2025
“Jon Close is particularly knowledgeable in his field and I have always been very extremely satisfied with the quality of his advice and work.”
The Legal 500 2025
“One of Jon Close's major strengths is his commerciality. Having a construction lawyer who is very commercially aware and who is knowledgeable in the technical aspects of the industry really adds weight to the advice being provided.”
Chambers UK 2024
“We have worked with Jon Close for years due to the high standard of advice that he has always given.”
The Legal 500 2024
“Jon Close is responsive and very practical in his advice, and always finds a solution.”
The Legal 500 2024
“Jon Close has always been highly professional and provides our company with excellent advice in a timely manner.”
Chambers UK 2023
“Having a commercially aware construction lawyer like Jon acting for us really adds weight to the advice being provided.”
Chambers UK 2023
“Jon is proactive, commercial and dogged in his pursuit of a deal for his clients. He is also adept at advising on novel developments on deals and is a good lawyer to have by your side.”
Chambers UK 2022
“We have engaged Jon Close on a number of occasions over several years and have also recommended Jon to our own clients. Over the years we have engaged Jon to assist us on a number of complex adjudications and on each occasion Jon has provided advice which has resulted in a positive outcome for both us and our clients. Jon is an erudite individual with an encyclopedic knowledge of construction law.”
The Legal 500 2022
“Jon Close in particular is a fantastic networker and is blessed with a contact directory that always enhances the client experience. Added to which the Keystone model enables partner-led advice at a more reasonable fee amount and the Keystone model also ensures that genuine sector specialists are engaged where there is merit in doing so. A genuinely collaborative practice.”
The Legal 500 2022
“Jon Close and Tom Phillips are fantastic committed passionate construction professionals and they absolutely take the time to understand the client’s business and what they can do to help and address any issues.”
The Legal 500 2022
“Jon Close is a key contact.”
Chambers UK 2014
“Jon Close has advised a number of international clients, including Horiba and Biogest Energie und Wasstertechnik GmbH, on a wide range of matters.”
The Legal 500 UK 2014
“Jon Close is recommended.”
The Legal 500 UK 2012
Jon qualified as a solicitor in 2005. Prior to joining Keystone Law in 2016, he worked at the following firms: