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Monday – Friday 08:00 – 17:00

Urmson LLP is part of the RJ Urmson Group. Key business activities are the commissioning, surveying, monitoring, and validation of HVAC and water systems. In addition, we offer independent witnessing testing, pressure balancing, and seasonal commissioning.

We offer a level of expertise that benefits a vast range of sectors including healthcare, education, offices, retail, manufacturing, commercial and residential buildings.

Quality Guarantee

Quality is paramount in what we do. Our engineers are certified Authorised Persons (HVAC) for your peace of mind

Why choose us?

Over 30 years of satisfied customers, bespoke service suited to your requirements, national coverage, fully insured and nationally accredited Quality Management System ISO 9001:2015

Our values

We have three core values that inform our behaviour and approach to work: to Excel, Challenge and Inspire

We Are Recruiting! Take A Look At Our Latest Career Opportunities

What services do we offer?

Whatever your commissioning requirements are – commissioning of HVAC systems, surveying of buildings, independent witness testing and seasonal commissioning – contact us on 01257 262 683 to see how we can assist you or click below for further details:

Independent Witness Testing 2

Work & Projects

  • Commissioning of domestic water systems is carried out in order to safeguard water quality and public health. It is a legal requirement under the ...

  • Our independent witness testing service ensures that equipment has been calibrated to the optimum and that the system performance meets the design operational requirement. ...

  • Pre-commissioning of HVAC system checks are an important part of the commissioning process of a building and allow for a smooth transition to the ...


“ADT Energy has taken great pleasure in contracting RJ Urmson Group in a number of applications of varying sizes. RJ Urmson Group have been very accommodating with all of ADT’s requirements and requests. Detailed certification and documentation for works carried out have always been issued promptly. Their engineers have always conducted themselves in a friendly and professional manor and their workmanship is of the highest standard. I would happily recommend RJ Urmson Group to any potential client requiring their services”

James Roxburgh
Project Manager
ADT Energy

“I have had the pleasure of working with Urmson LLP for that past 17 years carrying out a variety of commissioning projects and plant applications. From air flow balancing on commercial VRV projects to CHW mechanical flow rate testing and commissioning, their engineers integrate as part of our team and as a result it helps our business deliver the high standards our clients expect. Credit to their commissioning engineer, John who is consistently punctual, equipped and able to provide specific SSOW and always demonstrates a clear understanding of the works involved. Thank you.”

Jeremy Rolland
HVAC-R Project Manager
Integrated Air Conditioning

“Due to programme constraints, a number of other factors it were always going to be a challenging project, and it’s been a huge achievement to get to where we are at. Kirk and his guys came into a pressurised situation but still managed to put in as much effort as possible and carried out their works to an extremely high standard which was also noticed by the clients’ consultant when the witnessing was carried out without any issues. Arthur McKay & ISG really appreciate the efforts Urmson LLP put in, as it helped push the job across the line”

Martin Kerr
Project Manager
Arthur McKay Building Support Services

Interested? Get in touch for a quote!

RJ Urmson Group Accreditations