Helping building owners and
occupiers improve how their
buildings perform

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About us

Since starting out in 2003 as the service division of Diffusion Group, a UK leading HVAC manufacturer, we have grown to become a nationwide provider of technical maintenance solutions and compliance services.

Our purpose is to help our clients maintain their buildings, improve their working environments and reduce their running costs.

To achieve this we have developed a huge depth of technical expertise within the M&E sector; having built a forward thinking, highly skilled team specialising in building performance evaluation and low carbon technologies.

For more information about us or to discuss any specific requirements you have, call us on 0333 207 4245 or email us at info@evotech.co.uk.

Our history

Oct 2020

Compelled by the worsening levels of air pollution in the UK, we launched Evotech Air Quality in October 2020 to help our customers create safer working environments by transforming their indoor air quality.

Mar 2020

Launched in March 2020 our dedicated fire & security division helps our clients keep their people, buildings and possessions safe from the risks of fire and intrudes through the provision of bespoke fire & security protection systems and remote monitoring solutions.

Apr 2017

Following the MBO of Stroma Group, backed by LDC Corporate Finance, Stroma Evolution rebranded to Evotech to create an independent UK-wide provider of building maintenance services.

May 2011

Stroma Group, a UK market leader in the field of building sustainability, energy performance and compliance, acquired SIAS FM to enter the UK building services market under the Stroma Evolution brand.

Sept 2009

Diffusion Group acquired the service division of SIAS Building Services to create a national provider of HVAC maintenance under the SIAS FM brand.

Apr 2003

Diffusion FM was established as the service division of Diffusion Group, a leading UK based manufacturer of heating, ventilation and air conditioning products.

Our values

Our vision

To achieve sustainable growth by being a service provider of choice and developing long-term working relationships with our valued clients.

Our values

  1. We put our customers first.
    We believe in knowing our customers, enriching their experience and keeping them at the heart of everything we do. We recognise that their success is our success.
  2. We challenge conventional thinking.
    We pride ourselves on being at the forefront of technological advancement and discovering ingenious new ways to solve our customers’ problems so they can achieve competitive advantage.
  3. We commit to delivery excellence.
    We support the success of our customers and recognise that our reputation relies on service delivery excellence. We’re dedicated to delivering on our promise, getting it right first time.


Our mission

To help building owners and occupiers maintain their buildings, improve their working environments and attain compliance with all legislation through the provision of quality, reliable and innovative services.

  1. We have a passion for what we do.
    We embrace an entrepreneurial spirit and believe anything is possible. We challenge the norm, move forward with agility and act with honesty, integrity and accountability.
  2. We are human.
    We recognise the urgent challenge of global warming and strive to maximise our social impact whilst minimising our environmental footprint.

Management team


Are you interested in becoming one of our approved suppliers?

We work with a wide variety of supply chain partners throughout the country, who supply us with parts and materials or help us to deliver specialist technical services.

To become an approved supplier you must satisfactorily complete our supplier approval process which ensures you meet our required standards. To apply, send an introductory email to procurement@evotech.co.uk and we’ll send you our approved supplier application forms.

For a copy of our standard purchasing terms please click here


Are you looking to join a forward-thinking business where you will be rewarded for your hard work and commitment, and supported with ongoing training and career development opportunities?

We are continually looking for good people to join us in technical, sales and administration roles.

Just send your CV to jobs@evotech.co.uk.

Or check out our current job vacancies on Indeed and Total Jobs.

Evotech is an equal opportunities employer

Our Locations

Northern Office

Unit B3 Lowfields Close, Lowfields Business Park, Elland, HX5 9DX. Telephone: 01422 377 541

Southern Office

Worting House, Church Lane, Worting, Basingstoke, RG23 8PY. Telephone: 01256 869 880

London Office

4th Floor, 3 Shortlands, Hammersmith, London, W6 8DA. Telephone: 0333 207 4245

Our accreditations, certifications & professional memberships

Have any questions, queries or feedback?

We'd love to hear from you

Contact us