Who We Are

 We are a building services design practice with over 30 years’ experience designing in custodial, commercial, residential, retail and healthcare sectors.
The company was formed by Colin Harding who remains Senior Electrical Partner in the organisation. He is supported by Colin Hoare as Senior Mechanical Partner and they are surrounded by a close-knit Senior Team and team of engineers. People are a large part of what makes a brand successful and we’re proud to have a committed set of individuals.
Over this time we have built a wealth of knowledge in the design of mechanical, electrical and building services solutions for these sectors. Working in the built environment, from commercial office fitouts, upgraded services in prisons, to high-end designer retail stores, CJ Design has completed a portfolio of outstanding design and fitout projects.
With passion and hard work we have built our reputation for designing and managing implementations to the highest professional standards, with outstanding service. The company is recognised by both customers and key partners for it’s technical ability and professional service delivery. We enjoy great customer retention.
Our values reflect those of integrity, trust, quality of design and service delivery. And, importantly, a deep understanding of our Clients’ needs.  This has allowed us to not only gain a better understanding of what drives their needs but also helps to broaden an understanding of the advice we can offer at a much earlier stage in the design process. We have therefore within CJ Design endeavoured to encourage an attitude within all staff to ask the Client “how can I get to know your business and its functional needs better?”
We are actively committed to reducing the carbon footprint of the UK building stock and work hard to deliver sustainable solutions far beyond the guidelines, whilst still working within the cost plan.

Our Key Strengths


culture of success, teamwork and commitment to understanding and delivering a project to meet our client’s needs.


engineering designs stand out for their technical excellence. All our engineers have a strong understanding of multiple design disciplines and believe in the importance of working closely with all teams on a project. This allows everyone to fully understand each other’s requirements and ensure an optimal
design outcome.


senior engineers have worked on large scale projects and have witnessed first-hand how quickly project scopes and costs can increase because of unforeseen complexities, unexpected challenges or lack of experience. We never embark on a design without a detailed understanding of the anticipated architecture, the project requirements and client objectives. That’s why we have a track record of on-time, on-budget delivery of projects.


 experience in the Built Environment for major office developments.


 quality resource with a proven track record of working together as a team.



understand the requirements between the needs of the ‘Developer’ and ‘End user’.



 are dynamic but practical engineers who understand the balance between ‘cost’ and ‘innovation’,ensuring that our designs provide good value for our client’s money.



are keen to forge a long term working relationship with our clients and other designers.



always provide our clients with an integrated and holistic design solution that yields optimal technical and economical results. Our building services designs are not completed in isolation. We believe in the importance of close collaboration with all disciplines involved in the projects we take on.



take pride in the quality of our designs and believe that we provide excellent value for money to our clients. In very competitive and challenging times, we believe that our engineering expertise and customer
service truly provide superior value to our clients as we always go the extra mile.

Our Team

Ben Eades

Ben joined CJ Design in October 2019 with a 1st Class Integrated Masters Degree in Electrical & Electronic Engineering, as a Junior Project Engineer and is currently working in the Electrical department, with aspirations to become well versed in all aspects of engineering, including Mechanical design.

Nick Tippett

Nick re-joined CJ Design in August 2019 as Associate to head up the residential sector. He previously worked at the company in 2016 and left to set up his own consultancy.

Colin Harding

Colin formed CJ Design in 1990 and has been the driving force behind its continued growth. As Managing Director he has focused on developing a people driven design engineering company – they are its best asset.

Samantha Rumney

Samantha joined CJ Design in January 2015. She supports all staff through the life cycle of our projects and takes charge of organising training through our CPDs. Sam also assists in the running of the office.

Kerry Francis

Kerry joined CJ Design in January 2002 and became Company Secretary in 2005.
She has worked within the building services industry for the past 20 years and has over 30 years experience in office management.

Eddie Howes

Eddie joined CJ Design in September 2017 as an MEP CAD Technician. He works on designs for clients like Ted Baker, Urban Revivo and Ministry of Justice.

Jo Harding

Jo joined CJ Design in July 2013 as Business Development Manager.
Jo works across all sectors for CJ Design including retail, commercial and residential.

David Moir

David joined CJ Design in March 2014 as a Senior Electrical Engineer and specialises in working on projects in the retail, commercial and residential sectors.

Kathala Saddler

Kathala joined CJ Design in 2014 as a Project Engineer and has worked across a variety of project types, both new build and refurbishment.
She is a registered Low Carbon Consultant.

Nash Kovachev

Nash joined CJ Design in November 2017 as an Electrical Design Engineer. He has previously worked on the electrical design for Dorsett City Hotel in London and has experience in a number of residential developments.

Richard Leitch

Richard joined CJ Design in January 2020 as a Mechanical Project Engineer, previously working predominantly in the residential sector.

Paul O’Neill

Paul joined CJ Design in April 2008 as a Senior Engineer to the mechanical team. Over the last couple of years he has focused on developing within the Practice a system of providing a specialist service in residential schemes.

Colin Hoare

Colin joined CJ Design in January 2000 as Mechanical Director.
He maintains a key interest in all projects within the Practice whether directly or indirectly involved.

Our Clients

Awards & Certification

The Jimmy Choo Store New Bond Street

The Jimmy Choo Store New Bond St was awarded the prestigious silver LEED
certification in June 2015, under the LEED for Retail Interiors rating system. This
identifies the project as a showcase example of sustainable design and demonstrates leadership in transforming the building industry.
CJ Design were proud to have played a major part in achieving this award especially in view of the challenges presented by working on a listed building, and managing to achieve such a high sustainable standard.

British Council for Offices Award 2002

The fit-out of Altius House in Milton Keynes consisted of the formation of a new open plan office space accommodating around 200, conference and meeting facilities, training rooms and staff coffee bar and sandwich shop.

CJ Design are accredited by CIBSE as low carbon energy assessors.

CJ Design are members of the British Council for Offices.  The British Council for Offices is a membership organisation providing research and best practice for those involved in creating, acquiring or occupying office spaces.

 CJ Design are proud signatories of UK Building Services Engineers, declaring a climate and biodiversity emergency and signing up to a commitment to raise awareness and commit to work towards the standard of net zero carbon.’