We provide a complete mechanical service from design through to construction, to ongoing planned preventive maintenance contracts.

Specialists in controlled business environments

The strengths and qualities of our staff ensures that we are at the forefront of our key clients minds

Indoor Climate Systems is one of the UK’s leading mechanical services providers. It is our job to bring buildings to life by creating the correct environment.

The Indoor Climate Systems (ICS) brand has been trading since 1992 and specialises in the provision of building services to both the commercial and industrial sectors. The brand is privately owned and run by engineers, ensuring that our company ethos is very much focused on project delivery and quality engineering expertise.

At ICS we are proud to claim preferred contractor status with a number of our clients and, as a testimony to the performance of the company, we have repeat business from all of our clients.

Internally we run a team of high class, fully qualified design engineers and, collectively, over 100 years of onsite project management experience.

The company is certified in ISO9001 and ISO14001, and is a member of Constructionline.


Tailor made process to ensure projects are handed over on time and without defects.


We deliver fit our projects nationwide.


All our CAD and Design work is performed in house by qualified mechanical engineers.

Indoor Climate Systems specialise in creating the ideal, cost effective, controlled environment for the end user.

We are a Mechanically biased building services contractor.
We have been trading since 1992.
We have a high rate of repeat business.
We are always cost driven providing VE at estimation stage.
We always strive to manage the client’s expectations.

Why us?

Indoor Climate Systems offer a one stop design and build mechanical services solution to the CAT A and CAT B fit out industry. ICS pride themselves on ensuring value for money resolutions from conception to defect free delivery. We will engage with our clients to ensure absolute satisfaction in achieving their requirements.

We have over 100 years combined experience in the market and can offer a full turnkey package both design and build or specification and drawings.

At ICS we have our own in house design team and have CAD facilities using the latest technology such as BIM, Revit and Autocad 3D, internal project management and can offer high level budgets at pre construction stage and early concept stage.

ICS have long standing relationships with some of the leading fit out contractors in the UK and can boast that the majority of our work is secured via repeat business.


Draft Design – Informative – Complete – On-Time – Value Engineering


Qualified – Team Work – Communication – Accommodating – Consistent


Friendly – Approachable


Soft Landings – Defect Team – Speedy

Integrated Children’s Hub, Croydon Borough Council

Brief: Refurbishment of an 8 storey office building.
Budget: £1.2m

Qantas, Chiswick

Brief: Refurbishment of offices.
Budget: £750k

Fora Borough, Brandon House

Brief: Full design, build and co-ordination of 7 floors new fit out.
Budget: £1.6M


Meet the Team at Indoor Climate Systems

Ben Revell

Managing Director

Matt Round

Matt Round


Paul Carter

Paul Carter

Contracts Director


Tom Newell

Contracts Director

Diane Unitt

Diane Unitt

Financial Manager

Daisy Blundell

Daisy Blundell

Contracts Administrator Manager

9 November 2021

CVC Installation

Last night we closed down the Strand for a nighttime crane lift onto our site at CVC alongside our client, BW. All went to plan and works continued until 2:30am this morning. Well done to our Operations Director, Tony Fletcher and his team led by Project Manager, Lewis Symes! #team#project#teamworkmakesthedreamwork#engineering#mechanicalfitoutspecialists#indoorclimatesystems#teamappreciation#londonconstruction#CVC#projectmanagment#designandbuild#designdelivered#mechanicalserviceexperts

7 July 2021

Contract Award

1 July 2021

Contract Award

1 July 2021

Welcome to The Cowshed

Our Accreditions