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Welcome to CSI Ltd building and maintenance services and installations to the domestic, markets across the London



Welcome to Control System Installation Ltd, building and Maintenance Company you can rely on for all of refurbishment, extension, renovation, fitter, installations, and renewable energy requirements in Greater London and Hertfordshire for home owners, letting agents, landlords and businesses.


We specialise in fast response, repairs, quality installations and annual maintenance programs. We have the knowledge and expertise needed to ensure that you receive nothing but the best service at all times.

Our reputation has been developed through hard work, reliability and integrity.

If you are looking for an effective & reliable building, maintenance, reapers, Gas, heating, electrical and plumbing company then Control System Installation Ltd can help. We cater to all domestic and business, central heating systems, gas, electrical and plumbing requirements, from Gas Safety Certificates to new boiler installations.


We offer you the highest quality services and Installation for:


  • Gas Equipment Installation
  • Building Refurbishment, Extension and Renovation
  • Maintenance & Services
  • Gas Services & Installation
  • Heating Services & Installation
  • Electrical Services & Installation
  • Plumbing Services & Installation
  • Any Periodic Safety Certificates
  • Landlord safety Certificates
  • Property Body Control
  • Solar Panel Installation
  • Renewable Energy Products Installation
  • Bathroom Installation
  • Kitchen Fitting and Installation


        Bathroom Installation

We can install all bathrooms suites, from the luxury bathroom suite including walk in shower and whirlpool bath, to a space saver bathroom in a smaller property. We can do the cloakroom conversion, fit a downstairs toilet and hand basin and add an en-suite bathroom in a new build or house renovation.

         Shower Installation

We can install a new shower for you, including shower tray and cubicle or we can replace your old shower with a newer model. Your shower can run from your existing water system or you can select one of the many high quality electric showers from manufacturers such as Triton and Mira. Power showers are becoming very popular or we can install for you one of the revolutionary new water saving showers – enabling you to save water, and money. When bathroom space is at a premium, you can opt instead for a shower bath.


         Kitchen Fitter

A member of our kitchen fitters team will survey your existing kitchen and go through your planned layout for any upgrades required to your services

Building regulations requires your building contractor to provide you with an Electric safety installation certificate and a Gas safe certificate on completion of work.


Certified Electrician and Gas safe registered engineer will fit your appliances and follow all the safety steps required to comply with the latest Kitchen fitting regulations.


  Kitchen fitting and installation services


  • Removing and disposing your old Kitchen, tills and plumbing
  • Plastering, Skimming and Painting
  • Kitchen Walls and floor tiling
  • Install new fitted appliances
  • New Electrical installation (lights, spot light, Oven, electric hobs …)


       Renewable Energy – Solar Power


In the search for a greener and cheaper renewable energy sources to replace fossil fuels, the innovative use of solar power has come to the fore. Every single day solar energy equivalent to the electricity 5.9 billion people would use in 28 years is delivered to the earth. As fuel prices rise, the price of solar panels has fallen, thanks mainly to investment in new solar power manufacturing facilities.


         Various Other Services


Plumbing services, hot water cylinders & immersion heaters, Washing machines installation & re-location, Boilers installation, replaced, Cold water storage tanks, rain water disposal units installation, outside taps fitting, guttering repairs, drains & sinks unblocking, Bathrooms renovation, bathroom suites & showers installation & finally LPG cylinders installation.


To learn more about us and the comprehensive range of services we offer, please take a look through our website, If you wish to arrange a no obligation estimate please contact us



If you can't find what you're looking for it doesn't mean that we can't help

please contact us


CSI runs free advice phone lines and online chat offering information on installations Safety (electrical, plumbing, gas and building).

Phone Lines are open between 10:00am and 2:30pm Monday to Thursday and 11.00am to1.00pm on Friday (excluding bank holiday). To contact the Safety Advice call 020 7993 2002.

Online chat is open between 9:00am and 5:30pm Monday to Thursday and 10.00am to 4:00pm on Friday to Sunday (including bank holiday).

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Annual Safety Certificate

I used CSI Ltd to carry out an extensive PAT testing at my dental practice...

Dr Reza Farid Dental Practice

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Honestly Prices

I received a price from CSI for a new boiler installation but I decided to go with another company that gave me very cheaper ...

Shirin N9

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Gas & Electrical Safety Certificate

Very helpful staff over the phone and also on the day of the engineer's visit the guy was really friendly...

David EN4

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Efficient and Organized

CSI Ltd were extremely professional from the initial quote to the end of the job.

Birdwatch Magazine

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