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Complete Heating & Gas Ltd

10/10

Chessington, Surrey

£1,000 guarantee T&Cs apply

Checkatrade member since May 2013
10

Public liability insurance is unverified

Customer Reviews

Write a review

10 /10

Based on 12 reviews over the past 12 months

Quality of work

10

Reliability

10

Communication

10

Reviews (725)

  • 10

    Central Heating

    Posted 11 May

    Reliable & Knowledgeable Heating Engineer

    Gary replaced my boiler about 5 years ago & did an excellent job.... clean, tidy & professional. Since then he has provided the annual service & always responds immediately to my WhatsApp requests. Recently the heating would occasionally fail to fire up . I messaged Gary who replied with the probable cause & fitted me in the following day. His diagnosis was spot on..... system fixed, tested & the overdue annual boiler service all done efficiently & without fuss in less than 2 hours. I can't recommend Gary enough.
    Verified reviewer
    Job location: KT8
  • 10

    Plumber

    Posted 26 April

    Very good

    I have used this company several times for boiler safety checks, boiler maintenance and various plumbing works. Gary is very reliable and does a good job. I will use him again
    Verified reviewer
    Job location: SW19
  • 10

    Central Heating

    Posted 25 March

    The best service !

    As usual. A very efficient visit by Gary. Complete heating are always prompt , efficient and competitively priced. We planned an annual boiler service but had to ask for 2 annoying system leaks to be repaired. Gary managed to fix both in one visit. A perfect service
    Verified reviewer
    Job location: KT5
  • 10

    Plumber

    Posted 18 January

    Great Service And Honest Advice

    I have been a customer of Complete Heating and Gas Ltd for a few years now, and have always been happy with the standard of work carried out and the high level of service received. Gary is always courteous and polite and provides good honest advice and guidance, and I therefore have no hesitation in recommending him and CH&GL. He sourced and fitted a replacement for one of the valves in our shower mixer recently, to cure a leak that had developed before Christmas. As usual, the work was completed quickly and efficiently, and at a very reasonable price. I'm very happy to endorse CH&GL.
    Verified reviewer
    Job location: KT3
  • 10

    Central Heating

    Posted 06 January

    Reliable and Friendly Proessional

    The Gas Safety Certificate of my Flat happens to need renewal during Festive Season. Gary always communicates effectively with the residents of the property to conduct the job. He is also very punctual, friendly, easy going and also professional at the same time
    Job location: KT2
  • 10

    Central Heating

    Posted 01 December 2025

    Heating Engineer and Plumber

    Gary fixed our boiler - he diagnosed the problem, sourced the part and fitted it all at a very reasonable cost. In the past he has also fixed our underfloor heating and leaks - he is extremely reliable and efficient.
    Verified reviewer
    Job location: KT3

Photos

Company Info

Owner

Mr Gary Cousins

Ltd Company

13 years on Checkatrade

VAT Registered

No

Domestic WorkFree EstimatesInsurance Work Undertaken24 Hour Call-out

Complete Heating and Gas - THE FACTS:Appointments missed since being a member of Checkatrade - 0Customers charged more than quoted for without being informed - 0Out of the last 300 reviews:294 customers scored us 10 for courtesy290 customers scored us 10 for time keeping286 customers scored us 10 for workmanship So if you are looking for a company that is courteous, on time and works to a high quality finish, call us today! Get ready for winter with are fantastic offers on boiler installations and servicing!Now offering up to 10 year free parts and labour warranty with Worcester boilers.BOILER FINANCE - Now available! 0% interest free for up to 12 months or up to 10 years 9.9%New boiler installation and central heating specialist - We are a Worcester Bosch approved contractor. Please call for free quote. All aspects of gas, central heating.

  • Over 15 years’ experience in install and design of central heating systems
  • Over 100 boilers installed locally each year
  • Long warranties on boiler and work
  • Competitive pricing with high quality work

Our knowledge and competitive pricing is why complete is the no.1 choice, in our opinion.

  • New Boilers
  • Boiler finance
  • 10-year guarantee’s
  • Boiler servicing
  • Full central heating systems
  • Replace radiators
  • Landlord gas safety certificates
  • Thermostatic radiator valves
  • Central heating wiring and controls
  • Un-vented cylinders / mega flows
  • Thermal stores
  • Combination boilers
  • System boilers

We are praised by our customers for giving honest and impartial advice, this has helped us to become one of the leading local companies for boiler install and all aspects of central heating.Please don't take my word for it though just take a look at the growing number of reviews.Look forward to hearing from youGary Cousins www.completehg.com(Director - Complete Heating & Gas LTD)

Accreditations and awards