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Certified Group LTD


119 Reviews

Opening Hours
Today - 24 hours
  • Monday - 24 hours
  • Tuesday - 24 hours
  • Wednesday - 24 hours
  • Thursday - 24 hours
  • Friday - 24 hours
  • Saturday - 24 hours
  • Sunday - 24 hours


Welcome to Certified Group Limited,

Affiliated with Certified Gas Heating Limited.

Established in 2012, A fast-growing company with an impressive reputation accommodating your plumbing, heating and gas constructively. Over the recent years we have started to offer additional services which include: Electrical, renewables, drainage, carpentry, roofing, property renovations, Loft conversions and kitchen extensions, thus the reason for the name change as it fits our image at present. We at Certified Group are known for being passionate, driven, professional and organised tradesmen at all times. We are approved contractors rated a “5 Star company for quality services” on platforms such as Which Trusted Trader, Trust Pilot and Checkatrade etc.
Ourselves at Certified group have a remarkable track record for our hard work, performance, quality, customer service and efficiency.We are based in Greenwich/London as well as Dartford/Kent and we cover the whole of the capital including the surrounding areas.

What we do

  • Heating contractors

    • Central heating systems (installation and servicing)
    • Immersion Heaters
    • Automated Heating
  • Plumbers

    • Emergency plumbing services
    • Unvented cylinder installation and maintenance
    • Water softener installation and maintenance
  • Boiler, central heating and gas engineers

    • Boiler installation
    • Boiler repair
    • Boiler servicing
    • Radiators and central heating
    • Gas cooker installation
    • Gas cooker repair
    • Gas emergencies
    • Gas fire repair and servicing
    • Gas safety testing and inspection
    • Immersion Heaters
    • Power flushing
    • Underfloor heating
  • Gas installers

    • Gas Fires
  • Builders

    • Extensions
    • Garage conversions
    • Loft conversions
    • Plastering
  • Electricians

    • Electric Showers
    • Electrical emergency services
    • Electrical installations
    • Electrical repairs
    • Electrical testing services
    • Landlord safety certificates
    • Fuse boards
    • Outdoor electrical wiring
    • Rewiring
  • Drain clearance contractors

    • Blocked drains
    • Drain and sewer services
    • CCTV drain surveys
    • Drain installation
    • Emergency drain clearance service
  • Property refurbishment contractors

  • Building construction contractors

    • Basement Waterproofing
    • Basement conversion
    • Building construction management
  • Bathroom fitters

    • Accessible bathrooms and showers
    • Wet rooms
    • Electric Showers
    • Bathroom Installation
    • Bathroom design services
    • Bathroom refurbishment
    • Bathroom suppliers
    • Bathroom tiling
  • Kitchen fitters

    • Kitchen design
    • Kitchen installation
    • Kitchen refurbishment
    • Kitchen tiling
    • Kitchen worktops
    • Granite Worktops
  • Carpenters

    • Joinery and carpentry
  • Tile fitters and showrooms

    • Bathroom tiling
    • Floor tiling
    • Kitchen tiling
  • Roofers

    • Flat roofing
    • Roof and skylights
  • Glaziers

    • Double glazed units
    • Double glazing installation
    • Aluminium Windows
    • Double glazing repair
    • Glass boarding up and replacement
    • Replacement window services and repairs
    • Sash windows
    • UPVC Windows
    • Timber windows
    • Triple Glazing
    • Velux windows
    • Window consultants
  • Doors

    • Bi-fold doors
    • Composite doors
    • Door repairs
    • French doors
    • Front door
    • Patio doors
    • Timber doors
    • UPVC doors
    • ​Aluminium doors
  • More Services

    • re-roofing
    • roof refurbishment

Customer reviews

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119 reviews
Customer Service
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Boiler refit with associated underfloor and central heating works. Further bathroom installation.
Customer Service
As a picky, difficult yet not impolite customer, I don't usually provide reviews. Tradesman don't usually like me and vice versa. Aziz and his team however are a rare breed indeed. Working tirelessly with unswerving dedication, they are committed to executing work to a high standard, but equally prepared to explain the process throughout with attention to millimetre type detail if called to do so. The team consistently demonstrate an extremely positive can-do attitude, so often lacking with other engineers and fitters. If you want the job done properly in uncompromised fashion these really are the people to go to. Simple as that. I provide this commendation in good faith after using them for over 11 years.
Customer in Greater London Posted on 27/01/2024 , work completed 26/01/2024
Plumbing and flooring
Customer Service
Aziz and his team (Karim & Chris) carried out a number of jobs on my rental flat in Lewisham: fixed and serviced boiler, balanced central heating system, installed washing machine, fixed the toilet cistern and replaced the kitchen floor. Reliable, punctual, polite and stuck to the agreed schedule (important when there are tenants in situ). They were a pleasure to work with. Aziz kept me informed and updated, and also explained very precisely what they were doing and why, which really helped my peace of mind. I have absolutely no hesitation recommending them. Top blokes. Top job. Thanks guys.
Customer in Greater London Posted on 16/01/2024 , work completed 16/01/2024
3m renovation
Customer Service
Team very tidy clearing after every shift. Aziz very helpful and supportive. Renovation completed on time and to high standard. At least 3 passersby were impressed enough to offer Certified work. I would happily employ them again and highly recommend them.
Customer in Greater London Posted on 16/01/2024 , work completed 18/09/2023
brilliant service
Customer Service
I've worked with Aziz and his team before and so when I wanted some engineered wood flooring I turned to them as my first choice provider. I was not disappointed. They aren't the cheapest, but definitely the best value for money. They gave my a prompt quote, lots of good advice, planned in the work efficiently and promptly, kept to plan, worked incredibly hard and fast, were friendly and courteous, were obsessively tidy, gave great attention to detail, moved all my furniture about for me, solved some potentially challenging problems along the way and did an absolutely fabulous job. I couldn't be happier with the work and the experience.
Customer in Greater London Posted on 29/12/2023 , work completed 29/12/2023
Boiler Replacement - Great Service
Customer Service
Very happy with Aziz and his team, replacing the boiler in my flat. Communication was great, all clear and honest. Work was done quickly and everything kept tidy and clean. Would highly recommend!
Customer in Greater London Posted on 29/12/2023 , work completed 15/12/2023
Fast friendly excellent emergency job
Customer Service
I contacted Certified Group late Weds afternoon because a leak had started in the kitchen which I'd hopefully identified it as the inlet to the washing machine. Aziz phoned, asked a few questions about the problem, we agreed the final price for parts and labour and he advised me to turn off the mains supply. Karim arrived early evening and soon identified the washing machine filter and a short piece of cold water feed pipe as needing replacement. This he did and completely dried and cleaned the floor too. All this took him about 1 hour. A little after Karim left, Aziz phoned to ask if everything was now OK and if I was happy with their service. I certainly am. This was the first time I've used Aziz and co. but will call them first for any other heating or plumbing requirements I have.
Customer in Greater London Posted on 21/12/2023 , work completed 20/12/2023
Bathroom repair
Customer Service
Really swift and efficient service - ETA clearly communicated, job thoroughly explained, performed effectively and comprehensively cleared afterwards - good work I have no hesitation recomending.
Customer in Greater London Posted on 01/12/2023 , work completed 30/11/2023
Water mains leak
Customer Service
Certified Group attended to track down a leak, that they identified as being on the mains inlet pipe. There were also some leaky taps and a toilet needing attention. Aziz and his team dealt with all this efficiently, keeping me well informed at every stage. They arrived on time and put in long hours, always cheerful and a pleasure to have around. The toilet repairs were more extensive than anticipated, but were completed to a high standard well within the schedule. Each day and on completion everything was left neat and tidy.
Customer in Greater London Posted on 21/10/2023 , work completed 09/10/2023
Extremely Professional with high quality workmanship
Customer Service
Aziz and his team were extremely professional and it was really refreshing to have work carried by people who genuinely cared about what they were doing with an extremely high quality of workmanship. Aziz is extremely helpful and has an amazing attention to detail. Everyone had great respect for our home and left it spotless when finished. I would highly recommend.
Customer in Greater London Posted on 19/09/2023 , work completed 19/09/2023
Fix leak, put in new tiles and bath/shower
Customer Service
Aziz and his team did a terrific job identifying the source of a leak in a terraced house bathroom. They removed an old bath, shower, shower screen and tiles. They straightened the wall, added insulation put in new tiles, new bath/shower and reattached basin. There was barely any mess or dust, the protective covers they installed on the carpet worked perfectly. And they were very good at cleaning up and removing rubbish every day. Aziz and his team were all professional, friendly and approachable. The finished job looks fantastic. Hopefully, they will be available for any future jobs.
Customer in Greater London Posted on 10/07/2023 , work completed 04/07/2023