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Endorsed by Which?
Certified Group LTD
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
About
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
My work
Customer reviews
Why you can trust these reviews
All reviews are verified as being genuine and a true customer of this trader.
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100% of the reviews we publish have been through our stringent moderation process.
4.8
119 reviews
Recommended
Recommended
by 99% of customers
Sort by
Full 4 bedroom house renovation
Customer Service
Quality
Value
I had Aziz from certified group ltd come and do a full house renovation for me which included full plumbing, electrical rewire, plastering, painting and decorating etc. from the beginning to the end Aziz and his team were an absolute delight! Really professional tradesmen, I'm so happy with all the works that has been done to my home, everyone that comes over has been complimenting how amazing it looks! In fact two of my friends has asked for Aziz’s number. They are always on time, they clean after themselves and have always left my property in an immaculate condition. I recommend Aziz and his team to everyone. You will not be disappointed! Thank you Aziz and the rest of the certified group team. I will definitely be using you again very soon.
Customer in Greater London
, work completed
Recommended
Great plumbing and building team
Customer Service
Quality
Value
Aziz and his team (special mention to Karim and George) undertook extensive repairs to our hot water and central heating systems in our apartment. They worked extremely hard to produce a quality professional result. Our impression is that they will not compromise in order to achieve a high quality long term solution and their aim is to foster long term clients. Completed within time frame and on budget. Highly recommended!
Customer in Greater London
, work completed
Recommended
Great Work
Customer Service
Quality
Value
Aziz and his team came and upgraded the heating system in my house, incl the replacement of a very old boiler with a modern one, the gas pipeline upgrade, disposal of old dirty water tanks, they also resolved many potential problems in the kitchen. Aziz and his mates showed professionalism and sometimes they worked long hours eg 8am to 8pm to keep up with the plan while working on more items associated with the plan... I'd recommend them.
Customer in Surrey
, work completed
Recommended
Boiler replacement.
Customer Service
Quality
Value
Good job professionally done with respect for my property. Engineers clearly knew what they were doing and took pride in doing a good job.
Customer in Hertfordshire
, work completed
Recommended
Great Service, Top Work
Customer Service
Quality
Value
This was the 3rd job picked up by Certified Group and they continued to deliver. Each job has ended up having quirks - the latest being some plastic piping that needed replacing - and they've been extremely helpful and communicative throughout. Hopefully, all my gas and heating needs are sorted for the time being - and it's comforting to know they're there to support in case of any issues. Cannot fault them at all. Thanks, guys!
Customer in Greater London
, work completed
Recommended
Trustworthy, reliable and hard working team
Customer Service
Quality
Value
Aziz and his team previously installed my boiler. As I was very happy with their work from the last time, I recently asked them to fit new radiators for me. Brand new radiators aside, I am extremely happy with the work ethics of the team. I found the team to be genuine, thorough and hard-working (i.e. being on time and working straight through from 8.30am to 8.00pm in order to maintain their schedule). Very friendly demeanor and the team cleaned up as they went along! There was great communication amongst the team as well as the communication with me about the work at each step. Needless to say the project ran smoothly from start to finish. They also went the extra mile and helped put up a heavy mirror and an installation for me even though it was not part of the work. A great team!
Customer in Greater London
, work completed
Recommended
High quality job - multidisciplinary team
Customer Service
Quality
Value
Aziz and his team helped me to refurbish a new property. The work involved decoration, plumbing, electrical updates and they were able to cover all these areas with separate experts. Communication was great and continuous. Any issues found while doing the work was discussed in advance and thoroughly. The team delivered a high-quality finish and they left the property in pristine conditions. Even when there was an issue after they left, they sent someone to sort it promptly without asking for additional fees. I found them slightly more expensive than the competition but I guess you need to pay the right price for a high-quality job and they delivered on it! I would definitely use Certified Group in the future!
Customer in Greater London
, work completed
Recommended
Great Considerate Work
Customer Service
Quality
Value
Replacement of shower unit originally installed by Ream without sufficient preparation. Aziz and his team removed the old units and tiles and we were shocked at the poor preparation by the Ream installer which had caused the shower tray to flex and leak. Aziz had to cut back plaster which had become soaked as a result. The team managed supply issues and were very considerate working around us whilst we were working from home too. Would certainly recommend the Certified team to anyone.
Andrew in Greater London
, work completed
Recommended
Happy customer, good work
Customer Service
Quality
Value
They were very friendly, professional. They did an excellent job, very neat.
Which? Trusted Traders Consumer
, work completed
Recommended
Avoid at all costs
Customer Service
Quality
Value
I called this company first to repair my old boiler system which had failed - and really wish that I hadn't. Their call out fee is £144 inc. VAT. The guy turned up and said that the electrics in the timer were 'fried' and that it would be unsafe to repair. I would need a new Combi boiler. He quoted me just under £7000 for that but graciously offered to deduct that from the £7000 if I used them to replace the boiler. Stupidly I believed him and got quotes for a new combi installation which ranged from £3000 to £5000. I then got a guy who refused to quote me as it could be fixed with some new parts - it was a simple electrical fault. Cost £350 and is working fine. So I paid £144 for nothing and was then blatantly lied to. Also creepily the guy texted me to ask if I was 'ok' as it was really cold at that time. When I said I was getting other quotes - silence. Avoid this company at all costs.
Customer in Greater London
, work completed