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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.
How can we be so sure?
100% of the reviews we publish have been through our stringent moderation process.
4.9
129 reviews
Recommended
Recommended
by 99% of customers
Sort by
My Review
Customer Service
Quality
Value
Great
Denise, London
, work completed
Recommended
Excellent job carried out
Customer Service
Quality
Value
Aziz was a very courteous young man and very knowledgeable. He replaced a badly bodged condensate pipe and serviced my boiler. I was extremely satisfied with his work, and I now feel confident that it has been carried out properly this time. I will certainly use Aziz again.
Cathy, Essex
, work completed
Recommended
Brilliant job!
Customer Service
Quality
Value
Thanks Aziz. Professional job carried out promptly. Would definitely recommend!
Jack, London
, work completed
Recommended
Excellent work
Customer Service
Quality
Value
Excellent work, neat and tidy friendly service. Thank you. Aziz and Andrew.
John, London
, work completed
Recommended
Great job
Customer Service
Quality
Value
The company turned up on time and worked quietly and efficiently all day installing new radiators. Very conscientious.
George, Devon
, work completed
Recommended
Great recovery
Customer Service
Quality
Value
Aziz came to replace a central heating valve that was stuck. Given the age of the system he advised freezing the surrounding pipe rather than draining down. Unfortunately the freezing failed mid-operation and both upstream isolation valves failed to stop the flow. As a result a larder below suffered water damage. Aziz dealt with this quickly and well, bringing in a cleaner then a redecorator and offering more compensation than we could fairly accept. The C/H is now working correctly.
Mark, London
, work completed
Recommended
Professional, tidy & thorough - brilliant
Customer Service
Quality
Value
Both Aziz & Kem were very thorough & tidy in all their work - even during an emergency call out on a very busy evening for them. They each ensured that the new fittings worked properly & weren't leaking. Excellent plumbing & boiler jobs.
Anita, London
, work completed
Recommended
Professional & thorough
Customer Service
Quality
Value
Very reliable, polite and thorough. Feel assured gas appliances are not safe to use. Even fixed broken cupboard door! Many thanks.
Valerie, London
, work completed
Recommended
Small job but very good, will use again
Customer Service
Quality
Value
Did what I wanted quickly & cleanly really nice guys, was running a bit late but was courteous enough to call & let me know. I like the fact he's helping to train young people too. Very good.
Michael, London
, work completed
Recommended
Friendly
Customer Service
Quality
Value
Punctual, friendly and knowledgeable.
T, London
, work completed
Recommended
Great job!
Customer Service
Quality
Value
He finished the job with great skill and craftsmanship, I would definitely hire him again for another job, great service!
Nino, London
, work completed
Recommended
Great service
Customer Service
Quality
Value
On time, friendly - great service. Reliable.
, work completed
Recommended
Excellent job
Customer Service
Quality
Value
Aziz did an excellent job with my boiler and central heating. He went over and above what would be expected and I would recommend him to anyone who'd was looking for this type of work.
Tiago, London
, work completed
Recommended
Great job for a fair price
Customer Service
Quality
Value
Aziz of Certified Gas and his team installed a new boiler for me, a major job as it involved installing new pipework to change the position and type of boiler to a new combi. They worked hard to complete the job on time in 3 days and charged a very fair price. They were always friendly and left the flat clean - not easy when dragging a large, rusting water tank downstairs over new carpet! I'm very pleased with the work and would recommend them.
Paula, London
, work completed
Recommended
Worth the wait
Customer Service
Quality
Value
I had quotes from others who could start sooner, but I decided to wait a few days before Aziz could start. He seemed the most trustworthy and his prices were the lowest. He consulted me throughout and was completely transparent. His work and work ethic can be trusted.
Abid, London
, work completed
Recommended
Good job
Customer Service
Quality
Value
Friendly, efficient service. Got info on part before coming so could replace it straight away. Were very clean - couldn't tell they has been.
Gwen, London
, work completed
Recommended
Excellent job
Customer Service
Quality
Value
Aziz is hard working, reliable, honest, trustworthy and genuine. He keeps you fully informed during the works. If anything unforeseen goes wrong he fixes it. He really cares for his customers, he goes above and beyond, one of the best tradesmen I have ever employed. I would highly recommend him! Thanks for everything.
Grainne, London
, work completed
Recommended
Professional and conscientious
Customer Service
Quality
Value
Serviced an old boiler, he also checked and bled radiators which was not part of the service. gave useful information and advice. He came back promptly and fixed a small problem that developed.
Clare, London
, work completed
Recommended
Friendly, knowledgeable & friendly service
Customer Service
Quality
Value
Excellent service from a professional and extremely competent company.
Stuart, London
, work completed
Recommended
Great job, highly recommended.
Customer Service
Quality
Value
Aziz and his assistant Mergym were fantastic. Prompt, reliable and personable. They tidied up after themselves, gave great advice on heating systems and clearly take pride in the work.
Ku, London
, work completed
Recommended
Outstanding work.
Customer Service
Quality
Value
Certified Gas Heating Ltd is a great new company in it's infancy, but growing strength to strength due to their excellent customer focus. Our boiler was replaced in a day and system flushed etc. Would highly recommend these guys. Really knowledgeable, helpful and hard working guys.
, work completed
Recommended
My Review
Customer Service
Quality
Value
Was able to come and fix my problem on the same day, although was running late, kept me well informed, did a great job fixing my leaky toilet, all new parts and reasonable cost. Would highly recommend and use again.
Dave, London
, work completed
Recommended
Great Trader
Customer Service
Quality
Value
Aziz and colleague gave an estimate, stuck to it and delivered!!! Really professional & knowledgeable, finally our dream of a dishwasher was realized! Would definitely recommend them!
Cy, London
, work completed
Recommended
Good job, reliable, efficient & no fuss
Customer Service
Quality
Value
Excellent work ethic, reliable, efficient, good & enthusiastic gas fitter. Job done.
Robin, London
, work completed
Recommended
Great job and reliable
Customer Service
Quality
Value
Aziz was reliable and communicated well. It was a relatively simple job which was done well in a timely and efficient manner. Aziz was very friendly and would recommend.
Kam, London
, work completed
Recommended