Primary trade Builder
131 ratings
ratings badge

100+ ratings

member since badge

Member for 9 years


131 ratings


Welcome to Certified Group Limited, We are a sister company to Certified Gas Heating Ltd. Started of as a dedicated and driven apprentice who started working within the plumbing trade from the age of 15. Established in 2012, We are a fast growing company accommodating your plumbing, heating and gas utilities effectively. Over the years we have started to offer other services which include: Electrical, renewables, drainage, carpentry, roofing, property renovations and kitchen extensions hence the reason for the name change as it fits our image at present. We at Certfied group are known for being professional, organised and enthusiastic at all times. We are approved contractors rated a “5 Star company for quality services” on Which Trusted Trader, Trust Pilot and other platforms. We at Certified group have a fantastic reputation for our hard work, performance, quality and efficiency. We are based in Greenwich SE10 London and cover whole of the capital and surrounding areas. We offer a 24/7 emergency services, Landlord safety certificates, Central heating and boiler installations, Breakdowns, Repairs, Power flush and more.

Ratings & reviews

CERTIFIED GROUP LTD rated for Bathroom fitter in Greenwich


Overall rating

131 total ratings 0 last 30 days 0 last 6 months 0 last 12 months

12 Jul 2018

Gas / Heating engineer

These guys are amazing! Aziz and his team recently undertook some major work on our home, including the complete removal of existing kitchen and slate floor, installation of underfloor heating, plumbing in of new boiler and relocation and replacement of pipe work throughout our house. Everything went so very well, The workmanship was of the very best quality and always undertaken with the utmost care for our home. I wholeheartedly recommend their services, Thank you so much Aziz, Kebba and the team.

, SE15

15 Jun 2017

Gas / Heating engineer

Clean, tidy and efficient. Turned up on time and completed the work to a high standard. Would recommend and use again. Thanks.

, SE20

15 Jun 2017


I am extremely pleased with the work done by Certified Gas Heating Ltd. I had a lot of trouble finding what I consider a good & reliable plumbing company at affordable prices. Certified Gas Heating ticks all of the above and went beyond my expectations. I like the "customer centric" service they provide - they listened to me carefully and really paid attention to my issues and expectations while also guiding me and providing me good advice to chose a fit for purpose solution that was cost effective to me

, N19

30 May 2017


Aziz and his team were professional and helpful in every way. They always gave the right advise for the procedure that was being done, though it was not the easy way to get done. Further they went out of their way to do small bits that was not part of the job. Lastly and most important - very neat and tidy work. Thank you guys.

, SE12

30 Apr 2017

Gas / Heating engineer

Excellent service and quality! Aziz and his team have done great job, identifying the problem and implementing agreed solution in record time. Aziz was very helpful and provided us very competitive pricing on full heating system replacement. His team was very efficient and worked hard to get the work done in short space of time. I probably would have saved myself lots of money and hassle if I would heve received his advice before. Many thanks for great job!

, SE10

14 Feb 2017


Excellent job at fair price. Aziz and team completed the installation of two additional radiators in my kitchen and breakfast area, and added a Nest thermostat. I was quoted a reasonable price, Aziz and team were friendly and courteous, and they worked late to get the job completed. More importantly, the work was completed to an extremely professional and high standard! I would not hesitate to both recommend or use Aziz again.

, BR2

25 Dec 2016

Gas / Heating engineer

Aziz was great and carried out the work brilliantly. He also fixed a few other things wrong in the flat and charged a fair price. Would def recommend.

, E1W

29 Nov 2016

Gas / Heating engineer

I couldn't ask for more, top-notch service and after-service, more power to you.

, SE12

29 Feb 2016


Very professional , solved gas leaks promptly and worked well with national grid when gas needed cutting off / re citing. Would recommend to anyone - used many plumbers and Aziz was fantastic.

, NW6

06 Feb 2016

Gas / Heating engineer

These people are in high demand. It was worth the wait to have a trustworthy tradesman. He was transparent about the work and consulted me throughout. He gave me the best advice and did what was best for my needs. You can't put a price on trust. His prices were also competitive.

, SW16

26 Jan 2016

Gas / Heating engineer

Great experience throughout the process. From a call within 10 minutes of placing the job, to a quote within days and carried out the work shortly after. They fitted a new boiler and several radiators. Workmanship was clearly visible in terms of their attention to detail, from moving pipes closer to the wall, to repairing drains which wasn't even in the quote, all to ensure a quality finish. Will certainly recommend and use again if needed.

, E14

21 Jan 2016


Aziz was able to come around really quickly. He was great at explaining what the issues were and what was required in order to rectify the issues. He completed the job quickly and efficiently.

, NW5

28 Dec 2015

Gas / Heating engineer

Aziz was, and continues to be , a top professional. He takes pride in his work and he's passionate about providing an exceptional service. He's just been back for our boiler's first annual service (free of charge) and - as usual - he didn't disappoint. He goes above and beyond when it comes to taking care of his customers. We will use Aziz all the time from now on and I cannot recommend him highly enough. Aziz, you're a star!! :-)

, SE12

18 Jul 2015

Gas / Heating engineer

Had a fantastic boiler and radiator change job done by Aziz and Mergym. They are highly professional, reliable and a pleasure to meet. Highly recommended - good people can be hard to come by! Many thanks Ku

, SW2

30 Jun 2015

Gas / Heating engineer

Excellent delivery of the project in a professional, caring and tidy manner. The pride that Aziz and Merch took in their work shone through in every aspect as they fulfilled the promise of their original quote and more whilst keeping to budget and deadlines. Could not have asked for more. Good to be dealing with skilled people who take pride in their work and delivery rather than the usual bog standard company operatives. I would recommend them without hesitation, in fact I already have.

, IG5

15 Jun 2015

Gas / Heating engineer

Aziz was courteous and reliable. He got the job done and even more! Very pleased !

, EC1M

08 Jun 2015

Gas / Heating engineer

Very happy customer. Aziz was fantastic, very professional and the quality of his work was superb. I'd recommend him to anyone. In fact, I've already forwarded his number to friends and family!

, SE22

26 May 2015

Gas / Heating engineer

Brilliant. Polite, hardworking and professional. Went above an beyond my exceptions and will have no hesitations recommending Aziz to anyone who is in need of his skills.

, E1

12 May 2015


Aziz and his team were absolutely incredible! They went aove & beyond to provide a 5* service and left everything clean & tidy. They went out of their way to ensure that we understood the new heating system & even came back to fit our shower after it had been delayed in the post at no extra cost. Will definitely be using Certified Gas Central Heating Ltd in the future & have already recommended them to our friends. You gave two very satisfied customers!! H&T

, BR3

02 May 2015


Aziz and his co worker worked very hard during the 5 1/2 hours they were with me doing various plumbing tasks for a fixed price. They did a good quality job, even going back on items fitted to ensure they were perfect. They wanted it done right even if it took longer. They were courteous and professional. And they cleaned up after themselves. I would definitely recommend them to friends and colleagues.

, SW17

Ask an expert

CERTIFIED GROUP LTD answered questions about Bathroom fitter in Greenwich

's question
Sun 3 Jan 2016 14:46pm

How much to replace one pipe central heating with two pipe. 8 radiators in total

  • A. Miah's Answer
    Mon 4 Jan 2016 23:30pm

    Hi Andrew, Just seen your Question. To replace your current one pipe system to twin pipe such as flow & return pipes it really all depends on the route and how much pipe work really needs to be installed. Its best you contact me on zero seven nine zero eight two three nine six six five. We can advise you. Thanks Aziz

's question
Sat 28 Jun 2014 11:9am

Which professional should I approach to install ventilation in my bathroom? Would involve drilling a 100mm hole through a 400mm brick wall.

  • A. Miah's Answer
    Sun 29 Jun 2014 11:18am

    You can use a plumber

Trade certifications

Click logos to see more details

Gas Safe Certifications

This tradesperson is Gas Safe registered to work safely and legally on gas appliances in the UK.
Find out more about Gas Safe

Registered name
Certified Group Ltd
Reg No:
Certified Group Ltd

Part P Certifications

This tradesperson is Park P registered and their work meets legal safety standards.
Find out more about Part P

Registered Name
Certified Group Ltd
Registered Body:
Reg No:
Certified Group Ltd

Areas serviced

Services available

Top trades offered by CERTIFIED GROUP LTD

Primary trade


Cellar & Basement Conversion


Garage Conversion

Bathroom fitter

Bathroom Design

Bathroom Installation

Complete Bathroom Refurbishment


Garden Wall

Chimney Building / Repair

Pointing / Repointing

Carpenter / Joiner

Wooden Staircases

Wooden Doors - Internal

Wooden Shutter