Professional Tradesman
Mark replaced and fitted a new hot water cylinder, corrected the pipework which was prone to airlocks and replaced some damaged sections of pipe. Mark is very approachable and knowledgeable and works to a very high standard. Communication throughout was always very clear. All the work areas were kept clean and he tidied up afterwards. This is the second time I have used Mark and would have absolutely no hesitation in using him again.
Customer in Hertfordshire
Posted on 29/11/2025
, work completed 27/11/2025
Recommended
Professional and Approachable
Mark replaced four radiators, removed a fifth radiator and capped pipes and also serviced the boiler. He installed all the radiators perfectly level always checking with me the locations I would like them to be fitted and altered pipework very neatly. Mark works to a very high standard and is really approachable. He kept the areas clean and tidied up afterwards. He stayed very late as not to leave me without hot water or heating and made sure everything was working correctly before leaving. I would have no hesitation in using Mark again.
Customer in Hertfordshire
Posted on 10/10/2025
, work completed 09/10/2025
Recommended
Radiators
Excellent service. Mark called ahead and turned up on time and fixed the issues very quickly and was.great value for money. I would highly recommend and he was very polite and helpful.
Customer in Hertfordshire
Posted on 24/09/2025
, work completed 24/09/2025
Recommended
Great workmanship
Mark did a full central heating and gas boiler install, everything was done to a high quality degree with attention to detail. So far the system has been working very well and I can even turn the heating on and off via our preferred Google home app. Mark was always very friendly and professional and we couldn't recommend him enough.
Customer in Hertfordshire
Posted on 06/09/2025
, work completed 01/07/2025
Recommended
Recommended heating engineer
I called Mark when my insurance cover was refusing to complete a repair. Mark visited and was able to identify the fault. ark even spoke with my insurance company telling them the work they stated needed to be completed was against the manufacterers installation guide. Mark quoted a very fair price for the job. It was a tricky job that took longer than expected. Mark kept his word and only charged the quoted price. Mark is an honest and reliable tradesman and I would not hesitate to use his service again.
Customer in Hertfordshire
Posted on 26/07/2025
, work completed 24/07/2025
Recommended
Plumbing excellence & professionalism
Mark cut/capped existing 15, 22 and 28 mm pipes and installed six lever valves in our bathrooms, staying until 8 pm to ensure that everything was complete and to his usual high standard. We have used him twice before as his commitment to a high quality of work and standards and meeting the needs of the customer is paramount. He always discusses, explains and listens to customers' needs and instils confidence. He is very friendly, approachable and committed to everything that he does. We will use him for all our plumbing needs without hesitation.
Customer in Hertfordshire
Posted on 03/06/2025
, work completed 02/06/2025
Recommended
Worcester Bosch boiler replacement
I was very impressed by the manner in which Mark executed the work and the time it took. Reconfigured pipework in a very tidy and neat fashion. Well pleased. Thank you.
Customer in Hertfordshire
Posted on 30/05/2025
, work completed 01/11/2024
Recommended
Professional job
We found Mark's details on Which Trusted Trader and approached him for a quote. We went with him because of his attention to detail, ability to listen and address our concerns. We wanted , not only to replace the boiler, but to improve our system. He dealt with difficulties he found, without charging extra. We are delighted with his thoroughness. A professional job, done well!
Customer in Hertfordshire
Posted on 27/05/2025
, work completed 23/05/2025
Recommended
Extremely satisfied customer
I obtained Mark’s details from the list of Worcester Bosch accredited installers and decided to select him to replace our gas boiler based on the many excellent reviews posted about his work. I was not disappointed. Mark was excellent, he carried out the work as planned, keeping us fully informed of progress. I would have no hesitation in using Mark again and recommending him to anyone looking for a highly competent and professional central heating engineer.
Customer in Hertfordshire
Posted on 26/05/2025
, work completed 14/05/2025
Recommended
New Boiler
Mark fitted a new boiler, radiator and thermostats to all rads. Also removed an old gas fire. Very professional and efficient. Knowledgeable, friendly and clean worker. Would recommend his services.
Customer in Hertfordshire
Posted on 14/04/2025
, work completed 14/04/2025
Recommended
Great Work
Mark fitted a replacement Worcester Bosch boiler for me following recommendations from a previously engaged heating engineer. This did not solve the heating issue that I had with the system. He returned for a second visit to re-pipe the heating pipes in the airing cupboard that he thought was the most likely cause of the system problem. I am delighted with the results. A thoroughly professional tradesman, very reliable and the job done at a fair price.
Customer in Hertfordshire
Posted on 29/11/2024
, work completed 28/11/2024
Recommended
Highly Professional - someone I trust and rely on - and a great guy
I have used Mark to install and service my boiler for several years. I trust him implicitly not only because I have complete faith in his technical expertise, but also because I have found him to be honest, fair and reliable - and a really nice chap. What more could anyone ask of a service provider?
Customer in Hertfordshire
Posted on 10/10/2024
, work completed 10/10/2024
Recommended
Exceptional Work
I consider myself very lucky to have come across Mark, He is one in a million. I had a boiler installed two years ago, the installers convinced me that the new boiler and cylinder would not fit in the area where the existing one was. They put it in the cupboard in the small bedroom. I was never really happy with this arrangement but thought there was no other option. Recently, I saw a guy working near where I lived, I asked for his opinion, he put me onto Mark. After initial contact Mark, told me no problem to do what I required and would quote, this he did by the following day. Price was good so I went ahead. His work was exceptional, did everything I required, put everything back in place. I was impressed with his knowledge and experience. Finished the job when he said he would, no hidden Suprises, cleaned-up, also serviced my boiler and Gas fire. I have since called him back again to fit a new radiator, again good Job. Mark is a very affable, good humoured, friendly, and most of all a very experienced engineer I highly recommend him and will always use him for any future work.
Customer in Hertfordshire
Posted on 06/10/2024
, work completed 20/08/2024
Recommended
Great, friendly, fast fix
Mark did a great job of fix my water tank by replacing the elements. He worked solidly on the job and cleared away any mess. I would definitely use him again in the future.
Customer in Hertfordshire
Posted on 22/07/2024
, work completed 18/07/2024
Recommended
Prompt, efficient and courteous
Contacted Mark late in the afternoon 2 days ago, regarding a leak I had discovered in our airing cupboard. He said he'd call in on the way home and have a look at the source. He confirmed our suspicions that it would be the water cylinder and said he'd let us know a price when he got back. He was unable to ring because of getting home late but called first thing yesterday morning to tell us a price. We agreed for the work to be done, as it was much less than we had anticipated, and he said he was able to fit us in today. He arrived on time and was polite and courteous. He set about draining the system and went out to get the cylinder from the supplier. Not out for long and cracked on with the job. After getting to a stage where it could be tested, there was a secondary fault identified with the ball valve in the loft tank, so a price was given and agreed on, and off he shot to get the part. New part fitted and on to a secondary test. Mark also found a faulty diverter valve (hasn't worked properly for as long as I can remember) and this was priced up. He had to shoot out again and just made it to the supplier before closing. The work is all complete within 48 hours of discovery, and all for less than we had originally anticipated just for the cylinder. Mark has also been able to advise on some preventative maintenance to mitigate the risk of a potentially expensive malfunction. All in all, very impressed with his professionalism and standard of work.
Customer in Hertfordshire
Posted on 17/07/2024
, work completed 17/07/2024
Recommended
Fantastic service
Mark attended to look at a leak in our loft and fit a hob. The parts needed for the leak were obselete, however, this did not stop him traveling to multiple suppliers until he found a stockist. He worked quickly and efficiently, when a problem occurred he was able to think outside the box to solve it. His work was excellent and we would thoroughly recommend him.
Customer in Hertfordshire
Posted on 22/06/2024
, work completed 11/06/2024
Recommended
Boiler installation
Mark is trustworthy, reliable , diligent and professional. He does what he says he is going to do, when he says he is going to do it, gor the amount quoted. After care is superb. Very pleased indeed with the advice, support and workmanship. Would definately recommend.
Customer in Hertfordshire
Posted on 18/03/2024
, work completed 09/01/2024
Recommended
Excellent Service
Mark came round to rewire our central heating controls and fit a Hive system. Whilst completing the work he noticed a problem with our Hot Water thermostat and replaced it for us. All his work was within the budget he quoted and he did not charge us anymore labour to resolve any of the extra issues. Our Heating is now working better than ever before we are so pleased with his work and he is a really nice guy too!! Would highly recommend.
Customer in Hertfordshire
Posted on 18/02/2024
, work completed 13/02/2024
Recommended
Combi boiler install
Mark replaced our old boiler with a combi boiler. He did the job without a lot less fuss than we anticipated, no seeming problems and every thing was done professionally and very neatly. He was a nice pleasant man and polite. He explained how every thing worked and I would recommend him to do your jobs.
Customer in Hertfordshire
Posted on 02/02/2024
, work completed 19/01/2024
Recommended
Great work to a set budget.
Mark fitted us a replacement gas boiler for a competitive budget. He did the work over two days and did not start before 10am which allowed us to be up and about without rushing in the morning. His work is professional to a high standard. He is easy to get along with and has a pleasant demeanor. If you need a new boiler I would recommend him to you.
Customer in Hertfordshire
Posted on 31/01/2024
, work completed 30/01/2024
Recommended
Excellent job at a fair price
Mark Hopkinson gave us a competitive quote, and importantly completed the job very neatly indeed (important as the new boiler would be installed in a newly refurbished Utility Room, and we did not want brand new surfaces etc to be damaged). He did an excellent job, even better than expected, exceptionally neat, and at a very competitive price. Really pleased with his work. Also liked that he did the job over 2 days - ensuring it was done to a high quality standard, not rushed, corners not cut. Looks great, works superb.
Customer in Hertfordshire
Posted on 15/01/2024
, work completed 12/01/2024
Recommended
Trusted to do a great job!
Gas boiler replaced at agreed time and within agreed budget. The reason I used Mark was because I knew that the work would fully comply with legal and trade requirements and be done to exacting standards. Eg:- spacing between pipe brackets is uniform. The standard of Mark’s workmanship goes beyond that I have experienced with tradesmen in the past. Would definitely recommend if you want a perfect job done.
Customer in Hertfordshire
Posted on 02/12/2023
, work completed 29/11/2023
Recommended
Fitting new Worcester Boiler
Mark came recommended by neighbours and was able to provide a clear quote for replacing an existing boiler. He explained very clearly the options and benefits of different installations. Having made the decision Mark provided a clear timescale for the work which was completed on time. We are delighted with the system and due to Mark’s work have a 10 year parts and labour guarantee on the boiler. We would recommend Mark without any hesitation.
Customer in Hertfordshire
Posted on 02/08/2023
, work completed 19/07/2023
Recommended
Top class service fitting a new Worcester Boiler
From the word go we knew we were in safe hands with Mark. A brilliant Gas and Heating engineer, he's incredibly knowledgeable, efficient and fitted us a brand new Worcester boiler at a competitive price. Mark is very thorough in his work and gave detailed explanations on how to work our new system. He was friendly, polite and a delight to have in our home. We are extremely pleased with the finished product and look forward to welcoming him back next year for our boiler's first service. We wouldn't hesitate in recommending his services to anyone. Thank you, Mark.
Customer in Hertfordshire
Posted on 12/07/2023
, work completed 12/07/2023
Recommended
Replacement boiler
When Mark came to estimate the work needed he went into great detail as to what to expect on the days when the work would take place. He answered all of our concerns. When he started the work he was methodical and assured as to what was being done. It's not a clean job replacing a boiler but he kept the mess to a minimum. He said that a further part of work may be required relating to the gas supply pressure. He quoted that work seperately but as it turned out that work was not required. All the work was done more or less on schedule (by 1 additional day) but the quote there were no additional costs. Mark is an excellent and conscientious worker and I would not hesitate to recommend him for any work in this area.
Customer in Hertfordshire
Posted on 29/06/2023
, work completed 22/06/2023
Recommended