Endorsed by Which?

M & M Gas Services Ltd

5.0

73 Reviews

Opening Hours
Today - 08:00–17:00
  • Monday 08:00–17:00
  • Tuesday 08:00–17:00
  • Wednesday 08:00–17:00
  • Thursday 08:00–17:00
  • Friday 08:00–17:00
  • Saturday 08:00–12:00
  • Sunday - Closed

What is a Which? Trusted Traders Hertfordshire Trading Standards Approved Endorsement?

Which? Trusted Traders has partnered with Hertfordshire Trading Standards to create a Hertfordshire Trading Standards Approved endorsement. In addition to our standard trading standards assessment, this trader has had a DBS check and is subject to a Trading Standards intelligence check

Organisations and Awards

Jul 2020

About

We are a family run business based in st.albans, with over 30 years experience. We cover anything from a dripping tap, to full plumbing and heating systems. We are gas safe registered. We pride ourselves on our levels of service and quality of work.

What we do

  • Boiler, central heating and gas engineers

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

    • Bathroom refurbishment
    • Wet rooms
    • Bathroom tiling
    • Bathroom Installation
    • Bathroom design services
    • Accessible bathrooms and showers
  • Plumbers

    • Emergency plumbing services
    • Unvented cylinder installation and maintenance
    • Water softener installation and maintenance
  • Renewable energy

    • Air source heat pumps

Customer reviews

Why you can trust these reviews

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5.0
73 reviews
Customer Service
5.0
Quality
5.0
Value
4.9
Sort by
Excellent
Customer Service
Quality
Value
Highly recommended. We wanted to add our underfloor heating under hive app control. British Gas engineers has tried and failed. Shaun and Darren did the job. No hassle or problems. Considerate and friendly.
Customer in Hertfordshire Posted on 31/10/2025 , work completed 30/10/2025
Quick, reliable and friendly at a good price
Customer Service
Quality
Value
Excellent service. Very happy customer. Martin and Jack were very quick to respond to install my new boiler, very pleasant, helpful and professional to deal with and I'd strongly recommend them.
Customer in Hertfordshire Posted on 29/10/2025 , work completed 03/10/2025
Usual High Quality Service
Customer Service
Quality
Value
This is the third year running I have used M&M for my annual boiler service. As per the previous two years, the work was done very effectively and efficiently with absolute minimal disruption. The engineer ( a new employee) turned up exactly on time and carried out the work with a smile, and was very sociable. Would not hesitate recommending M&M.
Customer in Hertfordshire Posted on 21/08/2025 , work completed 20/08/2025
Excellent service
Customer Service
Quality
Value
I had a problem with my gas boiler and called M&M. I was immediately impressed with the service I received and the prompt response. Having decided to replace the old boiler, Sean was able to give me an instant quote for a replacement, plus a replacement pump and thermostat, and new taps in the downstairs toilet. Having agreed on the quote, the work was carried out very quickly to a very high standard. During the whole process, I was impressed with the business-like but friendly attitude, and they gave me confidence in their experience and knowledge. Will definitely use again and highly recommend.
Customer in Hertfordshire Posted on 25/07/2025 , work completed 22/07/2025
Highly Recommended
Customer Service
Quality
Value
Easy to arrange for them to come and assess the issue. They were polite, friendly, efficient, and knowledgeable. Would definitely use this company again.
Customer in Hertfordshire Posted on 15/07/2025 , work completed 11/07/2025
Great service
Customer Service
Quality
Value
Great service, flexible, responsive, and reliable. First time fix, when others were unclear on the issue or how to identify the problem.
Customer in Hertfordshire Posted on 11/07/2025 , work completed 11/07/2025
Emergency Call out no heating
Customer Service
Quality
Value
I have had several plumbers in the past, and many have retired or moved away. Found M&M lived just around the corner from me, so gave them a try. Called at mine on his way home and identified the problem. Great service. Made arrangements to get parts, and one of the team called to fix the problem. Will now be on my list for any future problems and will recommend them to others. Prompt and friendly service, well done!!
Customer in Hertfordshire Posted on 16/06/2025 , work completed 02/05/2025
Quick response and great service
Customer Service
Quality
Value
We woke up to cold water and Sean came very promptly and diagnosed a blocked filter in the boiler (which was easily sorted) but warned that this was a quick fix and we would also need two new motorised valves. He gave us an estimate and scheduled the repair, which was carried out quickly and efficiently by his team. It didn't go completely smoothly, but we were particularly impressed by the speed of Sean's response to the issues that emerged on two occasions until the system was running properly. We have used M&M for different jobs over several years now and would thoroughly recommend them
Customer in Hertfordshire Posted on 12/05/2025 , work completed 28/04/2025
Leaking Rad
Customer Service
Quality
Value
Thermostatic valve was changed, no more leaks. I have dealt with Martin from M&M for a few years now, I find him to be friendly and helpful. Will continue to use when needed.
Customer in Hertfordshire Posted on 08/05/2025 , work completed 08/05/2025
Bathroom taps replaced
Customer Service
Quality
Value
Taps in the bathroom sink needed to be replaced. Piero came on time, disconnected the water and replaced the taps, then resumed the supply. All done quickly and efficiently for the agreed charge.
Customer in Hertfordshire Posted on 24/04/2025 , work completed 17/04/2025
Installation of hot water tank and fitting of shower pump
Customer Service
Quality
Value
M&M Services install a new hot water tank and a shower pump I must strongly recommend them they were the right price I believe very helpful and most friendly I would use them again excellent service,
Customer in Hertfordshire Posted on 15/04/2025 , work completed 14/04/2025
Efficient, friendly and professional
Customer Service
Quality
Value
Excellent service - arrived in good time, completed the work promptly and at a reasonable price. Definitely recommend
Customer in Hertfordshire Posted on 26/02/2025 , work completed 26/02/2025
Underfloor heating repair
Customer Service
Quality
Value
We have had an issue with our underfloor heating for a long time and after several different plumbers and many hours work, 2 new motors and a new manifold later it was still not functioning how it used to. Shaun was friendly and professional and quickly got to work assuring us that he would get to the bottom of it, which he did and very quickly! Shaun was the only plumber who picked up that there was a blockage in the pipe that was restricting the heating from working properly, this was then cleared and the heating was working properly once again! He checked we were happy with it after 24 hours and all is still working and warmer than it has been for a very long time! I highly recommend M&M gas services and we will certainly not need to look anywhere else again for plumbing issues.
Customer in Hertfordshire Posted on 07/12/2024 , work completed 06/12/2024
Repair to Central Heating System
Customer Service
Quality
Value
In 2022 Martin installed a new boiler for us in our old heating system and has carried out a maintenance service each year. We recently experienced a system failure resulting in the boiler not following the programme and shutting down. On making an early morning phone call we discovered that Martin was sick in bed but he advised us how to manage the situation without loosing heating until he could get an engineer out later that day. It was discovered that a motorised valve had failed in the old system and this was replaced first thing next day. Under the circumstances a first class service.
Customer in Hertfordshire Posted on 25/11/2024 , work completed 21/11/2024
M & M Gas services Ltd
Customer Service
Quality
Value
M&M has carried out a number of projects over the past 10 years including a particularly demanding one which involved moving our boiler and hot water system into the roof space. They also carry out our regular boiler servicing at our property, and, our business properties, and some emergencies. Martin, Shaun and colleagues have always been punctual and reliable, friendly and capable. I highly recommend this company.
Customer in Milton Keynes Posted on 18/11/2024 , work completed 14/11/2024
Punctual, friendly, efficient
Customer Service
Quality
Value
M&M have helped us out several times over the last few years, including annual boiler servicing and some emergency leaks too! Martin and his colleagues have always been punctual and reliable, friendly and capable. I wouldn't hesitate to recommend this company.
Customer in Hertfordshire Posted on 18/10/2024 , work completed 01/10/2024
Great work
Customer Service
Quality
Value
M&M gas services were efficient open and transparent about fixing the air source heat pump. Despite having to go through the original supplier for parts and the frustration and difficulty that brought they remained professional and were able to complete the job. Would happily use them again.
Customer in Hertfordshire Posted on 18/10/2024 , work completed 18/10/2024
A simple job done without fuss
Customer Service
Quality
Value
This was the first time I had called M&M Gas Services. I found them on Which Trusted Traders. We were about to have a new washing machine installed, but after checking the supply connection for the new machine, the installer told me that he could not proceed because there was a problem with an inlet valve as well as a problem with the stopcock under the sink. I was advised to call a plumber. I called M&M and spoke to Martin. We arranged an appointment. He arrived on time and was able to assess the situation quickly. He freed up both the inlet valve and the stopcock without any problem. He completed the job by testing and confirming that everything was operating normally. He told me that there should be no further problem when installing the new washing machine. He was correct. The charges from M&M Gas Services were fair and I was happy to learn that no parts needed replacing. I am now waiting for M&M to do a boiler service. I am confident that this will be carried out in the same efficient way.
Customer in Hertfordshire Posted on 22/09/2024 , work completed 20/08/2024
Boiler Breakdown.
Customer Service
Quality
Value
First time using Martin and the team. Had issues with our boiler across the bank holiday weekend. No hot water, fixed and working on Saturday, broken again Sunday evening. Martin then kindly came out bank holiday Monday at no extra cost and it’s been fine ever since. Would recommend without hesitation.
Customer in Hertfordshire Posted on 02/09/2024 , work completed 24/08/2024
Kitchen refurb
Customer Service
Quality
Value
I have used M & M Gas Services for over 25 years. They are always my first choice. Martin and his team are reliable, competent and trustworthy. Always prompt and if delayed will always let you know. Excellent service.
Customer in Hertfordshire Posted on 08/08/2024 , work completed 05/08/2024
Great Service and On time
Customer Service
Quality
Value
This is the second year running I have used M&M for my annual boiler service. Martin arrived on time and got straight to work, very thorough and completed all OK. have no reservations about using M&M again and thoroughly recommend.
Customer in Hertfordshire Posted on 25/07/2024 , work completed 24/07/2024
Deserves all the 5 star reviews
Customer Service
Quality
Value
Contacted Martin to get two toilets repaired. Great communication throughout and work was completed to a high standard and at a reasonable price. So refreshing to find traders like this who are efficient freindly and above good at what they do.
Customer in Hertfordshire Posted on 07/06/2024 , work completed 06/06/2024
Great service
Customer Service
Quality
Value
Prompt, knowledgeable, and transparent, making the effort to go the extra mile in order to resolve a problem on a Sunday afternoon, highly recommended.
Customer in Central Bedfordshire Posted on 30/10/2023 , work completed 29/10/2023
Boiler Service
Customer Service
Quality
Value
Not knowing the availability of engineers our central heating boiler service was booked some weeks in advance but without any prompting the engineer turned up precisely on time. The service was carried out without any fuss or mess and very quickly. To be recommended.
Customer in Hertfordshire Posted on 24/10/2023 , work completed 10/10/2023
M & M Gas Services Ltd
Customer Service
Quality
Value
I have used Martin for over 30 years now and would never go anywhere else for what is a first rate gold star service. We had a serious pressurised water leak beneath the sink on the wrong side of the stopcock and in a very difficult place to repair. Fortunately he always responds to an emergency quickly so we didn't drown and he and his colleagues are a pleasure to have around whilst they fix things!
Customer in Hertfordshire Posted on 03/10/2023 , work completed 26/09/2023