Welcome to Marshall McGeever LTD

We are a team of highly experienced, fully qualified plumbing engineers covering Hertfordshire, Middlesex and the surrounding areas. Specialising in all aspects of Plumbing, Heating, Gas and Drainage in Hertfordshire, we can take care of any issue that may arise quickly and effectively. All of our engineers are Gas Safe registered and fully insured, so you can rest assured you are in the capable hands of industry professionals. If you have an issue with your drainage or plumbing in Hertfordshire, we are your local experts with the knowledge, experience and equipment to provide the most efficient and cost-effective solution possible.

We are available 24/7 365 days a year and no job is too big or small. We can provide free estimates for both residential and commercial customers. We are Checkatrade registered and approved Vailant installers.

Our fully comprehensive plumbing service means we cover all aspects; including blocked drains, boiler repairs, central heating, gas repairs, bathroom installations and much more. Our services are available throughout Hertfordshire and Middlesex, including areas such as Harrow, Watford and Ruislip.

To speak to one of our plumbing experts call 0208 950 4440 or Email operations@marshallmcgeever.com


All of our highly skilled plumbers in Hertfordshire are Gas Safe registered and provide an expert, professional plumbing service 365 days a year. We are on hand to deal with any plumbing issue that may occur, from blocked sinks and toilets, to emergency boiler repairs. We specialise in providing a prompt, reliable service that resolves your issue with the quickest, most cost-effective solution possible.


At Marshall McGeever we are proud of our dedicated team of fully qualified gas engineers. Specialising in boiler repairs and installations, we cover the whole of Hertfordshire, Middlesex and North London, providing solutions to any of your heating problems. If you have an issue with your central heating one of our professional gas engineers are on hand to offer you their expertise.


Dealing with gas or any gas related issue poses real danger to our safety. It’s therefore vitally important that you use professional, Gas Safe registered engineers to effectively deal with any problems with your gas. If you can smell gas, or suspect a leak, then our emergency gas service is available 24/7 365 days a year. Our gas engineers cover Hertfordshire, Middlesex and all surrounding areas with a fast, reliable and specialist gas service.


Our drainage engineers provide a cost effective solution for any drain related issue. Blocked Drains, CCTV Drain Surveys, Drain Lining, Drain Maintenance, all of our engineers are highly experience and have the expertise necessary to clear your drains and restore them back to their full free flowing capacity in no time. Using the latest water jetting and CCTV drain camera technology, we have the resources and knowledge to repair your drains using the most cost effective and time efficient methods available.

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All of our engineers are Gas Safe registered, fully insured and highly experienced. You’re in the hands of professionals with the qualifications and expertise to successfully take care of any issues with your plumbing, heating or drainage in Hertfordshire



There’s no job too big or small, and we are always happy to provide you with a free quote before works are carried out. Our estimates carry no obligation and can be provided to both residential and commercial customers

low price


We keep our rates competitive and deal with every issue in the most cost-effective way possible for the customer. Our experience and knowledge allow us to solve most issues quicker than our competitors saving us time and you money



We are available 24/7 365 days of the year to take care of all your plumbing and heating needs. For emergency issues such as gas leaks or blocked drains in Hertfordshire we are ready and willing to help

For more information or to speak to one of our plumbing experts 

Call 0208 950 4440 OR Email operations@marshallmcgeever.com

Our Services



Marshall McGeever LTD specialise in providing an unbeatable service for plumbing in Hertfordshire and the surrounding areas. All of our plumbing engineers are highly experienced and fully qualified.



When things go wrong with your central heating in Hertfordshire it’s important to remember your local heating experts at Marshall McGeever are available 24/7. 



At Marshall McGeever we specialise in providing expert gas solutions to both domestic and commercial clients. If you are looking for a fully qualified, highly skilled gas engineer in Hertfordshire, then look no further.



Our dedicated drainage division has a team of very experienced and highly skilled drain engineers, ready to clear your sewers or drainage in Hertfordshire. 

Latest News


Marshall McGeever are delighted to have been part of a joint operation with other local contractors in arranging for a makeover of the lounge of a local care home at Watford Mencap.

We donated our services to provide new Low Surface Temperature Radiators (LST) in the new look lounge, which has also now included a complete change all radiators with LST’s throughout the care home.

It has been a privilege to be able to help and work alongside such a worthy cause!

Please refer to link below for more details:


Check out our latest offers…

drainage watford
drainage hertfordshire

Valiant Approved installers with extended warranty

No job too big or small

Free Estimates 24/7 365 days a year



  • Many thanks for your excellent service. Steve arrived early in the allotted time slot and was very efficient and helpful and fortunately the problem was easier than I had anticipated. Office staff equally helpful. I would certainly use your company again for any drainage problems.

    A G Mitchell
  • I met Mr McGeever, the owner of Marshall McGeever Ltd, over 8 years ago. I have moved employment 3 times since then and have continued to use Marshall McGeever in each of my property related positions for all plumbing and heating requirements. Amongst other things, the reason for this being their efficiency, responsiveness and competitive pricing. I would have no hesitation in recommending Marshall McGeever Ltd for anyone’s plumbing and heating requirements. Alex Smith, Operations Manager, WS (Construction & Development) Group Ltd.

    Alex from WS Maintenance
  • Very good tradesmen and keen to assist with all problems. Strongly recommend this business for future works.

    Watford FC Community Sports & Education Trust, Harrow
  • MML is fab, very reliable and polite

    Danielle from Frost's Estate Agents
  • Great workmanship, reliable.

    Mrs. Karen Peterman, Bushey
  • Nick has done a good job so far

    Ms Kwan, Watford
  • Fixed leak and offered advice and support on other plumbing issues. Willing to go the extra mile to ensure customer satisfaction.

    Mr Joseph Arthur, Bushey
  • Would recommend without hesitation, turned up and got on with job, kept me informed at all times and helped me deal with our insurance company who were initially very difficult to deal with.

    Mr R Robinson, Bushey
  • We would highly recommend Marshall McGeever who we have worked with them for many years and have always to be professional, reliable and trustworthy. Their quality of work is carried out to a very high standard and they are very knowledgeable and, take pride in what they do. As an agents we rely on our contractors for a speedy service and Marshall McGeever always oblige and prioritise work for us, they have even gone the extra mile to help us out when no other contractors are available. We have always found the contractors very friendly and approachable and they are always our first point of contact.

    John Whiteman
  • Marshall McGeever are reliable, trustworthy and are always on hand as and when I need assistance. I would highly recommend them

    Katrina from Imagine Property Management
  • I would highly recommend Marshall McGeever Plumbing and Heating, they are an extremely efficient and competent company.  From the first point of contact I feel very confident that they have the matter in hand and that the issue with be dealt with very efficiently. Feedback is always provided and the timescale that they attend and deal with the matters is within a very reasonable time.  

    Kerry from Watford
  • I have known Alan many years. He has always acted in a professional and reliable manner. Any problems have been dealt with  promptly and efficiently.

    Laura from Watford
  • Very good service and very helpful staff. The parts for my taps were difficult to find but they found a good alternative for me.

    Mrs Danielle Brummell, Bushey
  • Very reliable punctual and first class job. Received other quotes stating required new boiler, however it was fixed by them at a fifth of the price.

    Mr Philpott, Wigginton
  • On time, friendly and left us with 2 fan heaters to use when our old boiler packed in. I've also used previously to check out a pump-it turned out no work was needed but no call out fee was charged at all for this, which was most welcome. Unlike some contractors, they have always answered the phone immediately or responded to a message really quickly. Will definitely use again.

    Miss Katherine Coleman, Watford
  • Cannot fault this company and cannot praise them enough! It is so nice to know a fair and reliable company! Would and have recommended these guys!

    Miss Jessica Phillips, Ruislip
  • Thank you for your quick response and dealing with my plumbing problems efficiantly, it was a great help. Once again, thank you.

    Mr A Batchelor
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