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Why Choose Grand Union?

  • Local, convenient & affordable

  • John Lewis & British Gas approved engineers

  • Quality service backed up by our online reviews

  • Free estimates, no call out charge

  • All work insured and guaranteed for a minimum of 1 year

  • All prices are fixed – no surprises!

Learn more about us


We will happily beat any written quote supplied by a competitor or business.

Emergency Callouts

We offer a call-out & breakdown service to customers who have a plumbing/heating emergency.

John Lewis Home Solutions Approved

We are a John Lewis Home Solutions approved company. All of our work that is carried out is fully guaranteed by us and insured.

Call Out/Breakdown, plumbing & heating specialists

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Plumber Milton Keynes

Gas Safe Engineers Milton Keynes

At Grand Union Plumbing & Heating, all of our engineers are experienced and qualified to carry out all of the services we provide. This means we are able to help, regardless of how large or small the job. Grand Union Plumbing & Heating’s engineers are Gas Safe certified, we ensure work is always completed safely and to a high standard. If you are looking for a professional plumbing company within the Milton Keynes area for anything from boiler installations to fixing a tap, or would like some friendly advice please give us a call.

Heating & Plumbing Engineers

Here at Grand Union Plumbing & Heating, we take pride in being able to provide a wide range of heating and plumbing services. We offer boiler installation, boiler servicing, plumbing services, breakdowns, emergency call outs and more. We’re even on hand to help with landlord safety certificates and power flushing. Whatever heating or plumbing service you need, Grand Union Plumbing & Heating is here to help.

Emergency Call Out

If you find yourself with an unexpected plumbing or heating problem and you need it fixing quickly, contact Grand Union Plumbing & Heating to arrange an emergency call out.

See areas we cover


Use our calendar appointment request form and we will confirm back to you as soon as we can! We look forward to hearing from you.

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Areas we cover

  • Aylesbury
  • Bedford
  • Leighton Buzzard
  • Northampton
  • Olney
  • Towcester
  • Woburn Sands
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Broken boiler? For any breakdowns or emergency call-outs, please call 01908 034194 or press the button below.

Request emergency appointment

Some of our services

If you are looking for a professional heating engineer within the Milton Keynes area for anything from boiler installations to fixing a tap, or would like some friendly advice please give us a call.

  • Unvented Hot Water Cylinders
  • Toilet Repairs
  • Tap Replacements
  • Radiator Replacements

What Our Customers Say

It’s not very often that you find a quality tradesperson who is reliable, honest, and competitive on his pricing. Mitch has done a number of jobs in our house, including installing a new boiler, water tank and radiators. All to a brilliant standard. I will happily recommend Mitch and Grand Union Plumbing!


Very happy with the service I have received, the service was prompt, efficient and professional. Yes, I would use again.

Clare Price

Amazing work and attention to detail and Mitch is a great person to work with

Made in Sud Pizzeria

Very friendly service. On-time and very professional. Also very careful about safety during the current COVID outbreak.

Andrew Robinson

Mitch is super friendly and professional, happy to give advice and he’s done loads of work for me.

G Man

Highly recommended, would use again

Mandi Willett

Highly recommend Mitch. Polite, professional, on time. Great service.

Susan B

Mitch replaced our boiler and ran new pipework, plus relocated some radiators. He did a brilliant job and I wouldn’t hesitate to recommend him! He was punctual, helpful and polite.

Suzanne Simmons

I had a new bathroom fitted by Mitch. He was absolutely excellent. He was polite, tidy and did an exceptional job. Reasonably priced too. 100% recommend.


Excellent service. I contacted them for a boiler repair. They responded within hours with prices. Once they confirmed part availability, they fitted within days.  Very efficient, great service and I liked their clear pricing.

Definitely recommend & I will be booking my annual service with them in future.

Well done!

Sheena Mac

Grand Union replaced our central heating system and in doing so we requested that it be relocated from the airing cupboard into the Garage.  The work was completed professionally & on time with the relocated pipework like a work of art, very neat and orderly.  I would have no issue with recommending Grand Union, and will certainly be using them for all our gas & plumbing needs.


I have called Mitch out twice since moving into our new house a month ago. Both times he has managed to fit in an appointment fairly quickly to resolve our issues. He has been professional and friendly, offering advice on other issues that I have seen. I would definitely recommend his services.

Simon Edwards

We have used Grand Union Plumbing several times as we had a really tricky fault. We found Mitch to be really excellent. Very happy to recommend, 10/10

Annette McDade

Called Mitch out on very short notice, extremely reliable and great rates, would highly recommend Grand Union Plumbing and Heating. Also provided advice with other queries aside from the job at hand- with no reluctance. Great service, thank you for your hard work and honesty Mitch.

Dushan Gnanakumar
Great service, polite, attention to detail. Would highly recommend.
Ajvinder Dhatt
Had a leak that needed fixing asap and Mitch gave me advice over the phone to deal with it until he could get to me, then came out within the hour on a weekend! Would highly recommend
Hannah Manners
Great company would highly recommend for any heating & plumbing issues
Terry Adolpho

Definitely recommend these guys. Had a job done by them and they wasted no time to get it done and made sure I was completely happy before any payments. Nowadays companies just want to rush and take your money. Big thumps up

Tevaugh Grant
We always use Grand Union for serving and any other unforseen problems. The service and professionalism is 1st class. Would definitely recommend!!
Stephanie Horne
A great company to do business with… I used them recently for an emergency with a domestic heating system which was rectified very efficiently. A second problem (some months later) and there was no decision to make, called them and they sorted it in no time with minimum fuss, mess and very reasonably priced.
Trevor Gordon

Have used Grand Union twice now. They are very quick to respond to enquiries, reasonably priced, tidy workers and very friendly. I can’t fault them. Definitely my go to guys now for any plumbing needs.
Highly recommended

Emma Verrall
Great service from Mitch. Have used a few times for boiler service, repairs and outdoor tap installation. Always very prompt service, turns up on time and reasonable prices. Would definitely recommend!
Jon Hood

I found Grand Union Plumbing through the Gas Safe Register. I had a boiler service and gas safety certificate. Mitchell was very professional and the prices were very reasonable. I would definitely recommend and use again.

Rebecca Hughes
Mitch was very helpful when fitting my new boiler – he was very fair about price and I couldn’t recommend Mitch enough. Thanks Mitch!
Reece Hussain

Boiler Servicing

It is recommended that your boiler is serviced at least once a year to ensure it’s operating safely and efficiently. Most manufacturers require an annual service on new boiler installations to validate the warranty. A boiler that hasn’t been serviced could be costing you money on energy if it is not operating correctly, more importantly, your boiler could be leaking poisonous gasses leading to unsafe operation. Getting your boiler serviced by a gas safe registered engineer will ensure your boiler is running correctly.

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Grand Union Plumbing & Heating Ltd
Based on 19 reviews
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Kaycee Taylor
Kaycee Taylor
Mitch is absolutely brilliant. We completely trust him in our home, our dogs are really happy around him and he is... really polite and personable. He comes when he says he will, explains clearly what the problem is, does a great job and we have every confidence in his work. We highly recommend Grand Unionread more
Siggy Martin
Siggy Martin
From quoting to fitting our new boiler recently, Mitch at Grand Union Plumbing was great to work with. He did... everything he said he would and communicated with us every step of the way either in writing or verbally. It’s so refreshing to work with someone like him and we would definitely use the company again and recommend them to anyone in need of their more
Nigel Cox
Nigel Cox
Great service, Mitch is polite, professional and prompt and reasonable priced, i have used Grand Union for 3 different... jobs now and i will continue to use more
Gabriel Daniel Cabrera
Gabriel Daniel Cabrera
Mitch did an amazing job at plumbing my hair basin in from the bathroom to the mini salon, just in time. Very polite... and friendly. Highly recommended. Will use a again for anything to do with my house plumbing. Perfect job ⭐️ ⭐️ ⭐️ ⭐️ ⭐️ ⭐️read more
Wendy Angela
Wendy Angela
I found Mitchell through the British Gas hero’s website, I have boiler cover with another company and was in dispute... with what this company were saying the problem was and refusing to repair,Mitch came round the next day and confirmed the issue wrote me a report. The company then admitted liability.we asked for Mitchell to return and replace part as we did not trust the other company Mitch booked us in the next day replaced and all working perfectly.would highly recommend Grand union plumbing and heating to all my friends and family punctual polite and knowledgable great 5 star service will definitely use again thanks for all your help more
Lynn Moffatt
Lynn Moffatt
very happy with the service turned up when he said he would and serviced the boiler for us nice polite man and good... clean job will use again and good price for the job lynnread more
Siobhan McConnell
Siobhan McConnell
Great service, professional friendly efficient and tidy, will definitely use again, have recommended to family and... friendsread more
David Went
David Went
Polite, friendly and punctual. I will be using Grand Union Plumbing again and would certainly recommend their services.
Lou Baxter
Lou Baxter
highly recommended, on time efficient and polite. 5* service and reasonably priced
Simon Edwards
Simon Edwards
I have called Mitch out twice since moving in to our new house a month ago. Both times he has managed to fit in an... appointment fairly quickly to resolve our issues. He has been professional and friendly, offering advice on other issues that I have seen. I would definitely recommend his more
Paulo Botrugno
Paulo Botrugno
I found them very professional , accurate, on time, clear instructions to works done.Highly recommended.
Suzanne Peachy Simmons
Suzanne Peachy Simmons
Mitch recently replaced our boiler, ran new pipework and relocated some radiators. He was always on time, was really... conscientious and I would always recommend more
Rebecca Hughes
Rebecca Hughes
I found Mitchell through the Gas Safe Register and he did a boiler service and gas safety certificate for me. Would... highly recommend and will use again. Great more
Jo Allen
Jo Allen
I found grand union very professional and helpful and would thoroughly recommend them.
Linda Cassidy Gordon
Linda Cassidy Gordon
Exceptionally reliable, trust worthy and competitive - changed our boiler and refitted our water cylinder - fantastic... job, thx more
Paul Moore
Paul Moore
Always provide a great service, highly professional, great comms and competitive rates.
Bradley Smith
Bradley Smith
Amazing service!! Very professional and reliable
Simon Greenhalgh
Simon Greenhalgh
They always on time and professional job. Thanks
Sean Mcmanus
Sean Mcmanus
Highly recommend, very professional 👍🏻
George Martell
George Martell
Use Grand Union for all my plumbing and heating issues. 10/10 👍
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If you have any questions regarding our services, would like to arrange a quotation or would like to book a call out please contact us using the form below. You can also request an appointment through our contact form. We look forward to hearing from you!