Professional, from start to job done. And price is transparent. Highly recommended. I will use their service again.

Quick response, punctual, efficient and analytical, picked up obscure issue very quickly, problem dealt with followed up some sound advice and help going forward. Great all round service

Faultless in every aspect. 5 stars for everything, would recommend to anyone

Quick and efficient. Very friendly as well.

Excellent service and good professional job. Tomasz is a credit to your business

Excellent communications and the work was carried out very efficiently and in a friendly manner. Good use of technology for booking an appointment and for payment.

Grand Union replaced an aging boiler and 3 x radiators at my house. The service was excellent throughout. Both Andy and Mitch were really helpful, tidy in their work and conscientious to get the job completed despite an "interesting" technical issue identified late on a Friday evening. I would recommend without any reservations.

Very delighted with the fast response to the work I needed in by bathroom, and I’m happy with the isolation of the shower. He was very professional and tidied up after himself, I would recommend him to anyone who needs work done.

Called last minute and so grateful got the job booked in. Tomasz was great fast professional tidy very helpful and a pleasure thanks all really pleased

Once again fabulous service from Grand Union. Mitch is so professional and did a great job installing a new radiator for us. The communication is really outstanding and the morning text confirming the booking then another when they are on the way is really welcome.