Mark Oliver Plumbing & Heating - Expert Oil Boiler Services & Installations

We recently had a new oil boiler installed at our home in Botley and we couldn’t be happier. Mark was professional, punctual, and very tidy, explaining everything clearly during the installation. The boiler works perfectly, and the follow-up service was excellent. Highly recommend for anyone looking for reliable heating solutions! We would use the services of Mark Oliver Plumbing & Heating again in a heartbeat!

My external oil boiler failed completely at the end of October 2025. I was very lucky to find Mark Oliver who managed to schedule me in and a few weeks later we had a new boiler up and running. He has provided an excellent service at a reasonable cost.

When I found Mark just over a year ago my view/opinion was at an all time low for oil boiler technicians. Having had bad to abominable service for the five previous years. To say nothing of haemorrhaging money! I first called Mark over a year ago to do a service, he was a dedicated Grant technician recommended by Grants. I had never seen such a thorough service carried out. This year I developed a leak. Could not identify where it was coming from. I called Mark, I didn’t have to wait two weeks, he moved his diary around to accomodate. He replaced a valve. Next day strong Kerosene fumes. Mark attended promptly. This went on for several days, including New Year’s Day. Mark attended next day and completely changed, valve, reduced end of copper feed pipe and replaced cable. Success. We still don’t know specifically where the leak was coming from. It’s day three now no more fumes, boiler running well. I thank Mark for his dedication to dealing with this. He didn’t suggest, as previous had, oh you need a new burner, costing £800 installed. For the number of attendances Mark has made to resolve this issue demonstrates to me Mark will be my boiler technician of choice going forward. Not only a good technician, but a very polite, professional, friendly person, a scarcity today. Thankyou Mark.