01387 268 868 (Dumfries)
01556 503 150 (Castle Douglas)


We offer a number of services in relation to the installation of gas appliances including Full Gas Heating Systems.

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boiler installation and servicing

Boiler Installation

At Derek Mitchell Group, we offer a number of services in relation to the installation of gas appliances.

Derek Mitchell Group can install a range of gas boilers and we are trained to work on oil boilers up to 400KW (unlimited).



"It was imperative we had the work carried out immediately and within 30 hours of our problem being diagnosed we had a new boiler fitted. That was far beyond our expectations. Throughout the process we were kept well informed and every aspect of the process was thoroughly explained. All members of staff, without fail were courteous and helpful through the process. The product itself is excellent and the price was also competitive. Special thanks to Laurie Irving the very best member of staff from a Company we will be using again and would thoroughly recommend."

New Boiler

"I received a quote for a new boiler and chose to go with Derek Mitchell.

Arrangements were made for the work to commence and the installation engineer arrived on time and fully equipped to carry out the work.

He was very professional and efficient in carrying out the work and was able to get the gas supply reconnected in a very short time to allow use of other gas appliances.

During the course of the work, I asked if it would be possible to make some alterations to the piping arrangement to allow zonal control and this was done without any complaints or issues.

All in all, I am very happy with the company and the way in which they carry out their services. This will be my first choice for any future gas or electric work that I might require."

Removal of old boiler and installation of new

These include the following:

  • Full Gas Heating Systems
  • Gas Boilers

  • Gas Fires and Cookers

Gas Heating

Full Gas Heating Systems Installations.

Specialising in the installation of full natural gas heating systems, from the boiler to the pipework, and radiators to valves, we take care of everything for you. 

Our engineer will meet with you at your home to discuss what you are looking for, and from there we can provide our recommendations on which products suit your needs and budget before providing a no obligation estimate of cost for the installation of your heating system. 

Use the contact form on this page to contact us and arrange an appointment.

Gas Boilers

With the latest gas boilers running more efficiently than ever, it is a popular option to upgrade your old boiler and avoid changing the entire central heating system.

We highly recommend a central heating health check to make sure your radiators are in excellent working order, and to ensure that a new boiler is the best option to keep your central heating running at its best. 

Contact us for more information or to organise an appointment with a gas engineer to discuss your requirements and receive a no obligation estimate.


Gas Fires and Cookers

All new gas fires and cookers need to be installed by a Gas Safe registered engineer.

Our engineers are all Gas Safe registered and fully qualified to fit gas stoves, all styles of gas fires, hobs, freestanding cookers and range cookers.

Before we install your new appliance, we make sure that all existing connections are safe and up to the current standard, and if they are not we will discuss what options are available before carrying out further work.  We will also disconnect your old appliance to make sure it is done safely.

Once your new gas appliance is installed we will provide you with the Gas Safe certification. The certification is extremely important as it could invalidate a household insurance if you have a new appliance installed without it.




Installation Projects

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Gracefield Arts Centre - Dumfries

Supply & installation of a new oil boiler and chemical flushing of the existing heating system pipe work.

Westlands Country Park - Annan

Full design & build of electrical and mechanical services for Westland's Country Park.

Lloyd Limited - Carlisle

Mechanical and electrical installation on workshop extension for Lloyd Limited.


Our people make us who we are

Derek Mitchell Group is a large, multi division contractor based in Dumfries & Galloway and working across the UK.

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