Castle Heating Herts

Hello and and welcome to Castle Heating Herts! Castle Heating is a reputable and highly qualified company carrying out all types of heating, gas and plumbing work to domestic and small commercial clients in and around Hertfordshire, Bedfordshire and Kent.

Castle Heating Herts was set up by myself, Karl Rayner. I first became a heating and plumbing engineer after I finished serving in the RAF. Since 2010, we have grown from strength to strength and presently have a full team of fully qualified engineers and installers experienced in all aspects of heating, gas and plumbing with over 30 years of experience in the industry.

Furthermore, we have had our business checked and vetted by Checkatrade. In fact, we are the longest serving member of Checkatrade in Welwyn Garden City and started our partnership when they first started in this area in 2011. To learn more and read some of our reviews, please check out our Checkatrade profile here.

We take pride in having built our business on word of mouth and recommendation. But you don't need to just take our word for it, please check out some of our Reviews.

Comprehensive range of heating, gas & plumbing services

Whatever your heating, gas and plumbing requirements might be, we have you covered. Among the services we provide full heating installations through to boiler servicing. 

We are committed to a high standard of workmanship and professionalism without breaking the bank. Our pricing is fair and cost effective, furthermore we carry out all works in an energy efficient manner, saving you further money in the long run.

We are approved with some of the UK's leading boiler manufacturers including Valliant, Viessmann, Baxi and Potterton. This means that we are able to offer our customers warranties between 5-10 years on select boilers we install. 

Please contact us for more information or to arrange a free, no obligation quote.

Company image

Based in Welwyn Garden City

Offering our heating, gas and plumbing services throughout the surrounding area of Hertfordshire, Bedfordshire and Kent.

Heating, gas & plumbing specialists

Among the services we cover include boiler installation, central heating installation, boiler servicing and repair, heating conversions, heating controls, unvented hot water and plumbing.

Excellent Service

We take pride in the level of service we provide to our customers. We strive to be reliable, timely and great value for money every single time.

Castle Heating Herts


Years of experience


Safe registered


Company founded



Karl Rayner

Karl Rayner

I first became a heating and plumbing engineer when I finished servicing in the RAF. I am Gas Safe registered, just like the rest of my team, and take great pride in the work we do. 

Click below to get yourself a quote