
Gas central heating & plumbing specialists in London and Hertfordshire
Our mission is to help our customers as quickly and efficiently as possible — working to a high standard, with the minimum of mess, and providing a friendly and comprehensive service.
24hr emergency line: 07831 5544881992
Established
1,000+
Customers
Under 10
Staff, a personal service
24hr
Emergency line
Gas Safe
Registered engineers
Gas Safe registered
Qualified engineers for all gas work
24hr emergency line
Call 07831 554488Big enough to cope
Small enough to care
Accredited and approved
Gas Safe registered
APHC licensed member
Worcester Bosch Accredited Installer
Vaillant Approved Service AgentViessmann Approved Installer
- Honeywell Installer NetworkHoneywell Installer Network Recognised Installer
OUR SERVICES
We handle all aspects of central heating and domestic plumbing
Whether it's a leaky tap or a complete renovation, no job is too big or too small.
BoilersBoiler repair and servicing
Boiler fault diagnosis, repairs and regular servicing.
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InstallationBoiler installation
New boilers fitted neatly, with the minimum of mess.
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HeatingCentral heating repairs
Getting your central heating working properly again.
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Gas safetyGas safety checks
Gas safety checks and landlords' gas safety certificates.
Find out moreWe also help with

ABOUT ALLSERVE
Welcome to Allserve Heating & Plumbing
Allserve Heating & Plumbing are gas central heating specialists, providing gas, central heating, plumbing and other services across London and Hertfordshire.
Allserve Heating & Plumbing (AHP) was founded in 1992 as a professional gas engineering service. We have grown substantially since then and, with over 1,000 satisfied customers, we have expanded our services to keep up with the times. We are known for our professionalism, competitive prices, tidiness and efficiency.
- Tidy, efficient work with the minimum of mess
- Transparent prices, agreed before work starts
- Much of our work comes from word-of-mouth recommendation
HOW WE WORK
Simple from start to finish
Tell us what you need
Call the office on 01923 254173, WhatsApp us or send an enquiry.
We'll assess and agree the price
A full breakdown of costs, agreed with you before any work starts.
Job done, home left as we found it
Tidy, efficient work with the minimum of mess.
WHY ALLSERVE
Big enough to cope, small enough to care
Because we are a small company with under 10 employees, we can offer outstanding service and a personal touch to every customer we visit. We also have a large pool of resources to draw on, so we can handle any project, from domestic plumbing to complete renovations. We work as a contractor within the services industry too, with an excellent track record of taking projects from start to finish.
- Emergency callouts
- Boiler fault diagnosis
- Boiler installation
- Boiler servicing
- Landlords gas safety certificates
- Bathroom installation
- Toilet repairs
- Renovations
- Site contracting
- Underfloor heating
AREAS WE COVER
Local to London and Hertfordshire
Based on Bushey Mill Lane, Bushey.
- London
- Watford
- Bushey
- Hertfordshire
TESTIMONIALS
What our customers say
“I had the good fortune to be introduced to Silas at Allserve Heating and Plumbing (AHP) by a friend who has worked with him for many years, and they have been taking care of my heating and plumbing ever since. The guys at AHP are punctual and reliable, which is not easy to find these days.”
“Hi Silas. I just wanted to let you know that John and Ettan have just left our house and I have paid them as agreed. Emma and I were very impressed with them – both very polite and pleasant to have in the house, and we would highly recommend you to anyone.”
“How can we thank you enough? You are an honourable person with valuable business ethics. The installation was carried out with total care and consideration on all fronts, and we are so delighted that your company was able to do the work. It looks like you were never here!”
“Dear Graham & Silas, thank you both for all your hard work and precious advice in putting in the new system for us. We hope we may use your help again in future.”
“Silas, thanks so much for doing it – and so quickly.”
“To all at Allserve Plumbing, many thanks indeed for your help over the years. It would be good to get in touch when we move into our new house next year.”
KNOWLEDGE BASE
Answers to common heating & plumbing questions
GET IN TOUCH
Choose Allserve for any job, big or small.
Gas Safe registered engineers covering London and Hertfordshire, with a 24hr emergency line.









