Boiler Installation in St Albans
New boiler installations across St Albans
Local, Gas Safe registered boiler installation covering St Albans and the surrounding area. Fixed prices, no call-out fee and a one year guarantee.
Information on this page last reviewed October 2026.
New boilers in St Albans, fitted properly
Home Comfort Assured install and replace gas boilers across St Albans. We are Watford based, so we are honest that we are not the closest team to you, but we have done real boiler work in St Albans and we are glad to travel for a job worth doing right.
Fitted properly means the boiler is sized to your home, the system is cleaned before the new unit goes on, the controls are set up so you feel the benefit, and everything is tested and left tidy. If you need a service or a repair rather than a new install, that is covered on our St Albans boiler servicing and repair page, and if the job is radiators, controls or a full system rather than the boiler alone, start with our heating engineer in St Albans page.
Not a new boiler?
Boiler servicing and repair in St Albans
If the boiler needs a service, a fault finding, or a second opinion before you replace it, that is a different job with a different price. It has its own page for St Albans.
What we do
Our services in St Albans
Boiler repairs and servicing
Breakdowns, fault finding, annual servicing and replacement, on every major brand.
Read moreCentral heating
Radiators, valves, controls, power flushing and full system installation.
Read morePlumbing
Leaks and burst pipes, taps, cylinders, bathrooms and appliance installation.
Read moreUnderfloor heating
Design, installation and repair, wet systems in new builds and retrofits.
Read moreViessmann boilers
Why we are accredited, what the range does well, and how it compares.
Read moreSt Albans Boiler Servicing and Repair
Boiler servicing and repair in St Albans. Gas Safe registered, fixed prices and no call-out fee, one year guarantee on our work. Call to book.
Read moreLocal knowledge
Why St Albans customers call us
40.8% built from 1945 to 1982
Across St Albans district, 25,870 of its 63,450 dwellings date from those four decades, on the Valuation Office's 2025 figures. It is a post-war district, not a period one, and that stock is the likeliest to be on its second or third heating system.
8,140 homes from 1955 to 1964
That is the single largest build period in the district, 12.8%, and it is bigger than the 7,290 built in the 1930s. The district figure includes Harpenden and the villages, so it describes the stock and not one street.
Only 13.6% before 1919
Pre-1919 homes number 8,650, and pre-1940 homes 19,040, or 30.0%. Leading with Victorian terraces would describe a minority of the district, so the likelier starting point is mid-twentieth century pipework.
70.9% own their home
In the 2021 Census 70.9% of St Albans district households own, against 61.6% in England and Wales, and 36.0% own with a mortgage, against 28.7%. The person choosing the boiler is usually the person paying for it.
Detached from 4.8% to 41.4%
Among the city's Census areas, named by the House of Commons Library, the detached share runs from 4.8% in Cottonmill and Sopwell to 41.4% in Verulam Park. House size, and the hot water it needs, is the first question in choosing a boiler.
On the ground
Areas we cover in St Albans
We cover AL1, AL2, AL3 and AL4.
Verulam Park
41.4% detached, 14.5% flats and 86.1% heating with mains gas alone, on the Census 2021 figures for the area of that name. Flats here is a derived sum of four categories.
Bernards Heath
40.9% detached, 9.8% flats and 88.6% on mains gas alone, the highest gas share of any St Albans Census area.
Marshalswick
11.8% detached, 24.5% flats and 85.3% on mains gas alone. Marshalswick is published under AL4.
Townsend and New Greens
11.0% detached, 15.3% flats and 85.0% mains gas alone, the Census area of that name.
Cottonmill and Sopwell
4.8% detached and 30.0% flats, the lowest detached share in the district, and among the city's areas the third highest for flats after the centre and Clarence Park.
The boilers we install
We install combi, system and regular boilers, and we fit all the major brands: Worcester Bosch, Vaillant, Ideal, Baxi and ATAG among them. Which one is right for you depends on your water pressure, how many bathrooms you run and how you like your heating to work, and that is what the survey settles.
We are Viessmann accredited engineers, so Viessmann is the brand we most often recommend when a customer asks us to choose, for its efficiency, build quality and the extended warranty route accredited installers can offer. The honest, even-handed comparison lives on our Viessmann boilers page.
A proper job, worth the trip to St Albans
St Albans has plenty of good local installers, so we do not pretend to be round the corner. What we bring is a genuinely careful install: a system designed around your home so it runs efficiently for years, led by Andrew Millward, 40 plus years in the trade and a Heat Geek Elitist. When we take on a St Albans job, we do it properly.
What you get
- A fixed written quote before any work starts, with no call-out fee
- Gas Safe registered engineers (registration 586325)
- Viessmann accredited, and happy to fit any major brand you prefer
- Your old boiler removed, the system cleaned, and the job left clean and tidy
- A one year guarantee on our work and the parts we supply
A boiler replacement in St Albans
A boiler replacement we carried out in St Albans. It is local proof rather than a stock photo, and it is the reason we are happy to quote for St Albans work. You can see more finished jobs in our gallery.
What a new boiler costs
We quote on survey rather than blind. As a rough guide, a straightforward combi replacement in the UK typically falls between £2,000 and £3,500 fitted, while a system boiler with a new cylinder, or a full change of boiler type, usually sits higher. These are typical UK ranges to help you plan, not our price; your fixed quote is confirmed once we have seen the job.
The final figure depends on the boiler you choose, whether the pipework and flue need changing, where the boiler is going, and any controls or upgrades you want.
Related work nearby
Servicing, repairs and second opinions in the same city are on our St Albans boiler servicing and repair page, radiators and controls sit with the heating engineer in St Albans, and the case for the brand we fit most is on the Viessmann boilers page. Nearby we also fit new boilers in Watford and work across Hemel Hempstead.
Need us in St Albans?
Call and speak to the engineer who will do the work, or ask for a quote. No call-out fee, and a one year guarantee on what we do in St Albans.
Step by step
What a new boiler job with us looks like
A clear, no-pressure process from the first call to the day your heating is back on.
Survey and advice
We look at your home and how you use your heating and hot water, then talk you through the sensible options. The right sized boiler runs more efficiently than an oversized one.
A fixed written quote
A clear, fixed price in writing, with no call-out fee and nothing hidden. We only suggest an upgrade if it genuinely earns its place.
A tidy, proper install
A Gas Safe registered engineer fits the boiler, cleans the system, sets up the controls and tests everything, protecting your home as we work.
Aftercare and warranty
We register your manufacturer warranty, hand over the paperwork, and back our own work and parts with a one year guarantee.
Common questions
Do you cover St Albans for boiler installations?
Yes. We install and replace boilers across St Albans and the surrounding area. We have completed real boiler replacement work in St Albans, and we are happy to travel for a job worth doing properly.
Which boilers do you install?
All the major brands, including Worcester Bosch, Vaillant, Ideal, Baxi and ATAG. We are Viessmann accredited and often recommend Viessmann when asked, but we fit whatever suits your home and budget.
How long does a new boiler take?
A straight combi swap is usually a one day job. A full system change or a system boiler with a new cylinder can take two to three days. We give you a realistic timescale with your fixed quote.
Do you also service and repair boilers in St Albans?
Yes. Servicing and repair for St Albans is covered on our dedicated St Albans boiler servicing and repair page, and the same local team handles installs, services and breakdowns.
Boiler brands we install and service
Recent work nearby
See more of our work
What our customers say
See more reviews on TrustATraderElis has done a great job with a variety of plumbing jobs three times for us in St Albans. He has been great and we have always been pleased with his service. He explains what he is doing and why, and makes sure we are happy with it. Definitely recommend.
Elis is very professional, explaining exactly what he is going to do and then carrying it out. Supplied and fitted a replacement bathroom basin tap plus two isolation valves. Reliable and very pleasant. Top plumber and heating engineer.
True heating engineers are hard to find. Andrew is one of the few I have spoken with who is genuinely passionate about the industry, and does everything he can to steer it towards things like low temperature systems and weather compensation. His installation work itself is very tidy.
Meet your engineers
The engineers who turn up
Two engineers, both Gas Safe registered under registration 586325. When you book Home Comfort Assured, this is who does the work.
Andrew Millward
Founder and heating engineer
- 40+ years experience
- Heat Geek Elitist
- Viessmann accredited
Andrew has over 40 years in the trade and specialises in fault finding, boiler and heating repairs, and the design of energy efficient systems like heat pumps and underfloor heating.
Andrew on YouTube
Elis Harizi
Director and plumbing & heating engineer
- Plumbing since 2007
- Heat Geek member
- Gas qualified
Elis trained as a plumber in Greece in 2007, moved to England to gain his gas qualifications, and now designs and installs energy efficient heating as a Heat Geek member.
Got a job that needs sorting?
Call and speak to an engineer, or request a quote. No call-out fee, and we work across Hertfordshire and south Buckinghamshire.