Barnet · EN5 · Greater London
Get a fixed-price quote for a new boiler online and have a Gas Safe registered engineer fit it at your Barnet home – often as soon as the next day. Replacement gas boilers in Barnet cover combi swaps, system boilers for larger houses, back boiler removals and full heating upgrades, with finance available.
Barnet covers period houses in Hampstead Garden Suburb, Edwardian terraces in Finchley and large homes in Totteridge and Mill Hill. We install Worcester Bosch, Vaillant, Ideal, Baxi and Viessmann boilers across the borough.
Protected streets in the Garden Suburb have strict rules on external changes, so we choose a model and flue position that keeps alterations discreet. Edwardian terraces in Finchley are often a combi conversion, where the Vaillant ecoFIT pure is a quiet option. Large houses in Totteridge usually need a Worcester Bosch or Viessmann system boiler with a cylinder.
In Barnet the type of house drives the price. A flat in Golders Green and a six-bedroom house in Totteridge need very different boilers, and flue routes, cylinder choice, pipework condition and controls all move the final figure. Like-for-like combi swaps start from £1,759 fitted, while Worcester Bosch Greenstar 4000 packages start from around £2,450. The price on your online quote is the price you pay. Anything you choose to add later is agreed with you first.
| Installation type | What’s involved | Price from | Time on site |
|---|---|---|---|
| Like-for-like combi swap | Replace an existing combi in the same position, with new flue, filter and controls | £1,759 | 1 day |
| Conventional or system to combi | Remove tanks and cylinder, cap off pipework, fit combi and upgrade gas supply if needed | £2,350 | 1–2 days |
| Back boiler replacement | Remove back boiler and fire, make good, fit new boiler in a new location | £2,795 | 2+ days |
| System boiler with cylinder | Suited to larger homes with multiple bathrooms; new or replacement unvented cylinder | £2,995 | 1–2 days |
| Boiler relocation | Move the boiler to a loft, garage or new room with new gas, flue and condensate runs | £2,250 | 1–2 days |
These are starting prices for a standard installation by a Gas Safe registered engineer; your online quote confirms the exact cost for your home.
Get a new boiler on finance in Barnet from £23.26 a month. As an example, a £1,799 boiler spread over 10 years at 9.9% APR works out at £23.26 per month. Subject to status, you can pick a shorter term, interest-free finance or buy now, pay later. See our boiler finance options for the full details.
Barnet has some of north London’s biggest houses and some of its oldest. These are the jobs we fit most, and what works for each.
These homes have character to protect. We choose a flue route that is discreet and keep original features intact while upgrading the system.
A system boiler with a cylinder handles multiple bathrooms and big households without a drop in hot water pressure.
Straight combi swaps with new controls often give the biggest saving for the least disruption in these 1930s homes.
Local boiler installers
Barnet is north London’s largest borough by population, stretching from the Finchley Road suburbs through Golders Green and Hendon to Edgware, Mill Hill and the green fields around Totteridge and Monken Hadley. Arts and Crafts houses in Hampstead Garden Suburb sit near Edwardian terraces in Finchley and 1930s semis that make up much of Edgware and Mill Hill.
A lot of Barnet’s houses are large, older or protected, so boiler choice involves more than output. When we price boiler replacement service in Barnet we survey the pipework, look at where the flue can exit and check hot water demand, then give you a fixed price.
With your boiler and date picked online, a Gas Safe registered engineer arrives to remove the old unit, fit and commission the new boiler, register the warranty and notify Building Control, so everything is signed off before they leave the house.
Barnet spans Hampstead Garden Suburb, Finchley’s Edwardian terraces and the green edges of Totteridge, so every job starts with the property. Here is what we see most.
Barnet water is very hard, usually well above 200ppm. We check your postcode and fit a scale reducer with a combi boiler to protect the heat exchanger.
Strict design controls apply across much of the Suburb. We plan flue positions that meet the rules and flag any consent needed at survey.
Terraces often have a boiler in a cramped kitchen cupboard. We fit a compact condensing boiler and tidy up old pipework while we are there.
Big detached homes usually need a system boiler with an unvented cylinder, so several bathrooms get strong pressure at once.
Interwar semis suit a straightforward combi swap in most cases. We check mains flow first, and add a filter and modern controls.
Blocks around Golders Green and Hendon may have lease rules and shared flues. We check the building’s requirements before we recommend a boiler.
Our Gas Safe engineers cover the whole borough, from Chipping Barnet and Finchley to Edgware, Mill Hill and Golders Green. See all our service areas.
Red pin: Barnet town centre. Green pins: nearby towns we cover — tap a pin to see how far each town is from Barnet. The shaded circle shows roughly 8 miles around Barnet.
We also cover London as a whole, plus neighbouring Enfield (about 5 miles), Harrow (about 8 miles) and Brent (about 8 miles).
Often as soon as the next day, depending on the boiler you choose and engineer availability in the EN5 area. Complete the online quote, choose a date that suits you, and if you have no heating or hot water we put your booking first.
All EN5 postcodes plus EN4, N2, N3, N12, N20, NW4, NW7, NW11 and HA8, including Finchley, Edgware, Mill Hill, Hendon and Golders Green, and nearby areas such as Enfield, Harrow and Potters Bar. As part of a nationwide Gas Safe engineer network, we can also help outside these areas.
Barnet tap water is very hard, usually above 200ppm. You can check your postcode on your supplier’s hardness checker. Where it is over 200ppm, we fit a scale reducer with a combi boiler, in line with Building Regulations guidance.
Yes. If you have a back boiler, we take out the unit and the fireplace it’s built into and cap off the old flue and pipes safely. The new combi or system condensing boiler is then placed in the most suitable spot. Expect it to run longer than a simple swap. We’ll agree the schedule with you up front.
A boiler replacement is notifiable under Building Regulations, and your Gas Safe registered engineer notifies Building Control, so you receive a compliance certificate. Planning permission is not normally needed for a like-for-like swap, but Hampstead Garden Suburb has strict controls over external changes, so check with Barnet Council before changing a visible flue.
Yes. Boiler finance in Barnet includes interest-free, 9.9% APR and buy now, pay later options, with deposits from £0 – see our boiler finance page. All finance is subject to status.
Yes. The engineer disconnects the old boiler, removes it and disposes of it responsibly, together with unneeded tanks or cylinders when you switch to a combi.
All boilers we install come with a manufacturer-backed warranty, typically between 5 and 10+ years depending on the model. Keeping it valid usually means an annual service – our boiler cover plans take care of that for you.
Yes. We also replace oil and LPG boilers for properties that aren’t on the gas grid. An OFTEC registered engineer fits your oil boiler, while an LPG boiler is fitted by Gas Safe registered LPG-competent staff. See our oil boiler installation and replacement and LPG boiler installation and replacement pages for more detail.
Tell us about your home, see fixed-price replacement boiler packages for Barnet and book the installation date that suits you – all online, in a few minutes.