How much does it cost to move a boiler?
Moving a boiler usually costs between £400 and £2,000, and more for a complicated move such as a new vertical flue through the roof. A short move along the same wall sits at the bottom of that range, while a move to another floor, with long new pipe runs and floorboards lifted, sits at the top.
Published figures broadly agree. MyBuilder's price guide gives £400 to £600 for a move within the same room, £600 to £1,000 to an adjacent room and £1,000 to £1,500 to a different floor, with complex moves up to about £2,500. EDF's guide puts a general relocation at around £1,000 to £1,400, with short moves usually under £1,000, and Checkatrade's new boiler cost guide gives about £1,000 in labour for moving a boiler.
| Type of move | Typical UK cost | Typical time |
|---|---|---|
| Same room, short distance | £400 to £1,000 | 1 day |
| To an adjacent room | £600 to £1,500 | 1 to 2 days |
| To a different floor | £1,000 to £2,000 or more | 1 to 2 days |
| Into the loft | £1,000 to £2,000 or more, plus any ladder, boarding and lighting | About 2 days |
| Moved as part of a new boiler installation | Priced as an extra on the installation quote | Adds around half a day to a day |
These are typical ranges and vary by region, with London and the South East at the higher end. They usually cover the gas and plumbing work but not replastering, decorating or new kitchen units, so check what making good is included.
What drives the cost of moving a boiler
The cost is driven by the four things that connect a boiler to the house: the flue, the condensate pipe, the gas supply and the heating and water pipes. The further each has to travel, and the more walls and floors it crosses, the higher the price.
Flue routing
A boiler moved to a new position needs a new flue route to the outside, and the terminal must meet the clearance rules from windows, doors, eaves and boundaries. Each model has a maximum flue length, and every bend counts as extra length. A flue straight through an outside wall is cheapest; a vertical flue through the roof, or one that needs scaffolding on a high wall, costs more. Our boiler flue guide sets out the distances.
Condensate routing
A condensing boiler needs its condensate pipe to fall steadily to a drain, ideally inside the house. If the new position has no drain nearby, the installer may need a long internal run or a condensate pump. The rules are covered in our condensate pipe guide.
Gas pipe sizing
The gas pipe from the meter to the boiler must be large enough to deliver the full gas rate. British Standard BS 6891 limits the pressure loss between the meter outlet and the boiler to 1 mbar, and the loss doubles when the pipe length doubles. Moving a combi further from the meter often means replacing the whole run with larger pipe rather than extending the old one, which adds materials, labour and holes through walls or floors.
Heating and water pipes
The heating flow and return have to be extended, and on a combi the cold mains feed and hot water outlet too. On a system or regular boiler, the pipes to the cylinder also move. Running pipes under floors or boxing them in along walls adds time.
Electrics and making good
The boiler needs a fused spur near its new position, and any wired thermostat or controls must be reconnected. The old flue hole has to be filled and weatherproofed, and walls may need replastering where pipes were removed.
Can you move a boiler to another room?
Yes, a boiler can be moved to another room as long as the new position allows a compliant flue route, a condensate drain, enough space for servicing and safe access. Some rooms come with extra rules.
| New location | Allowed? | Points to check |
|---|---|---|
| Kitchen or utility room | Yes, the most common choice | Flue clearances; cupboard gaps if boxed in |
| Airing cupboard | Yes, often after a switch to a combi | Servicing space and access to the pipes underneath |
| Bathroom or shower room | Only a room-sealed boiler | Gas Safety (Installation and Use) Regulations 1998, regulation 30; electrical zones under BS 7671 |
| Bedroom | Yes if room sealed | Regulation 30 requires room-sealed appliances over 14 kW in sleeping rooms; noise |
| Loft | Yes, with conditions | Fixed ladder, lighting, boarded route, frost protection, access to top up pressure |
| Garage | Yes, with conditions | Frost protection for pipes and condensate; protection from vehicles |
Almost every modern gas boiler is room sealed, so bathrooms and bedrooms are possible, though a boiler in a bedroom can be noisy at night. The space needed around the boiler is covered in our boiler cupboard guide, and your model's installation manual has the exact figures.
Before choosing a spot, think about the next 10 years of servicing and topping up. A boiler squeezed into a tight corner or a loft with no proper ladder makes every visit slower and dearer.
Do you need building regs to move a boiler?
Yes. Moving a boiler means disconnecting it and installing it again in a new place, and installing a gas boiler is notifiable work under the Building Regulations in England and Wales. You do not have to contact building control yourself: a Gas Safe registered engineer self-certifies the work and notifies it through Gas Safe Register within 30 days, and you then receive a Building Regulations Compliance Certificate.
The work must also meet the Gas Safety (Installation and Use) Regulations 1998 and the manufacturer's installation instructions, including flue position, ventilation where needed and clearances.
Planning permission is not usually needed to move a boiler inside a house. A new flue on a listed building, or on a prominent wall in a conservation area, may need consent, so check with your local planning authority first. If you live in a leasehold flat, you will usually need the freeholder's permission to cut a new flue hole in an outside wall, and tenants need the landlord's agreement.
Moving a boiler involves gas work, which only a Gas Safe registered engineer can legally carry out. New electrical circuits should be done by a qualified electrician. Never disconnect or move any part of a boiler, flue or gas pipe yourself.
Is it worth moving the boiler when you replace it?
If your boiler is due for replacement, moving it at the same time is usually the cheapest way to do it. The old boiler is coming off the wall anyway, a new flue kit is fitted either way, and the installer can plan the gas and pipe runs once. The move is then an extra on the installation price rather than a separate job.
Moving an old boiler on its own is harder to justify. If it is over ten years old, you could pay to move it and then pay again to replace it a few years later. Flue parts for older models can also be hard to get. Our guide to how long a boiler lasts can help you judge how much life yours has left, and new boiler costs covers the replacement side.
What to do next
Decide on the new position and check it has an outside wall or roof for the flue, a drain for the condensate and room for servicing. Then get two or three quotes from Gas Safe registered engineers, each itemising the flue, gas pipe, heating pipes, condensate route, electrics and making good. If you are replacing the boiler too, ask for the move to be priced within the installation, and see our guide to how long it takes to fit a new boiler for the timescales.