Is Underfloor Heating Worth it in a Bathroom Renovation ?
If you’re planning a bathroom renovation, underfloor heating is one of the upgrades most homeowners ask me about. It has become increasingly popular because it improves comfort, frees up wall space, and can be more energy efficient than traditional radiators when designed correctly.
On a cold winter morning, stepping onto a warm floor can make a bathroom feel noticeably more comfortable. But underfloor heating is not the right solution for every home, so it is worth understanding the options before you decide.
Why homeowners choose underfloor heating
The main reasons people install underfloor heating are:
A warmer, more comfortable bathroom
Even heat distribution across the room
More usable wall space
A cleaner, modern look without radiators
Lower maintenance with electric systems
Unlike a radiator, which heats one area of the room, underfloor heating spreads heat more evenly across the floor surface. This creates a more consistent temperature and reduces cold spots.
A great option for small bathrooms
In smaller bathrooms, every centimetre matters. Removing a radiator can free up valuable space for furniture, storage, or a larger shower enclosure.
Because the heating system is hidden beneath the floor, it allows much greater flexibility when planning the layout of the room.
Electric vs water underfloor heating
There are two main types of underfloor heating.
Electric underfloor heating
Electric systems use heating mats or cables installed beneath the floor finish. They are usually the most practical option for bathroom renovations because they can often be fitted with minimal increase in floor height.
Best for:
Bathrooms
En-suites
Cloakrooms
Renovation projects
Electric systems heat up quickly and require very little maintenance once installed.
Water (wet) underfloor heating
Water-based systems circulate warm water through pipes beneath the floor. They are generally more efficient for larger areas but are usually more expensive to install.
Best for:
Large bathrooms
Whole-house heating projects
New builds or major refurbishments
Is underfloor heating energy efficient?
A well-designed underfloor heating system can be very efficient because it operates at a lower temperature than many radiator systems. Wet systems in particular often run at around 30–35°C, which can reduce energy consumption when combined with good insulation.
However, savings depend on:
The insulation of the property
The floor construction
The heating controls
How the system is used
I always recommend installing good-quality insulation beneath the heating system to minimise heat loss.
Maintenance
Electric underfloor heating requires almost no routine maintenance because the heating cables are sealed beneath the floor.
Water systems need periodic checks and should be serviced as part of the overall heating system, particularly if connected to a boiler or heat pump.
Is it suitable for every bathroom?
Not always. Underfloor heating works best with tile, stone, or other hard floor finishes that conduct heat well. Thick carpets and some timber floors can reduce performance unless they are specifically rated for use with underfloor heating.
It is also worth remembering that underfloor heating usually warms up more slowly than a radiator, so a programmable thermostat is important.
My advice
For most bathroom renovations in South London, I generally recommend electric underfloor heating because it is simpler to install, requires minimal maintenance, and works particularly well in smaller rooms.
If you are renovating a large bathroom, extending your home, or considering underfloor heating throughout the property, a water-based system may be the better long-term investment.
Final thoughts
Underfloor heating is one of those upgrades that homeowners rarely regret once it is installed. It improves comfort, creates a cleaner bathroom design, and can make better use of limited space.
The right system depends on the size of the room, your budget, and whether the project is a renovation or a new build. If you’re unsure which option would suit your bathroom, I’m always happy to offer practical advice based on your specific project.