How much should underfloor heating cost?

Let’s Fix Group Ltd designs, installs and repairs underfloor heating across Greater London and the South East. Call David Prince and his team of Gas Safe engineers for fixed pricing, honest system advice and a clear written quotation.

Underfloor heating quotes vary widely, and the reason is rarely the pipe. It is the system type, the floor build-up and the controls.

David Prince heads a team of our own Gas Safe engineers, never subcontractors, across Greater London and the South East, with fixed pricing and a 10-year guarantee on installations. Whether you need underfloor heating or underfloor heating repair in Croydon, we cover the whole area.

Tell us the floor area and the floor type and we will explain exactly what your system needs and what it will cost.

How much should underfloor heating cost?

Underfloor heating should cost roughly in line with the floor area being heated, the system type chosen and the amount of preparation the floor needs. A small electric mat in a bathroom sits at the low end, while a wet system piped across a whole ground floor and tied into a boiler or heat pump sits at the top end.

That is the honest short answer, and the rest of this article explains what actually moves the number up and down, so a quotation makes sense before an engineer ever measures a room.

The two system types set the starting point for any figure

There are two families of system, and they price very differently. Electric systems use thin heating mats or loose cable laid in adhesive or screed and wired back to a thermostat. They are shallow, quick to install and popular in bathrooms, kitchens and single-room refurbishments. Because the labour is light and no pipework is involved, the cost per square metre is lower, but running cost is tied to electricity rates, so they suit small areas rather than whole houses.

Wet systems, sometimes called hydronic, circulate warm water through continuous pipe loops connected to a manifold and blending valve, then to the heat source. Materials and labour cost more up front because the manifold, actuators, pump, pipe loops and controls all have to be installed and commissioned. Running costs are usually lower per unit of heat, particularly with a heat pump, which is why wet systems dominate extensions, new builds and full ground-floor retrofits.

So the first question that changes any price is not the room, it is which family of system the property can accept. Floor build-up height, joist type and the existing heat source all feed into that decision, and an engineer will normally take a floor depth measurement before quoting. Whether you need underfloor heating or underfloor heating installation services High Wycombe, our engineers cover the whole area.

Floor area, build-up and preparation move the cost more than the pipe itself

Pipe and cable are a modest slice of the total. The bigger variables are the floor itself and how much work is needed to get the system into it.

• Heated area: cost scales with square metres, but the manifold and controls are largely a fixed cost, so a very small area carries a higher price per square metre than a large one.
• Screed or low profile: a traditional sand and cement screed is cheaper in material but adds depth and a long drying period. Low-profile boards and overlay panels cost more per square metre and save height and time.
• Suspended timber floors: lifting boards, fitting spreader plates between joists and insulating below adds labour that a solid floor does not need.
• Insulation: a system laid over uninsulated concrete loses heat downwards. Insulation board is not optional if the system is to perform, and it is a real line on the quote.
• Zoning and controls: each zone needs its own thermostat and actuator. Six individually controlled rooms cost more in controls than one open-plan space.
• Floor covering: tile and stone conduct heat well. Engineered timber and certain vinyls need lower flow temperatures and sometimes extra sensors, which affects the design.

Retrofit work also carries costs that new build does not: protecting the property, removing existing floor coverings, taking away waste and making good afterwards. Our engineers leave a home as it was found, and that tidy-up is part of the job rather than an extra. Whether you need underfloor heating or underfloor heating services Luton, we cover the whole area.

Heat source, commissioning and compliance are part of the true price

A wet system is only as good as what feeds it. If the existing boiler is undersized or the pipework cannot deliver the required flow, the quote may include upgrading the heat source or reworking the primary circuit. Where a heat pump is involved, the design flow temperature is lower, so loop spacing tightens and the design work becomes more detailed. All of that is engineering time, not padding.

Commissioning matters just as much. Loops are pressure tested, the manifold is balanced flow by flow, the screed is brought up to temperature on a controlled curve rather than switched straight to full output, and the controls are set up and demonstrated. Skipping any of that is where cold patches, noisy manifolds and cracked screed come from later.

Anything touching a gas appliance must be carried out by a Gas Safe registered engineer, as the Gas Safe Register sets out, and our team is Gas Safe registered. Our installations carry a 10-year guarantee, our pricing is fixed and explained before work starts, so there are no call-out surprises, and we are fully insured. If you want to see the full scope of what we design, install and commission, our underfloor heating pages set it out in detail.

Repair costs follow a different pattern to installation costs

Repairs are priced on diagnosis and access, not on floor area. Most faults are not in the buried pipe at all: failed actuators, a seized zone valve, an airlocked loop, a dead thermostat, a wiring centre fault or a pump that has stopped. Those are surface-level parts, reached at the manifold, and they are the cheapest outcome by a wide margin.

Where a genuine leak or a break in a loop is suspected, we locate it before anything is lifted. Thermal imaging traces loop routes and temperature anomalies through the finished floor, acoustic and tracer gas methods pinpoint pressure loss, so the floor is opened in one small place rather than across a room. That non-invasive approach is usually the single biggest saving on an underfloor heating repair, because making good the floor costs far more than the fix.

David Prince heads a team of our own Gas Safe engineers, never subcontractors, working across Greater London and the South East, with over 20 years of experience behind the way the work is designed and checked. Because engineers are based around the areas they cover, nine in ten repairs are sorted the same day. We handle both sides of this trade: new installation and design, and fault finding on systems already in the floor, including ones we did not install.