How to Price Underfloor Heating
Underfloor heating is priced by the floor, not the room. The build-up, the number of zones and the commissioning all move the number — and the details you miss on survey are the ones that eat your margin.
Wet underfloor heating (UFH) looks simple to price — pipe by the metre, a manifold, a few thermostats — but the real cost is in the floor build-up, the zoning and the commissioning. Two rooms the same size can price very differently depending on whether you are laying into new screed, clipping to insulation, or retrofitting a low-profile system over an existing floor.
This guide sets out how to price a UFH job the way it actually costs: the floor construction, the manifold and zones, the controls, and the commissioning and balancing that make it work. Cost each properly and your quote holds up against a rough one that has ignored the build-up.
Key takeaways
- Price by the floor construction — new screed, insulated clip rail, or low-profile retrofit — not just by area.
- Zones and manifold ports drive both material and commissioning cost, so establish the zoning at survey.
- Retrofit UFH often adds floor height and door adjustments; catch those on survey before quoting.
- Controls, wiring centre and actuators are a real line item, especially on multi-zone jobs.
- Commissioning and balancing the loops is skilled time — price it in rather than treating it as a final hour.
The floor build-up decides the price
The single biggest variable is what the pipe goes into. UFH laid into a new screed on insulation is one cost; clipping to insulation panels or fixing to a spreader-plate system is another; and a low-profile overlay retrofitted onto an existing floor is different again. Establish the build-up on survey, because it changes both materials and labour dramatically.
Retrofit especially carries hidden costs: floor height, door undercuts, threshold levels and the state of the existing subfloor. A room that looks like a straightforward overlay can turn into a levelling job, so survey the floor properly before you put a number on it.
Survey the floor, not the room
Two identical-looking rooms can price very differently once you know the floor construction. Never quote UFH from area alone — the build-up is where the cost lives.
Zones, manifolds and pipe layout
The number of heating zones sets the size of the manifold, the number of actuators, and much of the commissioning effort. More zones give the customer better control but cost more in ports, wiring and balancing time, so agree the zoning with the customer before you price it.
Pipe centres and loop lengths follow the room's heat requirement, so a properly sized layout — informed by the heat loss and the design flow temperature — decides how much pipe and how many loops you actually need. Guessing the layout either over-prices the job or leaves cold spots.
Doing this on a job? Quotes in TradePlanr — part of TradePlanr. Free to start, no card needed.
Controls, wiring and heat source
Thermostats, the wiring centre, actuators and the blending/mixing arrangement on the manifold are a genuine line item, and they scale with the number of zones. On a multi-zone job the controls and wiring can be a meaningful share of the total, so cost them explicitly.
How the UFH ties into the heat source matters too. UFH pairs especially well with a heat pump because it runs happily at a low flow temperature, but on a boiler system you may need a blending valve to protect the floor. Price the interface, not just the loops.
Commissioning, balancing and handover
A UFH system has to be pressure-tested, filled, vented and then balanced loop by loop at the manifold so each zone gets the right flow. That is skilled time and it is what makes the floor heat evenly — under-price it and you are back for callbacks about a cold corner.
Finish with the commissioning record and handover so the customer has the settings and the guarantee behind them. Doing the paperwork properly is part of the job you are quoting, so account for it rather than absorbing it silently.
Itemise it, then invoice in stages
TradePlanr lets you quote UFH as clear line items — floor build-up, manifold and zones, controls, commissioning — and stage the invoicing across deposit, first fix and commissioning, then issue the commissioning certificate on completion.
From guidance to action
Frequently asked questions
Why does underfloor heating cost more in one room than another?
Because the floor build-up differs. Laying into new screed, clipping to insulation, or retrofitting a low-profile overlay onto an existing floor all cost differently, even for the same area. The construction, not the size, drives the price.
How do zones affect the price?
Each zone adds a manifold port, an actuator, controls wiring and commissioning time. More zones mean better room-by-room control but a higher cost, so agree the zoning with the customer before quoting.
Is retrofit UFH more expensive than in new build?
Often yes, because you're working with an existing floor: height build-up, door undercuts, threshold levels and possible levelling of the subfloor all add cost. Survey the existing floor carefully before you put a figure on it.
Should I price commissioning separately?
Cost it in explicitly. Pressure-testing, filling and balancing the loops is skilled time that makes the floor heat evenly — treating it as a free final hour is how UFH jobs lose their margin.
Related guides
Underfloor Heating Installation Guide
Wet vs electric UFH, screed and pipe spacing, commissioning and handover documentation.
Underfloor Heating Not Working: Fault-Finding
A logical fault-finding order for wet underfloor heating: heat source and controls, actuators and manifold, air locks and balancing.
How to Price a Heat Pump Installation
How to build a defensible air source heat pump quote: survey and design, emitter upgrades, electrical supply, commissioning and MCS admin.
