Underfloor Heating Quotation Guide to Avoid Costly Mistakes

Introduction: Average UK market rates:

Getting a straight answer about cost is rarely simple. It’s frustrating. You ask for a price, and you get a list of caveats.

That’s because an Underfloor Heating Quotation isn’t like buying a radiator off the shelf; it’s a bespoke construction project tailored to your specific floor layout, insulation levels, and heat source. One size definitely does not fit all.

But you need a baseline. To help you plan, we’ve collated the average 2026 market rates for the UK.

At a Glance: Typical Installation Costs (2026)

Note: These figures are estimates for “supply and fit”. Regional labour rates—especially in London—can push these higher.

Ready to request quotes? Get free, no-obligation estimates from professional installers via the Underfloor Heating Directory.

System Selection: The First Price Pivot

Your quote hinges on one fundamental choice. Water or Electric?

Each has a completely different financial profile.

Electric (Dry) Systems

Think of this as the “lightweight” option. Electric systems use thin wires or mats that sit directly beneath your tiles or timber. They are incredibly quick to install.

• The Cost Dynamic: Low upfront cost. High running cost.
• Why choose it? If you’re just doing up a bathroom or a small kitchen, it’s a no-brainer. You don’t need a plumber. An electrician and a tiler can sort it out in a day. The electric underfloor heating cost per square metre usually lands between £50 and £85.
• The Catch: Electricity is expensive. Heating a large open-plan living area this way will send your monthly bills skyrocketing.

Water-Based (Wet) Systems

This is the heavy hitter. Warm water circulates through durable pipes embedded in your floor.

• The Cost Dynamic: High upfront cost. Low running cost.
• Why choose it? It’s efficient. Extremely efficient. When paired with a heat pump, running costs are minimal. It’s the standard for new builds and major renovations.
• The Catch: Installation is invasive. It involves manifolds, plumbing connections, and often a fresh layer of screed. That’s why the wet underfloor heating installation cost is higher, typically £90 to £185 per m².

The “Hidden Costs” Your Quote Might Miss

Here is where homeowners often get caught out.

A “cheaper” quote might look attractive on paper because it strips out the essential preparatory work. When you compare quotes, look for these missing line items. If they aren’t there, ask why.

Before you compare prices, check whether each quote includes the right qualified trades. Our underfloor heating installer qualifications guide explains what to ask for on electric, wet, gas boiler, and heat pump projects.

1. The Screed Factor

With a wet system, the pipes are usually encased in screed. Who is paying for that? Some installers include the pipe laying but not the screed pouring. Liquid screed is fantastic for heat conductivity, but it’s not cheap. If it’s not in the quote, add £15 - £25 per m² to your budget immediately.

2. Floor Height Adjustments

Retrofitting? Be careful. Adding underfloor heating raises the floor level. Even “low profile” systems add 15-20mm. That sounds negligible, but it means your doors won’t close. They need trimming. Skirting boards need removing and refitting. Kitchen plinths might need cutting down. Does your heating engineer do carpentry? Probably not. You’ll need to hire a joiner.

3. Electrical Upgrades

Wet systems need a manifold. That manifold needs a wiring centre. That wiring centre needs a spur from your consumer unit. If your current fuse box is ancient or full, you might need an upgrade to accommodate the new pumps and zone controls. A standard plumbing quote rarely covers this electrical work.

4. Insulation Boards

We cannot stress this enough: Do not skip insulation. Some quotes omit insulation boards to keep the price down. Without them, you are paying to heat the earth beneath your house. Ensure your quote specifies high-performance insulation (like PIR boards), not just a thin reflective foil.

Running Costs & ROI: The Long Game

You have to look past the installation price tag.

While the initial outlay might make you wince, especially when compared to a bog-standard radiator swap, the long-term efficiency gains—often hovering around the 25% mark—paint a very different financial picture.

Monthly Cost Estimates (10m² Room):

• Electric System: £2.25 - £4.17 per month.
• Wet System: £0.42 - £1.00 per month.

Based on standard 2026 energy caps. Actual costs depend on your insulation.

If you are renovating a whole floor, the wet system pays for itself. It adds value to the property, too. Estate agents love listing “underfloor heating” as a premium feature.

Tip: Considering a heat pump? A wet UFH system is its perfect partner. They both thrive at low flow temperatures (35°C - 45°C), maximising your system’s efficiency (CoP). Check out our Heat Loss Calculator to see what your home needs.

How to Compare Quotes (The “Apples-to-Apples” Checklist)

You have three quotes. One is £2,000 cheaper than the others. Before you bite their hand off, run them through this checklist.

• Scope: Is it “Supply & Fit” or just “Supply”?
• Manifold: Is the manifold and mixing unit included? (Expensive kit).
• Controls: Does it include thermostats for every room? Are they smart/WiFi enabled?
• Commissioning: Will they pressure test the system and fill it with inhibited water?
• Waste: Will they take the rubbish away? (Packaging fills a skip fast).
• Warranty: Is the warranty on the pipe (usually 50 years) or the workmanship (usually 1-2 years)? You need both.

Already have quotes in hand? Upload them to the UFH Quote Analyser to instantly check if the price is competitive and spot any missing line items.

Frequently Asked Questions

How much should underfloor heating cost for a 20m² room? For a wet system, expect to pay between £2,500 and £3,500 fully installed. For electric, it might be closer to £1,200 - £1,500, though running costs will be higher.

Do you have to dig up the floor? Not always. In new builds, it goes in the floor slab. For renovations, we now use “overlay” systems. These sit right on top of your existing floorboards or concrete. They are thin (15mm-20mm) and save you the mess of excavation.

Which type of underfloor heating is the cheapest to run? Water-based (wet) systems are significantly cheaper to run. Gas and heat pump energy tariffs are lower than standard electricity tariffs. If you have solar panels, however, electric heating becomes much more viable.

Is underfloor heating worth it? For comfort? Absolutely. No cold spots. No ugly radiators ruining your wall space. For money? Yes, if you plan to stay in the home for a few years or are pairing it with a heat pump.

Ready to get accurate numbers?

Don’t guess. Every house has a unique heat profile. Use our tools to refine your plan before you call the installers.

• Heat Loss Calculator - Find out how much power you actually need.
• Electric UFH Guide - Deep dive into electric options.

Disclaimer: Prices cited are based on UK market averages for 2026 and subject to regional variation.

Ready to get your quotes? Compare installers and get competitive quotes through the Underfloor Heating Directory.