How to price central heating installation jobs in the UK (2026 guide)

Central heating installation is one of the highest-value job types available to Gas Safe registered heating engineers in the UK. Whether you are pricing a full system install in a property that currently has no central heating, a first-fix installation in a new build, or a complete system replacement in a property moving from a back boiler to a modern combi, the commercial opportunity is significant — and the difference between a profitable job and a loss-making one often comes down to how accurately the job was scoped and quoted before work started. This guide covers how to price central heating installation jobs correctly in 2026, from full system installs and radiator specifications through to underfloor heating and Gas Safe commissioning documentation.

Full Central Heating System from Scratch

Installing a complete central heating system in a property with no existing heating is a major project that typically takes three to five days in a two to three bedroom property and five to eight days in a larger four or five bedroom house. The scope includes boiler supply and installation, all pipework from the boiler to radiators and back, radiator supply and fitting, programmer, room thermostat, thermostatic radiator valves (TRVs), inhibitor dosing, system flush, commissioning, and Gas Safe certificate. For a two to three bedroom property, the total cost of labour and materials for a full system install from scratch ranges from £4,000 to £8,000 depending on the boiler specification, the number of radiators, the pipework run complexity, and whether the customer is supplying any materials. Larger properties or those with awkward layouts — solid walls, deep joists, or difficult boiler positions — push toward the top of that range and beyond. Always survey the property in person before quoting: a quoted price based on a brief phone conversation for a central heating install is a risk you should not take. Walk the property, count the rooms, identify where pipework will run, and assess the boiler location and flue route before you issue any figures.

Boiler and Controls Selection

The boiler and controls specification is the most consequential decision in a central heating installation — it affects the system performance, the customer's running costs, and your own liability if the wrong product is specified for the property. Combi boilers are the dominant choice for most UK domestic installations: they provide heating and instant hot water from a single appliance without a separate hot water cylinder or cold water tank. They are appropriate for properties with one bathroom and moderate hot water demand. System boilers work with a separate hot water cylinder and are the correct choice for properties with two or more bathrooms, high hot water demand, or where solar thermal is being incorporated. Heat-only (regular) boilers suit older properties where an existing vented cylinder and header tanks are already in place and the customer does not want to alter the loft pipework. In 2026, smart controls — Nest, Hive, Honeywell Home, or Drayton Wiser — are increasingly expected by customers and should be offered as standard with all new installations. Smart controls improve system efficiency, reduce customer complaints about heating performance, and create a compelling upsell opportunity at £150 to £350 supply and fit above the cost of a basic programmer and thermostat.

Radiator Sizing and Specification

Correct radiator sizing is a technical requirement, not a preference — undersized radiators in a room mean the boiler runs for longer to reach the set temperature, wasting energy and generating customer complaints. Radiator sizing is calculated using the room volume, the heat loss through walls, windows, and floor, and the desired design temperature. CIBSE and TIMSA guidance provides the methodology, and several free online calculators — including the Heatmiser and Myson sizing tools — make the process straightforward once you have measured the room dimensions and identified the wall construction. Standard double-panel double-convector (K2 or Type 22) radiators are appropriate for most domestic rooms. Single-panel radiators are adequate for small rooms or hallways. Low surface temperature (LST) radiators are required in rooms where vulnerable people — children, elderly, or disabled occupants — may be at risk of contact burns. Designer towel radiators in bathrooms are a profitable upsell: supply and fit at £200 to £500 per unit versus a basic bathroom radiator, with the customer typically selecting the towel rail style themselves and supplying you with the product to fit. Price radiator supply and fit at £80 to £150 per standard radiator including all fittings, valves, and brackets.

Underfloor Heating Installation Pricing

Underfloor heating (UFH) is an increasingly common specification in both new build and high-end renovation projects, and pricing it correctly is more complex than pricing a radiator system. There are two types: wet (hydronic) UFH, which circulates warm water through pipework embedded in or beneath the floor, and electric UFH, which uses a heating mat or cable element beneath the floor finish. Wet UFH connected to a boiler or heat pump is the more cost-effective option for whole-house heating — typical installation costs are £60 to £100 per square metre for the UFH element alone, excluding the boiler or heat pump, manifold, and any screed. Electric UFH is typically used for individual rooms — a bathroom or kitchen — where it supplements a radiator system rather than replacing it; typical costs are £40 to £75 per square metre including the heating element and thermostat but excluding floor finish. When pricing wet UFH, allow time for: manifold installation and connection, pipework layout and clipping, pressure testing before screed, system fill, bleed, and commissioning at first fix, and return visits for final commissioning after screed has cured (typically 28 days). Multi-visit jobs must be priced to cover all site attendances, not just the first fix.

Pipework: Microbore vs 15mm, Copper vs Plastic

Pipework material and sizing choices affect both the installation cost and the long-term performance of the system, and customers increasingly ask about the difference between options. Standard 15mm copper pipework is the traditional choice for domestic central heating and remains the most commonly specified material. It is durable, solderable, and accepted by all boiler manufacturers. Microbore (8mm or 10mm) pipework runs from a central manifold to individual radiators and is useful in properties where pipe runs are long or where minimising damage to floors and walls is a priority — the smaller pipe is easier to route through joists and under floorboards. Plastic push-fit systems — Speedfit, Hep2O, or Wavin — reduce installation time significantly on runs that can accommodate the slightly larger fitting bulk. Plastic is not appropriate everywhere: some boiler manufacturers require copper connections for the first metre of pipework from the appliance, and plastic should not be used in areas of high heat flux or where the pipe cannot be adequately supported. Price pipework by the metre as part of your system build-up cost: copper 15mm at approximately £4 to £6 per metre installed, plastic at £3 to £5 per metre installed, with additional allowance for fittings, clips, and any notching or chasing required in floors or walls.

Commissioning, Gas Safe Certification and Handover

Commissioning a central heating system correctly is both a legal obligation and a commercial safeguard. Gas Safe registered engineers must complete a commissioning checklist for every new gas appliance installation — this includes checking gas soundness, setting the boiler to the correct flow temperature, balancing the system by adjusting radiator lockshield valves, measuring combustion at the flue, and completing the Benchmark commissioning document in the boiler instruction pack. The Benchmark document is the evidence that the boiler was installed and commissioned correctly — without it, the manufacturer warranty is typically invalid. Ensure the customer understands this: it strengthens your professional credibility and distinguishes you from engineers who skip the commissioning record. The Gas Safe certificate (Building Regulations Compliance Certificate) must be issued for all new boiler installations in England and Wales; your APHC, NAPIT, or Gas Safe registration covers this notification. Build your commissioning time into the job price — allow half a day for commissioning, documentation, and customer handover on a standard central heating installation. A proper handover, where you walk the customer through the controls, the programmer, and how to bleed a radiator if needed, reduces after-installation call-backs and improves review ratings.

Trade2Base for Heating Installation Businesses

Trade2Base helps heating engineers produce accurate, professional quotes for central heating installations without spending hours building spreadsheets. Pre-built quote templates for system types — combi replacement, full system install, UFH first fix — let you add line items for each component, apply your margin, and send a branded PDF quote within minutes of completing a site survey. Job scheduling keeps multi-visit installs organised across first fix, second fix, and commissioning visits, with automated reminders to customers before each attendance. After handover, an automated review request goes to the customer to build your Google rating — the most important marketing asset for a heating installation business winning domestic work.