Radiator Replacement Cost UK: How Much to Replace a Radiator in 2026

How much does it cost to replace a radiator in 2026?

For most UK homes, swapping one tired radiator for a similar new one costs around £200 all-in. That includes the radiator, a pair of valves and the fitting.

The realistic range is £150 to £350, depending on the radiator's size and type, where you live, and whether the engineer has to drain the system or alter pipework.

"Like-for-like" is the cheapest scenario because the pipes and valve positions already exist. The job gets dearer the moment new pipework, a bigger radiator or a different location is involved.

Radiator replacement cost by size

Size drives both the radiator price and the labour. A bigger radiator holds more water, takes longer to drain and refill, and is heavier to handle.

Job	Radiator (supply)	Labour (fit only)	Typical all-in
Small (single panel, e.g. 600 × 400mm)	£20–£40	£50–£100	from £150
Medium (double panel, e.g. 600 × 1000mm)	£40–£80	£50–£100	from £200
Large (double panel, e.g. 700 × 1800mm)	£85–£120	£50–£100	from £250

The labour for the fit itself is fairly flat at £50 to £100. The "all-in" figure rises with the radiator price and any extra draining a larger unit demands.

Cost by radiator type

Type matters more than size for the bill. A standard steel panel is cheap; a cast-iron, designer or vertical statement piece can cost many times as much for the unit alone.

Radiator type	Supply-only price (each)
Standard steel panel	£20–£120
Flat-panel (modern)	£70–£300
Column	£100–£500
Designer	£180–£700
Vertical	£100–£575
Heated towel rail	£25–£500
Stainless steel	£175–£1,000
Mirror radiator	£200–£650
Cast iron (period style)	£150–£1,000

Heavier and awkward types (cast iron, large verticals, towel rails relocated in a bathroom) also push labour up because they take longer to handle, hang and connect.

Labour costs and engineer day rates

Most plumbers and heating engineers charge by the hour or by the day. As a rough guide for 2026:

• Hourly rate: £40–£75 per hour (add roughly £20–£40/hr in London and the South East).
• Day rate: £180–£350 per engineer, averaging about £265.
• Two-person crew: around £750 a day for larger or whole-house jobs.
• Full single-radiator job (labour): roughly £150 small, £200 medium, £250 large.

Regionally, expect £200–£300 per radiator in London and the South East versus around £150 in the North. A simple swap takes 1 to 2 hours; a designer radiator or a move takes 3 to 4 hours.

Like-for-like swap vs adding a new radiator vs moving one

These three jobs sound similar but the pipework involved makes them very different prices.

Job	What's involved	Indicative cost	Time
Like-for-like swap	Drain, remove old, hang new on existing pipes	£150–£350 all-in	1–2 hrs
Add a new radiator	New pipework run from existing circuit	£250–£350 labour	2–5 hrs
Move to another wall	Drain, cap old pipes, reroute and re-pipe	£150–£400 (~£275)	3–4 hrs
Removal only	Disconnect, drain affected section, cap off	£80–£120	under 1 hr

Moving a radiator on the same wall is cheaper than moving it to a different wall, because the further the pipes have to travel, the more draining and rerouting is needed.

Cost to replace all the radiators in your house

Doing the whole house at once is usually cheaper per radiator, because the system only needs draining and refilling once and the engineer is on site for a single visit.

Property	Typical radiators	Indicative whole-house cost	Time
2-bed house	4–5	£600–£1,000	1 day
3-bed house	6–8	£900–£1,600	1–2 days
4-bed+ house	9–10+	£1,600+	2–3 days

Upgrading to designer, column or vertical radiators throughout can push a whole-house figure well past these ranges — the unit prices in the type table above stack up quickly. A whole-house replacement is a good moment to consider whether the wider system needs attention; see our guide to the cost of a new central heating system.

Extra costs people forget

The radiator and fitting are rarely the whole story. These are the add-ons that quietly lift a quote:

• Thermostatic radiator valves (TRVs): £70–£140 fitted per radiator (around £50 for a basic swap done while the system is already drained). Worth fitting for room-by-room control — see thermostatic radiator valves (TRVs) explained.
• Draining and refilling the system: built into most swaps, but a separate cost if done in isolation.
• Balancing afterwards: rooms can run unevenly once a radiator changes; learn how to balance your radiators.
• Power flush: roughly £400 if the system is full of sludge — see the full power flush cost breakdown.
• Inhibitor refill: a chemical added on refill to slow corrosion and sludge.
• Magnetic filter: fitted near the boiler to catch sludge and protect the new radiator.

Older homes can spring surprises: narrow microbore pipe, or insulation around old pipework that may contain asbestos. Either can add time and cost, and any suspected asbestos must be handled by a licensed specialist — never disturb it yourself.

Does boiler cover or home insurance pay for a new radiator?

This is the part most cost-guides skip. In short: usually not for a replacement or upgrade.

Boiler-only cover protects the boiler itself. It generally does not extend to radiators, pipework or controls at all.

Central heating cover is broader and can include repairs to radiators, valves and pipework. But it typically covers breakdowns and faults — for example fixing a leaking radiator or a stuck valve — not swapping a working radiator for a nicer one, and not cosmetic or upgrade work. What counts as a covered repair varies between providers and plans.

Scenario	Boiler-only cover	Central heating cover
Radiator leaks / internal fault	Usually no	Often yes (repair)
Faulty radiator valve	Usually no	Often yes (repair)
Swapping a working rad for a new style	No	No (upgrade)
Adding or moving a radiator	No	No (improvement)
Sludge / cosmetic / "it's old"	No	Usually no

So a faulty valve might be a covered repair while a tatty-but-working radiator is your own bill. Cover terms differ between products and providers, so always read the policy: see central heating cover and what boiler cover doesn't cover before assuming. Note that FCA-regulated boiler insurance and unregulated service or care plans are different products — a service plan is not insurance even when it covers repairs, so check which one you are buying and what protections come with it.

Should you replace, or just bleed, flush or balance it first?

A cold radiator is often not a dead radiator. Before you pay to replace one, work out why it's underperforming — the symptom tells you the cause.

• Cold at the top, warm at the bottom: trapped air. Bleed it before you replace it — this is often a quick, low-cost fix.
• Cold at the bottom, warm at the top: sludge build-up. See radiator cold at the bottom (sludge); a flush usually beats a new radiator.
• Some rooms hot, others cold: the system may need balancing, not new radiators.
• Pinhole leak or rust through the panel: this is when replacement genuinely makes sense.

If several radiators are cold at the bottom, the real problem is often sludge in your central heating — and replacing radiators without flushing just means the new ones silt up too.

Choosing the right replacement

Don't just match the old radiator's dimensions — match its heat output (BTU) to the room. An undersized radiator will never warm the room; an oversized one wastes energy.

A free online BTU calculator (room size, window area, external walls) gives a target output. Most merchants list each radiator's BTU/watt figure.

• Will a bigger radiator need a bigger boiler? One larger radiator usually won't. But upsizing many radiators at once can exceed the boiler's output, so it's worth an engineer's view.
• Low-pressure / gravity-fed homes: some designer and tall vertical radiators need decent pressure to heat evenly — check before buying.

Can you replace a radiator yourself?

A like-for-like radiator swap is not notifiable gas work — it's plumbing on the sealed water side, so a competent DIYer can legally do it, provided you do not remove the boiler casing or touch any gas component. You are not touching the gas, burner or flue.

That said, the risks are real: draining the system, refilling it correctly, re-adding inhibitor, re-pressurising a combi and balancing afterwards all go wrong easily. A botched refill can air-lock or sludge the whole system. If you are not confident, use a qualified plumber or heating engineer.

How to cut the cost or get the best quote

A few simple moves keep the bill down without cutting corners:

• Batch the work — replacing several radiators in one visit shares the draining, refilling and call-out cost.
• Supply your own radiator if you've found the right size and BTU, and pay the engineer for labour only.
• Get three written quotes and check what each includes (valves, draining, inhibitor, balancing, waste removal).
• Add inhibitor and consider a magnetic filter at the same time to protect the new radiator and avoid repeat failures.
• Use a qualified, insured tradesperson; for any gas-side work, confirm they're on the Gas Safe Register.

This article is general information, not financial or gas-safety advice. We compare a selected panel of providers, not the whole market, and may earn a commission if you buy through our links. Always have gas appliances checked and repaired by a Gas Safe registered engineer; in a gas emergency call 0800 111 999. Prices are indicative UK guides for 2026 — confirm current prices on the provider's own site.