One like-for-like panel radiator costs from about £200 fitted, and the radiator replacement cost climbs to £1,500 or more once you add several radiators or designer models. The radiator itself often costs more than the labour, so your choice of style moves the total more than anything else. The job is described on our radiator replacement page.
Radiator replacement cost by job size
Typical UK radiator replacement and installation costs, fitted
| Job size | What it usually covers | Typical cost |
|---|---|---|
| Small | One like-for-like panel radiator swap, existing valves reused | £200–£400 |
| Typical | Several radiators, or one new radiator in a new position with pipework | £400–£800 |
| Large | Column, designer or tall radiators, or a whole floor of replacements | £800–£1,500+ |
Designer radiators can cost several hundred pounds each before anyone fits them, so a handful can take you past the top of this range.
What affects radiator replacement cost
- Type. A standard single or double panel is cheapest. Column, vertical and towel radiators cost more.
- Size and output. A larger radiator gives more heat but costs more and needs more wall space.
- Position. Fitting a radiator where one stood is quick. A new position needs new pipework and sometimes lifted floors.
- Valves. New thermostatic valves add a small amount per radiator, and old ones are often changed anyway.
- Draining down. Draining the whole system takes longer than isolating one radiator, though a modern system with isolation valves is quicker.
- System condition. Black sludge in the old radiator usually means the circuit needs cleaning too.
Replacing one radiator or the lot?
Swapping one failed radiator is straightforward. If several are old, leaking or cold at the bottom, replacing them in one visit saves repeat call-out charges. Before you do that, check the circuit, because new radiators fed with dirty water soon clog. Our central heating problems explained guide shows how to tell a radiator fault from a system fault, and power flushing is the usual cure for the second kind.
Output depends on the radiator's size, the water temperature and how well the room keeps heat in. If the room stays cold, an engineer should check the heat loss before you buy.
Do you need a Gas Safe engineer?
Fitting a radiator does not itself involve gas, so a plumber or heating engineer who is not Gas Safe registered can do it. Anything touching the boiler needs a registered engineer. You can check registration on the Gas Safe Register. If you are fitting radiators during a bigger refit, the heating a renovation or extension guide explains how to plan them.
Getting a fair radiator quote
Ask the engineer to list each radiator by size and output, with valves, labour and disposal of the old ones as separate lines. Two or three written prices will show you what is normal. The heating cost calculator gives a budget range to hold them against.
Frequently asked questions
How much does it cost to replace a radiator?
As a guide, one like-for-like panel radiator costs about £200 to £400 fitted. Several radiators, or designer models, can reach £800 to £1,500 or more.
Can I replace a radiator without draining the whole system?
Often yes. If the radiator has working valves on both sides, an engineer can isolate it and drain only that one. Older systems may need a full drain down.
Will a bigger radiator make my room warmer?
It can, if the old one was too small for the room. Output also depends on how well the room keeps heat in, so the right size comes from a heat loss check.
Do I need a Gas Safe engineer to fit a radiator?
Not for the radiator alone, as it does not involve gas. Work on the boiler itself does need a Gas Safe registered engineer.
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