Replace a radiator like for like or upgrade? Pros, cons and costs
Updated 6 November 2026 · By the Radiator Installation team
Short answer: A like-for-like radiator swap is the quickest and cheapest option when the old radiator is the right size for the room, because the existing pipes and valves can usually be reused. Upgrading to a larger, double-panel or different style radiator costs more but is the better choice when a room is cold, you are fitting a heat pump or you want a different look.
Side-by-side comparison
| Like for like | Upgrade | |
|---|---|---|
| Typical cost per radiator | £180 to £400 | £300 to £900 or more |
| Time | 1 to 2 hours | Half a day or more |
| Pipework changes | Usually none | Often needed |
| Fixes a cold room | Only if the old one was faulty | Yes, if sized correctly |
| Suits a heat pump | Not always | Yes, if sized for low temperatures |
When like for like is right
- The room heats well but the radiator is leaking, rusting or damaged
- You want the job done quickly with minimal disruption
- The pipe centres match standard sizes
When upgrading is right
- The room never gets warm enough
- You are planning a heat pump
- You want a vertical, column or designer radiator
- The room has been extended or knocked through
Related guides
- How much does radiator installation cost in the UK? (2026 guide)
- What size radiator do I need? BTU and sizing guide
- How to choose a radiator installer: questions to ask and red flags
- Types of radiator explained: panel, column, vertical and more
- Radiator replacement: how long it takes and what to expect on the day
- Radiator problems: repair, flush or replace?
- Radiators in rented homes: a landlord's guide
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