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Whole-Room Heating
Radiator Installation & Replacement London
A room that never quite gets warm is usually a radiator problem, not a boiler problem — undersized for the space, corroded, or fighting a system that's never been balanced. We install new radiators, replace tired ones, and upsize rads that were never right for the room, right across London.
Radiator installation costs (typical UK ranges)
| Job | Typical cost | Time |
|---|---|---|
| Like-for-like radiator replacement | £100–£300 | Half a day |
| Whole-house upgrade, 4–5 radiators | £600–£1,000 | 1–2 days |
| Whole-house upgrade, 6–8 radiators | £900–£1,600 | 2–3 days |
Typical UK trade cost-guide ranges, not a quote. Our price is fixed and agreed after a free survey.
Every job is scoped against the room it heats, not just a like-for-like swap: correct BTU output for the floor area, glazing and insulation, sensible TRV placement, and pipework that ties cleanly back into the rest of your system. We work with any boiler brand — this is about getting heat into the room, not which badge is on the boiler in the cupboard.
If you're renovating, extending, or just tired of one cold room in an otherwise warm flat, this is usually the first thing worth fixing before anyone talks about replacing the boiler itself.
Priced as a fixed quote for the radiator, valves and labour, agreed before we start — never an open-ended hourly rate. See /pricing for the current structure; this is a quote-only service so figures are confirmed against your job, not published as a flat rate card.
What you get
- BTU-calculated sizing for the room, not a guess at a like-for-like swap
- Column, panel, vertical and designer radiators fitted to match the space
- Thermostatic radiator valves (TRVs) fitted or upgraded for room-by-room control
- Pipework tied cleanly into your existing system — no boiler-brand dependency
- Old radiators removed and disposed of responsibly
- System pressure and balance checked after every installation, not left to chance
How it works
A method, not a guess
01
Room-by-room survey
We measure the room, note glazing and insulation, and calculate the correct BTU output — not just match what's already on the wall.
02
Fixed quote, no surprises
You get a fixed price for the radiator, valves, pipework and labour before any work starts. No hourly meter running.
03
Fit and connect
New radiator and TRVs fitted, pipework connected and tested, old unit removed from site.
04
Balance and confirm
We check the new radiator heats evenly and doesn't throw the rest of the system out of balance before we leave.
6 things to check before you book radiator installation in London
Verify they provide a fixed, written quote
A reputable installer will provide a detailed written quote that includes all labour, materials, disposal of old radiators, and any required system modifications. This prevents unexpected costs later. Avoid vague verbal estimates or firms that add significant 'extras' on the day.
Check they assess your full heating system
A proper installation requires evaluating your boiler's capacity and pipework to ensure new radiators are correctly sized and balanced. A firm that quotes without a system survey may cause performance issues, like some rooms not heating properly.
Confirm they handle all necessary certifications
Installation often involves minor plumbing and water system work. Ensure the company is Gas Safe registered if boiler adjustments are needed, and can provide a benchmark certificate for the work, confirming compliance with building regulations.
Ask about the post-installation process
A quality service includes bleeding radiators, system balancing, and a full functional test once installed. They should also explain how to use thermostatic radiator valves and provide clear guidance on system maintenance.
Ensure they offer a clear workmanship guarantee
The installer should provide a written guarantee on their labour, separate from radiator manufacturer warranties. This typically covers leaks and operational faults arising from the installation for a specified period, giving you long-term peace of mind.
Review their approach to property protection
Professional teams use floor coverings, dust sheets, and tidy work areas. Confirm their process for managing water drainage during the work to prevent damage to your floors and decorations, which is a key sign of a conscientious operator.
Symptoms
Signs You Need New Radiators
Recognising when your radiators require replacement can improve comfort and system efficiency.
- Cold spots or uneven heat across the radiator panel.
- Persistent leaks or corrosion around the valves or body.
- Excessive noise like constant banging or gurgling during operation.
- Radiators failing to get warm despite a working boiler.
- Visible rust, flaking paint, or an outdated, inefficient design.
Preparing for Your Visit
- 1Note which radiators are problematic (e.g., noisy, cold).
- 2Clear access to all radiators and the boiler for assessment.
- 3Consider your ideal radiator locations and styles for discussion.
When to Choose Radiator Installation
Radiator installation or replacement is the right choice for addressing faulty, leaking, or inefficient individual units. For system-wide issues like cold radiators throughout, a power flush or rebalance may be recommended instead of a full swap.
Book a visitLondon housing stock
Radiator Solutions for London Homes
London's diverse properties have specific heating needs that influence radiator selection and installation.
Victorian terrace
High ceilings and single-glazed windows demand radiators with strong heat output. Careful sizing and placement are key to overcoming draughts and maintaining comfort in period rooms.
Mansion-block flat
Limited wall space and communal heating systems often require compact, efficient radiators. Installation must comply with building regulations and may involve specific pipework considerations.
1930s semi-detached
These homes often have a mix of original and extended spaces. Radiator upgrades can modernise the system and address inconsistent heating between older and newer parts of the property.
New-build extension
Integrating new radiators with the existing system requires careful balancing. This ensures the extension is efficiently heated without affecting performance in the main house.
Questions
Radiator Installation FAQs for London homeowners
How do I know if a radiator is the wrong size for the room?
The room takes a long time to warm up, never quite reaches a comfortable temperature, or the radiator is hot at the top and lukewarm lower down even after bleeding. Undersized radiators are common in extensions and loft conversions where the original system was never resized for the new floor area.
Can you fit a bigger radiator without changing my boiler?
In most cases, yes. A correctly sized radiator draws more from the same system, and as long as your boiler and pump have reasonable headroom, this is a straightforward upgrade. We check system capacity as part of the survey and tell you honestly if it isn't.
What's the difference between a panel, column and designer radiator?
Panel radiators are the standard, cost-effective choice for most rooms. Column radiators give more surface area and a period look for the same footprint. Designer and vertical radiators solve tight wall space, especially in bathrooms and hallways. We advise based on the room, not just what looks best in a showroom.
Do you replace old TRVs at the same time?
We recommend it. A new radiator paired with a worn or missing TRV means you lose room-by-room control, which is most of the point of the upgrade. It's a small addition to the job and usually worth it.
Will a new radiator throw off the balance of my whole system?
It can, if it's not rebalanced afterwards — which is why every installation includes a balance check, not just a fit-and-leave. See our radiator balancing guide for what that actually involves.
Explore the cluster
Related heating services & guides
Power flushing
Whole-system sludge cleanse
Underfloor heating
Wet systems, new build & retrofit
Smart heating controls
Zoned thermostats, app scheduling
System upgrade & rebalancing
Whole-system survey and balance
Pricing
Quote-only, fixed price before we start
Areas we cover
All 33 London boroughs
Guide to central heating systems
The complete system-wide guide
Radiator balancing guide
Why some rooms run cold
London-wide
Radiator Installation across all 33 boroughs
Same multi-method kit and fixed-fee approach from Barking to Richmond. Pick your borough for local housing detail.
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Learn moreReady to sort this room out?
Tell us the room and your postcode. We'll confirm a free survey and, after that, the fixed price and earliest slot — before you commit to anything.
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