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Check the main criteria
Tell us about your household, property and its current energy rating.
Free eligibility checkNo obligationUK homeowners
Window funding available in your area — check if you qualify →
Take our free 2-minute check to see whether funding support may be available for your home. No paperwork, no obligation and no promise of something you cannot get.
Free funding eligibility check
Instant questions · around 2 minutes
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Are you the homeowner?
Funding is not guaranteed. Availability varies by scheme, area, household and property. Replacement windows are only supported in certain circumstances, and a full assessment may be required.
Clear consent2-minute checkNo obligation
Warmth
Lower U-values
Quiet
Glazing options
Finish
Frames and colour
As featured in
How the eligibility check works
Find out whether support may be available for your home
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We assess possible routes
We use your answers to look for potential support and suitable options in your area.
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Understand what comes next
If a route looks possible, eligibility still needs to be confirmed before any work begins.
Look beyond the frame colour
Ask for the U-value, energy rating and exact glazing specification.
Materials made simple
Which window frame suits your home?
There is no single best material. The sensible choice depends on your property, the look you want, how much maintenance suits you and the size of the openings.
uPVC
Practical all-rounder
Low-maintenance, widely available and usually the most affordable route.
Best for: straightforward replacement projects
Aluminium
Slimmer sightlines
Strong frames that suit larger panes and contemporary extensions.
Best for: modern homes and wide openings
Timber
Traditional character
Warm, repairable and often the most sympathetic choice for period homes.
Best for: heritage appearance and listed homes
Comfort is more than warmth
The details that change how a room feels
Heat retention
Lower U-values mean less heat passes through the whole window.
Outside noise
Glass thickness, pane spacing and seals all matter, not just double versus triple.
Daylight
Frame width and mullion layout affect how much glass, and light, you keep.
Planning your budget
What might replacement windows cost?
These broad UK ranges are a starting point, not a quote. Size, access, colour, glass, frame material and making good can move the final figure considerably.
Compare for your home| Typical project | Indicative fitted range |
|---|---|
| Single uPVC casement windowStandard size and straightforward access | £400 – £700 |
| Eight-window uPVC projectTypical mix of standard openings | £4,000 – £7,000 |
| uPVC bay windowVaries significantly by sections and structure | £1,500 – £3,500 |
| Aluminium windowStandard size; larger panes cost more | £700 – £1,200 |
Keep this list handy
Six questions that make quotes easier to compare
A cheaper headline can hide a different glass specification, less making good or a weaker guarantee.
- 01Is the quote fully inclusive of fitting, making good and waste removal?
- 02What is the U-value and energy rating of the glazing you're quoting?
- 03Who carries out the installation — employed fitters or subcontractors?
- 04How long is the guarantee, and is it insurance-backed?
- 05Are you registered with FENSA or CERTASS for building-regulation compliance?
- 06How long will the work take, and when could you start?
Replacement window questions, answered
How long does it take to replace windows?
A straightforward whole-house installation often takes two to four days. Large bays, structural work, difficult access and extensive making good can add time. Ask for the expected programme in writing before agreeing the work.
Do I need planning permission?
Most like-for-like replacements do not need planning permission. Listed buildings, homes in conservation areas and material changes to the appearance can be different, so check with your local planning authority before ordering.
What are FENSA and CERTASS?
They are government-authorised schemes whose registered installers can self-certify that replacement windows meet building regulations. Otherwise, building control approval may be needed. Ask how your installation will be certified.
Is triple glazing always better than double glazing?
Not always. Triple glazing can improve thermal and acoustic performance, but it costs more and is heavier. Compare whole-window U-values and consider whether other parts of the home are a bigger source of heat loss first.
Do your homework
Straight-talking window guides
See if you may qualify for support
Complete the free initial check. There is no obligation, and we will not tell you that funding is guaranteed.
Check my eligibilityPickwise is a comparison and enquiry service, not a window installer. Companies are independent businesses. Check the final specification, certification, insurance and guarantee before appointing any installer.
Pickwise is a comparison and research service. We are not a contractor, installer, insurer or lender. Our service is free to use; we may receive a fee from the companies we introduce you to.