Getting a few quotes is the smart way to buy windows, but the cheapest number on the page is not always the best deal. To compare fairly and land the best double glazing prices, you need to look past the headline figure at what is actually included. Here are five things worth checking in every quote before you sign anything.
1. Is it a like-for-like comparison?
The most common trap is comparing quotes that are not for the same thing. One firm might price uPVC casements, another slim aluminium frames, and a third might include a bay window in the count. Before you compare prices, make sure each quote covers:
- The same number and size of windows
- The same frame material and style
- The same glass spec (Low-E, toughened where needed, warm-edge spacers)
- The same colour or finish
Once you are comparing like for like, the numbers suddenly mean something. It is the only fair way to judge value.
2. What is the glass and frame spec?
A low price often hides a lower spec, so dig into the detail. Ask what U-value or energy rating the windows carry, whether the glass has a Low-E coating, and whether the spacer bar is a warm-edge type. These affect how warm your home stays through a Yorkshire winter and how much you save on heating.
On the frame side, check the material and whether the colour or woodgrain finish you want is included or costs extra. A cheap quote with a poor spec can cost you more in heating over the years than a slightly dearer window that keeps the warmth in. Our uPVC windows in York pages explain the specs we fit, which gives you a benchmark to compare against.
3. Is fitting and making good included?
Supply-only prices look cheaper because they leave out the labour. A proper quote should spell out that fitting is included, along with the finishing touches that are easy to forget:
- Removing and disposing of the old windows
- Sealing and making good around the new frames
- Any plastering or trims needed inside
- Cleaning up and taking away the waste
If a quote is vague about who does the fitting and what "making good" covers, ask. Hidden extras here are where a tempting price quietly climbs.
4. What guarantee and registration comes with it?
A window is a long-term buy, so the guarantee matters. Check how long both the windows and the installation are covered for, and what the guarantee actually includes. A ten-year guarantee that covers the sealed units, the frames and the fitting is worth more than a headline number with lots of exclusions.
Also check the work will be registered so it meets Building Regulations, which is normal for replacement windows. Rules can change, so it is worth confirming the current requirements or asking the installer to explain how they handle it. It is also reassuring to know they offer window and door repairs if anything needs attention later.
5. Who are you actually buying from?
Behind every quote is a company, and it pays to know who they are. Look for a local firm with a real address and a track record, rather than a hard-sell operation. A few quick checks help:
- Read their customer reviews to see how past jobs went
- Check they cover your area on their areas served page
- See how long they have been trading and whether they are local to York
A friendly local installer who will pop back if there is a snag is worth a lot more than a slightly cheaper deal from a firm you cannot reach afterwards.
Rough 2026 prices
Prices vary with material, size, glass and how many windows you do at once, so treat these as broad 2026 guides. A supplied and fitted uPVC casement window often lands around 400 to 800 pounds, and a full house of windows can run into several thousand depending on the count and spec. For a clear, itemised figure, request a free quote and we will measure up and explain every line.
FAQs
How do I compare double glazing quotes fairly?
Make sure each quote covers the same number, size, material and glass spec, then compare. A like-for-like comparison is the only way to judge which offers the best double glazing prices.
Why are some double glazing quotes so much cheaper?
A low price often means a lower spec, supply-only pricing, or extras left out like making good and disposal. Read the detail before assuming a cheap quote is the best value.
What should a double glazing quote include?
It should list the windows, sizes, material, glass spec, fitting, removal and disposal of the old units, making good, the guarantee and confirmation the work meets Building Regulations.
Is a longer guarantee always better?
Not on its own. Check what the guarantee actually covers, including the frames, sealed units and the fitting, rather than just the number of years.
How much does a full house of double glazing cost in 2026?
It varies a lot with the number of windows and the spec. As a rough 2026 guide, expect a full house to run into several thousand pounds. Get an itemised quote for an accurate figure.
Want to see the full range of styles and finishes before you compare quotes? Download our latest brochure, or request a free quote and we will pop out for a look.