Double glazing cost is one of the first things homeowners want to know, and it is a fair question. New windows are a real investment, and the figures floating around online range so widely that they are not much help. This guide gives you honest, realistic 2026 price ranges for double glazing in the UK, from a single window to a whole house, and explains what actually drives the cost.
Every home is different, so treat these as guide ranges rather than a quote. The only way to get a firm price is to have someone measure up, but this will help you budget sensibly.
For a standard uPVC casement window, supplied and fitted, you are typically looking at somewhere between 400 and 900 pounds per window as of 2026. Smaller windows sit at the lower end, while larger or more complex ones cost more.
The material makes a big difference to the double glazing cost:
These are supplied and fitted figures. Prices vary with size, style, glass specification and your particular home, so always get a quote before budgeting firmly.
Most people replace windows in bigger batches, and this is where you often get better value per window. As a rough 2026 guide for uPVC double glazing:
Add doors, bay windows or aluminium frames and the figure rises accordingly. A single bay window, for example, costs more than a standard casement because it is effectively several windows joined together.
Again, these are ballpark ranges. Your actual double glazing cost depends on the number and size of windows, the styles you choose and the condition of the existing openings.
Understanding the main cost factors helps you see where your money goes and where you can flex the budget.
As above, uPVC is the most affordable, aluminium sits in the middle to upper range, and timber is usually the priciest. This is the single biggest factor in most quotes.
A simple fixed or casement window is the cheapest to make. Sash windows, bay and bow windows, and shaped or arched windows all cost more because of the extra materials and labour involved.
Standard double glazing is the baseline. Upgrades such as triple glazing, toughened or laminated safety glass, acoustic glass for noisy roads, and self-cleaning coatings all add to the cost but can be well worth it depending on your home.
Bigger windows use more glass and frame, so they cost more individually. That said, doing several windows at once usually brings the price per window down compared with one-off jobs.
If the existing frames come out cleanly, fitting is straightforward. If there is rot, damaged brickwork or awkward access, the labour goes up. Older York properties sometimes throw up surprises that a proper survey will pick up.
For most homes, yes. Beyond the comfort of a warmer, quieter house, modern double glazing cuts heat loss, which shows up on your energy bills over time. It also improves security and can add to the appeal of your home when you come to sell.
If your current windows are only a few years old but suffering from misting, draughts or a broken lock, it is worth knowing that a repair is sometimes the smarter spend. Our team handles window and door repairs too, and we will tell you honestly when a fix beats a full replacement.
Online ranges only get you so far. Because every home and every window is different, the reliable way to know your double glazing cost is a proper measured survey and a written quote. That removes the guesswork and means no surprises later. You can request a free quote and we will come out, measure up and talk through the options with no pressure.
As a rough 2026 guide, expect around 3,000 to 6,500 pounds for a terraced house, 5,000 to 9,000 pounds for a semi and 8,000 to 15,000 pounds or more for a detached home in uPVC. Aluminium and timber cost more. A survey gives you a firm figure.
A standard uPVC casement window, supplied and fitted, typically costs between 400 and 900 pounds in 2026. Aluminium and timber cost more, and larger or more complex windows sit at the higher end. Prices vary, so get a quote.
uPVC is cheaper, usually by a fair margin. Aluminium costs more but offers slimmer frames, extra strength and a modern look. Which represents better value depends on the style you want and how long you plan to stay in the home.
Modern double glazing reduces heat loss compared with old or single glazed windows, so it typically helps lower heating bills over time. The exact saving depends on your current windows, your home and how you heat it, so treat it as a long term benefit rather than an instant one.
Want to see the full range and start planning? Download our latest brochure, or book a free, no obligation quote and we will give you a proper price for your home.