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How much does it cost to replace windows with uPVC in 2026?
A complete guide to prices, measurements, opening styles, glazing, installation and the factors that affect the cost of replacing old windows with uPVC.
Replacing old windows with uPVC windows is one of the most popular improvements for homeowners who want greater comfort, lower energy losses, better sound insulation and increased property value.
However, one of the first questions when planning this improvement is straightforward: how much does it cost to replace windows with uPVC in 2026?
The answer depends on several factors. The price of a uPVC window varies with its dimensions, opening style, glazing, profile colour, accessories, the number of windows and installation conditions.
Want to know the price of your windows?
Send your window measurements and receive a personalised estimate from Caixilho PVC.
How much does it cost to replace windows with uPVC in 2026?
In Portugal, the cost of replacing windows with uPVC can vary considerably. A small bathroom window, a bedroom uPVC tilt-and-turn window, a living-room uPVC sliding window or a glazed balcony door all have different dimensions, hardware and requirements.
The final price should therefore be calculated using the actual measurements, glazing type, preferred opening style, profile colour and installation conditions.
Important: made-to-measure uPVC windows should not be assessed on the unit price alone. Understand what the quotation includes: profile, glass, hardware, transport, removal of the old frames, installation, sealing, finishing and warranties.
Why do uPVC window prices vary so much?
When searching for uPVC window prices, you will often find very different figures. This is because windows differ in size, profile, glazing, hardware and installation specification.
A complete proposal should cover not only the supply of the window but also measuring, manufacture, transport, removal of the old frames, fitting, sealing, finishing and after-sales support.
To understand the available options, visit the main Caixilho PVC uPVC windows page, which covers opening styles, profiles, glazing and how to request a quotation.
The main factors affecting your quotation
Window dimensions
The larger the window, the more uPVC profile, glass, reinforcement and hardware it will require.
Opening style
Fixed, casement, tilt-and-turn and sliding windows, as well as glazed doors, use different systems and hardware.
Double or triple glazing
Glazing affects thermal insulation, sound insulation, indoor comfort and the final price.
Colour and finish
White uPVC tends to be more economical. Special colours, textures or wood-effect finishes may increase the price.
Installation
Removing the old frames, preparing the openings, fitting, sealing and finishing all affect the cost.
Extras and accessories
Roller shutters, insect screens, handles, reinforced hardware and security solutions change the final price.
Types of uPVC windows and their effect on price
The chosen window type affects the quotation because each solution uses different amounts of material, hardware and glazing, with varying installation complexity. For a more detailed comparison, see the guide to sliding, tilt-and-turn and tilt-and-slide uPVC windows.
| Type of uPVC window | Suitable for | Effect on the quotation |
|---|---|---|
| Fixed window | Areas where an opening window is not needed | Usually more economical because there is no opening mechanism |
| Casement window | Bedrooms, living rooms, kitchens and offices | A practical, versatile solution with a good balance between price and functionality |
| Tilt-and-turn window | Homes requiring controlled ventilation | May cost more than a single-opening design, but offers added comfort |
| Sliding window | Larger openings or rooms with limited space for inward opening | The price varies with the dimensions and system used |
| uPVC glazed door | Balconies, terraces and access to outdoor areas | Generally costs more because of its size, glazing and hardware |
Double glazing, triple glazing and window performance
Glazing is one of the most important elements of a uPVC window. Double glazing for uPVC windows can significantly improve a home’s thermal and acoustic comfort, while triple glazing may be recommended for projects with higher insulation requirements.
The choice between double and triple glazing should consider the location of the home, sun exposure, external noise, façade orientation and the project’s objectives.
What should a uPVC window quotation include?
Before comparing proposals, confirm exactly what is included. A seemingly cheaper quotation may omit necessary elements.
Check whether the proposal includes:
- Measurement or technical validation of dimensions
- The uPVC profile system
- The glazing specification
- Hardware and opening mechanism
- Colour and finish
- Transport
- Removal of the old frames
- Professional installation
- Sealing and finishing
- Applicable warranties
You can also view uPVC window and door projects completed by Caixilho PVC to better understand the solutions used on site.
Is it worth replacing old windows with uPVC?
Yes, in many cases it is. uPVC windows are popular because they offer a good balance of insulation, durability, low maintenance and comfort.
Replacing old windows can help reduce draughts, heat loss, noise penetration and condensation problems, depending on the property and the installed solution.
Good window frames also contribute to a more comfortable home throughout the year, in both winter and summer. To explore this decision further, see the article on new windows and doors as a strategic investment in property value.
How should you measure windows for an estimate?
You do not need a perfect technical survey to receive an initial estimate. Approximate measurements are enough for the team to understand the scale of the project.
Useful information for requesting a quotation
- The number of windows to replace
- Approximate width and height
- Photographs of the existing windows
- Your preferred opening style
- Your preference for double or triple glazing
- Your chosen profile colour
- The installation location
- Whether you want installation included
Once you have gathered these details, you can request a free uPVC window quotation.
Made-to-measure or standard uPVC windows: which should you choose?
Made-to-measure uPVC windows
These are usually the most suitable option when replacing existing frames, because each property has its own openings, dimensions and requirements.
They provide greater control over insulation, finish, opening style, glazing and the final appearance.
Standard uPVC windows
These can be useful in some projects, but do not always fit existing openings correctly.
When the aim is to achieve good insulation, security and finishing, a made-to-measure solution tends to be more suitable.
uPVC window installation by region
The location of the work can also affect logistics, lead times and installation planning. Caixilho PVC operates in several regions of Portugal, providing uPVC windows and doors for homes, apartments, houses and professional projects.
Choose the area closest to your project
How can you avoid mistakes when comparing prices?
When comparing quotations for replacement uPVC windows, look beyond the final price. Assess material quality, glazing, installation and warranties as well.
A lower quotation may look attractive, but if it includes less efficient glazing, lower-quality hardware or poor installation, the finished result may not meet your expectations.
For a fair comparison, always request proposals based on the same information: dimensions, opening style, glazing, colour, installation and finishing.
You can also read the Aluplast vs Cortizo comparison to understand how different systems and brands can influence the choice of the most suitable solution.
Related articles to help you choose your uPVC windows
Before requesting a quotation, it may help to explore topics that directly influence window prices, comfort and durability. These guides help you compare options and make a more informed decision.
How much can you save with energy-efficient uPVC windows?
Understand how efficient windows can help reduce energy losses and improve thermal comfort at home.
Read articleDo new windows and doors add value to your home?
Find out why replacing old windows can improve comfort, energy efficiency and the perceived value of a property.
Read articleSliding, tilt-and-turn or tilt-and-slide windows?
Compare the main opening styles and find out which makes most sense for each room.
Read articleDouble or triple glazing: which should you choose?
Explore the differences between double and triple glazing for thermal insulation, sound insulation and efficiency.
Read articleGuide to uPVC window colours and finishes
Understand how the profile colour and finish can affect appearance, cost and the final result.
Read articleHardware and security for uPVC windows
Learn why hardware, locks and security systems matter to the quality of the finished window.
Read articleMaintaining and cleaning uPVC windows
Discover simple ways to keep uPVC windows in good condition and maintain their performance over time.
Read articleAluplast vs Cortizo: which should you choose?
Compare solutions, performance and features to make a better-informed decision before requesting a quotation.
Read articleSend your window measurements and receive a personalised estimate
The Caixilho PVC team will assess the measurements, opening style, preferred glazing and installation location to prepare a proposal suited to your project.
Request a uPVC window quotationFrequently asked questions about uPVC window prices
How much does a uPVC window cost?
The price depends on the dimensions, opening style, glazing, colour, hardware and installation. The best approach is to request a personalised estimate based on the actual dimensions.
Does the price of uPVC windows include installation?
It depends on the proposal. Before comparing quotations, check whether the price includes supply, transport, removal of the old frames, installation, sealing and finishing.
Are uPVC windows cheaper than aluminium?
It depends on the type of aluminium and the required insulation level. In many cases, uPVC offers very competitive value, particularly when thermal and sound insulation are priorities.
Is triple glazing worth it?
Triple glazing can be worthwhile for projects with higher thermal or acoustic requirements. However, good-quality double glazing already performs well in many homes.
How can I receive a quotation faster?
Send the approximate window measurements, photographs of the existing windows, the number of units, your preferred opening style and the installation location.
