Disclosure: FMB Home Picks is committed to delivering independent advice and reviews on home products and services. When you purchase through links on our site, we may earn an affiliate commission.Learn moreContact us.
Our guide highlights the top double glazing companies in the UK, offering insights into costs, benefits, and everything you need to know about installing double glazing in your home.
As the weather is getting colder in the UK, you may be one of many homeowners searching for ‘double glazing window companies near me’ and being met with thousands of results. To save you spending hours weeding out the good from the bad and the good from the great, we’ve done the heavy lifting for you.
In this guide, we’ve shortlisted the best double glazing installers in the UK, comparing their reputation, window prices, customer service and product quality to help you keep your house warm and insulated and your energy bills low.
These installers not only provide high quality, durable windows and installation but also enhanced security features, energy efficient solutions, and competitive windows prices. They back their work with reliable warranties, ensuring long-term satisfaction.
To get a free double glazing quote fast, simply provide your details below and we will connect you with the top local installers in your area. This ensures you receive the best service and value from trusted professionals.
Request windows quotes by answering a few simple questions
Get free, no obligation windows quotes from up to 5 installers near you
Compare quotes to get the best price on your installation
To find the best window installers in the UK, we carefully evaluated dozens of providers, comparing their prices, products and warranties. We assessed their selection of window materials, styles, and additional features, as well as their recent customer reviews and feedback on Trustpilot.
From our hours of research, we compiled a list of the top double glazing installers in the UK.
| Anglian | Britelite | Britannia | Crystal | CR Smith | |
|---|---|---|---|---|---|
| Approximate price range per window | £275 – £1,000 (price match on uPVC windows) | From £550 | £300 – £750 | From £330 | £400 – £1,200 |
| Trustpilot score | 3.9 stars | 4.6 stars | 4.1 stars | 4.7 stars | 4.9 stars |
| Areas covered | Nationwide | South East | Southern England | South East | Scotland |
| Warranties | 10-year guarantee for all parts and labour; 10-15 years for sealed glass units | 10-year transferable guarantee | 10-year transferable guarantee | 10-year guarantee | 10-year guarantee |
| Available materials | uPVC, aluminium, timber | uPVC, aluminium | uPVC, aluminium | uPVC | uPVC, timber |
| Energy rating | A++ for uPVC; A for timber and B for aluminium | A+ for uPVC and aluminium | A++ for uPVC and aluminium | A+ | A |
| Secured by Design certified | Yes, on some products | Yes, on some products | Yes | Not currently accredited | Yes |
Get windows quotes in your area
Discover how much new windows would cost for your home by answering a few quick questions
Different window companies offer varying warranty terms. The shortest warranty featured in this guide is 10 years, which is roughly half the average lifespan of uPVC double glazing.
The dimensions and frame materials you choose all influence the cost of double glazing windows. On top of that, each provider prices their products differently. It’s worth noting there is help to cover the cost of windows in the shape of double glazing government grants.
As well as increasing your property’s value, double glazing can enhance the energy efficiency of your home. Replacing your windows can save you up to £235 a year on your energy bills, depending on the energy efficiency of the windows you choose.
The companies we selected install double glazed windows accredited by Secured by Design (SBD), which means they meet police-approved security standards.
Anglian’s energy-efficient windows come in a range of styles and materials, including wood and aluminium. The company also provides uPVC windows, which are available in several finishes. Decorative glass options and advanced safety features – such as key locking handles, multipoint locks, excluder devices and shoot bolt locks – are also available.
In the 1960s, the company was founded as Anglian Windows, and it has since become a market leader. Anglian fits more than half a million products in the UK every year, all bearing the Made in Britain trademark. Prioritising economic and environmental sustainability, the company takes part in the Recovinyl Plus PVC recycling initiative, offering you up to £1,000 off new Anglian windows and doors when you recycle your old ones.
Anglian’s fair payment options, impressive accreditations and glowing reviews earned it excellent marks for its double glazing products and services. The company provides windows in various styles, including tilt and turn windows, casement, sash, flush, bay and cottage. A range of Scandinavian-inspired styles and colours is also available, including uPVC frames with wood finishes.
Like many double glazing companies, Anglian doesn’t publish its prices as each installation is tailored to the customer. The company does offer a price-match guarantee on uPVC windows, providing a like-for-like quote is presented.
Per our research, the average cost of a 600mm x 900mm window from Anglian is as follows:
| Material | Cost |
|---|---|
| uPVC | £275 – £630 |
| Aluminium | £525 – £675 |
| Composite | £600 – £685 |
| Wood | £890 – £1,000 |
As of February 2026, Anglian’s Trustpilot score stands at 4.0 out of 5 stars from over 38,000 reviews.
The company does have a mixed reputation, which is visible in the reviews. While many customers praise the wide range of window styles, the quality of the products, and professionalism of installers, common complaints revolve around communication issues and pushy sales tactics. There are also reports of missed appointments and difficulty getting in touch with the company to fix issues. Despite the mixed feedback, Anglian remains a popular choice due to its strong market presence.
Anglian’s beautifully designed bespoke products come in an wide variety of styles. However, although the company provides some financing options, some of its competitors have a more favourable annual percentage rate (APR) than Anglian’s 12.9 per cent. Some brands such as Britannia also offer interest-free credit and buy now, pay later plans. As such, we’d recommend Anglian for cash buyers.
Anglian’s safety features, especially its locking systems and highly-coveted Secured By Design (SBD) accreditations, are ideal if you’re concerned about security. The company’s wood windows and doors also hold several accreditations and licences, including Forest Stewardship Council certifications. Anglian’s quality products, accreditations, market presence and solid guarantees led us to choose this installer as the overall best double glazing company.
Read our full Anglian windows review.
With over 50 years in the double glazing industry, Britelite Windows focuses on energy efficiency and security, as demonstrated by its proprietary 10-point lock system and the fact that some of its products are SBD accredited.
We included Britelite in our shortlist mainly thanks to its transparent price policy, as all of its quotes include VAT and fitting costs, so there are no hidden fees.
Many online reviews suggest Britelite’s prices are more affordable than those of its competitors, and customers have also reported that their installation resulted in impressive energy savings. The company holds the British Sustainability Institute Kitemark accreditation for window installation.
Britelite provided us with the average prices for a standard casement window (excluding installation and labour):
| Material | Average cost |
|---|---|
| uPVC | From £550 per window |
| Aluminium | £600 – £700 per window |
| Composite | From £1,150 per window |
Britelite receives generally positive reviews on Trustpilot, with customers commenting on its professional, polite installers, fair prices, and their overall satisfaction with the finished product. As of February 2026, its score of 4.6 starts out of 5 consists of 81 per cent of 4 or 5-star reviews. A few negative reviews report some communication issues with the Britelite sales team, but these seem anecdotal and the company replies to all of them to attempt to resolve them.
If you’re on a budget and want to avoid hidden fees, Britelite Windows is a good option. Your quote is VAT-inclusive, thanks to the company’s competitive, transparent pricing, so you won’t have to worry about additional costs when making your decision. Unlike some of its competitors, Britelite receives praise in online reviews for its straightforward sales tactics.
However, Britelite’s representative APR is 12.9 per cent, and the company doesn’t offer many payment options. The company also has less choice of materials and design features compared to competitors, and it only provides a standard 10-year warranty.
Read our full Britelite windows review.
Britannia Windows is a well-known family business that was founded in 1982. Serving customers in Kent, Sussex, Essex, Surrey and London, the company uses a network of installers to ensure quick delivery. Britannia Windows gets mixed reviews online, but it responds directly to negative reviews and has a solid reputation overall. If you’re generally busy during office hours, you may find the company’s extended contact centre service hours (Monday to Friday, 8.00am to 8.00pm) quite helpful.
If you prefer using credit, Britannia has multiple finance options and extremely flexible payment terms. The company also has an extensive range of window designs, styles and colours to choose from.
Pricing for Britannia windows is not available online, but we were able to identify a price range for their products using customer reviews. Britannia’s costs are similar to those of Anglian, and most reviewers rate Britannia’s prices as “fair” or “reasonable”.
| Material | Cost (excluding installation) |
|---|---|
| uPVC | £300 – £600 per window |
| Aluminium | £550 – £750 per window |
As of February 2026, Britannia is rated 4.1 stars out of 5 on Trustpilot with 63 per cent of 5-star reviews and 24 per cent of 1-star reviews. Satisfied customers mention the company’s great service, reporting that any of their issues were quickly rectified. Negative reviews mention missed installation appointments, delayed installations and difficulties getting in touch with customer service.
Many homeowners rely on payment plans as new windows are a significant investment. Britannia Windows is a good option for such buyers, as they can take advantage of low-cost monthly financing – a buy now, pay later repayment scheme with 19.9 per cent APR, or a 5 or ten year repayment option with an APR of 11.9 per cent.
With showrooms in convenient locations around South East England, Britannia has a reputation for friendly service and efficient installation, making it a solid all-round option. Although it’s a smaller business than some of the others on our list, Britannia still boasts an impressive range of window designs and colours.
Read our full Britannia Windows review.
Crystal Windows is a privately-owned double glazing company based in Essex. It operates in the South East of England including Essex, Epping and Hertfordshire, and has carried out over 90,000 installations since its inception in 1995.
The company only offers uPVC windows, either casement, tilt and turn or bay and sliding sash windows. All windows are backed by a 10-year guarantee, which is standard for the industry.
While Crystal Windows isn’t accredited by Secured by Design, it is a member of other governing bodies such as FENSA and certified by the HIES Consumer Code for renewable energy installation protection.
While they’re not readily available online, based on online comparison sites, we were able to compile the following estimate prices for Crystal windows.
| Material | Cost (excluding installation) |
|---|---|
| uPVC | £330 – £700 per window |
As of February 2026, Crystal Windows is rated 4.7 stars out of 5 on Trustpilot, with 77 per cent of 5-star reviews and just 6 per cent of 1-star reviews. The many satisfied customers call out the quality of the windows installed and the professionalism of fitters, while very rare negative reviews mention pushy sales tactics.
If you’re in Essex or Hertfordshire, Crystal Windows is an excellent installer with a reputation for providing a great service. Their windows are manufactured in the UK and, according to customer reviews, of very high quality.
Read our full Crystal Windows review.
CR Smith is an established Scottish home improvement business with over 50 years of experience delivering windows and doors. The company manufactures double glazing windows in its own manufacturing plant and installs them throughout Scotland, from Inverness and Aberdeen to Glasgow and Dunfermline.
CR Smith provides a premium service, with home design visits available as well as virtual design appointments so you can create a solution you love. It offers timber and uPVC frames in styles varying from tilt and turn to casement and sliding sash windows, all of which are covered by a 10-year guarantee on the product, parts and workmanship.
CR Smith doesn’t disclose the price of its windows, but we were able to find out the following estimates from online reviews.
| Material | Cost (excluding installation) |
|---|---|
| uPVC | £400 – £800 per window |
| Timber | £600 – £1,200 per window |
As of February 2026, CR Smith is rated an impressive 4.9 stars out of 5 on Trustpilot from over 5,700 reviews, with 90 per cent of 5-star reviews and less than 1 per cent of 1-star reviews. Reviews call out the professionalism of staff, the quality of the products and the efficiency of the installation.
If you’re based in Scotland, look no further than CR Smith to install your double glazing. The company is simultaneously large enough to have built a great reputation, but also offers a premium and tailored service to its customers.
Read our full CR Smith review.
| First Home Improvements | Safestyle | Everest | |
|---|---|---|---|
| Approximate price range per window | £400 – £700 | £350 – £1,250 | £275 – £1,220 |
| Trustpilot score | 4.6 stars | 3.6 stars | 2.9 stars |
| Warranties | 12-year guarantee | 15-year transferable guarantee | 10- to 30-year guarantee, depending on the material |
| Energy rating | A+ | A | From A++ to B depending on the material |
| Available materials | uPVC | uPVC | uPVC, aluminium, wood |
| Secured by Design certified | Not currently accredited | Not currently accredited | Yes |
| Review | First Home Improvements review | Safestyle review | Everest review |
Following Safestyle entering administration in October 2023 and Everest in April 2024, both companies are now part of Anglian Home Improvements. While all three brands continue to operate separately, they now share the same parent company.
There are plenty of horror stories online about ineffective fittings, noisy vents and property damage due to a careless new window installation, so it’s important to check out the quality of the service provided by any double glazing installer.
To get a good idea of the range of prices and products on offer, collect quotes from both national and local window installers. As most companies supply similar products, focus on each provider’s reputation and customer service when making your decision. There are some advantages to choosing a local double glazing installer, such as a friend or relative being able to share their experience with the company. However, we wouldn’t recommend accepting advice from strangers in local social media groups when it comes to choosing a window installer.
Below are some things we recommend thinking about while assessing double glazing window companies.
Look for a well-established company that has been in business for several years – the longer, the better. This is a good indicator of expertise and reliability, which are valuable during the installation process and for ongoing support.
Read all the testimonials and customer reviews you can find, and check out third-party websites. While every installer will have some negative reviews, the company’s response to such criticism can help you gauge its level of professionalism. Good aftercare service is more likely with companies that are willing to correct any issues. An argumentative or defensive response, on the other hand, may be a warning sign.
Check if local installers have photos of their completed projects available for prospective customers to look at. Local companies may even be able to tell you which houses they’ve worked on in your neighbourhood, allowing you to see the quality of the windows and installation for yourself. Visit the company’s website and look for a gallery or portfolio page, or check their social media profile.
Ensure the company is registered with FENSA, a government scheme that monitors the replacement of windows and doors in England and Wales, and compliant with building regulations. This will save you time and money, as the company will register your window installation on your behalf. You’ll also have peace of mind knowing the company has undergone thorough vetting. Once the company finishes your double glazing installation, it should provide a FENSA certificate.
Ensure that your installer provides security measures, such a multipoint lock system, to protect your home, as windows can be an easy access point for burglars.
Longer guarantee periods are better, and UK glaziers must offer a minimum 10-year guarantee on their labour and materials.
Check that the installer provides a free, no-obligation quote. While it’s common for companies to visit a home before providing a quote, they shouldn’t charge for every inspection. Transparent prices and value for money are important, so companies shouldn’t hide extra costs in the fine print.
The easiest way to get quotes from trusted companies for double glazing installations is to fill in our free online quote form. The process is simple:
We recommend seeking quotes from both national and local double glazing installers, though it’s worth noting some national companies may subcontract the job to a local installer. This will help you to compare prices, including the cost of labour.
To ensure you receive an accurate cost estimate, make sure you have the answer to the following questions ready before contacting installers.
When it comes to your installation timeline, it pays to be flexible, as double glazing companies tend to be busier at certain times of the year. As you might have to wait for your installation, the earlier you book your job, the better.
When discussing a double glazing quote, ask some questions to establish the company’s reliability and expertise. For example:
We spoke to Rebecca Orde, a Project Manager specialising in residential development; she frequently obtains quotes for double glazing windows on behalf of her clients.
According to Rebecca, it’s vital to get a detailed breakdown of what’s involved in a double glazing installation and any associated costs.
“You’ll find with most medium-sized double glazing companies that they have the software to provide really detailed quotes, including specifications such as U-value, size, material, the gas used between the panes and so on. It’s really helpful getting that in-depth overview as well as a price,” she says.
Rebecca recommends obtaining quotes from several FENSA- or CERTASS-approved installers.
“Obtaining 2 or 3 quotes from different installers is ideal for most customers, assuming you’re talking to companies of known quality,” she says.
“Sometimes, you might not receive a response from certain installers. In some locations, there’s a high demand for building work, making it a seller’s market.”
Knowing how double glazing works can be helpful when you’re looking for a company to install your windows.
Double glazed windows provide excellent insulation and effective draught prevention. They are made of 2 panes of glass separated by spacer bars filled with air or gas, allowing daylight to enter and warm your home. The heat then transforms into infrared energy that can’t escape back through the glass, similar to the greenhouse effect. This process, known as solar gain, helps reduce your energy bills and your carbon footprint by minimising the need for extra heating.
All windows have an energy efficiency rating from the British Fenestration Rating Council, which considers every component of double glazing in its assessment, including the glass used, the gas filling the spacing between panes and the manufacturing quality of the unit.
According to the latest building regulations in the UK, all new windows should be grade C or higher, but that shouldn’t be an issue as most new windows from top providers should be rated A and above.
Double glazing windows cost upwards of £500 for a single uPVC casement unit. However, the cost depends on the company you choose, the number of windows you need and the styles you prefer. As uPVC windows are made from engineered plastic, they are generally the most affordable option. The next cheapest is aluminium, and timber is typically the most expensive.1.0326
Considering the average UK property has 10 windows, these costs can quickly add up. The table below outlines the approximate costs of different materials and sizes of casement windows. On average, tilt and turn windows cost 25 per cent more than casement windows, and sash windows cost 50 per cent more.
| Casement window frame material | 600mm x 900mm | 900mm x 1,200mm | 1,200mm x 1,200mm |
|---|---|---|---|
| uPVC | £520 | £590 | £650 |
| Aluminium | £1,050 | £1,195 | £1,300 |
| Timber | £1,580 | £1,790 | £1,950 |
In this video, we explain the benefits of double glazing and the savings you can achieve by choosing it. Watch for advice on how to get financial help to pay for an installation and what to do if you need to fix or replace your windows.
Under the Consumer Rights Act 2015, double glazing companies must supply windows as described. The products must be of satisfactory quality and the installations carried out with reasonable care. If standards aren’t met, customers can request repairs or replacements. Reputable companies tend to provide warranties exceeding 10 years, but terms may vary, so always review the guarantee period before accepting a double glazing quote.
Several top UK double glazing installers – including Safestyle and Everest – have recently entered administration, creating uncertainty when it comes to the aftercare of their installations. While the Anglian group has incorporated these companies, if a company has no buyer to assume its obligations, guarantees may become void. However, you might still be able to make claims through your insurer if you have an Insurance Backed Guarantee policy.
If you’re on a budget, secondary glazing can be a more affordable option than double glazing, as it adds glazed units to existing windows. While it offers less insulation and security, it excels at soundproofing, sometimes outperforming double glazing in that regard. Most of the companies in this guide do offer secondary glazing as well as double and triple glazing.
As triple glazing is around 10 to 20 per cent more expensive than double glazing, your budget will influence which you choose. It’s worth noting that despite the higher price, triple glazing’s additional pane and air-locked spaces improve energy efficiency, can potentially increase your savings by up to 50 per cent, making it a tempting choice for homeowners seeking enhanced insulation.
To assess double glazing companies in the UK, we provide each with a score based on the following factors:
Read more about how we review windows.
