Everest double glazing windows review (now part of Anglian Home Improvements)

Everest, now part of Anglian Home Improvements, is one of the largest and most popular double glazing windows installers in the UK. The company designs, manufactures, retails and installs its own products in the UK, and it serves most of the country including Jersey.

Everest offers a range of customisable replacement windows, including uPVC, timber and aluminium frames in a number of styles: sliding sash, bay, tilt and turn and casement. The company also offers a range of opening styles, glass finishes (including double and triple glazing), colour options and decorative glass finishes, and each unit incorporates locks accredited by Secured by Design, the police standard for security products. 

Everest backs the quality of its products with comprehensive warranties, including a lifetime warranty that comes at an extra cost.

Key features

Everest offers a choice between uPVC, sustainably sourced timber and aluminium windows, all designed and manufactured in-house. In addition to double glazing, frosted glass, noise-reducing glass and safety glass, Everest also enables you to upgrade to triple-glazed glass for maximum energy efficiency. Secondary glazing is another option which provides discreet insulation.

• Guarantee options: 10-year standard guarantee, and 20-year guarantee for uPVC Exclusives which covers discolouration of white uPVC frames, condensation and fogging. Lifetime guarantees can also be purchased. Timber windows come with a 30-year guarantee against rot and fungal growth. The colour finish and profile of aluminium windows are covered by an additional 25-year guarantee.
• Price range: From £280 to £1,260 per window, depending on the style and material.
• Energy efficiency rating: Depends on frame material and window style. Maximum energy efficiency rating of A++ on triple-glazed uPVC casement windows.
• Secured by Design (SBD) rating: SBD accredited.

The high upfront windows costs mean replacing them is a big decision, so we recommend considering the pros and cons of every company on the market to make sure you’re choosing the best one for your household.

Here are some of the advantages of buying Everest replacement windows:

• Energy efficiency: Many Everest windows are A-rated, though some timber and aluminium styles have a B rating. With triple glazing, Everest’s uPVC range is rated an impressive A++.
• Warranties: Everest windows come with a 10-year standard guarantee on all parts and materials. uPVC Exclusives are covered by a generous 20-year guarantee, which comes free of charge. You can also opt to purchase a lifetime guarantee for complete peace of mind, which can be transferable.
• Window styles: Everest offers an impressive range of different window styles, materials and colours so there’s plenty of choice to suit every home.
• Noise reduction: You can opt to buy Everest’s noise-reducing glass if you live in an area with a lot of noise pollution. This glass disrupts soundwaves by using two panes with different thicknesses. It also features a laminate PVB sound-dampening core.
• Safety: Everest windows are SBD-accredited, and come with impressive locking systems like GrabLock, which has been developed with Yale.

Also consider Everest’s disadvantages:

• Cost: Everest windows are more expensive than many of the other brands we’ve reviewed.
• Mixed reviews: As of January 2026, the company is rated 2.9 stars out of 5 on Trustpilot, ranking it as an “Average” company. Everest has 70 per cent of 5-star reviews and 18 per cent of 1-star reviews, so people’s experience with the company seems polarised.
• Limited finance options: Everest’s only finance options are personal loans or secured lending via Kandoo, a credit broker and comparison service, offering interest rates of 4.25 per cent APR, and fixed at 9.9 per cent APR representative. Some other companies also offer “buy now, pay later” and flexible monthly payment schemes.

How do Everest double glazing windows work?

You’ll kickstart your window project with a design visit from a consultant, who will talk through your options and provide an obligation-free quote. Next, a surveyor will check that all the measurements are correct and confirm whether the installation can go ahead safely. Your order will then be placed, and your windows will be manufactured in the UK. Once this is completed, Everest will contact you to book an installation date. Installers will come out on the day as agreed, proceed with your installation, and clean everything up once they are done, which could take a couple of days depending on the number of windows to fit.

After your installation, you’ll receive a guarantee pack and a FENSA certificate to protect your new windows.

Everest doesn’t publish the cost of its windows online as they are made to measure. Pricing is affected by material, size, accessories and glazing options. According to our research, you can expect to pay the following:

Everest provides high-quality replacement windows and frames to customer specifications, but the company’s high prices may put some buyers off.

If you are looking for something equally reliable but a little cheaper, you should consider Anglian, which now owns and operates Everest. The company’s warranties aren’t as attractive as Everest, but it does offer a standard 10-year warranty on all parts and labour and a 15-year guarantee on gas-filled windows. They also offer a range of designs and colours, and all uPVC windows are A++ energy efficient.

Important note: Anglian now owns both the Everest and Safestyle brands, along with the order books and other company assets.

Everest advises that windows should be cleaned twice a year in normal conditions. If you live in a coastal area or near a construction site, clean your windows more regularly. To clean your windows, use a commercial cleaning solution and soft cloth, taking care to avoid contact with the frames. Harsh steel wool and abrasive cleaners can scratch the window frames.

Wooden frames require extra care. They need to be sanded and repainted periodically, and you should avoid getting them too wet during cleaning. Any exposed wood should be treated with an appropriate product, such as wood oil, to preserve its integrity, and interior woodwork can be polished with beeswax and a soft cloth. 

“Had four companies to quote. 3 very similar in that they didn’t really understand our needs.

However Everest went to great lengths to show me the window. They advised what window was needed for each room. Talking about north or south facing and which rooms we spend the most time. They offered real advice for our need. Paid a little more but worth it for value for money.”

• Carlton Jones, January 2026, via Trustpilot

“Do not touch this shower if you are looking for timber windows. They advertise that they do them and then in our case took 6 months doing precious little with next to no communication and they haven’t even got around to starting to make the windows. On top of that when I lost all patience and asked to cancel they stated that I needed to pay them a further £1200 on top of the £999 deposit I already paid.”

• Morgan Hicks, January 2026, via TrustPilot

Everest is a leading window supplier in the UK, offering impressive guarantees, excellent energy efficiency ratings and highly secure Yale GrabLock systems. Despite a period of difficulty in 2020 and again in 2024, when the company went into administration, it still maintains various industry accreditations. Trustpilot reviews are mixed, but there are many more positive reviews than negative ones.

Everest’s generous warranties are a standout feature of this brand, as many of its competitors cannot match them. You can even choose to pay an extra fee for the lifetime warranty, which can be transferred should you sell your house.

The price of Everest windows is high compared to other window companies in the UK, and its choice of finance options is limited. However, it’s a good choice if your budget stretches that far, as the service it provides is second to none.

Methodology

To compile this Everest windows review objectively, we read professional and customer testimonials, technical documentation, brochures and forums. We then assessed the brand against the factors customers care about most, including:

• The type of double glazing material (uPVC, wooden, aluminium);
• The number of styles on offer;
• The energy efficiency rating held by the company;
• The level of security offered;
• The warranty period;
• The company’s years of experience;
• The number of payment options;
• The total rating score of the company held on Trustpilot; and
• Additional benefits (including FENSA certification, design options, customer support and the inclusion of trickle vents).

Read more about how we review windows.