Everest is one of the UK’s most recognised double glazing brands, with over 60 years of history and a product range that includes triple glazing as standard on casement windows. But the company has entered administration twice since 2020 and is now owned by the same parent as Anglian and Safestyle. Its Trustpilot score sits at 2.9/5 – among the lowest of any major UK installer.
We reviewed Everest’s pricing, products, guarantees, accreditations, and customer feedback to give you an honest verdict. This review reflects Everest’s current status under ASHI Group / Anglian ownership as of February 2026.
Everest scores 6/10 in our review – strong products and accreditations let down by two administrations, a 2.9/5 Trustpilot rating, and aggressive commission-based sales tactics.
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- Everest uPVC casement windows cost £700–£1,800 per window installed - premium pricing at 20–45% above local FENSA installers for equivalent specifications
- The 7-Day Price Promise guarantees they’ll match any like-for-like competitor quote - get quotes from two local FENSA installers first, then present them to Everest
- 20-year guarantee is a genuine differentiator - most local installers offer 10 years, and Everest’s company size means the guarantee is more likely to be honoured
- High-pressure sales tactics remain a consistent complaint - initial quotes are typically inflated by 30–45%, with “discounts” applied during the sales visit
- Best for homeowners who value brand reputation and long guarantees - but cost-conscious buyers will almost always find better value from rated local installers
How Much Do Everest Windows Cost?
Everest windows cost £700-£1,800 per uPVC casement window installed, with premium styles reaching £3,600 – but sales reps routinely inflate initial quotes by up to 45%.
Everest doesn’t publish a fixed price list – all quotes require a home survey. However, their own cost guides indicate the following ranges (all include supply and professional installation):
| Window Type/Material | Price Range | Premium vs uPVC Casement |
|---|---|---|
| uPVC casement | £700-£1,800 | Baseline |
| Grey or woodgrain uPVC | £770-£2,070 | +10-15% |
| Tilt and turn | £875-£2,250 | +25% |
| Sash (sliding) | £1,050-£2,700 | +50% |
| Bay window | £1,400-£4,500 | +100-150% |
| Aluminium | £875-£2,250 | +25% |
| Timber | £1,050-£2,700 | +50% |
In January 2025, Everest warned of an 8.9% price increase across all products, citing the October 2024 Budget’s National Insurance rises. Adding triple glazing costs 10-20% more than double glazing. For bay windows, Everest prices range from £1,400–£4,500 for a bay window installation. Secondary glazing is up to 50% cheaper than full replacement.
A note on Everest’s sales tactics: Everest uses commission-based salespeople who are known for inflating initial quotes. Multiple sources report that customers negotiate discounts of up to 45% from the first price offered. Never sign on the first appointment, and always get two competing quotes from independent installers before engaging.
- Everest's 7-Day Price Promise guarantees — they'll match any like-for-like competitor quote within 7 days
- get quotes from two local FENSA installers first — then present them to Everest
Products and Energy Efficiency
Everest offers uPVC, aluminium, and timber windows with triple glazing as standard on casements – achieving an A++ energy rating and a U-value of 1.0 W/m²K on flush casement models.
Everest’s product range is broader than most national installers. They offer casement, flush casement, sash, tilt-and-turn, bay, and bow windows in uPVC, aluminium, and timber frames. The standout feature is triple glazing offered as standard on casement and flush casement windows – most competitors charge extra for this.
Triple-glazed uPVC casement windows achieve an A++ energy rating with a U-value of 1.0 W/m²K, which is the top of the BFRC (British Fenestration Rating Council) scale. Everest claims to be the “first mass-market seller of triple glazing” in the UK, and their triple glazing is marketed as being 2.5 times more efficient than old double glazing.
Customisation is extensive: 25+ colour options, multiple glass finishes (obscure, decorative, security, self-cleaning, anti-sun), and 787,000 claimed combinations. All products are manufactured in-house in Britain – though the factory location has changed from Treherbert, Wales (closed April 2024 after 52 years) to Anglian’s facilities in Norfolk.
Beyond windows, Everest also sells composite doors, uPVC doors, bi-fold doors, patio doors, French doors, conservatories (lean-to, Edwardian, Victorian, orangeries), roofline, and garage doors.
Guarantees and Warranty
Everest offers a 10-year standard guarantee with insurance backing, a 20-year guarantee on the uPVC Exclusives range at no extra cost, and a 30-year rot guarantee on timber frames.
Everest’s guarantee structure is tiered by product:
| Product | Guarantee Length | Covers |
|---|---|---|
| Standard (all products) | 10 years | Parts, materials, faulty workmanship, condensation between panes |
| uPVC casement (extended) | 15 years | Condensation and fogging on sealed units |
| uPVC Exclusives range | 20 years | Discolouration and fogging (no extra charge) |
| Timber frames | 30 years | Rot (with proper maintenance) |
| Lifetime option | Your lifetime | Fogging (paid upgrade, not transferable) |
All guarantees include insurance backing up to £50,000, which covers repair or replacement if Everest ceases trading. Given that Everest has entered administration twice (2020 and 2024), this insurance backing is particularly important. The guarantees transfer to new owners on property sale – though the lifetime option converts to a 20-year guarantee from the original installation date.
Accreditations include FENSA, TrustMark, GGF membership, Secured by Design, BBA (3 certificates), 10 BSI Kitemarks, Made in Britain, BFRC, and Recovinyl. The 10 BSI Kitemarks cover product standards across uPVC profiles, security glazing, insulating glass units, and environmental management (ISO 14001).
Customer Reviews: What Do Buyers Say?
Everest has a 2.9/5 Trustpilot rating from 13,392 reviews – highly polarised with 70% giving 5 stars but 18% giving just 1 star, reflecting inconsistent installation quality and poor after-sales service.
Everest’s Trustpilot profile tells a story of extremes. The headline score of 2.9/5 from 13,392 reviews masks a deeply polarised picture: approximately 70% of reviewers give 5 stars, while 18% give just 1 star. Very few people land in the middle.
What positive reviewers say: installation teams are professional and courteous, product quality and thermal efficiency improvements are noticeable, and fitters clean up well after themselves. When Everest gets it right, the result is genuinely good.
What negative reviewers say: poor communication with missed appointments and no notice, unresponsive customer service after installation, mid-project price increases (variation orders of up to £6,000 reported), long delays beyond quoted timelines (8 weeks promised, 17 weeks delivered in one case), difficulty making warranty claims, and slow refund processing (21-28+ days).
The pattern suggests that Everest’s products are solid, but their outsourced installation network delivers inconsistent results. When your specific installation team is competent, you get a 5-star experience. When they’re not, the centralised customer service team often struggles to resolve issues promptly.
Everest’s Administration History
Everest went into administration in 2022 but was acquired by Anglian Home Improvements. They now operate as a separate brand under Anglian ownership, which has improved their supply chain and installation standards.
Everest has entered administration twice – in June 2020 during COVID and again in April 2024 – before being acquired by ASHI Group (Anglian’s parent) for its brand, IP, and customer order book.
Everest’s financial history is a red flag that buyers should understand:
June 2020: Everest Limited entered administration during the COVID pandemic. Private equity firm Better Capital (95% shareholder) restructured the business as Everest 2020 Limited via a pre-pack administration deal.
April 2024: Everest 2020 Limited entered administration again. The Treherbert factory in Wales – which had been manufacturing Everest products for 52 years – closed, with approximately 100 jobs lost. Administrators from ReSolve were appointed.
May 2024: ASHI Group Limited (the parent company of Anglian Home Improvements) acquired Everest’s brand, intellectual property, and customer order book. The deal was completed on 23 May 2024. Everest now operates from Anglian’s headquarters in Norwich, Norfolk.
The ultimate owner of ASHI Group is Alchemy Partners, a London-based private equity firm specialising in distressed debt and turnarounds. Alchemy first invested in Anglian in 2001 and is reportedly exploring a sale of the group, with the business estimated at over £100 million. This creates a secondary risk: if ASHI Group changes hands again, warranty continuity and brand direction could shift.
Everest vs Anglian vs Safestyle
Everest, Anglian, and Safestyle are all owned by the same parent company (ASHI Group) – so comparing quotes between them does not give you genuine price competition.
Since May 2024, Everest, Anglian, and Safestyle have all been owned by ASHI Group. They still trade as separate brands but share the same parent company and headquarters. Here’s how they compare:
| Feature | Everest | Anglian | Safestyle |
|---|---|---|---|
| Price tier | Mid-premium | Mid-range | Budget-to-mid |
| Materials | uPVC, aluminium, timber | uPVC, aluminium, timber | uPVC only |
| Triple glazing | Standard on casements | Available (extra cost) | Available (limited) |
| Trustpilot | 2.9/5 (13,392) | 3.9/5 (38,656) | 3.5/5 (48,624) |
| Guarantee | 10-20 years | 10 years | 10-15 years |
| Timber rot guarantee | 30 years | 30 years | N/A (no timber) |
| BSI Kitemarks | 10 | Multiple (no count published) | Not published |
| Administration | 2020, 2024 | Never | 2023 |
If you’re comparing national brands, getting a quote from all three gives you three prices from the same parent company. For genuine competition, always include at least one quote from a truly independent installer. See our best double glazing companies guide for alternatives.
How to Get the Best Deal from Everest
Never sign with Everest on the first appointment – get two independent quotes first, then use Everest’s 7-Day Price Promise to leverage a match or beat.
Everest’s commission-based sales model means the initial quote you receive is almost certainly inflated. Here’s how to negotiate effectively:
1. Get independent quotes first. Before booking an Everest survey, get written quotes from two local FENSA-registered installers for the same spec (frame material, glazing type, size, colour). This gives you leverage.
2. Ignore “today only” discounts. Everest salespeople are trained to close on the first appointment. The ASA ruled against Everest’s “Up to 40% OFF” claims in 2020, finding the company had been running a continuous “sale” that made the discounted price effectively the real price. The discount will still be available next week.
3. Use the 7-Day Price Promise. Everest guarantees they won’t charge more than a competitor’s like-for-like quote (same style, material, size, quantity) within 7 days. Present your independent quotes and request a formal price match.
4. Compare finance carefully. Everest offers finance via Kandoo at a representative 11.9% APR. Always compare this with your bank’s personal loan rates or a 0% credit card before accepting in-store finance.
Our Verdict
Everest earns 6/10 – excellent products and accreditations undermined by two administrations, a 2.9/5 Trustpilot rating, PE ownership risk, and sales tactics that require buyer vigilance.
Excellent products and accreditations undermined by two administrations, a 2.9/5 Trustpilot rating, and aggressive sales tactics
FREE QUOTE COMPARISON
Compare Double Glazing Quotes from Trusted Suppliers
✓ Save up to £400 per window
100% free • No obligation • Takes under 2 minutes
Everest makes genuinely good windows. The triple glazing, the 10 BSI Kitemarks, and the breadth of the product range are hard to fault. But the business behind those windows has failed twice in four years, and its Trustpilot profile suggests that product quality doesn’t always translate to consistent installation and aftercare.
If you choose Everest, go in with your eyes open: get competing quotes first, never sign on the first visit, and verify that your specific installation team has strong recent reviews. The products justify consideration; the process requires caution.
