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Window Brands Compared — UK 2026
Compare the major UK window brands — Anglian, Everest, Safestyle and local fabricators — on U-values, WER ratings, warranty, cost and quality.
Brand Comparison Table
| Feature | Anglian | Everest | Safestyle | Local Fabricator |
|---|---|---|---|---|
| Cost per window | £600-1,200 | £500-1,000 | £400-700 | £300-600 |
| WER rating | A to A+ | A to A+ | A | A to A++ (varies) |
| U-value (double) | 1.2-1.4 W/m²K | 1.2-1.4 W/m²K | 1.3-1.4 W/m²K | 1.1-1.4 W/m²K |
| Guarantee | 10-15 years | 10-20 years | 10 years | 10 years typical |
| Profile system | Proprietary | Mixed | Industry standard | VEKA, Liniar, etc. |
| Triple glazing option | Yes | Yes | Limited | Yes (most) |
| FENSA/CERTASS | Yes | Yes | Yes | Check individually |
Choosing a Window Supplier
- Anglian — Premium national brand, wide product range, strong after-sales, highest prices
- Everest — Well-known brand, competitive mid-range pricing, established reputation
- Safestyle — Budget-friendly national option, basic specifications, value-focused
- Local fabricators — Often best value, same quality profiles, personal service, check credentials carefully
Key Tips
- Always compare U-values and WER ratings, not just brand names
- Verify FENSA or CERTASS registration (legal requirement)
- Get minimum 3 written quotes with identical specifications
- Check the actual glass specification — low-e coating, argon fill, warm edge spacer
- Beware high-pressure sales tactics with large instant discounts
Related Calculators
Use the Window U-Value Calculator to compare thermal performance, or the Window Replacement Calculator for budgeting.
Next up: related pages
How We Calculate This
Frequently Asked Questions
National companies charge a premium: Anglian quotes typically come in at £600-1,200 per window installed; Everest at £500-1,000; Safestyle at £400-700. Local FENSA-registered fabricators and installers typically charge £300-600 per window installed. Prices vary by size, style (casement, tilt-and-turn, sash) and specification. Always get 3+ quotes and compare like-for-like specifications.
Window Energy Ratings (WER) run from A++ (best) to G (worst). Building Regulations Part L 2021 requires a maximum U-value of 1.4 W/m²K or a Window Energy Rating of Band B minimum for replacement windows (AD L 2021 Table 4.2). Most quality double glazing now achieves WER A or better. Triple glazing achieves A+ or A++. Focus on the actual U-value (lower is better) rather than just the WER letter — an A-rated window can range from 1.2-1.4 W/m²K.
Not necessarily. National companies (Anglian, Everest) offer comprehensive guarantees and large marketing budgets, but their prices reflect this overhead. Local FENSA-registered installers often provide the same profile systems (Deceuninck, Liniar, VEKA) at lower prices with more personal service. Check that any installer is FENSA or CERTASS registered — this is a legal requirement for self-certification of replacement windows.
Anglian uses their own proprietary profile with Planitherm glass. Everest uses a mix of proprietary and industry profiles. Safestyle uses various industry-standard profiles. Local fabricators typically use Deceuninck (formerly Eurocell), Liniar, VEKA, Rehau or Kommerling profiles — all high-quality European systems. The profile system matters more than the brand name on the van.
For most UK homes, high-specification double glazing (U-value 1.2-1.4 W/m²K) offers the best value. Triple glazing (U-value 0.8-1.0 W/m²K) costs 20-40% more and is mainly worthwhile for Passivhaus projects, very exposed sites, north-facing elevations and noise-sensitive locations. The payback on the triple glazing premium is typically 20-30 years from energy savings alone.
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Last updated: April 2026
Verified against UK standards · estimates only, confirm with your supplier.