Anthracite grey windows cost roughly 10–15% more than standard white uPVC — here’s what that means in pounds.
If you are replacing windows and considering anthracite grey, the first question is usually about the price difference. Anthracite grey windows typically cost 10–15% more than equivalent white uPVC windows, adding £150 to £400 per window depending on size and opening style (FENSA, 2026; Glass and Glazing Federation, 2026).
Anthracite grey windows cost £150–£400 more per window than white uPVC, a 10–15% premium. Colour does not affect energy bills or U-values. Compare quotes from FENSA-registered installers.
- Anthracite grey costs 10–15% more than white uPVC windows.
- For a 10-window house, the premium is £1,500 to £4,000.
- Colour has zero effect on window U-values or energy bills.
- Typical double-glazed U-value is 1.2–1.4 W/m²K for any colour.
- No UK grant covers window colour — only U-value matters.
- Anthracite grey windows cost roughly 10–15% more than standard white uPVC — here's what that means in pounds.
- Anthracite grey windows save you nothing on energy bills — colour does not affect thermal performance.
- The payback on anthracite grey windows is aesthetic only — expect zero energy-bill return.
- Quick numbers – cost, colour stability, and warranty comparison for anthracite grey vs white uPVC.
- Anthracite grey windows are a colour choice, not a performance upgrade — the direct answer.
- Only use a FENSA-registered or CERTASS-accredited installer for anthracite grey windows — Building Regulations compliance is mandatory.
- Anthracite grey windows require slightly more maintenance than white — cleaning and scratch care matters.
For a typical 10-window house, the total premium for anthracite grey over white is £1,500 to £4,000. This means a full set of white uPVC windows costing £6,000–£8,000 would cost £7,500–£12,000 in anthracite grey. The exact figure depends on the number of opening casements, the size of fixed panes, and the installer’s pricing structure.
Anthracite grey windows save you nothing on energy bills — colour does not affect thermal performance.
Window colour has no measurable effect on heat loss. The thermal performance of a window is determined by the glass type, the spacer bar, and the frame construction, not the colour of the uPVC (Building Regulations Part L, 2025 edition, effective 2026).
Both anthracite grey and white uPVC windows with the same glazing achieve identical U-values. For double glazing, the typical U-value is 1.2 to 1.4 W/m²K. For triple glazing, it is 0.8 to 1.0 W/m²K (DESNZ thermal performance data, 2026). A U-value measures how quickly heat passes through the window — lower numbers mean better insulation. Because colour does not change this figure, your energy bills will be the same regardless of whether you choose grey or white.
The payback on anthracite grey windows is aesthetic only — expect zero energy-bill return.
No grant or subsidy in the UK supports choosing a specific window colour. All government energy-efficiency schemes, including the Energy Company Obligation (ECO4), base eligibility on the window’s U-value, not its colour (GOV.UK ECO4 rules, 2026). If your windows meet the required U-value standard, the colour is irrelevant for funding purposes.
The resale value uplift from anthracite grey windows is unquantified in published UK data. No official study from the Office for National Statistics, HM Land Registry, or any government body shows a measurable house price premium for anthracite grey windows over white (DESNZ Home Energy Model documentation, 2026). Estate agents may suggest grey windows look more modern, but there is no published evidence that buyers pay more for them.
Quick numbers – cost, colour stability, and warranty comparison for anthracite grey vs white uPVC.
| Factor | Anthracite grey uPVC | White uPVC |
|---|---|---|
| Typical cost per window (standard casement, 1.2m x 1.2m) | £750–£1,200 | £600–£1,000 |
| Warranty length (years) | 10–20 years (foil finish may have shorter warranty) | 10–20 years |
| Fade resistance rating (BS EN ISO 4892-2) | Pass – UV-stable to grey scale 4–5 | Pass – UV-stable to grey scale 4–5 |
| Scratch resistance | Lower – scratches show as white marks on dark surface | Higher – scratches less visible on white surface |
| Resale potential | Unquantified – no published premium | Standard – no premium or discount |
Sources: BSI standard for uPVC colour stability, 2026; GGF warranty data, 2026.
Anthracite grey windows are a colour choice, not a performance upgrade — the direct answer.
Anthracite grey is a foil-laminated or co-extruded uPVC finish that mimics the look of aluminium or slate. Foil lamination applies a coloured film to the uPVC surface. Co-extrusion bonds a coloured layer into the uPVC during manufacturing. Neither method changes the structural or thermal properties of the window (FENSA technical guidance, 2026; GGF colour finish specification, 2026).
Anthracite grey offers no thermal, security, or acoustic benefit over white uPVC of the same build. The only reason to choose it is visual preference, usually to match a grey roof, render, or aluminium bi-folds. If you want better energy performance, focus on the glazing specification and frame design, not the colour. How to choose the right window glazing for energy efficiency
Only use a FENSA-registered or CERTASS-accredited installer for anthracite grey windows — Building Regulations compliance is mandatory.
In England and Wales, replacement windows must comply with Building Regulations Part L (conservation of fuel and power). You must use an installer registered with a self-certification scheme such as FENSA or CERTASS, or notify Local Authority Building Control before work starts (GOV.UK Building regulations for replacement windows, 2026).
FENSA and CERTASS are the two main self-certification schemes for replacement windows. They check that the installation meets the required U-value standards and that the work is recorded with the local authority. If you use an unregistered installer, you may need to pay for a separate Building Regulations application, which can cost £200–£500 per installation. MCS (Microgeneration Certification Scheme) is irrelevant for windows — it covers renewable energy systems such as solar panels and heat pumps only (FENSA registration criteria, 2026).
Anthracite grey windows require slightly more maintenance than white — cleaning and scratch care matters.
Dark colours show dirt, water spots, and scratches more visibly than white. You may need to clean anthracite grey windows more frequently to keep them looking their best. Use only non-abrasive cleaners — a pH-neutral soap and water solution is recommended — to avoid damaging the foil or co-extruded layer (GGF care and maintenance of uPVC windows guidance, 2026).
Fading is minimal under normal UK conditions. Foil finishes are tested to BS EN ISO 4892-2, which simulates long-term UV exposure, and are rated to grey scale 4–5 (the highest rating for colour change) (BSI standard for colour stability, 2026). Scratches are a more practical concern — on a dark surface, a scratch exposes the white uPVC beneath, which is more noticeable than on a white window. How to clean uPVC windows without causing damage
Frequently Asked Questions
Anthracite grey windows cost 10–15% more than white uPVC, adding £150 to £400 per window. For a typical 10-window house, that is a total premium of £1,500 to £4,000, according to FENSA and the Glass and Glazing Federation (2026).
No, anthracite grey windows do not save energy. Window colour has no effect on thermal performance — the U-value is identical to white uPVC with the same glazing, as confirmed by Building Regulations Part L (2025 edition, effective 2026).
The U-value depends on the glazing, not the colour. For double glazing, it is typically 1.2–1.4 W/m²K; for triple glazing, 0.8–1.0 W/m²K (DESNZ thermal performance data, 2026). Anthracite grey and white windows with the same glazing have identical U-values.
No, no UK grant supports a specific window colour. Schemes like ECO4 base eligibility on U-value standards, not colour (GOV.UK ECO4 rules, 2026). You can get funding for energy-efficient windows regardless of colour.
No, anthracite grey uPVC windows require the same maintenance as white. Both are made from the same material and only differ in colour. Cleaning with soapy water is sufficient for both.
