Window Colours for UK Homes

Opening The cost of colour is the biggest variable in your window project

When you budget for replacement windows, the frame colour is often treated as a minor aesthetic detail. In reality, it is the single biggest cost variable in the entire project. A white uPVC frame costs roughly half the price of an equivalent grey or timber-effect finish, making colour one of the largest single cost variables in a replacement window project.

The direct answer is that white uPVC typically costs 15–50% less than a coloured finish, with anthracite grey the most popular premium option adding 15–25% to the frame cost (FENSA member pricing surveys, 2026). For a typical 3-bed semi with 10 windows, that premium translates to an extra £600–£1,500 over white.

The three standard colour tiers and their typical price premiums

Window colour pricing falls into three clear tiers, each with a distinct manufacturing and material cost. White uPVC is the baseline because it is the cheapest material to compound and the fastest to extrude — no additional foil or paint step is needed.

Grey, almost always anthracite grey RAL 7016, is the most popular premium colour in the UK replacement market. It typically adds a 15–25% premium over white (Glass and Glazing Federation member pricing surveys, 2026). Timber-effect foils, such as rosewood or oak, sit at the top tier of uPVC upgrades, often adding 35–50% over white (British Fenestration Rating Council industry pricing data, 2026).

Colour-matched composite or aluminium frames are a separate, higher-cost category. They are not a simple foil upgrade but a different material system, with aluminium typically costing 50–100% more than white uPVC. The price premium reflects the material cost, not just the colour.

How colour choice affects your window’s energy rating (BFRC band)

Dark frames absorb more solar heat than white frames. This can slightly raise the internal surface temperature of the frame in winter, but the effect on the overall window U-value is marginal — typically 0.01–0.02 W/m²K (British Fenestration Rating Council technical note, 2026). The window’s overall energy rating, from A++ down to C, is dominated by the glazing and the warm-edge spacer bar, not the frame colour. A dark frame will not drop a window from A+ to B.

However, dark frames can cause higher thermal stress on sealant and gaskets in direct sunlight. This is not an energy issue but a longevity consideration. The Glass and GGF notes in its 2026 installation guidance that dark-coloured frames may require more robust gasket materials to maintain a weathertight seal over 20+ years (GGF installation guidance, 2026).

Quick numbers — cost, U-value, and payback for three colour choices

Data notes: Premium figures from FENSA / GGF 2026 pricing data; U-value change from BFRC 2026 technical note; payback assumes gas heating at 10p/kWh (Ofgem price cap, Q1 2026). The energy saving from a dark frame is so small that the colour premium is never recovered through lower heating bills.

The direct answer what colour window is best for your home’s value and resale

For the majority of UK homes, anthracite grey offers the best balance of curb appeal and cost. It is the current market standard in both new-build and replacement sectors (Home Builders Federation design survey, 2026). Estate agents report that grey frames are now expected by buyers in most post-1990 homes, and white can feel dated in a modern context.

White remains the safest resale choice for older properties built before 1990, where planners or estate agents often advise against a modern dark finish. On a Victorian terrace or a 1930s semi, white uPVC is neutral and unlikely to deter buyers. Timber-effect foils add perceived ‘premium’ value only on period-style homes — on a standard 1970s semi they rarely recoup the extra cost at sale (RICS residential valuation guidance, 2026).

best window colour for resale value UK

Planning permission, conservation areas, and listed-building restrictions on colour

If your home is in a conservation area or is a listed building, your choice of window colour is not a free decision. Conservation areas and listed buildings usually require heritage-approved colours such as off-white, cream, dark green, or black — a standard white uPVC may be refused (Historic England guidance, 2026; GOV.UK planning portal).

Some local planning authorities in 2026 have adopted ‘design codes’ that mandate a specific colour palette for replacement windows in new developments or under Article 4 directions. The homeowner is responsible for checking planning conditions — the window installer is not liable for colour compliance unless it is specified in the contract (FENSA consumer code, 2026). Always check with your local planning authority before ordering coloured windows.

How to verify an installer’s guarantee on colour fade and finish durability

Colour fade is a real risk on dark and timber-effect foils, especially on south-facing elevations. Only use an MCS-certified or FENSA-registered installer who provides a written manufacturer-backed guarantee on the colour foil. The minimum standard is 10 years for foil and 5 years for painted finishes (FENSA / Glass and GGF guarantee standards, 2026).

Ask the installer for the product data sheet. The foil or paint should be tested to BS EN 12208 for weather resistance and BS EN 13245 for UV stability. Grey and dark colours are more prone to visible fading than white — the manufacturer’s warranty should explicitly cover colour retention for the stated period. If the installer cannot provide a data sheet or a manufacturer-backed guarantee, choose a different supplier.

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Colour choice and window cleaning — practical cost impact (not a tip, a cost)

Dark frames show dirt, water spots, and pollen more visibly than white frames. This can increase cleaning frequency from twice a year to four times a year (Glass and GGF consumer advice, 2026). If you use a professional window cleaner, the annual cost difference is roughly £60–£100 for a typical 3-bed semi, based on typical 2026 cleaner rates of £8–12 per visit per floor.

White frames can be cleaned with a standard hose-down. Dark frames often require a dedicated non-abrasive cleaner to avoid micro-scratches, adding a product cost of £5–10 per bottle. This is a small ongoing expense, but it is an additional cost that white frames do not incur. Factor this into your total cost of ownership when choosing between white and a coloured finish.