Double Glazing Prices in London

Double glazing in London starts from £210. A standard window retrofit in London averages £487. Prices include VAT. Double glazing installations must comply with Building Regulations Part L (conservation of fuel and power) and may require FENSA or CERTASS certification. Listed buildings may require planning permission.

Double glazing options in London include standard window retrofits, large window retrofits, sliding door double glazing, bay window conversions, whole-house packages, secondary glazing, acoustic glazing, and uPVC frame replacements. A whole house (3-bed) double glazing project in London averages £12,180.

Retrofit existing frames rather than replacing them to save 40–60%. Do the whole house at once for volume discounts. Choose standard double glazing over acoustic unless noise is a specific issue. Check government rebates and energy efficiency incentives. Compare at least three quotes from accredited glaziers. Secondary glazing in London starts from £210.

Check online reviews on Google and trade platforms. Confirm the installer holds relevant licences and accreditations for your state or territory. Ask whether they carry public liability insurance. Request a written quote that itemises labour and materials separately. Confirm the warranty terms for both the glass units and the installation work. Ask to see examples of recent completed projects.