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    Transparent Pricing

    Secondary Glazing Prices: Complete Cost Guide 2025

    Clear, honest pricing with no hidden costs. Every quote includes professional installation, free survey, and our comprehensive 25-year warranty.

    Our Packages

    Standard

    Perfect for typical noise reduction needs

    £450per window
    • 6.4mm acoustic laminated glass
    • Slim aluminium frames
    • Standard colour options
    • Up to 45dB noise reduction
    • 10-year warranty
    • Professional installation
    Get Free Quote
    Most Popular

    Premium

    Maximum noise reduction performance

    £550per window
    • 10.8mm acoustic laminated glass
    • Ultra-slim aluminium frames
    • Full RAL colour range
    • Up to 50dB noise reduction
    • 25-year warranty
    • Professional installation
    • Priority scheduling
    Get Free Quote

    Heritage

    For listed & conservation properties

    £650per window
    • Conservation-grade specifications
    • Period-appropriate designs
    • Invisible fixing options
    • Listed building approval support
    • 25-year warranty
    • Specialist installation
    • Conservation officer liaison
    Get Free Quote

    What Affects Your Price?

    Every project is unique. Here are the main factors that influence your final quote.

    1

    Window Size

    Larger windows require more materials and careful handling

    2

    Glass Specification

    Thicker acoustic glass provides better noise reduction

    3

    Opening Style

    Sliding, hinged, or fixed panels have different costs

    4

    Access & Complexity

    High windows or difficult access may require special equipment

    Additional Costs Guide

    On-site survey & assessmentFREE
    Design consultationFREE
    Detailed written quoteFREE
    Standard installationIncluded
    Removal of existing secondary glazingFrom £50/window
    Difficult access installationQuote on assessment
    Bay window premium+15-25%
    Sash window mechanismsFrom £75/window

    All prices are indicative and subject to site survey. We provide detailed written quotes with no hidden costs after assessing your specific requirements.

    Why Our Pricing Represents Great Value

    25 Years

    Industry-leading warranty on premium installations

    10%

    Average reduction in heating bills

    5-7 Years

    Typical payback through energy savings

    Get Your Free, No-Obligation Quote

    Every quote includes a free on-site survey, detailed specification, and transparent pricing with no hidden costs.

    Call 0207 060 1572Request Quote Online

    Sources & References
    AI-verified

    Authoritative sources supporting the information in this article.

    1. British Standards Institution (BSI) (2008). Code of practice for daylighting and Hygrothermal performance of building components and building elements.. BS 8206-2:2008 / BS EN 15026.Open source

      This is the definitive British standard for energy performance in buildings, providing the framework for why secondary glazing is a cost-effective alternative to replacement windows.

    2. Historic England (2017). Traditional Windows: Their Care, Repair and Upgrading.. Historic England Guidance Note.Open source

      Crucial for London-based installations in heritage or listed buildings where full window replacement is prohibited, influencing project costs and specification requirements.

    3. Department for Levelling Up, Housing and Communities (2021). Approved Document L1B: Conservation of fuel and power in existing dwellings.. HM Government Building Regulations.Open source

      Mandates the conservation of fuel and power; secondary glazing is a primary method for meeting these standards in existing London dwellings without changing the facade.

    4. Saint-Gobain Glass / Glass and Glazing Federation (GGF) (2020). The Use of Glass in Windows for Sound Insulation.. GGF Technical Publication 5.2.Open source

      Provides the technical acoustic data (dB reduction) used to justify the premium cost of laminated acoustic secondary glazing in high-noise London environments.

    5. BRE (Building Research Establishment) (2005). Energy efficiency in historic buildings: secondary glazing.. BRE Information Paper IP 15/05.Open source

      Offers empirical data on heat loss reduction through secondary glazing, which is essential for calculating the Return on Investment (ROI) for London homeowners.