Double Glazing Cost Calculator 2025
Estimate your window and door cost
Double Glazing Cost Calculator
Estimate your window or door cost including VAT & installation.
All prices are market averages for guidance only.
Your Basket
| Item | Size | Installation | Est. Cost (incl. VAT) | |
|---|---|---|---|---|
| No items yet. | ||||
| Total | £0 – £0 | |||
Finance (optional)
Min £200, max 50% of basket (updates automatically).
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Illustrative only. Final finance is subject to status and provider.
We’re a Home Improvement Agency — these prices are estimates only and may vary by supplier.
What you’ll get
- Instant guide prices (incl. VAT)
- Adjust by size, openers and material
- Optional finance illustration
- Email a summary you can save, print or share
- Optional quotes from vetted local installers (no obligation)
- Price ranges updated weekly from recently sold projects
- Free service
What you won't get
- Pushy sales calls
- Spam — we’ll only email your summary; marketing is opt-in
- Data selling — we don’t sell your data
- Hidden extras — the prices shown include VAT
- Any commitment — request quotes when you’re ready
Quick note: Lower-end guide prices typically reflect compliant installs by companies registered with a Competent Person Scheme (e.g. FENSA, Certass, Assure) for Building Regulations self-certification. Higher-end prices often include upgraded specs such as PAS 24 / Secured by Design security, BFRC energy-rated products, and sometimes BBA-certified systems.