Window and Door Budget Calculator
Estimate your extension windows and doors budget: windows by size, material, and opening style; bifold or sliding doors with optional integrated blinds; plus sealing costs. Reads graph-backed 2026 market pricing with bespoke-tier overrides for aluminium.
Premium calculator — unlock with an Access Pass
This calculator is part of the Kitchen Extension Access Pass. Get full access to every calculator, guide, and tool — from planning through to completion.
Get Access PassOne-time payment. 24 months access.