Double Glazed Sashes (Fitted Into Existing Box Frames) 2025 Pricing

What Drives the Cost Up? Here are the main factors that can increase the total cost: Rotten windowsills on the existing box frames If the sill is rotten, we’ll need to cut out the damaged timber and rebuild it on site. This adds time and materials. Typical extra cost: £700 – £800 per sill (fully […]

Cost of New Box Sash Windows in 2025: A Transparent Guide

1 Victorian Double-Glazed Box Sash (Fully painted with architrave and bullnose) £3,438 incl. VAT

1. What Drives the Cost Up? Here’s what pushes prices toward the higher end: Premium Timber We use high-grade Redwood or Accoya timbers that resist rot and last for decades. Accoya alone carries a 50-year guarantee and boosts long-term value. Expect quality timber windows to start around £2,550 + VAT each. Bespoke Joinery Off-the-shelf windows are […]