Glass & sealed-unit replacement · 2026
Window Glass Replacement Cost UK
Replacing only the glass can be far cheaper than replacing the complete window when the frame is still in good condition. Costs vary widely because a small sealed unit and a large toughened or laminated pane are very different jobs.
Quick price answer: Professional double-glazed glass replacement commonly falls somewhere around £55–£300 per window, while larger misted units and opening panels can reach roughly £225–£325.
Typical glass-only replacement costs
Glass-only work is different from replacing the complete frame. Current UK market guides put ordinary professional double-glazed glass replacement across a broad £55–£300 range depending on unit size and access.
Replace the glass or the whole window?
If the frame is sound and the failure is confined to a cracked or misted sealed unit, replacing the glass can be much cheaper than replacing the whole window. A failing frame, damaged hardware, severe draughts or poor overall performance can make complete replacement more sensible.
What changes double-glazed unit cost?
- Width, height and glass thickness
- Toughened, laminated or patterned glass
- Low-E coatings and spacer specification
- Ground-floor versus difficult access
- Whether beads, gaskets or hardware also need work
Calculator limitation: the main calculator prices complete fitted windows and doors, not glass-only repairs. Use the figures on this page for sealed-unit replacement and the calculator when you are comparing a full replacement frame.
Related price guides
Compare the closest related costs without creating a separate page for every wording variation.
Questions people ask
How much does it cost to replace glass in a double glazed window?
A simple professional replacement can start around £55–£100, with many jobs sitting within roughly £100–£300 depending on size and specification.
Can you replace a misted double glazed unit without replacing the frame?
Often, yes. If the frame and hardware remain serviceable, the sealed glass unit can usually be replaced separately.
When is a whole new window better value?
Complete replacement becomes more attractive when the frame is failing, draughty, distorted, damaged or already due for a wider efficiency upgrade.
Comparing with a full replacement?
Use the main calculator to see what a complete fitted window would cost before deciding whether glass-only repair still makes sense.
Compare full replacement cost →