What conservatory glazing costs in 2026
A conservatory has two glazing elements: the roof and the glazed sides. This page prices the glazing only. The roof is the bigger decision. A modern glass conservatory roof, using self-cleaning, solar-reflective glass, runs roughly £3,500 to £7,000 for a typical 3m x 3m space, or about £600 to £1,200 per square metre. Polycarbonate is the cheaper route at around £400 to £800 per square metre, though it holds heat far less well. The glazed sides, the windows and doors around the conservatory, are priced exactly like the rest of your home, so estimate those in the calculator above by frame material and count.
| Roof glazing | Price per m² | Notes |
|---|---|---|
| Glass roof | £600–£1,200 (avg £900) | Self-cleaning, solar-reflective glass. £3,500–£7,000 for a 3m x 3m roof. |
| Polycarbonate roof | £400–£800 (avg £600) | The cheapest option, £2,000–£4,000 for a 3m x 3m roof. |
Source: Checkatrade conservatory roof per-m² guide (last updated March 2026) and RTF 2026 pricing guide. Glazing component only, excluding solid or tiled roof conversions.
Glass roof or polycarbonate
For most homeowners, replacing tired polycarbonate with glass is the upgrade that makes a conservatory usable all year. Glass cuts glare, holds warmth in winter, stays cooler in summer with a solar-reflective coating and is far quieter in heavy rain. Polycarbonate still has a place where budget is tight or the conservatory sees little use. Whichever you choose for the roof, the same energy logic applies to the glazed sides, so spec A-rated sealed units there too. Our cost by glass spec page explains how the glass itself changes performance, and the energy savings calculator helps you weigh the payback.
The verdict on conservatory glazing
Upgrading conservatory glazing, especially the roof, is one of the better value home-comfort jobs you can do, far cheaper than rebuilding the structure. Glass is worth the premium over polycarbonate for any conservatory you actually use.
Worth it Conservatory glazing: worth it. A glass roof and A-rated glazed sides transform a space you currently avoid half the year.
The single best thing most people can do with a tired conservatory is bin the polycarbonate roof and put glass on. It changes the room from somewhere you cannot use in July or January into a proper space. Just be clear with the installer whether you want glass or a solid roof, because they are very different jobs and very different prices.
Tom Bradley, FENSA-registered installer
Frequently asked questions
A glass conservatory roof runs roughly £3,500 to £7,000 for a 3m x 3m space in 2026, or about £600 to £1,200 per square metre. Glazed side panels are priced like ordinary windows. Polycarbonate roofing is cheaper at around £400 to £800 per square metre.
Often yes. Modern self-cleaning, solar-reflective glass cuts glare, holds heat far better than old polycarbonate and reduces noise in heavy rain. It costs more than like-for-like polycarbonate but transforms how usable the conservatory is through the year.
No. This page prices the glazing only, meaning the glass roof and the glazed sides. A solid or tiled roof conversion is a building project rather than a glazing job, costs considerably more (£6,300 to £18,225 or more) and may need building regulations approval, so get a specialist quote for that.
Exactly like windows and doors. The frames and sealed units around the sides of a conservatory use the same per-window pricing as the rest of your home, so you can estimate them in the calculator above by frame material and count.