Secondary glazing in Southampton
From £350
| Service | Typical price in Southampton |
|---|---|
| UPVC double glazed windows | £473 - £945 |
| Sash windows (UPVC & timber) | £945 - £2,520 |
| French & patio doors | £1,365 - £3,360 |
| Bay & bow windows | £1,680 - £3,990 |
| Secondary glazing | £368 - £998 |
Secondary glazing for listed and noise-affected Southampton homes
Between the docks, the M27 and the flight path into Southampton Airport, plenty of homes in the city need a serious drop in noise without touching the original frame. Secondary glazing is the option Southampton City Council conservation officers usually accept where a full sash replacement or slim double glazing is refused, and Legacy Windows matches you with three specialists who quote a fixed price on the same brief.
Why locals in Southampton choose Legacy Windows
- Typical 2026 pricing runs from around £370 for a small horizontal slider to £998 for a full-height vertical unit, calibrated to Southampton trade rates.
- Slim aluminium frames sit inside the original reveal, meaning no change to the outside elevation and no need for Listed Building Consent in most conservation cases.
- Acoustic laminated glass options cut traffic and aircraft noise by up to 45 dB, tested to BS EN ISO 10140.
- Thermal performance improves the whole-window Uw from around 4.8 down to 1.8 W/m2K, comfortably meeting Part L for retained original frames.
- All matched fitters carry public liability insurance and a workmanship warranty of at least ten years.
Areas we cover around Southampton
Secondary glazing briefs are heaviest in SO14 around the Old Town and the docks, SO15 in Freemantle and along the airport approach in SO18. Bassett Green, the Old Town and other conservation streets generate a steady flow of Listed Building enquiries. Requests from Portsmouth, Fareham and the New Forest fringes are matched with the same Hampshire secondary glazing specialists.
Frequently asked questions
Will secondary glazing cut aircraft noise from Southampton Airport? Yes, provided the cavity between the primary and secondary pane is at least 100 mm and the secondary unit uses 6 mm acoustic laminated glass. Our panel typically specifies 150 to 200 mm cavities for homes under the SO18 approach.
Do I need Listed Building Consent for secondary glazing? Usually no, because the original frame is untouched. Southampton City Council conservation officers commonly recommend secondary glazing exactly for that reason. It is worth a quick call to confirm before you order.
Can secondary glazing hit Part L on its own? On a single-glazed original frame, adding secondary glazing pulls the assembly Uw down to around 1.8 W/m2K, which counts as compliant improvement work under Part L 2022 for retained fabric.
Windows and doors in Southampton - local context
Victorian terraces in Portswood and Bevois Valley, interwar semis in Highfield and Bassett, plus dockside modern developments post-2005.
Dominant era of housing stock: Victorian to interwar, plus WWII-era rebuild near the docks.
Heritage note: Around 15 conservation areas including Old Town and Bassett Green.
- Bassett
- Highfield
- Portswood
- Bitterne
- Shirley
Postcodes we cover in Southampton
- SO14
- SO15
- SO16
- SO17
- SO18
Not seeing your postcode? Request a quote anyway - we likely still cover it.