Bay windows in Southampton
From £1,600
| 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 |
Bay window replacements across Portswood, Highfield and beyond
The bay-fronted terraces of Portswood, Bevois Valley and Shirley form some of Southampton’s most recognisable streetscapes, and they generate more bay window replacement briefs than any other Hampshire town. Legacy Windows introduces you to bay specialists who quote a fixed supply-and-fit price, including structural head work where the mullions carry masonry above.
Why locals in Southampton choose Legacy Windows
- Typical 2026 pricing runs from £1,680 for a compact three-light square bay in UPVC to £3,990 for a splayed timber or aluminium replacement, adjusted for Southampton trade rates.
- All matched installers are FENSA or CERTASS registered, and structural work is covered by a separate Building Regulations sign-off where a lintel is fitted.
- Load-bearing head details are checked against the original construction, an important step in Southampton’s Victorian terraces where the bay often carries the wall above.
- Part L 2022 compliant units achieve a whole-window Uw of 1.4 W/m2K or lower, and self-cleaning coatings are available for exposed south-facing bays.
- Colour matching for stucco cills and heritage anthracite frames is included in every itemised quote.
Areas we cover around Southampton
Bay window enquiries are heaviest in SO15, SO17 and parts of SO18, and Portswood and Shirley are the two areas where our panel quotes most weekly. Bassett, Highfield and Bitterne see a steady flow of splayed interwar bays. Requests from Eastleigh, Chandler’s Ford and Fareham are matched with the same local fabricators, and any brief inside one of the fifteen conservation areas is flagged to protect the streetscape.
Frequently asked questions
Does a bay window replacement need Building Regulations sign-off? Yes if the bay is load-bearing. On many Southampton Victorian terraces the wall above sits on the bay head, so a lintel and structural calculation is required. FENSA covers the glazing, and a separate building notice covers the structural work.
Can I change a square bay to a splayed bay? Only with planning approval, since the footprint alters the elevation. In a conservation area or on an Article 4 street the answer is almost always no. Like-for-like replacements are far quicker to approve.
What colour options work best on a Southampton terrace? White remains most common, but heritage cream and anthracite grey are increasingly requested in Portswood and Bassett. All three come with the same guarantee.
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.