French & patio doors in Cardiff
From £1,300
| Service | Typical price in Cardiff |
|---|---|
| UPVC double glazed windows | £396 - £792 |
| Sash windows (UPVC & timber) | £792 - £2,112 |
| French & patio doors | £1,144 - £2,816 |
| Bay & bow windows | £1,408 - £3,344 |
| Secondary glazing | £308 - £836 |
French and patio door quotes for Cardiff terraces, semis and rear extensions
Cardiff’s terraced streets almost all have a rear garden of some kind, and opening the kitchen or dining room out onto it is one of the most common projects — from Cathays student conversions upgrading for the family market to Cyncoed extensions where a full open-plan kitchen-diner is standard. Legacy Windows is a quote comparison service that matches you with vetted installers who quote itemised prices for French, patio and bifold sets under Welsh Building Regulations Part L.
Why locals in Cardiff choose Legacy Windows
- Terrace rear-return door specialists in Cathays, Roath and Grangetown
- Suburban extension bifold and slider installers in Cyncoed and Lisvane
- PAS 24 accreditation and multi-point locks confirmed in writing
- Structural check when a new opening is being formed
- FENSA or CERTASS notification handled by the installer
Areas we cover around Cardiff
Our panel serves the full CF postcode area, with extension work concentrated in CF23 (Cyncoed, Penylan), CF14 (Whitchurch, Lisvane), CF11 (Pontcanna, Canton) and CF5 (Llandaff, Radyr). Also serving Penarth, Barry, Caerphilly and Bridgend.
Frequently asked questions
French, patio or bifolds for a typical Cardiff extension? Openings under 2m suit French doors with fixed side lights. 2.0-2.4m works for two-panel sliders. Above 3m — common in Cyncoed and Lisvane kitchen-diner extensions — three or four-panel aluminium bifolds are the norm. Sightlines and threshold height should be in every quote.
Do I need Building Control sign-off? Yes if you are cutting a new opening in a load-bearing wall. Under Welsh Regs, the lintel spec, cavity closer and thermal bridging all need to meet Part L. Your installer’s quote should note whether they handle Building Control notification or whether the builder does.
Typical Cardiff prices? UPVC French doors £1,150 to £1,800 fitted; aluminium sliders £1,900 to £2,500; three-panel aluminium bifolds £2,400 to £2,820 depending on frame colour and glass. Timber sets for Pontcanna or Llandaff conservation streets push toward £2,200 upwards.
Windows and doors in Cardiff - local context
Cardiff's signature bay-fronted Victorian terraces dominate Cathays, Roath and Grangetown, with detached Edwardian villas in Cyncoed and Lisvane, and modern apartments in the Bay redevelopment.
Dominant era of housing stock: Victorian and Edwardian bay-fronted terraces.
Heritage note: Around 27 conservation areas including Pontcanna, Roath Park and Cathays Park.
- Cathays
- Roath
- Pontcanna
- Penylan
- Cyncoed
Postcodes we cover in Cardiff
- CF10
- CF11
- CF14
- CF23
- CF24
Not seeing your postcode? Request a quote anyway - we likely still cover it.