Double glazing cost in Cardiff (2026)
Real 2026 prices for South Wales homeowners · uPVC from £410/window · around 8% below UK national average
What homeowners in Cardiff typically pay
Cardiff and the surrounding South Wales area sit around 8% below the UK national average for double glazing. Welsh homeowners on qualifying benefits can apply for fully funded upgrades via the Nest scheme — separate from England’s ECO4.
| Property type | Windows | uPVC total | Aluminium total |
|---|---|---|---|
| Flat / apartment (CF) | 3-5 | £1,400 – £2,600 | £2,000 – £3,700 |
| 2-bed terrace (Roath, Canton, Cathays) | 6-8 | £2,600 – £5,250 | £3,700 – £7,450 |
| 3-bed semi (Penylan, Whitchurch, Rhiwbina) | 8-10 | £3,500 – £7,200 | £4,950 – £10,200 |
| 4-bed detached (Lisvane, Radyr, Cyncoed) | 10-14 | £5,150 – £10,750 | £7,300 – £15,250 |
Cardiff housing stock considerations
- Victorian terraces (common in Roath, Canton, Cathays): often require sash-style windows to match original character — 40-60% more than casement uPVC
- 1930s semis (Penylan, Whitchurch, Rhiwbina): standard casement style — the most cost-effective replacement
- Conservation areas (Pontcanna, Cathays Park, Roath Park): may require planning permission and wooden frames — budget +30-60%
- Detached properties (Lisvane, Radyr, Cyncoed): typically 10-14 windows; aluminium is a common choice for modern detached stock
Local planning considerations
Cardiff is covered by Cardiff Council, Vale of Glamorgan Council. FENSA handles Building Regs notification automatically. You receive your FENSA certificate within 10 working days of install. For conservation-area work you may need additional planning consent (free pre-check available).
Average savings via comparison
Cardiff homeowners using Findfitter save an average of £1,700 compared to accepting a single national-chain quote. Spread between cheapest and most expensive quote for identical spec is typically £1,900 – £3,000 in CF-postcodes.
Get quotes from Cardiff fitters
Enter your postcode to start — up to 4 vetted Cardiff installers respond within 24 hours.
Cardiff double glazing — homeowner FAQs
Do I need planning permission in Cardiff?
Most like-for-like replacements don’t need planning permission — your FENSA-registered installer handles Building Regs compliance automatically. For work in conservation areas (Pontcanna, Cathays Park, Roath Park), Article 4 directions may apply to front-elevation changes. Check with your council before ordering.
Are Cardiff installers FENSA-registered?
Yes — every installer Findfitter matches must be FENSA-registered (or equivalent). You receive a 10-year insurance-backed guarantee and automatic compliance notification with every install.
Can I get grants for double glazing in Cardiff?
Welsh homeowners on qualifying benefits may qualify for fully funded energy upgrades via the Nest scheme.
How long does installation take in Cardiff?
A typical Cardiff semi with 8-10 windows is fitted in 1-2 days by a two-person team. Lead time from order to install is typically 4-6 weeks for standard uPVC, 6-8 weeks for aluminium, and 8-12 weeks for heritage sash.
Why is Cardiff around 8% below the UK average?
Regional labour rates, local installer competition, and proximity to UK uPVC and aluminium fabricators all factor in. Cardiff’s position reflects lower labour rates than London and the South-East, and strong local installer competition.
Sources & references
- FENSA installer register
- Energy Saving Trust — windows advice
- British Fenestration Rating Council (BFRC)
- Nest scheme — Welsh Government
- Cardiff Council — planning
From homeowners like you
Was dreading pushy salesmen. Instead got three polite, short calls and a written quote within 48 hours. Went with the local fitter — itemised breakdown, no pressure, 20-year frame warranty.
Victorian terrace in Headingley — needed sash-style to match the street. Found a heritage specialist locally via Findfitter, otherwise I'd never have known they existed. Beautiful work.
Compared 4 quotes in under 10 minutes. Gap between cheapest and most expensive was £2,300 for identical spec. Would have been totally lost going direct.