Buyer's guide

Cost of new windows in South Wales — 2026 pricing

The single question we get most often on a first call is "roughly, what's this going to cost?" — so here are the honest 2026 numbers we quote across Caerphilly, Cardiff, Pontypridd, Cwmbran and the coast. Every figure below includes VAT, fitting, rubbish removal and the 10-year guarantee.

Per-window pricing (fitted)

• uPVC casement, white: £450–£650
• uPVC casement, anthracite foil: £530–£730
• Flush sash uPVC (heritage look): £680–£950
• Bay or bow (3–5 panel): £900–£1,600
• Aluminium casement, slim sightline: £900–£1,300
• Triple-glazed uPVC: £680–£920

Whole-house guide (3-bed, ~7 windows)

• uPVC white — £3,200–£4,500
• uPVC anthracite — £4,000–£5,800
• Aluminium — £6,500–£9,000
• Triple glazing — £5,500–£7,800

See our full-house replacement page for how we sequence the install so neighbours aren't blocked in.

What actually moves the price

Frame colour (white vs foiled), glass spec (double vs triple, low-E, acoustic), openers vs fixed, access (upper floors, awkward bay lintels), and disposal of any old aluminium frames with asbestos-era sealant.

FAQs

How much does a single uPVC window cost fitted in South Wales?

A standard side-hung uPVC casement in white runs £450–£650 fitted for most Caerphilly, Cardiff and Pontypridd terraces. Anthracite grey adds around £80. Larger bay or bow windows sit in the £900–£1,400 range.

What does a full house of windows cost?

As a working average for a 3-bed South Wales semi with 7 windows: £3,200–£4,500 for uPVC in white, £4,000–£5,800 for anthracite foil, £6,500–£9,000 for slim aluminium, and £5,500–£7,800 for triple glazing. Prices include VAT, fitting, waste removal and a 10-year guarantee.

Is triple glazing worth the extra?

On exposed hillside properties (Pontypool, Brecon, higher Rhondda) or homes next to trunk roads (A470, A469, A48) — yes. On mid-terrace city homes with quiet frontages, an A+ rated double-glazed unit gives most of the benefit at 25–30% less.

Do you match neighbours' window colour on a terrace?

Yes — we bring physical foil samples to the survey. Matching to a neighbour's anthracite or Chartwell green helps kerb appeal on Cathays, Roath or Caerphilly castle-quarter terraces.