Replacement windows in Teesside
Replacement uPVC windows in Teesside cost £400–£700 per window supplied and fitted, £1,000–£1,800 for bays, and £3,500–£6,500 for a typical whole house of 8–10 windows. A-rated double glazing is the standard; FENSA or CERTASS certification should come with every full replacement.
What replacement windows cost on Teesside (2026)
| Job | Typical price | Notes |
|---|---|---|
| Standard uPVC casement | £400–£700 | Per window, A-rated, white |
| Bay window (3–5 section) | £1,000–£1,800 | Structural check advised on older bays |
| Sash-style uPVC | £600–£950 | Period terraces; sliding sash look |
| Aluminium | £800–£1,400 | Slim frames, contemporary stock |
| Whole house (8–10 windows) | £3,500–£6,500 | Per-window price drops ~20% in bulk |
Teesside pricing runs below the national average, the region's installers are competitive and overheads lower than the south. Coloured or foiled frames add 10–20% over white; triple glazing adds 20–30% and earns its keep mainly on exposed coastal elevations in Redcar and Saltburn.
The certification that matters
Replacing a whole window (frame and glass) is notifiable work under building regs. Certified installers self-certify through FENSA or CERTASS and hand you a certificate, you'll be asked for it when you sell the house, and its absence is a solicitor's delight in the worst way. Any installer who shrugs at the question is telling you something. Repairs and glass-only replacements don't need certification, which is one more reason repair-first is worth exploring.
Choosing spec without overbuying
A-rated double glazing with argon fill and a warm-edge spacer is the sensible standard for Teesside, the difference between A and A++ is marginal at our energy prices. Low-e glass is standard in any decent quote. Laminated or acoustic glass earns its premium on main-road frontages (the A19 corridor estates know who they are). Triple glazing only for exposed coastal spots or genuine noise problems. A good quote states the glass spec line by line; "energy efficient windows" with no spec is marketing, not a quote.
Getting quotes that compare
Tell us how many windows, rough sizes if you know them, and your postcode. Up to 5 Trusted local firms quote, expect a survey before final numbers, because bay structures, access and lintel condition genuinely change the price. Compare on frame make, glass spec, guarantee length (10 years is the standard) and certification, not just the bottom line.