VS
Venetia Shepherd
8 April 2021
✓ Recommends usSuch a brilliant and professional company. So good to deal with and the windows are really special — they have transformed our seaside cottage. Thank you so much!
If you're searching for replacement windows in St Austell or a reliable local installer for uPVC windows, flush casement windows, tilt and turn windows or aluminium windows — you've found the right team. St Austell Bay Windows and St Austell Bay Plastics is a family-run business based in St Austell, supplying and fitting A-rated double glazed windows to homeowners across the whole of Cornwall — including Truro, Bodmin, Newquay, Falmouth, Fowey, Lostwithiel, Liskeard, Padstow and St Mawes. Every window we install is fitted by our own experienced local team — no sub-contractors, no call centres, no hard sell. Just honest advice, quality products and a finish you'll be proud of, backed by our 10-year insurance-backed guarantee and Certass registration.
We supply and install a full range of uPVC, aluminium, and timber-effect windows including casement, tilt and turn, flush casement, fully reversible, and sliding sash styles.
Yes — all our windows are A-rated for energy efficiency as standard, helping to reduce heat loss and lower energy bills for your home.
Most window installations in St Austell are completed within a single day, depending on the number of windows being replaced.
Yes — all our window installations come with a comprehensive manufacturer's guarantee alongside our own workmanship warranty for complete peace of mind.
Finance Available
Finance Your New Windows
Spread the cost of A-rated uPVC, casement, sash and aluminium windows with flexible monthly payments tailored to your budget.
- Casement, sash & aluminium styles
- Energy-efficient A-rated glazing
- 10-year insurance-backed guarantee
- Quick and easy online application
Why Choose Us
Based in St Austell
We're Your Local Specialists. We're not a national chain. We live and work in the same area as our customers. When you choose St Austell Bay Windows and St Austell Bay Plastics , you're supporting a local family business that genuinely cares about its reputation.
Up to 10-Year Insurance-Backed Guarantee
Every window, door and conservatory we fit is backed by up to 10-year insurance-backed guarantee — not just a piece of paper, but a fully insured guarantee you can rely on even if circumstances change.
Flexible Finance Available
Spread the cost of your new windows or doors with our flexible finance options — including no-deposit deals. Making home improvement accessible for every budget in St Austell and surrounding areas. Subject to status.
Certass Registered
Every installation we carry out is Certass registered, giving you legal compliance, building regulation sign-off and full documentation. All our windows and doors meet Secured by Design standards for maximum home security.
In-House Fitters
Our installations are always carried out by our own trained, experienced team — never sub-contracted out. That means consistent quality, accountability and a finish you'll be proud of.
A-Rated Energy Efficient Products
All our double glazed windows achieve Window Energy Rating A as standard, with U-values as low as 1.2 W/m²K — keeping your home warmer and your heating bills lower all year round.
Step 1 - Free Home Survey
Step 2 - Your Personal Quote
Step 3 - Final Survey
Step 4 - Products Are Manufactured
Step 5 - Professional Installation
Covering St Austell & All Surrounding Towns
Honest advice, quality products and a finish you'll be proud of.
When you invest in new windows or doors, you want complete peace of mind — and that's exactly what we deliver. Every installation carried out by St Austell Bay Windows and St Austell Bay Plastics is backed by an insurance-backed guarantee of up to 10 years as standard.
That means your frames, glazing units, locks and workmanship are all covered long after our vans have left your driveway. Your installation is also registered with CERTASS for building regulation compliance.
Every installation is carried out by our own in-house team of experienced local fitters - and we never sub-contract. That means consistent quality, full accountability and a clean, tidy finish every single time.
From your free home survey through to the final fit and CERTASS sign-off, we manage the entire process ourselves. Most installations are completed within a day or two, with minimal disruption to your household.
