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!
St Austell Bay Windows and St Austell Bay Plastics is an established supplier and installer of windows, doors and glazing products for new build developments, self-build projects and high-end residential developments across Cornwall. With nearly twenty years of experience and our own in-house installation team, we offer developers, architects and project managers a reliable, quality-driven glazing partner from groundworks through to handover. We currently supply and install across active developments in Cornwall — including a six-property high-end development currently under way and two further developments completed earlier this year. Whether you're a small developer building a handful of premium homes or a project manager overseeing a larger scheme, we have the product range, trade pricing and local knowledge to support your project from specification through to completion. All our products are A-rated, Certass registered and backed by our insurance-backed guarantee of up to 10 years — giving your buyers the quality and
Flexible Finance
Spread the Cost of Your Home Improvements
Make windows, doors and conservatories more affordable with monthly payment options — including no-deposit deals for qualifying customers.
- Flexible monthly payments
- No-deposit options available
- Quick online application
- Subject to status and credit checks
Yes. We are based in St Austell and supply and install across the whole of Cornwall — from Truro and Falmouth to Newquay, Padstow, Bodmin, Liskeard and beyond. We work to agreed lead times and can phase installations to match your development programme wherever you are in Cornwall.
Yes. Every window and door installation we carry out is Certass registered and a Certass certificate is issued for each plot on completion. These are provided to you for your solicitors and new owners as part of our standard handover documentation.
Yes. Developers and project managers can open a dedicated trade account with St Austell Bay Plastics and access exclusive trade pricing across our full product range. Volume discounts are available on larger developments — contact our team to discuss a dedicated pricing package for your project.
Yes. Our team is experienced in working to architect specifications and planning conditions — including requirements for specific frame colours, heritage or flush casement window styles, conservation area conditions and energy performance targets. We will review your specification at enquiry stage and confirm which products are most appropriate for your development.
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.
