3 Best Windows & Door Companies In St. John's
Expert-recommended Top 3 Windows & Doors companies in St. John's, NL. Every company below is hand-picked and verified through our 30-point review of reputation, customer reviews, service, product quality, and local presence. You deserve only the best!
Mullions is an independent directory and is not affiliated with or endorsed by the City of St. John's.
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PW Windows Doors & Hardware Ltd
- Vinyl Windows
- Casement Windows
- Awning Windows
- Entry Doors
- Patio Doors
- Window & Door Installation
St Johns Exteriors Inc
- Vinyl Windows
- Casement Windows
- Awning Windows
- Entry Doors
- Patio Doors
- Window & Door Installation
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CGH Home Development Ltd.
- Vinyl Windows
- Casement Windows
- Awning Windows
- Entry Doors
- Patio Doors
- Window & Door Installation
Windows & Doors in St. John's: A Local Buyer's Guide
St. John's is the windiest, foggiest, and among the wettest cities in Canada — conditions that test every window and door. From the historic downtown row houses to Mount Pearl and Paradise, wind-driven rain and salt air make quality installation essential.
🌡️ Climate & what to buy
St. John's sees relatively mild but extremely wet and windy winters, with frequent wind-driven rain. Windows and doors here need excellent weather-sealing and corrosion resistance above all — low-E double- or triple-pane vinyl or fibreglass units, expertly installed and sealed, to keep out water and wind.
📋 Permits & bylaws
In St. John's, like-for-like replacement generally doesn't need a permit, but enlarging or adding openings does, and downtown heritage areas may have added rules. Confirm with the City of St. John's before ordering.
💰 Rebates & incentives
St. John's homeowners can look to the takeCHARGE program (Newfoundland Power and NL Hydro) for efficiency rebates, alongside the federal Canada Greener Homes Loan. Confirm current window eligibility before you buy.
📅 Best time to install
Aim for the drier, calmer stretches of late spring through early fall so installations seal properly against the wind and rain.
Serving neighbourhoods across St. John's: Downtown · Georgestown · Mount Pearl · Paradise · Kilbride · Airport Heights
Why Hire a Local Window & Door Expert in St. John's?
Working with a local professional in St. John's means faster service, climate-right materials, and someone who knows Newfoundland and Labrador building codes and stands behind the work.
- ✅ Faster response times — local crews schedule estimates and installs quicker than out-of-town providers.
- 🌡️ Climate-specific advice — they know which materials perform best in St. John's.
- 📋 Permits & bylaws — avoid delays or fines with a contractor who knows the local rules.
- 🔧 Reliable aftercare — if an issue arises, your contractor is a call away, not in another city.
- ⭐ Trusted reputation — local businesses live and die by word-of-mouth and reviews.
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Common Window & Door Services in St. John's
Local pros in St. John's handle everything from energy-efficient upgrades to full entryway transformations. The most-requested services:
Window Replacement & Installation
Upgrade old or damaged windows with energy-efficient double-pane, triple-pane, or low-E glass units.
Door Replacement & Installation
Improve curb appeal and security with quality front doors, patio sliders, and custom entry systems.
Sliding & French Patio Doors
Add functionality and natural light with space-saving sliding doors or elegant French doors.
Custom Window Solutions
Bay windows, bow windows, or oversized picture windows for unique architectural needs.
Energy-Efficient Upgrades
ENERGY STAR® certified windows and insulated doors built for St. John's's climate.
Window & Door Repairs
Fix cracked frames, foggy glass, faulty locks, and weather stripping — without full replacement.
Retrofit & Full-Frame Installation
Choose retrofit (keeping the existing frame) or full-frame installation for a complete upgrade.
Condensation & Draft Solutions
Resolve air leaks, poor sealing, and moisture build-up for better indoor comfort.
Average Cost of Windows & Doors in St. John's, Newfoundland and Labrador
Costs vary by material, size, style, and installation method. Typical St. John's price ranges:
| Service Type | Average Cost (Installed) |
|---|---|
| Standard Vinyl Window (per unit) | $500 – $1,000 |
| Triple-Pane Window (per unit) | $750 – $1,300 |
| Bay or Bow Window | $2,200 – $4,200+ |
| Entry Steel Door | $1,100 – $1,900 |
| Fiberglass Entry Door | $1,600 – $2,600 |
| Sliding Patio Door | $1,300 – $2,900 |
| French Door (Double) | $1,900 – $3,600 |
Frequently Asked Questions
How does Mullions choose the top 3 companies in St. John's?
Each business is evaluated against our 30-point review standard — reputation, customer reviews, licensing, online presence, and business integrity — before being featured.
Is it free to request quotes in St. John's?
Yes. Submitting the quote form is completely free for homeowners, and your request goes to all featured companies in St. John's at once.
Do I need a permit to replace windows or doors in St. John's?
In St. John's, like-for-like replacement generally doesn't need a permit, but enlarging or adding openings does, and downtown heritage areas may have added rules. Confirm with the City of St. John's before ordering.
What does it cost to replace windows in St. John's?
Most windows run $450–$1,200 per unit installed depending on material and glass; a full-home project is typically $8,000–$18,000. See the price table below.
How soon will companies respond?
Most featured local companies respond within one business day.
Windows & Doors in Nearby Cities
- 📍Mount Pearl
- 📍Corner Brook
- 📍Gander
- 📍Grand Falls-Windsor
- 📍Happy Valley-Goose Bay
- 📍Stephenville
- 📍Labrador City
- 📍Clarenville
- 📍Marystown