BAY & BOW WINDOWS · Vancouver BC
Bay Window Replacement
Transform your living space with custom bay and bow windows. Nixon Glass fabricates and installs 3- to 5-panel configurations using ENERGY STAR certified vinyl frames — designed specifically for Vancouver's coastal climate.
Bay window replacement in Vancouver costs $1,200–$2,800 for a standard 3-panel bay window (72×48) and $1,800–$3,500 for a 4–5 panel bow window (96×48), fully installed. Price includes the window unit, structural support (seat board, knee brackets, header if needed), exterior flashing, interior trim, and old window removal. Nixon Glass has replaced 450+ bay and bow windows across the Lower Mainland since 2009.
Bay vs. Bow Windows Explained
Bay Windows
- 3 panels: one large center picture window + two flanking operable windows
- Projects outward at 30° or 45° angles
- Creates a defined, angular alcove — ideal for window seats
- Standard projection: 12–18 inches from wall
- Most popular for living rooms and master bedrooms
- Price range: $1,200–$2,800 installed
Bow Windows
- 4–5 panels of equal size, creating a gentle curve
- Projects outward in a smooth arc (no sharp angles)
- Creates a wider, rounded alcove — feels more spacious
- Standard projection: 10–14 inches from wall
- Popular for front-facing feature windows and dining areas
- Price range: $1,800–$3,500 installed
Bay & Bow Window Pricing Guide
All prices include supply, installation, structural support, flashing, trim, and old window removal. Based on Nixon Glass 2025–2026 project data.
| Configuration | Typical Size | vinyl Frame | Triple-Pane Upgrade |
|---|---|---|---|
| 3-Panel Bay (30° angle) | 60" × 48" | $1,200 – $1,800 | +$200 – $300 |
| 3-Panel Bay (45° angle) | 72" × 48" | $1,500 – $2,200 | +$250 – $350 |
| 3-Panel Bay (large) | 84" × 60" | $1,800 – $2,800 | +$300 – $400 |
| 4-Panel Bow | 84" × 48" | $1,800 – $2,600 | +$350 – $450 |
| 5-Panel Bow | 96" × 48" | $2,200 – $3,500 | +$400 – $550 |
| 5-Panel Bow (oversized) | 120" × 54" | $3,000 – $4,500 | +$500 – $700 |
* Structural modifications (new header, extended knee wall) may add $300–$800 depending on scope. Permits additional $150–$300 where required.
Benefits of Bay Window Replacement
Energy Efficiency
Old bay windows are notorious energy losers — the multiple panels and angles create more seal failure points. Modern vinyl bay windows with Low-E argon glass reduce heat loss by 45–55%, saving $50–$90/month on heating.
Curb Appeal & Home Value
A new bay or bow window transforms the look of your home's exterior. According to Canadian Real Estate Association data, bay window upgrades increase perceived home value by 5–8% — one of the highest-ROI exterior improvements.
Leak Prevention
Bay windows are exposed to more rain than flat windows due to their projection. Our installations include full aluminum flashing, sloped seat boards for drainage, and weathertight seals rated for 100 km/h wind-driven rain — critical for Vancouver.
Our Bay Window Installation Process
Measure & Quote
Free in-home measurement of the existing opening, structural assessment, and same-day written quote with exact pricing.
Fabrication
Your bay or bow window is custom-built at our local fabrication facility. Typical lead time: 3–4 weeks for standard vinyl, 5–6 weeks for specialty configurations.
Installation
Our 2-person crew removes the old window, inspects/repairs the rough opening, installs the new unit with proper support brackets, flashing, and insulation. Most bays completed in 4–6 hours.
Finish & Cleanup
Interior casing, exterior trim, caulking, and hardware adjustment. We remove all debris and clean the work area. Final walkthrough with you to confirm everything.
Bay Window FAQ
How much does a bay window cost in Vancouver?
A 3-panel bay window costs $1,200–$2,800 fully installed, depending on size and angle. 4–5 panel bow windows range from $1,800–$3,500. Triple-pane upgrades add $200–$550 depending on configuration. All prices include removal, installation, trim, and flashing.
Can I replace a bay window with a flat window?
Yes — we can convert a bay window opening to a flat picture window or a series of flat casement/slider windows. This requires framing modifications ($500–$1,200) to fill the projecting area and re-side the exterior. Some homeowners prefer this for a cleaner, modern look.
How long do bay windows last in Vancouver's climate?
Modern vinyl bay windows last 25–35 years in Vancouver's mild, wet climate. The key failure points are seals (15–20 year lifespan) and hardware. Our 25-year warranty covers frame, glass seal failure, and hardware defects.
Do bay windows leak more than regular windows?
Older bay windows are prone to leaking due to their outward projection catching more rain. Our installations include sloped aluminum flashing, sealed seat boards with positive drainage, and triple-sealed joints — tested to NAFS standards for wind-driven rain resistance up to 100 km/h.
Are bay windows energy efficient?
Modern bay windows with Low-E argon glass achieve U-factors of 1.2–1.4 W/m²K (dual-pane) or 0.8–1.0 W/m²K (triple-pane). While they have more glass area than flat windows, the improved glazing technology means a new bay window is dramatically more efficient than an old one.
Sources: Energy performance data based on NRCan energy efficiency guidelines. Window testing standards per BC Building Code. All pricing based on Nixon Glass Ltd. 2025–2026 project data.
Get Your Bay Window Quote
Custom-measured, fabricated locally, and installed by our expert crew. Free in-home consultations.