Window Replacement Cost in St. John's (2026)
Average cost in St. John's
$4,500 — $16,200
$450 — $1,620 per window
Cost Breakdown
ItemizedWindows, glass, and frames
65%
Professional installation
25%
Removal of old windows
5%
Caulking, shims, and fasteners
5%
HST at 15%
📋What's Included
ScopeTypically Includes
- Standard vinyl double-hung windows
- Removal of old windows
- Installation & insulation
- Interior trim
- Cleanup
Typically Excludes
- Custom or specialty shapes
- Triple-pane or premium glass
- Exterior trim or cladding
- Structural modifications
- Bay or bow windows
Based on replacing 10 standard-size windows with vinyl double-hung.
🧮Estimate Your Cost
InteractiveEstimated Cost
$3,760 — $5,640
Based on 6 sources and market data for St. John's. Actual costs may vary depending on specific project requirements.
🏢Top Window Replace Contractors in St. John's
Verified providersUniglassPlus / Ziebart - St. John's
439 Kenmount Rd, St. John's, NL A1B 4G1, Canada
154 reviews
Rydel Roofing, Siding, Windows & Doors
43 Welland St, St. John's, NL A1A 5B6, Canada
70 reviews
Eastern Siding & Window World
5 Thomas Byrne Dr, Mount Pearl, NL A1N 0A6, Canada
77 reviews
Newfoundland Glass & Service
Tara Place, 31 Peet St, St. John's, NL A1B 3W8, Canada
42 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
In 2026, the cost to replace a single window in St. John's ranges from $450 for budget options to $1,620 for premium, energy-efficient units, with the average being around $810.
For a typical detached home requiring 10 replacement windows, homeowners in St. John's can expect to pay between $4,500 and $16,200, with an average project cost of $8,100.
Yes, homeowners can often take advantage of federal and provincial energy efficiency programs, which can provide rebates for installing ENERGY STAR certified triple-pane windows to combat the harsh Atlantic climate.
Yes, a retrofit installation (inserting a new window into an existing frame) is generally cheaper, while a full-frame replacement (brick-to-brick) costs 15-20% more due to the extra labor and materials required.
📊Our Methodology
How we collect dataAggregated from 6+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: today. Updates run weekly. All costs in CAD.