Window Replacement Cost in St. John's (2026)
Average cost in St. John's
$3,750 — $14,100
$450 — $1,620 per sq ft
Cost Breakdown
ItemizedEnergy-efficient frames and glazing
80%
Professional fitting and sealing
15%
Removal of old units and debris
3%
Municipal building permits
1%
Coastal weatherproofing supplies
1%
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 8 sources and market data for St. John's. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
$9,007
Today
$9,421
Window Replacement in St. John's is ↑ 4.6% compared to roughly a year ago — about $414 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Window Replace Contractors in St. John's
Verified providersUniglassPlus / Ziebart - St. John's
439 Kenmount Rd, St. John's, NL A1B 4G1, Canada
170 reviews
Eastern Siding & Window World
5 Thomas Byrne Dr, Mount Pearl, NL A1N 0A6, Canada
80 reviews
PW Windows Doors & Hardware Ltd
161 Glencoe Dr, Mount Pearl, NL A1N 4S7, Canada
21 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
Yes, for most renovations in St. John's, a permit is required. Fees are typically $9 per $1,000 of construction value, with a minimum fee of $50. Minor repairs may not require one, but full replacements generally do.
In St. John's, triple-pane windows are highly recommended due to the harsh North Atlantic winds and salt spray. While they cost 20-30% more than double-pane (averaging $1,000-$1,300 per unit), they can reduce heat loss by up to 40%.
Logistics and shipping costs to Newfoundland typically add a premium to unit prices. Additionally, the city's coastal climate requires higher-spec wind-resistance ratings, which can lift average per-unit costs by 10-15% compared to central Canada.
The peak season is June to September due to the short construction window. Scheduling in late autumn or winter can sometimes yield off-season discounts of 10-20%, though weather delays are more frequent.
📊Our Methodology
How we collect dataAggregated from 5+ 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: 2 weeks ago. Updates run weekly. All costs in CAD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.