What a Window Actually Costs, Installed
National averages are nearly useless because "a window" spans everything from a $300 builder-grade slider to a $3,000 architectural casement. Here's how 2026 installed pricing actually breaks down, based on what we quote every week in the Treasure Valley:
| Material tier | Installed price per window | Realistic lifespan in Idaho | Example brands |
|---|---|---|---|
| Builder-grade vinyl | $450–$700 | 15–20 years | (what your 2004 subdivision came with) |
| Quality vinyl | $650–$1,100 | 20–30 years | Milgard Tuscany/Trinsic |
| Fiberglass / composite | $900–$1,500 | 30–40 years | Milgard Ultra, Andersen 100 (Fibrex) |
| Clad-wood | $1,200–$1,800+ | 30–50 years | Andersen 400, Marvin Elevate/Signature |
Size, shape, and glass options move individual windows around inside those ranges: tempered glass (required near doors, tubs, and floors) adds $75–$150 per unit; triple-pane adds 10–20%; specialty shapes and bays go up from there.
The Five Things That Drive Your Quote
- Product tier. The biggest lever by far — see the table above.
- Insert vs. full-frame. Inserts reuse your existing frame and cost 15–30% less, but they hide frame rot and reduce glass area. Full-frame strips to the studs and redoes flashing and insulation properly. Past 25 years old, we usually recommend full-frame.
- Count and access. More windows drop the per-unit price. Second-story and walk-out basement openings add labor.
- Glass packages. Low-E is standard everywhere now; sun-control coatings for west exposures, sound packages near busy roads, and tempered safety glass all add per-unit cost.
- Who's selling. This is the quiet one. Some national replacement brands run commissioned in-home closes with a "sign tonight" discount — the first number includes room to drop 30%. Local dealers with annual pricing quote the real number first.
Where Not to Cheap Out
After 46 years of fixing other people's window jobs, our list is short and non-negotiable:
- Installation quality beats product tier. A mid-range window installed square, flashed correctly, and foamed properly outperforms a premium window slammed in crooked. Ask who actually does the install — employee crews or whoever subcontracted lowest this month.
- Flashing and waterproofing. Failed flashing doesn't show up for five years, and then it shows up as rotted framing. This is the main reason we do full-frame replacements with our own carpenters.
- NFRC numbers, not brochure claims. Every legitimate window has a tested U-factor and SHGC on an NFRC label. If a quote won't state them per unit, walk.
What Boise-Area Homeowners Should Budget
For planning purposes in the Treasure Valley: a 10-window ranch with quality vinyl lands around $8,000–$11,000; a 15-window two-story in fiberglass around $16,000–$22,000; a whole-house clad-wood job on a larger custom home $25,000–$40,000. Financing spreads any of those into a monthly number; ask us about current options.
Every Wood Windows quote is a firm written price after a free in-home measure — set annually, no games. Call (208) 376-2200 or use the form on this page.
Frequently Asked Questions
How much does it cost to replace windows in a whole house?
For a typical 10–15 window home, expect $8,000–$16,000 with quality vinyl, $14,000–$25,000 with fiberglass or composite, and $20,000–$35,000+ with clad-wood windows like Andersen 400 Series or Marvin. Those are installed prices including tear-out, insulation, flashing, and haul-away.
Why do window quotes vary so much between companies?
Three reasons: product tier (builder-grade vs. architectural line can differ 3× on the same opening), install method (insert vs. full-frame replacement), and sales model. High-pressure national brands build 40–50% commission and 'today-only discount' room into the first number. We set prices annually and quote firm numbers — the price doesn't depend on how well you negotiate.
Is full-frame replacement worth the extra cost over insert windows?
Usually, yes, if your frames are 20+ years old. An insert (pocket) window reuses the old frame — cheaper, but it hides any rot or bad flashing and shrinks your glass area. Full-frame replacement strips to the rough opening so insulation and waterproofing get done right. In Idaho's climate we recommend full-frame for most homes older than 25 years.
Do new windows actually pay for themselves in energy savings?
Not on utility bills alone — realistic savings run $200–$500 a year for a typical Treasure Valley home replacing failed single-pane or early dual-pane glass. The real return is comfort, resale (window replacement recoups roughly two-thirds of its cost at sale), and eliminating the water damage failed windows cause.
When is the cheapest time of year to replace windows?
Winter. Demand drops December through February, manufacturers run promotions, and install calendars are open. Windows are replaced one opening at a time — your home isn't exposed — and cold-weather installs are routine for experienced crews in Idaho.
Sources & Testing Data
Last reviewed 2026-07-04 by Wood Windows Inc — (208) 376-2200