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What to look for on a window quote
Window quotes are often priced per window without clear spec breakdown — which hides the huge price differences between vinyl and fiberglass, double vs triple-pane, and true replacement vs new-construction. A good quote line-items the window specs, installation method, and warranty terms.
Exact count, with sizes. Standard double-hung vs picture vs casement all price differently.
Andersen 400 Series, Pella Reserve, Marvin Elevate, Milgard Trinsic. Brand + product line lets you verify glass package, frame material, and warranty.
Vinyl (cheapest, $300–$600/window installed), wood-clad (premium, $700–$1,400), fiberglass ($500–$900), or aluminum (commercial).
Double-pane + Low-E + argon is standard. Triple-pane adds $150–$300/window; worth it in Zone 5+ climates.
Energy Star rating. U-factor measures insulation (lower = better); SHGC measures heat gain (higher = warmer in winter, higher = hotter in summer).
True replacement (remove existing + install new insert in existing frame) vs full-frame (remove everything including frame). Full-frame is better for rotted or leaking windows; costs $200–$500 more per window.
Interior trim stain/paint match, exterior cladding color, flashing/wrap around frame.
Required in some jurisdictions for structural openings or egress changes.
Frame: 10–20 yrs (vinyl/fiberglass) to 25+ (premium). Glass seal: 20 yrs typical. Workmanship: 1–10 yrs.
Red flags in a window quote
Quote says "lifetime warranty windows" without naming the brand. Could be anything from premium Pella to discount Jeld-Wen — both can claim lifetime warranty in fine print.
True replacement (insert over existing frame) vs full-frame removal matters. If your existing frame is rotten, insert replacement traps the rot and shortens window life.
If the quote doesn't specify U-factor and SHGC, you can't verify energy savings claims. Quality quotes come with NFRC performance labels.
Many lifetime warranties are non-transferable at resale, which reduces home value. Check transferability and what "lifetime" actually covers (just the frame? the glass? labor?).
Radio and TV "$199 installed" offers are almost always 3-tab vinyl windows with minimum glass packages and no capping. Full cost for quality windows is $600–$1,200 installed.
Proper window installation requires flashing tape and exterior wrap to prevent water intrusion. If missing from scope, expect water damage in 3–5 years.
Large window companies (Renewal by Andersen, Pella, etc.) often use in-home presentations with "today only" pricing to prevent comparison shopping. Legitimate pricing holds for 30 days.
Common hidden costs and change orders
These items are often missing from the initial window quote and show up later as change orders or surprise fees. Ask about each before signing.
- Lead paint testing / abatement on pre-1978 homes ($200–$1,500)
- Rot repair around window openings ($200–$800 per window)
- Interior trim replacement if not included ($50–$150/window)
- Exterior stucco or siding patching ($100–$500/window)
- Egress code compliance on bedrooms (size upgrades)
- Permit + inspection in some jurisdictions
- Screen replacement if not specified