Summary: Summary: A whole-house window replacement of 10 to 15 windows costs $7,000 to $18,000 in 2026 for standard vinyl, $12,000 to $25,000 for fiberglass, and $15,000 to $35,000 for wood. Contractors typically price whole-house jobs 10 to 20 percent under per-window math. Most jobs finish in 1 to 2 days. Plan the project in fall or winter for the best scheduling, do the worst elevations first if phasing, and never pay in full before the final walkthrough.
For the most common project, 10 to 15 standard double-hung windows, 2026 pricing clusters as follows. Vinyl: $7,000 to $18,000 depending on window sizes, glass options, and install type. Fiberglass: $12,000 to $25,000. Wood or wood-clad: $15,000 to $35,000. These assume insert installation; full-frame adds about 25 percent. Bay, bow, and large picture windows are priced individually on top.
The volume discount is real: mobilization, dumpster, and crew setup are fixed costs spread across more windows, so per-window cost falls 10 to 20 percent versus doing a few at a time. This is also why phasing a whole house into two projects costs more total than doing it once: you pay mobilization twice and lose the package price.
Start with an inventory: count every window, note sizes, styles, and condition, and rank them by need. South and west elevations usually suffer most from sun; bathrooms and kitchens suffer most from moisture. If budget forces phasing, do the worst elevation completely rather than scattering a few windows everywhere: a finished elevation looks intentional, a scattered mix looks unfinished.
Decide insert versus full-frame per opening, not per house: sound frames get inserts, rotted frames get full-frame. Photograph every opening and keep the inventory with your quotes. When all three bidders price the same inventory, the quotes compare cleanly and the outlier, high or low, is obvious.
A professional crew installs 10 to 15 same-size windows per day, so a 12-window house is typically a 1 to 2 day job. Full-frame installations run slower: 6 to 10 per day. Custom sizes, bay windows, and second-story work extend the schedule. From signed contract to installation day, allow 4 to 8 weeks for standard sizes and 8 to 12 weeks for custom orders.
Disruption is moderate but real: crews work room by room, so plan to be out of each room as they cycle through. Move furniture away from windows, take down curtains and blinds, and protect valuables from dust. Good crews lay drop cloths, vacuum as they go, and haul every old window away the same day. Confirm cleanup standards in writing before the job starts.
Fall and winter are the best scheduling windows: installers are less booked than in spring, and you may get off-season pricing. Avoid the spring rush if you can. The contract should name the exact window line, glass package, install type per opening, trim and disposal terms, start and completion dates, and warranty terms (manufacturer and workmanship separately).
Payment structure: a deposit of 20 to 30 percent is normal for custom orders; never pay more than half upfront, and hold the final 10 to 20 percent until your walkthrough is complete and you have the warranty paperwork. Be present for the final walkthrough: test every window's operation, check locks and screens, and inspect trim and caulking inside and out before releasing final payment.
Keep every piece of paper: the contract, the NFRC labels or spec sheets, and the warranty registrations. Register manufacturer warranties promptly: some require registration within 30 to 90 days to activate full terms. Note the installer's workmanship warranty length (1 to 2 years is typical; 5-plus is excellent) and what triggers it.
Maintain the investment lightly: clean tracks and weep holes annually, check exterior caulking each fall, and operate every window twice a year so hardware never seizes. For wood interiors, follow the manufacturer's finishing schedule. Small maintenance preserves both the windows and the warranties that cover them.
Data current as of October 2026. Sources: Pella, Fixr, and contractor pricing data. Estimates only, not a quote. Always get multiple written quotes from licensed local window installers.