Pre-Owned Windows for Sale
Pre-owned casement, picture & oversized windows — unused & open-box from canceled projects
What's in this collection?
Collection includes 57 pre-owned, open-box and unused window listings — casement, picture, sliding and fixed units in standard and hard-to-find oversized sizes, from Andersen, Marvin, Jeld-Wen, Milgard and Western Windows. Most are new or unused leftovers from canceled or over-ordered projects, with discontinued and customer-returned windows added as they arrive. Both replacement and new-construction units surface here, in aluminum and clad-wood frames with original hardware and components. Listed from cities across the US — Sahuarita, AZ, Franklin Square, NY and Bartlesville, OK — most from $150 to $4,900, with shipping.
Updated October 23, 2026
How much can I save?
Conditions & Discounts
Windows are priced by model age, condition, and brand. Not every listing includes a comparable retail price — typical savings vs. new are shown below.
| Condition | Items | Typical savings vs. new |
|---|---|---|
| Pre-owned New | 30 | 25–45% off |
| Pre-owned Open Box | 6 | 35–55% off |
| Pre-owned Excellent | 4 | 45–65% off |
| Other / Outlet / Discontinued | 7 | — |
Savings ranges are typical across Unbuilt relative to the equivalent item new at retail; individual listings vary.
Want more discounts?
- Make an offer — many listings accept offers; look for the Make an Offer button on the item.
- Trade or design pro? Tell us about your business — we're building a trade program.
Where are they from?
Sources & Authenticity
Sold by Unbuilt
Sourced from designers, builders, and authorized dealers — unused project leftovers, showroom samples, and open-box returns. Every item is verified authentic by our team and returnable within 30 days (see our returns policy).
Community Listings
Posted directly by members of the Unbuilt community. Confirm condition, authenticity, and return terms with the seller before you buy — terms vary by listing.
Buying pre-owned on Unbuilt
- Inspect the photos and condition notes on every listing.
- Message the seller with questions before you buy.
- Every item lists its condition, so you know exactly what you're getting.
Shipping & pickup
- Can windows ship to me?
- Most listings ship nationwide, with freight for oversized items where noted.
- Is local pickup available?
- Yes, where noted on the item — Franklin Square, NY has the most inventory.
- See full shipping details.
Highlights
- Andersen, Marvin, Pella & Jeld-Wen
- Replacement & new construction
- Hardware & components
- Aluminum & clad wood
Top Categories
Locations
- Sahuarita, AZ (4) · shipping
- Franklin Square, NY (3) · local pickup or freight
- Bartlesville, OK (2) · shipping
- Little Rock, AR (2) · shipping
Sell with us
Got Extra Windows?
You can earn money, save waste and help your community by reselling them on Unbuilt.
Learn howBuild better
Making an Impact
Building materials consume half of all natural resources extracted globally each year. By shopping secondhand on Unbuilt, you're supporting a movement to make building more affordable and sustainable.
Learn about your impact
