Keystone Windows & Doors of Seattle

Lots of companies sell windows. Only one window and door company delivers the Keystone brand of service, communication, responsibility, and product quality.

Keystone Windows & Doors began 20 years ago as a family-owned and operated business experiment. If an owner went out and met with every customer, sold only top quality windows and doors, hired her own expert craftsmen to install them instead of subcontractors, and took direct responsibility for every project, we wondered: would it make a difference here in western Washington? Would anyone notice?

When we got more referrals than we (temporarily) could handle, we saw the answer was yes. Although we’ve grown and opened a Seattle showroom, we’ve done business that way ever since. Leading with quality, service, and responsibility.

Keystone specializes in wood, vinyl, aluminum and fiberglass windows, door retrofitting and remodeling. We’ll be your design consultant and help bring your dreams to life. Project estimates are always free. We install the best brands of custom windows and doors with the old-fashioned craftsmanship you and they deserve.

Every job is estimated at no charge and overseen by Keystone owners to insure quality workmanship. We’re licensed, bonded and insured in compliance with all Washington state laws. There are bigger places to buy windows and doors, but none that work harder to earn your confidence. We’d love a chance to prove it to you. Contact us.

Keystone Windows & Doors General Contractor's License: #KEYSTWD9840L
Contractor's Bond ($12,000) Bond #SB6893 with CBIC
Insurance ($1,000,000) Commercial
Liability/Property Damage Policy # PFK029258 with McDonald Ins. Group Inc.

Keystone Windows & Doors
2215 4th Ave. S, Seattle - Phone: 206.860.8686