United Builders is a family-owned contractor focused on high-quality window and door replacement for Southern California homeowners who want the job done right the first time. We’re owner-led and referral-driven, known for professionalism, clear expectations, and clean finished results. With 20+ years in business, 30+ years of hands-on experience, and more than 10,000 completed projects, we’ve built a reputation by doing the work carefully and standing behind it. We install Anlin windows and doors for their locally manufactured quality and industry-leading warranty support. We’re also licensed as a California General Contractor and glazing contractor under CSLB #841148, which means we can handle the carpentry and finish work that often comes with replacement projects. Fewer handoffs. Better accountability. A finished look that stays consistent across the home, including in HOA communities.