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Financing to qualified customers at an unbeatable, 12-84 month, interest-free offer.
Price Promise Assurance
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Why SoCal Homeowners Choose Window Design Group as Their Milgard Authorized Dealer
Milgard is California’s #1 replacement window manufacturer — and Window Design Group is one of the longest-tenured Milgard authorized dealers in Southern California. We’ve installed Milgard windows since the company was a regional player in the 1980s, and we know every product line: Tuscany Series (premium vinyl, our most-installed), Style Line (contemporary), Trinsic (architectural), Aluminum, and Ultra fiberglass. As an authorized dealer, we offer manufacturer-direct pricing, factory-trained installation, and Milgard’s industry-leading lifetime warranty — including the Full Lifetime Warranty for original homeowners that covers parts AND labor for as long as you own the home.
For over 60 years, Window Design Group has been the trusted name in replacement windows across Southern California. As a family-owned business since 1960, we’ve helped thousands of homeowners in Los Angeles, Ventura County, and Orange County upgrade their homes with energy-efficient, beautifully crafted windows that last a lifetime.
Unlike big-box retailers, every window installation is handled by our own factory-trained crews — never subcontracted. That’s why we can stand behind our work with a lifetime warranty on both products and labor. Our customers consistently rate us 4.8+ stars across Google, Yelp, and the BBB, where we hold an A+ accreditation.
Whether you need vinyl replacement windows, energy-efficient double-pane windows, slider windows, or casement windows, we carry top brands at wholesale pricing — and pass the savings directly to you. Our current promotion offers 40% off premium replacement windows plus 0% interest financing for up to 84 months, making it easier than ever to invest in your home’s comfort, curb appeal, and energy savings.
What Sets Us Apart
- Family-Owned Since 1960 — Three generations of window expertise, not a franchise
- BBB A+ Accredited — Consistently top-rated with zero unresolved complaints
- CSLB Licensed & Insured — California Contractors State License Board verified (Lic. #993370)
- Lifetime Warranty — Covers both product defects and installation labor
- Price Promise Guarantee — We’ll match or beat any comparable written estimate
- Free In-Home Consultations — No pressure, no obligation, just expert advice
- 0% Financing Available — Affordable monthly payments from 12 to 84 months
Serving Los Angeles, Ventura & Orange County
Window Design Group proudly serves homeowners throughout Southern California, including:
Los Angeles County: Los Angeles, Burbank, Glendale, Pasadena, Santa Clarita, Woodland Hills, Encino, Sherman Oaks, Northridge, Calabasas, Malibu, West Hollywood, Beverly Hills, Culver City, Torrance, Long Beach, Downey, Whittier, Arcadia, Alhambra, and surrounding communities.
Ventura County: Simi Valley, Thousand Oaks, Moorpark, Camarillo, Oxnard, Ventura, Newbury Park, Westlake Village, Agoura Hills, Oak Park, and surrounding communities.
Orange County: Anaheim, Irvine, Huntington Beach, Newport Beach, Costa Mesa, Fullerton, Orange, Tustin, Mission Viejo, Lake Forest, Laguna Niguel, San Clemente, Yorba Linda, Brea, and surrounding communities.
Not sure if we serve your area? Call us at (800) 577-0643 — we’re happy to check and schedule a free consultation if you’re within our service area.
Why WDG for Milgard
We’re not just a contractor who installs Milgard — we’re an authorized dealer with direct manufacturer relationship, factory-trained installers, and access to Milgard’s full color, finish, and configuration options. We hand-measure every opening (Milgard’s tolerance specs require it), use Milgard’s recommended install techniques, and submit warranty registrations for you. As an installer-dealer (not big box), we provide single-point accountability: if anything’s wrong, you call us — we don’t pass you to a manufacturer hotline. That’s the difference between “we sell Milgard” and “we ARE the Milgard installer for SoCal.”
Replacement Window FAQs
How much do replacement windows cost in Southern California?
The cost of replacement windows depends on the window style, material, and size. At Window Design Group, our vinyl replacement windows start at competitive prices with our current 40% off promotion. We offer free in-home estimates so you get an exact quote for your project — no hidden fees, no surprises. Plus, with 0% financing for up to 84 months, monthly payments can be surprisingly affordable.
How long does window replacement take?
Most window replacement projects are completed in just one day. Our factory-trained installation crews work efficiently while maintaining the highest quality standards. For whole-home window replacements (10+ windows), the project typically takes 1-2 days. We’ll give you an exact timeline during your free consultation.
What types of replacement windows do you offer?
We carry a full range of window styles including double-hung windows, slider windows, casement windows, picture windows, bay windows, and garden windows. All of our windows are available in vinyl and come with energy-efficient double-pane Low-E glass to help reduce your utility bills. We also offer custom sizes and configurations for non-standard openings.
Are your replacement windows energy-efficient?
Yes. All of our replacement windows feature Low-E coated, argon-filled dual-pane glass that meets or exceeds California’s Title 24 energy requirements. Many of our customers see a noticeable reduction in their energy bills after upgrading from single-pane or aging aluminum windows. Our windows also carry the ENERGY STAR certification.
Do you offer a warranty on replacement windows?
Absolutely. Window Design Group provides a lifetime warranty that covers both the window product and the installation labor. This is one of the strongest warranties in the industry — and because we’re a family-owned company that’s been in business since 1960, you can trust we’ll be here to honor it.
What does the Milgard Full Lifetime Warranty actually cover?
For original homeowners: parts AND labor for as long as you own the home — including IGU seal failure, frame defects, hardware, screens, and our installation labor. Transferable to one subsequent owner with reduced coverage.
Are Milgard windows really better than other vinyl windows?
Milgard manufactures in California (shorter supply chain, faster fulfillment, climate-tested for CA conditions), uses higher-grade vinyl extrusion than most competitors, and offers the strongest warranty in the industry. After 60 years of installs, we recommend them.
Can you match Milgard frame finishes to my home?
Yes. Milgard offers 8 standard frame colors plus custom paint-matching for some product lines. White, tan, almond, bronze, and dark frames available across product lines.
