Business Details
50+ Years
experience
Emergency
services
Expert Window & Door Installation Services in Simi Valley
Since 1969, Preferred Glass & Windows has been a trusted leader in glass and window installation, repair, and replacement across Southern California. Our AAMA-certified installers bring decades of combined experience, delivering premium products from brands like Milgard and Western Window Systems. We pride ourselves on exceptional craftsmanship, offering lifetime guarantees on all installations and 24-hour emergency board-up services. Recognized by the LA Daily News and Ventura County Star as the #1 Glass & Window Store, our team prioritizes customer satisfaction through personalized service and energy-efficient solutions.With showrooms in Simi Valley and service areas spanning from Malibu to Ventura County, we combine local expertise with industry-leading standards. Our commitment to quality is reflected in our 60% referral-based business and partnerships with top-tier manufacturers. Fully insured and bonded since 1969, we ensure every project meets strict safety codes while enhancing property value through innovative glass solutions.
Services
Window Replacement
Door Installation
Skylight Services
Commercial Glass
Shower Enclosures
Details
- Year established: 1969
Highlights and features
- 50+ years of local expertise in Southern California
- AAMA-certified installation professionals
- Lifetime guarantee on all workmanship
- 24-hour emergency board-up service available
- Award-winning service recognized by LA Daily News
Associations and certifications
- AAMA (American Architectural Manufacturers Association)
What people say
Best window company in Conejo Valley
Punctual and courteous technicians
Saved money through efficient installation
Perfect custom stained glass doors
Lifetime guarantee assurance
Services
Window Replacement
Our window replacement services enhance energy efficiency and property value through premium vinyl, wood, and fiberglass installations. We use high-performance glass that reduces noise pollution and lowers energy bills by up to 15%. With same-day installations and a lifetime guarantee, our AAMA-certified technicians ensure minimal disruption while delivering durable solutions tailored to residential and commercial needs.
Door Installation
We specialize in entry door installation featuring wood, fiberglass, and steel options that combine security with aesthetic appeal. Our one-day installations include energy-efficient designs that maintain indoor climate control while adding curb appeal. All projects come with a lifetime warranty, ensuring long-term durability against Southern California's climate conditions.
Shower Enclosures
Custom frameless and framed shower enclosures are crafted from tempered glass with optional protective coatings. Our designs meet American Glass Association safety standards while offering styles like clear, frosted, and etched glass. Installations include lifetime guarantees and 10-year warranties on water-resistant treatments, enhancing both functionality and modern aesthetics.
Commercial Glass
We provide commercial glazing solutions including storefront replacements, security glass, and solar film applications. Our services address vandalism repair, energy efficiency improvements, and safety compliance for businesses. 24-hour emergency board-up services ensure minimal operational disruption, while tinting options reduce UV damage and cooling costs by up to 79%.
Skylight Services
Skylight installations from Solar Industries and Velux bring natural light into residential and commercial spaces. Our systems improve indoor ambiance while maintaining energy efficiency through insulated glass units. Professional installation ensures leak-proof integration with existing roofing structures, enhancing both property value and occupant well-being.
People
Allen R. Mak
President & Owner
With over 40 years in the industry since joining in 1974, Allen R. Mak leads with expertise in glazing compliance and project management. He ensures quality control across all installations while maintaining partnerships with premium manufacturers.
Tyler
Lead Installer
Certified AAMA technician specializing in complex window and door installations. Known for precision workmanship and customer-focused problem-solving, Tyler has completed over 1,000 residential projects in the Conejo Valley region.
Questions
Do you offer emergency glass repair services?
Yes, we provide 24-hour board-up services for broken glass emergencies with same-day assessment and replacement scheduling.
What areas do you serve?
We serve all of Southern California including Simi Valley, San Fernando Valley, Ventura County, and Los Angeles County.
Are your installers certified?
All technicians are AAMA-certified with ongoing training in the latest installation techniques and safety standards.
Do you provide warranties?
We offer lifetime guarantees on all installations and 10-year warranties on protective glass coatings and treatments.
Can you match existing window styles?
Our team specializes in replicating existing styles while using modern materials to ensure seamless integration with your property.
Do you work with commercial clients?
Yes, we handle commercial storefronts, security glass installations, and energy-efficient tinting solutions for businesses of all sizes.
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