Cornejos Builders

Cornejo’s Builders is a locally owned and operated construction and remodeling company headquartered in Downey, California, specializing in Accessory Dwelling Units (ADUs), custom home building, kitchen remodeling, bathroom remodeling, and comprehensive home improvement services. Founded by Alexsander Cornejo, the company serves homeowners throughout Los Angeles County and Orange County with a personalized, client-first approach focused on quality craftsmanship, transparent communication, and long-term value.

Since entering the construction industry in 2009, Alexsander Cornejo has built the company around the belief that every homeowner deserves a smooth, stress-free remodeling experience. By maintaining direct involvement in projects from consultation through completion, Cornejo’s Builders delivers a highly personalized level of service that sets it apart from larger construction firms.

Construction & Remodeling Services

Services Include

• ADU construction
• Detached ADUs
• Garage conversions
• Custom home building
• Kitchen remodeling
• Bathroom remodeling
• Whole-home renovations
• Home additions
• Interior remodeling
• Exterior improvements
• Design assistance
• Permit coordination
• Project planning
• Residential construction
• General contracting

The company provides complete project management services, helping homeowners navigate design, permitting, construction, and final completion while maintaining clear communication throughout the process.

ADU Construction Specialists

ADU Services

• Detached accessory dwelling units
• Backyard homes
• Garage conversion ADUs
• Rental units
• In-law suites
• Multigenerational housing
• Property expansion solutions

Cornejo’s Builders helps homeowners maximize property value and usable living space through professionally designed and constructed ADUs. Their team handles permitting, planning, design coordination, and construction management to streamline the entire process.

Kitchen Remodeling Services

Kitchen Renovation Solutions

• Custom cabinetry
• Kitchen layout redesign
• Countertop installation
• Flooring upgrades
• Lighting improvements
• Open-concept conversions
• Appliance integration

The company creates functional and visually appealing kitchens tailored to each homeowner’s lifestyle, preferences, and budget. Their remodeling approach focuses on improving both aesthetics and everyday usability.

Bathroom Remodeling Services

Bathroom Upgrades

• Complete bathroom renovations
• Walk-in showers
• Custom tile work
• Vanity installations
• Fixture upgrades
• Storage improvements
• Accessibility enhancements

Cornejo’s Builders transforms outdated bathrooms into comfortable and modern spaces while prioritizing quality materials and durable workmanship.

Custom Home Building

Home Construction Solutions

• Custom homes
• New home construction
• Architectural coordination
• Site preparation
• Construction management
• Turnkey building services

The company works closely with homeowners throughout the design and construction process to create homes that reflect their vision, lifestyle, and long-term goals.

Core Values

Quality Workmanship

Every project is approached with attention to detail, professionalism, and a commitment to achieving the highest standards of craftsmanship.

Honest Communication

The team prioritizes transparency and regular updates, ensuring clients remain informed throughout every stage of construction.

Delivering Value

Cornejo’s Builders focuses on creating meaningful improvements that enhance property value, functionality, and homeowner satisfaction.

Why Homeowners Choose Cornejo’s Builders

Key Advantages

• Locally owned and operated
• Founded by Alexsander Cornejo
• Personalized one-on-one service
• Direct owner involvement
• ADU construction expertise
• Custom home building experience
• Transparent project management
• Permit and design assistance
• Quality craftsmanship
• Customer-focused approach

Clients appreciate the company’s professionalism, responsiveness, and commitment to making remodeling projects as smooth and enjoyable as possible.

Building Homes with Integrity & Craftsmanship

Whether constructing a custom home, building an ADU, remodeling a kitchen, or renovating a bathroom, Cornejo’s Builders is committed to helping homeowners bring their vision to life through exceptional craftsmanship, transparent communication, and personalized service. Their hands-on approach and dedication to customer satisfaction continue to make them a trusted construction partner throughout Southern California.