Expert ADU Builders in San Marcos
Maximize your San Marcos property’s value with custom Accessory Dwelling Unit solutions expertly designed and built by Classic Home Contractors, North County’s trusted ADU specialists.

Transform Your Property with Professional ADU Construction in San Marcos
San Marcos’ growing housing demand and recent California ADU legislation make now the perfect time to invest in an Accessory Dwelling Unit for your property. Professional ADU construction can increase your property value by up to 30% while generating potential rental income of $1,500-$2,500 monthly depending on size and location within San Marcos.
Classic Home Contractors combines architectural expertise with construction excellence to create ADUs that balance functional living spaces with seamless integration into your existing property. We understand the specific considerations for ADU projects in San Marcos, including permitting requirements, zoning regulations, utility connections, and designs that complement both your main residence and neighborhood aesthetic.
Our Comprehensive ADU Services for San Marcos
- Custom ADU Design – Personalized layouts optimized for your specific property and needs
- Garage Conversions – Transform existing structures into efficient living spaces
- Detached ADUs – Stand-alone units that maximize privacy and rental potential
- Attached ADUs – Seamlessly integrated additions that share walls with your main home
- Junior ADUs (JADUs) – Smaller units within existing homes for maximum affordability
- Multi-Story ADUs – Space-efficient solutions with minimal footprint for smaller lots
- Permitting & Approval – Expert navigation of San Marcos and California ADU regulations
- Site Preparation – Professional grading, foundation work, and utility connections
- Full-Service Construction – End-to-end project management from concept to completion
The Classic Home Contractors ADU Advantage
Our San Marcos ADU projects begin with thorough site analysis and collaborative design consultation. We evaluate factors including lot topography, existing structures, privacy considerations, and circulation patterns to develop ADU plans that maximize both functionality and aesthetic appeal.
Our experienced team handles every aspect of ADU development including:
- Comprehensive feasibility assessment
- Custom architectural design
- Engineering and structural planning
- San Marcos permitting navigation
- Site preparation and foundation work
- Full construction management
- Interior finishing and custom features
- Final inspections and occupancy certification
Our ADU design and construction services are available throughout San Marcos including San Elijo Hills, Discovery Hills, Richland, Twin Oaks Valley, San Marcos Creek District, and all surrounding communities. As your local San Marcos ADU specialists, we understand the distinctive permit requirements, neighborhood guidelines, and design expectations of each area.

Start Your ADU Project in San Marcos Today!
Ready to transform your property with a professional Accessory Dwelling Unit? San Marcos homeowners trust Classic Home Contractors for design expertise, quality construction, and exceptional craftsmanship.
Call Now or Fill Out Our Form to Get a Free San Marcos ADU Consultation and Estimate!
REAL STORIES FROM SATISFIED CUSTOMERS



Family-owned and proudly serving San Marcos
About Us
With our expertise, backed by decades of experience in home remodel and project management, you’re never alone on this journey.
We understand the details of the field and the importance of effective communication, and the importance of respecting your budget and timeline.
Together, we’ll turn your dream home into reality with less stress and more joy.
Our goal is to ensure your journey is not only successful but also an exciting and fulfilling experience every step of the way.


We believe every home has a story and a vision waiting to be realized. Our motto, “Dreams Come True” represents our commitment to turning your ideas into reality.
We are here to help you create the home you’ve always dreamed of.
Contact Us
Reach out today to discuss your ideas and how we can assist you in creating the home of your dreams.