Room Addition / ADU (JADU) Construction in San Marcos

Why Room Additions & ADUs Matter

Room additions and ADUs (including JADUs) provide extra space, improve functionality, and increase property value. Whether you want a guest suite, rental unit, or home workspace, these additions allow you to expand your home without relocating. With the right planning and team, the project becomes well-organized and stress-free.
San Marcos homes often feature modern suburban layouts, family-focused designs, and open floor plans—perfect for room expansions and ADUs.

Why San Marcos Homeowners Choose Us

We offer strong local experience, detailed planning, and smooth communication for homeowners throughout San Marcos.

What Makes Us Your Best Choice

Knowledge of local ADU regulations

Skilled architects & engineers

Consistent communication

Dedicated project coordinator

Budget-friendly service options

High-quality 3D visualization tools

Our Smooth Room Addition & ADU Planning + Construction Process

Consultation & Planning

We discuss your ideas, examine your space, and develop a clear plan based on your needs and budget.

Design & Layout Coordination

Our designers prepare accurate 3D visuals, architectural plans, and engineered layouts tailored to San Marcos homes.

Final Plans, Approvals & Build Preparation

We finalize drawings, ensure full compliance, and prepare your entire project for construction.

What We Provide in Our Room Addition & ADU Service

At Golden Shore Design and Build, we don’t just renovate Houses — we transform them into functional, beautiful spaces tailored to your lifestyle. Here’s why so many homeowners trust us with their Home remodels:

3D Renderings & Visual Concepts

Realistic previews that show your completed space.

Architectural Floor Plans

Accurate layouts, detailed elevations, and measurements.

Structural Engineering Plans

Safe and compliant structural designs.

Electrical, Plumbing & Mechanical Layouts

Full coordination of all essential building systems.

Permit-Ready Documents

Plans crafted for fast approval.

Our Recent Testimonials

Services Areas

Ready to Start Your San Marcos Room Addition or ADU Project?

We provide complete planning, 3D modeling, and engineering for room additions, ADUs, and JADUs tailored for San Marcos homes. Contact us today for a free consultation and start expanding your home confidently.

Google Yelp

Overall Rating

5.0
★★★★★

63 reviews