About Lamarc Prime Builders
Lamarc Prime Builders is a licensed design-build contractor serving Orange County, California. We specialize in Accessory Dwelling Units (ADUs), garage conversions, home additions, remodeling, and residential construction.
From initial planning and architectural design to city permitting and construction, we manage every stage of your project. Our approach emphasizes code compliance, quality craftsmanship, transparent communication, and practical solutions that enhance your property's long-term value.
Our Services
We design and build code-compliant ADUs and garage conversions that add flexible living space and long-term property value, handling everything from planning and permits to construction.
Our home additions seamlessly expand your living space while integrating with your existing structure, improving layout, functionality, and long-term usability.
We remodel kitchens and bathrooms with thoughtful layouts, quality finishes, and precise construction—transforming essential spaces into functional, comfortable environments.
From targeted upgrades to larger improvements, we enhance your home’s comfort, efficiency, and overall value with professional craftsmanship and clear project management.
We transform outdoor and exterior spaces—backyards, facades, and living areas—into well-designed extensions of your home built for everyday enjoyment.
Our team manages ground-up residential construction, delivering custom homes through a streamlined design-build process focused on quality, planning, and execution.
We handle architectural planning, zoning coordination, and permit approvals—ensuring your project is properly designed, compliant, and ready to build.
How Much Does an ADU Cost in Orange County?
ADU costs in Orange County vary depending on size, design, site conditions, utilities, and finishes. Garage conversions are generally more affordable, while detached ADUs require additional construction and utility work. A preliminary ADU feasibility review can help homeowners understand potential costs, plan their budget, and avoid unexpected expenses during permitting and construction.
Detached ADU
Typically $200,000 to $350,000
Larger / Custom ADU
Typically $300,000 to $450,000+
Garage Conversion
Typically $100,000 to $150,000
Estimated project costs only, not a final quote. Actual pricing depends on your property, design, and project requirements. City permit fees are paid separately by the homeowner, and a contingency budget is recommended for unexpected costs.
Built for Quality.
Managed with Care.
An ADU is a major investment—so we focus on the details that protect it: solid planning, clean execution, and communication that stays consistent throughout the build.
Whether you’re adding space for family, creating a rental unit, or converting an existing structure, our team works to deliver a code-compliant ADU that feels intentional, functional, and built to last.
A Clear Process You Can Trust
From your first site evaluation to final walkthrough, we keep your ADU project organized and transparent. You’ll know what happens next, what to expect, and how each step moves forward—so you can make confident decisions without the usual construction stress.
Permits Made Simple
We guide you through zoning and permits with local Orange County experience—so approvals feel less overwhelming.
ADU-Focused Expertise
We specialize in ADUs and garage conversions, with a process built for clarity, code compliance, and long-term value.
Why Lamarc Prime Builders Is the Right Choice for Your ADU
Our Proven ADU Process
Each ADU project follows a structured process that guides homeowners from initial evaluation through completed construction with clarity and confidence.
01
Free Preliminary ADU Consultation
We evaluate zoning, setbacks, utilities, and feasibility to confirm what’s possible on your property.
02
Design & Planning
We create efficient layouts and plans tailored to your goals, budget, and local requirements.
03
Permits & City Approval
Our team manages plan submittals, revisions, and city coordination to secure approvals.
04
Construction & Completion
Professional construction, inspections, and final sign-off deliver a completed ADU.
ADU Construction & Remodeling Services
Across Orange County
Lamarc Prime Builders proudly serves homeowners across Orange County including surrounding Cities approximately 25 miles of Anaheim, California. We provide ADU design, permitting, construction, and residential remodeling services tailored to local requirements.
