Service 04 • Conversion Specialist
Garage to ADU Conversion in Orange County.
Convert your underutilized 2-car garage into a legal, permitted 1-bedroom or studio living space. Because the existing foundation and framing are utilized, garage conversions offer the fastest timeline and highest cost efficiency in Orange County.
Typical Timeline
10 to 14 Weeks Build Time
City Permits
100% In-House
Contractor License
Class B Alliance
2026 COST BREAKDOWN • LINE-ITEM TRANSPARENCY
Estimated Line-Item Costs for Garage to ADU Conversion
Real budget allocations across architectural drawings, city permit fees, utility trenching, and turnkey construction in Orange County.
| Cost Component | Typical Range | Key Details & Code Notes |
|---|---|---|
| Architectural Plans & Structural Engineering | $6,000 - $9,500 | Includes Title 24 energy calculations & 3D renderings |
| Municipal Plan Check & City Permit Fees | $2,500 - $5,000 | Exempt from school impact fees if under 500 sq ft |
| Plumbing Trenching & Sewer Utility Connection | $8,000 - $18,000 | Independent subpanel & dedicated water tie-in |
| Structural Foundation & Framing Scope | $35,000 - $85,000 | Engineered slab pour or garage envelope retrofit |
| Interior Finishes, Kitchen & Bath Turnkey | $28,000 - $55,000 | Quartz counters, mini-split HVAC & custom cabinetry |
SCOPE SPECIFICATIONS
What's Included in Your Single-Contract Scope
Zero yard space sacrificed & existing envelope repurposedFull architectural compliance and licensed Class B construction oversight.
No replacement parking required under California state lawFull architectural compliance and licensed Class B construction oversight.
Plumbing trenching, soundproof insulation & drywalled interiorFull architectural compliance and licensed Class B construction oversight.
Fastest municipal permitting and construction timelineFull architectural compliance and licensed Class B construction oversight.
Request Your Garage to ADU Conversion Quote
Get exact line-item estimates and municipal permit review details for your property within 1 business day.
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