Looking for ADU Builders in Costa Mesa?
Compare 21 builders in Costa Mesa. Average rent: $3,141/month. Find the right builder for your ADU project.
21
Contractors
$3K
Average Rent /mo
$1.4M
Avg Home Value
Companies & Contractors serving close to Costa Mesa
Top-rated professionals serving Costa Mesa and neighboring areas in Orange County
Anders Lasater Architects
Top Investment Neighborhoods
Highest rental yields in Costa Mesa by ZIP Code
ZIP 92627
Highest Return
ZIP 92626
Top ZIP Codes by Rent in Costa Mesa
Neighborhoods with the highest average rental rates
92627
92626
Costa Mesa Real Estate Market
Easy to understand market data to help you make informed ADU investment decisions.
Based on aggregated market data from multiple housing platforms and public records
Average Rent
Monthly rental price
$3K
Average Home Value
Property valuation
$1.4M
Market Analysis
Costa Mesa shows strong rent growth of 4.0% over the past 12 months. Home values have increased by 2.1%, making ADU investment a strategic choice for homeowners.
Projected Property Value
Current market analysis for Costa Mesa indicates a 0.9% increase in property values over the next 12 months.
Similar Cities to Costa Mesa
Cities with similar market characteristics for comparison
California State ADU Standards
These are the guaranteed rights for homeowners in Costa Mesa under California State Law. Local agencies cannot enforce stricter standards than these baselines.
State law prohibits local agencies from setting limits below 850 sq. ft. (1 bd) or 1,000 sq. ft. (2 bd). Generally, up to 1,200 sq. ft. is allowed subject to setbacks.
Local agencies cannot require rear or side setbacks of more than 4 feet.
Minimum allowed height limit. Some areas allow up to 18-25ft depending on proximity to transit or main house.
No parking required if ADU is within 1/2 mile of public transit, historic district, or part of existing home footprint.
State law currently prohibits owner-occupancy requirements for ADUs permitted between 2020 and 2025.
Development impact fees are waived for ADUs smaller than 750 sq. ft. For larger units, fees must be proportional.
* While these state laws provide a baseline, always verify specific local overlay zones or fire safety regulations with the Costa Mesa planning department.
Building ADUs in Costa Mesa
Looking for the right ADU builder in Costa Mesa? Our directory features 21 builders serving Orange County and surrounding areas.
Compare portfolios, read reviews, and connect with professionals who understand the local market. With average rent at $3,141/month, ADU investment in Costa Mesa offers strong potential.
Frequently Asked Questions about ADUs in Costa Mesa
Common questions from local homeowners
ADU construction costs in Costa Mesa typically range from $250-$400 per square foot for standard construction. For a 500 sq ft unit, this translates to $125,000-$200,000. Garage conversions are usually more affordable, often costing 30-50% less than new detached construction.
ROI Intelligence
Investment insights for Costa Mesa
Market Rent
$3K/mo
Est. Annual Income
$36K
Est. ROI
16.0%
Monthly Cash
$3K
Value Growth (12m)
+2.1%
*Estimates based on average ADU size (800 sqft) and construction costs ($200K). Actual results may vary. Use calculator for personalized analysis.