Looking for ADU Builders in Fairfax?
Compare 15 builders in Fairfax. Average rent: $2,650/month. Find the right builder for your ADU project.
15
Contractors
$3K
Average Rent /mo
$1.1M
Avg Home Value
Companies & Contractors serving close to Fairfax
Top-rated professionals serving Fairfax and neighboring areas in Marin County
Top Investment Neighborhoods
Highest rental yields in Fairfax by ZIP Code
ZIP 94930
Highest Return
Fairfax 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
$1.1M
Market Analysis
Fairfax shows stable market conditions over the past 12 months. Home values have changed by 0.5%, making ADU investment a strategic choice for homeowners.
Projected Property Value
Current market analysis for Fairfax indicates a -1.6% increase in property values over the next 12 months.
Similar Cities to Fairfax
Cities with similar market characteristics for comparison
California State ADU Standards
These are the guaranteed rights for homeowners in Fairfax 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 Fairfax planning department.
Building ADUs in Fairfax
Looking for the right ADU builder in Fairfax? Our directory features 15 builders serving Marin County and surrounding areas.
Compare portfolios, read reviews, and connect with professionals who understand the local market. With average rent at $2,650/month, ADU investment in Fairfax offers strong potential.
Frequently Asked Questions about ADUs in Fairfax
Common questions from local homeowners
ADU construction costs in Fairfax 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 Fairfax
Market Rent
$3K/mo
Est. Annual Income
$30K
Est. ROI
13.3%
Monthly Cash
$2K
Value Growth (12m)
-0.5%
*Estimates based on average ADU size (800 sqft) and construction costs ($200K). Actual results may vary. Use calculator for personalized analysis.