Affordable ADU Builders in San Jose
Find affordable granny flat contractors in San Jose. Average rent: $3,419/month. Compare prices, get quotes, and start your ADU project.
38
Contractors
$3K
Average Rent /mo
$1.4M
Avg Home Value
Featured Builders
ADU builders serving San Jose
Room Addition & Adu Contractor San Jose
ADU Services San Jose
San Jose ADU Contractors
Top Investment Neighborhoods
Highest rental yields in San Jose by ZIP Code
ZIP 95120
Highest Return
ZIP 95135
ZIP 95148
ZIP 95124
ZIP 95130
ZIP 95132
ZIP 95118
ZIP 95133
Top ZIP Codes by Rent in San Jose
Neighborhoods with the highest average rental rates
95124
95148
95130
95132
95118
95133
95127
95131
95134
95125
San Jose 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
San Jose shows strong rent growth of 6.9% over the past 12 months. Home values have changed by 2.8%, making ADU investment a strategic choice for homeowners.
Projected Property Value
Current market analysis for San Jose indicates a -1.3% increase in property values over the next 12 months.
Similar Cities to San Jose
Cities with similar market characteristics for comparison
California State ADU Standards
These are the guaranteed rights for homeowners in San Jose 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 San Jose planning department.
Building ADUs in San Jose
Looking for affordable ADU construction in San Jose? Our directory features 38 builders offering competitive pricing and quality workmanship.
With rental rates at $3,419/month and growth of +6.9%% over the past year, ADU investment in San Jose provides excellent returns for homeowners.
Frequently Asked Questions about ADUs in San Jose
Common questions from local homeowners
ADU construction costs in San Jose 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 San Jose
Market Rent
$3K/mo
Est. Annual Income
$39K
Est. ROI
17.5%
Monthly Cash
$3K
Value Growth (12m)
-2.8%
*Estimates based on average ADU size (800 sqft) and construction costs ($200K). Actual results may vary. Use calculator for personalized analysis.