A detached new construction ADU in San Marino offers flexible layouts and potential rental income. Vision ADU has completed over 75 ADUs of all types across Southern California.
San Marino is one of the most prestigious cities in the San Gabriel Valley, known for the Huntington Library and top-rated schools. Ultra-high property values create exceptional ADU investment potential.
Why homeowners in San Marino choose this ADU path
- Full customization of layout, finishes, and orientation
- Highest resale and appraisal value per square foot
- Up to 1,200 sf allowed under California state law
- Privacy from main house — ideal for rentals or multigenerational living
- Pre-approved city plans available in many jurisdictions
What makes San Marino a strong detached new construction ADU market
- Among the highest property values in the SGV
- Top-rated San Marino Unified School District
- Huntington Library and Gardens nearby
- Exclusive residential character
- State ADU law ensures permitting access
New Construction ADU across San Marino neighborhoods
Vision ADU builds throughout San Marino, including San Marino North, San Marino South, Lacy Park Area. Wherever your property sits, we handle design, permits, construction, and final inspection in-house.
San Marino permitting snapshot
Median San Marino home value: $2,400,000. ADU rental range: $3,200-$5,000 per month. Typical permit timeline: 6-10 weeks. Vision ADU handles permitting end-to-end so you do not chase city staff.
Pricing transparency
We publish honest cost ranges and itemized written estimates after every free site evaluation. See our 2026 ADU cost guide for current ranges, or read our full California pricing breakdown.