A Junior ADU (JADU) in San Bernardino is an in-home accessory unit up to 500 sf, typically converted from existing bedrooms or attached garage space. JADUs are the cheapest permitted ADU type in California.
As the county seat of San Bernardino County, the city offers some of the most affordable ADU opportunities in Southern California. Established neighborhoods and low land costs make it an accessible entry point for homeowners adding rental income.
Why homeowners in San Bernardino choose this ADU path
- Lowest total cost in the ADU category
- Often qualifies for streamlined permitting
- No separate utility connections required in most cases
- Ideal for caregivers, aging family members, or modest rental income
- Permitted in single-family zones across California
What makes San Bernardino a strong JADU market
- County seat of San Bernardino County with a large housing base
- Among the most affordable ADU markets in Southern California
- Established neighborhoods with older garages ideal for conversions
- Deep, buildable lots in many older districts
- Steady rental demand near CSUSB and regional employers
Junior ADU (JADU) across San Bernardino neighborhoods
Vision ADU builds throughout San Bernardino, including Downtown San Bernardino, Del Rosa, Arrowhead, Verdemont, University District, Perris Hill. Wherever your property sits, we handle design, permits, construction, and final inspection in-house.
San Bernardino permitting snapshot
Median San Bernardino home value: $430,000. ADU rental range: $1,400-$2,200 per month. Typical permit timeline: 4-6 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.
Related San Bernardino resources
San Bernardino Junior ADU (JADU) — FAQ
How much does a JADU cost in San Bernardino in 2026?
Junior ADU (JADU) pricing in San Bernardino typically ranges based on size, finish level, and lot conditions. Vision ADU provides written estimates within 72 hours of a free site evaluation.
How long does a JADU take in San Bernardino?
In San Bernardino, 4-6 weeks is typical for permits, with construction taking an additional 3–6 months depending on scope.
Do I need a special permit for an ADU in San Bernardino?
Yes — every ADU in San Bernardino requires a building permit. Vision ADU handles the entire permitting process in-house, including plan check coordination with San Bernardino planning staff.
What rental income can I expect from an ADU in San Bernardino?
San Bernardino ADU rentals typically range $1,400-$2,200 per month depending on size and finish.
Is Vision ADU licensed to build in San Bernardino?
Yes — Vision ADU is a CSLB-licensed B-General contractor (#1115842) actively building across Inland Empire including San Bernardino.
Why is San Bernardino a good ADU market?
San Bernardino offers some of the lowest land costs in Southern California alongside steady rental demand, which makes it an accessible entry point for homeowners looking to add a unit and rental income.
What ADU type works best in San Bernardino?
Many older San Bernardino lots already have detached garages, which makes garage conversions and JADUs practical, while deeper parcels can support a full detached unit. Vision ADU recommends the best fit after reviewing your property.
How long does ADU permitting take in San Bernardino?
San Bernardino reviews ADUs ministerially and must act on a complete application within 60 days under state law. Vision ADU prepares the plans and manages all city corrections.
Do HOAs in San Bernardino allow ADUs?
Yes. Under AB 670, an HOA cannot prohibit an ADU on a single-family lot, though it may set reasonable design standards. Vision ADU helps work within those guidelines.
