Service Area — Bay Area
ADU & Modular Home Builder
in San Jose,California
San Jose sits at the heart of Silicon Valley, where housing demand from Apple, Google, Nvidia, and Intel employees creates one of the strongest ADU rental markets in the country. Epic Modulars delivers factory-built ADUs to San Jose properties starting at $79K, with full permit assistance and timelines that beat site-built construction by months.
Why Build in San Jose?
Rental income of $2,200–$3,400/month
San Jose ADU rents rank among the highest in the nation, driven by Silicon Valley tech worker demand.
San Jose offers pre-approved ADU standard plans that fast-tr
San Jose offers pre-approved ADU standard plans that fast-track permits and eliminate costly architectural review rounds.
Factory-built ADUs arrive 40–60% faster than site-built, min
Factory-built ADUs arrive 40–60% faster than site-built, minimizing disruption to the primary residence during construction.
ADU Permits in San Jose
San Jose Building Division administers ADU permits and offers a pre-approved Standard Plans Program that lets homeowners select from city-vetted designs, bypassing plan check delays. Most pre-approved plan applications receive over-the-counter approval. For custom designs, plan check typically takes 4–8 weeks. San Jose follows California's streamlined ADU approval laws, meaning nearly any single-family or multi-family lot is eligible.
- Permit Authority:San Jose Building Division
- Typical Timeline:2–4 weeks for pre-approved plans
- ADU Size Range:150–1200 sq ft
- Max Height:18 ft (detached)
Est. Monthly Rental Income
$2,200–$3,400/month
Estimated market rental range for ADUs in San Jose, Santa Clara County. Actual rents vary by size, location, and finishes.
Epic Modulars provides full permit assistance in San Jose. We handle submittal, tracking, and coordination with San Jose Building Division.
ADUs & Homes for San Jose Homeowners
All models are factory-built in California and pre-engineered for permitting in Santa Clara County.
1-Bed / 1-Bath ADU
The most popular ADU size in California. Full bedroom, living area, kitchen, and bath. Strong rental demand in every market.
2-Bed / 1-Bath ADU
Maximum income potential for families and couple renters. Full-size living, two private bedrooms, and a large bath.
Modular Home
Full-size modular homes from 1,336 to 2,500 sq ft. Factory-built with the same speed and cost predictability as our ADUs.
How It Works in San Jose
Site Assessment
We visit your property, verify setbacks, utilities, and lot coverage, and confirm your ADU or home options. Free, no obligation.
Design & Permits
We select the right model, prepare permit-ready drawings, and submit to your local building department. We track it to approval.
Factory Build
Your ADU or home is built in a controlled California factory — consistent quality, no weather delays, parallel site prep.
Installation
We deliver, set, and finish your unit on-site. Final inspections, utility connections, and keys in hand.
ADU Questions for San Jose Homeowners
How long does ADU permitting take in San Jose?
Using San Jose's pre-approved Standard Plans Program, homeowners can receive over-the-counter approval the same day. For custom ADU designs, plan check typically runs 4–8 weeks. Epic Modulars handles all permit coordination for you.
What is the maximum ADU size allowed in San Jose?
California law allows detached ADUs up to 1,200 sq ft in San Jose. Attached ADUs are limited to 50% of the primary dwelling sq ft, not to exceed 1,200 sq ft. Junior ADUs (JADUs) must be 500 sq ft or under and located within the primary structure.
Can I rent my ADU on Airbnb in San Jose?
San Jose allows short-term rentals with a permit, but the host must occupy the primary residence during guest stays. Many Epic Modulars clients in San Jose opt for long-term furnished rentals to tech workers, which deliver more predictable income without the management overhead.
What are typical ADU construction costs in San Jose vs. site-built?
Epic Modulars factory-built ADUs start at $79K for a studio model. Site-built ADUs in San Jose typically cost $200–$400 per sq ft, meaning a comparable 400 sq ft unit runs $80K–$160K before permits, site work, and utility hookups. Our factory model delivers comparable quality at substantially lower cost with faster delivery.
We Also Serve Nearby Communities
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Get your free quote today — no obligation, no pressure. Just a real conversation about what's possible on your property.
Get My Free QuoteServing San Jose and all of Santa Clara County · Factory-built in California · ADUs from $79K · Homes from $245K