ADU & Granny Flat Construction in San Jose, CA
Full design-build accessory dwelling units -- attached, detached, or garage-conversion ADUs, permitted start to finish.
About Our ADU & Granny Flat Construction Service
An Accessory Dwelling Unit is one of the highest-return projects a San Jose homeowner can build -- rental income, multigenerational housing, or a private space for family. We handle the entire process: site evaluation, architectural plans, San Jose ADU permit submission, foundation and framing, and final inspection sign-off. California's statewide ADU reforms have made this process faster than most homeowners expect, and we stay current on every San Jose-specific setback, parking, and utility requirement so your project doesn't stall in plan check.
What's Included
Our Process
Site Evaluation & Design
We assess your lot, setbacks, and utility access, then draft ADU floor plans that maximize square footage within San Jose's zoning rules.
Permitting
We submit plans to San Jose Planning and Building, respond to plan-check corrections, and secure your building permit before breaking ground.
Construction
Foundation, framing, roofing, electrical, plumbing, and interior finish work proceed on a scheduled timeline with regular progress updates.
Inspection & Handoff
We coordinate final city inspections and walk you through the completed unit before handing over keys and warranty documentation.
Why ADU & Granny Flat Construction Matters
- Adds significant rental income potential
- Increases overall property value
- Provides flexible space for family or guests
- Faster permitting under California ADU law
- Fully permitted -- no legal gray area at resale
Frequently Asked Questions
How long does ADU permitting take in San Jose?
Can I rent out my ADU?
Do I need a separate utility meter for my ADU?
ADU & Granny Flat Construction Service Areas
We provide adu & granny flat construction across San Jose and the South Bay, including:
Get a Free Quote
Free on-site estimate
Starting at
$250,000
Typical project range for a 500-1,200 sq ft detached ADU in San Jose. Garage conversions and JADUs often run lower. Free on-site estimate.
Duration
6 - 10 months (design + permit + construction)
Warranty
1-year workmanship warranty, structural items covered longer per code
Other Services
Why Choose Us
- Licensed, Bonded & Insured
- Design-Build Under One Contract
- Permit & Inspection Handled
- Free On-Site Estimates
- Satisfaction Guaranteed
- South Bay Local
Get Your Free Estimate Today
Whether you need a new ADU, a room addition, or a full second story, our team is ready to scope your project. Text us now for a free on-site estimate.
Since 2011
South Bay Local
Licensed
Bonded & Insured
10+
Cities Served
Free
Estimates Always