Pre-Submission Review · Free
San Jose, California
Garage conversions are one of the fastest, most affordable paths to additional living space in California. Under state law, cities cannot require replacement parking when you convert a garage to an ADU — that's one of the biggest advantages over new construction. But you still need to meet habitable space standards for ceiling height, natural light, ventilation, and fire separation.
Garage conversions are one of the fastest paths to additional living space in San Jose. Under California law, converting a garage to an ADU has significant advantages: no additional setback requirements (the structure already exists), no replacement parking requirement, and often lower construction costs than new construction.
What to know about garage conversions in San Jose:
Use the form above to check your garage conversion against San Jose's codes. We verify setbacks, height, coverage, and parking to flag issues before you submit.
Fill in the form above with your lot size, setbacks, building height, and other dimensions — the same numbers on your architectural plans.
Your project is compared against San Jose's specific zoning requirements — setbacks, height limits, lot coverage, parking ratios, and FAR limits for your zone.
Critical violations, warnings, and advisory items — ranked by what a San Jose plan checker will flag first. Fix issues before you submit and save weeks of correction cycles.
| Zone | Front | Side | Rear | Height | Coverage |
|---|---|---|---|---|---|
| R-1-8 — Single-Family Residential | 25' | 5' | 20' | 35' | 45% |
| R-2 — Two-Family Residential | 25' | 5' | 20' | 35' | 50% |
San Jose requires a 25' front setback, 5' side setback, and 20' rear setback in the most common residential zone. Specific requirements vary by zone — enter your zone code above for exact numbers.
Initial plan review in San Jose typically takes 4-8 weeks. If corrections are required, each resubmission adds another 2-4 weeks. Running a pre-check before submitting can eliminate the most common correction items and save one or more review cycles.
The most common residential zone in San Jose allows a maximum height of 35 feet. Height measurement methods vary — some cities measure to the highest ridge, others to the midpoint of the roof. Check the specific zone requirements for your property.
Yes. Create a free account to run unlimited plan checks against San Jose's building codes. The tool checks setbacks, height limits, lot coverage, parking requirements, and flags common issues that San Jose plan reviewers look for.
The most frequently flagged items in San Jose include: Heritage tree removal not addressed — permit required; Front setback is 25 feet (not 15 or 20 like many CA cities); Lot coverage calculation errors — San Jose uses 45% for R-1-8. Our tool checks for all of these automatically.