Deck & Patio Permits: Mountain View vs San Jose
How do deck & patio permits rules compare between Mountain View, CA and San Jose, CA?
Mountain View and San Jose have similar restriction levels.
Mountain View, CA
Santa Clara County
Decks under 200 square feet, under 30 inches above grade, not attached to a dwelling, and not serving a required exit door do not require a permit. Larger or elevated decks require building permits in Santa Clara County.
View full Mountain View rules →San Jose, CA
Santa Clara County
San Jose requires a building permit for decks over 30 inches above grade. Uncovered patios at grade level generally do not require permits. Covered patios and pergolas with roof structures require permits. Section 311 notification may apply to new decks.
View full San Jose rules →Key Facts Comparison
| Fact | Mountain View | San Jose |
|---|---|---|
| No Permit | Under 200 sq ft, under 30 in | - |
| Permit Required | Over 30 in above grade | - |
| Guardrail | 42 in at 30 in above grade | - |
| Patio at Grade | No permit needed | - |
| Permit Threshold | - | Over 30 inches above grade |
| Patios at Grade | - | No permit typically |
| Section 311 Notice | - | Neighbors notified for decks |
| Guardrails | - | 42 inches (CA code) |
Highlighted rows indicate differences between cities.
Mountain View FAQ
Do I need a permit for a deck in Santa Clara County?
Small decks under 200 square feet, under 30 inches high, not attached to the house, and not serving an exit door are exempt. Larger or elevated decks require a permit.
Do I need a permit for a patio cover?
Patio covers attached to the dwelling typically require a building permit. Freestanding structures under 120 square feet may be exempt.
San Jose FAQ
Do I need a permit for a ground-level patio in San Jose?
Uncovered concrete or paver patios at grade level generally do not require a building permit. Covered patios with roof structures do require permits.
What is Section 311 notification for decks?
New decks and deck enlargements trigger neighborhood notification. Neighbors within 300 feet are mailed a notice and have 15 days to file objections with the Board of Appeals.
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