What's Required in San Jose
- Exempt only if 200 sq ft or less, 30 in or lower at every point, detached from the dwelling and not serving the required exit door (SJMC 24.02.120.A.8)
- Attached decks, larger or higher decks, and structural repairs need a building permit (SJMC 24.02.100; 24.01.263)
- Plans drawn to scale showing location and extent of work; the building official may require engineered drawings (SJMC 24.02.220, 24.02.230)
- Work is reviewed under the 2025 California Residential Code, in effect since January 1, 2026
- Foundation, frame and final inspections are required; rough electrical is inspected before concealment
- Electrical on the deck needs a separate electrical permit at $315 per hour of inspection time
- Keep 6 ft between the deck structure and other buildings on the lot; rear-setback projections follow SJMC 20.30.420
- Permit expires after 12 months without a start or 180 days without progress; extensions $105
Do You Need a Permit for a Deck in San Jose?
Usually yes. San Jose's exemption is narrower than the 30-inch rule most people quote: Municipal Code 24.02.120 exempts decks, in Group R-3 occupancy, not exceeding 200 square feet in area, that are not more than 30 inches above grade at any point, are not attached to a dwelling and do not serve the required exit door. All four conditions have to hold. A ground-level platform off the back door fails the exit-door test, a ledger-mounted deck fails the attachment test, and a 12 by 20 deck is already at the 200 square foot limit. Decking boards and railings are finish-level work, but the code's own definition of repair covers replacement of any part of an existing structure, so replacing joists, beams, posts or footings is permitted work.
San Jose Deck Rules by Scenario
| What you are doing | City filing | Rule |
|---|---|---|
| Freestanding platform, 200 sq ft or less, 30 in or lower, not at an exit door | No building permit | SJMC 24.02.120.A.8 |
| Deck attached to the house with a ledger, any size | Building permit | SJMC 24.02.120.A.8 (not attached to a dwelling); 24.02.100 |
| Deck over 200 sq ft or more than 30 in above grade at any point | Building permit with plans | SJMC 24.02.120.A.8; foundation, frame and final inspections |
| Replacing joists, beams, posts or footings on an existing deck | Building permit | SJMC 24.01.263 repair; 24.02.100 |
| Swapping deck boards or railing pickets like for like | No permit in practice; confirm if the guard height changes | SJMC 24.02.120.A.9 finish work; judgment |
| Deck with a light, outlet or hot tub circuit | Electrical permit | SJMC 24.02.120.B; $315 per hour of inspection time |
| Deck in the rear setback area | Allowed subject to 20.30.420 projection rules; keep 6 ft from other buildings | SJMC 20.30.420; 20.30.520 |
How Much Does a Deck Permit Cost in San Jose?
Three fee lines from the Schedule of Fees and Charges effective July 1, 2026. The Decks permit processing line is 1.0 hour, $211. The building permit is charged at $315 per hour of inspection time in tiers: Tier 1 is 40 minutes, Tier 2 is 70, Tier 3 is 130 and Tier 4 is 250, invoiced at minutes times the rate. Plan check is $325 per hour, with a 30-minute minimum over the counter and a one-hour minimum for a review intake. A small attached deck reviewed over the counter in Tier 1 is about $211 + $210 + $162.50, roughly $585. A raised deck with stairs and a guard, plan-checked in Tier 3, is about $211 + $682.50 + $325, roughly $1,220. Add an electrical permit at a $315 minimum if you wire it. The Building Official may adjust fees when the scope differs significantly from the table, and work started without a permit is charged two times the plan review and inspection cost.
What the Plan Reviewer Needs
The code requires plans drawn to scale showing the location, nature and extent of the work, and the building official may require engineered drawings when state law does not. For a deck that means a site plan with property lines and distances to the house and other buildings, a framing plan with joist and beam sizes and spans, footing details, stair and guard details, and the ledger connection if attached. San Jose adopted the 2025 California Residential Code effective January 1, 2026, so the deck is checked against that edition. Inspections follow the code sequence: foundation when footings are dug and steel is placed, frame when framing and any rough electrical are complete, and final.
Who Pulls the Permit
The owner can. California exempts an owner-builder who does the work personally or hires licensed subcontractors, and a homeowner improving a principal residence occupied for 12 months. A contractor must be state-licensed for any job of $1,000 or more. Decks are not on SJPermits.org's online permit list, so file through the Permit Center at 200 E. Santa Clara St. (plan-review projects start online and upload to SJePlans). The permit expires if work does not begin within 12 months or stops for 180 days, and an inspection showing substantial progress is required every 180 days.
How to Get a Deck Permit in San Jose
Apply the four-part test
Size, height, attachment and exit door. Fail any one and the deck needs a building permit.
Draw the plans
Site plan with property lines and building distances, framing plan with spans, footing, ledger, stair and guard details.
File through the Permit Center
Decks are not an online permit type; start the application on SJPermits.org, upload to SJePlans, or bring plans to 200 E. Santa Clara St.
Pay processing, permit and plan check
$211 processing, tiered inspection fee at $315 per hour and plan check at $325 per hour; add $315 minimum for an electrical permit.
Inspect in sequence
Foundation, frame and final, plus rough electrical if wired; cancel by 2 pm two business days ahead to avoid a charge.