Deck Permit in Alameda County, California
It depends
Sometimes, depending on the project
Before building a raised deck in unincorporated Alameda County that stands more than 30 inches above adjacent grade, sits over a basement or story below, or forms part of an accessible route
By Mario Bailey, verified against official sources
Quick answer
Alameda County exempts raised decks, platforms, ramps, sidewalks, and driveways accessory to a house from a building permit only when they are not more than 30 inches above adjacent grade, are not over any basement or story below, and are not part of an accessible route. Anything above that needs a building permit. The county's Small Projects handout sets the plan package for a deck: a plot plan at 1 inch = 20 feet or 1/16 inch = 1 foot showing property lines, existing structures and their distance from the property lines, easements and utilities, and the deck's size and location; plus a floor framing plan and a foundation plan at not less than 1/4 inch = 1 foot. This applies to unincorporated Alameda County only.
Typical threshold: Height of a raised deck above adjacent grade at which the building permit exemption stops, and only where the deck is not over a basement or story below and is not part of an accessible route.
Who is pulling this permit?
Apply yourself
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
- Is your contractor license active in this locality, and under which business name?
When a permit is usually needed
Before building a raised deck in unincorporated Alameda County that stands more than 30 inches above adjacent grade, sits over a basement or story below, or forms part of an accessible route
What a deck permit costs in Alameda County
How Alameda County compares in California
| Jurisdiction | Permit needed? | Threshold |
|---|---|---|
| Alameda Countythis page | It depends | Height of a raised deck above adjacent grade at which the building permit exemption stops, and only where the deck is not over a basement or story below and is not part of an accessible route |
| Contra Costa County | It depends | area of a deck that is also no more than 30 inches above grade at any point, is not attached to a dwelling, and does not serve a code-required exit door |
| Fresno County | Permit required | Not specified |
| Los Angeles | Permit required | Not specified |
| Los Angeles County | It depends | height of the deck surface above grade; the exemption also requires the deck not to be over any basement or story below and not to be part of an accessible route |
| Orange County | Permit required | Not specified |
| San Diego County | It depends | A deck needs a building permit when it is more than 30 inches above adjacent grade, or sits over a basement or story below, or forms part of an accessible route. |
Closest deck permit thresholds outside California
Jurisdictions we cover whose limit sits nearest Alameda County's 30 inches above adjacent grade.
- Eugene, Oregon, height of the deck or porch floor above adjacent grade, measured at any point within 3 feet horizontally of the floor, with a covered porch also needing to stay at least 3 feet from property lines
- Portland, Oregon, height of the deck walking surface above adjacent grade, taken 36 inches out from the edge of the deck
- St. Louis, Missouri, inches above adjacent grade for an uncovered wood deck or patio resting directly on the ground or a rock base with no permanent foundation
How to apply in Alameda County
A residential deck permit application is a set of construction documents that show what will be built and prove it meets the IRC deck provisions. In practice that means a scaled site plan locating the deck and its setbacks, plus deck plans and structural details covering the footings, posts, beams, joists, ledger, guards, and stairs.
What most deck permit applications include:
- A permit application identifying the work, the deck's size (square footage), and whether electrical work such as lights or receptacles is included, submitted for plan review before construction begins (IRC R106).
- A scaled site plan (for example 1/4 inch to 1 foot) showing the new deck's location relative to the house, its overall length and width, and dimensioned distances from the deck to all property lines and other structures so required setbacks can be verified (IRC R106.1.1).
- A deck plan drawn to scale showing overall dimensions and the framing layout: joist size, spacing, span, and species; beam size and span; post size and height; and footing or pier size and depth (IRC R507.4 posts, R507.5 beams, R507.6 joists, R507.3 footings).
- A section or side elevation with connection details showing the ledger attachment to the house band joist with flashing, the fastener or bolt schedule, joist hangers, post-to-beam and post-to-footing connections, and the required lateral load connection (IRC R507.9 ledger connection, R507.9.2 lateral connection, R507.2.4 flashing).
- Footing sizing derived from tributary area, the soil bearing value, and design loads per IRC Table R507.3.1, with footings shown bearing on undisturbed soil at the frost depth required by the jurisdiction (IRC R507.3).
- Details for the guards required where the walking surface is more than 30 inches above grade, and for the stairs and handrails, showing guard height and opening limits, stair riser and tread dimensions, and handrail location (IRC R312 guards, R311.7 stairs and handrails).
- For designs that fall outside the prescriptive R507 tables (for example multi-story or stacked decks, or a ledger attached to a cantilever), engineered and stamped structural plans are submitted in place of the prescriptive details (IRC R507.1 and R301).
General submittal guidance from IRC R106.1.1 (construction documents) and IRC R507 (exterior decks), 2021 IRC. Source. Alameda County Public Works Agency, Building Inspection Department sets the exact checklist for Alameda County.
Where to apply in Alameda County:
Alameda County Public Works Agency, Building Inspection Department
- 399 Elmhurst Street, Room 141, Hayward, CA 94544-1395
- Phone: 510-670-5440
- Email: permitbid@acpwa.org
Inspections and closing out your permit
Deck work is inspected in sequence as it is built: the footings before concrete is placed, the framing before the decking boards go down, and a final inspection once the deck is complete. Each stage checks the items that would be hidden or unsafe if missed.
- Footing or pier inspection: after the holes are dug and any forms or reinforcing are set but before concrete is placed, the inspector checks footing depth and diameter, a flat undisturbed bearing surface, and that the holes are free of water (IRC R109.1.1 foundation inspection; R507.3 footings).
- Framing inspection: after the deck is framed but before the decking conceals it, the inspector verifies the ledger attachment and its flashing, the fastener and bolt schedule, joist hangers and metal connectors, post-to-beam and post-to-footing connections, and the lateral load connection; call it before decking is installed (IRC R109.1.4 frame inspection; R507.9 ledger and flashing).
- Final inspection: after the deck is complete and before it is used, the inspector confirms guard height and opening limits (a 4 inch sphere must not pass, 4 3/8 inch at stairs), stair riser and tread dimensions, handrail height and graspability where there are 4 or more risers, stair landings, and required stair lighting (IRC R109.1.6 final inspection; R312 guards, R311.7 stairs and handrails).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Alameda County permit portal or by phone at 510-670-5440.
Inspection sequence from IRC R109 (inspections: R109.1.1 footing before concrete, R109.1.4 frame, R109.1.6 final), 2021 IRC. Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Deck Permit checklist for Alameda County
- Confirm the requirement. Sometimes, depending on the project. Typical threshold: Height of a raised deck above adjacent grade at which the building permit exemption stops, and only where the deck is not over a basement or story below and is not part of an accessible route. Usually needed: Before building a raised deck in unincorporated Alameda County that stands more than 30 inches above adjacent grade, sits over a basement or story below, or forms part of an accessible route.
- Budget the fee. No deck line item appears in the Building Inspection Department Service Fee Schedule (Schedule A, effective July 1, 2024). A deck permit is priced from construction valuation using the Schedule A building permit fee table (for example, '$381.46 for the first $10,000 plus $8.88 for each additional $1,000.00 or fraction thereof, to and including $50,000'), plus building plan review at 80% of the building permit fee with a $140.00 minimum, plus a $20.00 single-permit processing fee. Official fee schedule.
- Apply. A residential deck permit application is a set of construction documents that show what will be built and prove it meets the IRC deck provisions. In practice that means a scaled site plan locating the deck and its setbacks, plus deck plans and structural details covering the footings, posts, beams, joists, ledger, guards, and stairs. Start at the Alameda County permit portal.
- Keep the office details handy. Alameda County Public Works Agency, Building Inspection Department. Phone: 510-670-5440. Address: 399 Elmhurst Street, Room 141, Hayward, CA 94544-1395.
- Plan for inspections. Deck work is inspected in sequence as it is built: the footings before concrete is placed, the framing before the decking boards go down, and a final inspection once the deck is complete. Each stage checks the items that would be hidden or unsafe if missed.
Compiled from the official sources on this page. Last checked .
Frequently asked questions
- Do you need a deck permit in Alameda County?
- Alameda County exempts raised decks, platforms, ramps, sidewalks, and driveways accessory to a house from a building permit only when they are not more than 30 inches above adjacent grade, are not over any basement or story below, and are not part of an accessible route. Anything above that needs a building permit. The county's Small Projects handout sets the plan package for a deck: a plot plan at 1 inch = 20 feet or 1/16 inch = 1 foot showing property lines, existing structures and their distance from the property lines, easements and utilities, and the deck's size and location; plus a floor framing plan and a foundation plan at not less than 1/4 inch = 1 foot. This applies to unincorporated Alameda County only. Height of a raised deck above adjacent grade at which the building permit exemption stops, and only where the deck is not over a basement or story below and is not part of an accessible route. Always confirm with the office before starting.
- How much does a deck permit cost in Alameda County?
- No deck line item appears in the Building Inspection Department Service Fee Schedule (Schedule A, effective July 1, 2024). A deck permit is priced from construction valuation using the Schedule A building permit fee table (for example, '$381.46 for the first $10,000 plus $8.88 for each additional $1,000.00 or fraction thereof, to and including $50,000'), plus building plan review at 80% of the building permit fee with a $140.00 minimum, plus a $20.00 single-permit processing fee. See the official fee schedule for current amounts.
- Where do you apply for a deck permit in Alameda County?
- You can apply through the Alameda County permit portal or contact the Alameda County Public Works Agency, Building Inspection Department directly. The links are listed on this page.
- Can a homeowner pull a deck permit themselves in Alameda County?
- Under California law (Business & Professions Code 7044(a)-(b); Business & Professions Code 7031.5): California exempts an owner-builder from contractor licensing when the owner personally performs the work, or uses only wage employees, on their own property and does not intend the improvements for sale. A homeowner may also directly hire licensed trade contractors for up to four single-family residences a year, or improve their own principal residence without a general contractor's license, as long as they have actually lived there for the 12 months before the work is finished. Selling a self-built structure within one year of completion creates a rebuttable presumption that it was built for sale, which defeats the exemption, and selling five or more structures within a year makes that presumption conclusive. Separately, every city or county that requires a building permit must also require the applicant to file a signed statement giving their contractor license number or the basis of their claimed exemption; a false or missing statement carries a $500 civil penalty. Confirm how Alameda County applies this before you apply.
From the Library
What else needs a permit in Alameda County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Electrical Permit | Permit required | Not specified | Building Inspection Department Service Fee Schedule (Schedule A, effective July 1... |
| Fence Permit | It depends | Permit exemption height limit: 7 feet for fences of light materials, 5 feet 9 inches for fences of concrete, masonry, or similar heavy materials | No fence line item appears in the Building Inspection Department Service Fee Schedule... |
| HVAC Permit | Permit required | Not specified | Building Inspection Department Service Fee Schedule (Schedule A, effective July 1... |
| Patio Permit | It depends | Total area of each sunshade structure, including any roofed area, at which the building permit exemption stops; the exemption also requires an average height of not more than 10 feet | No patio cover line item appears in the Building Inspection Department Service Fee... |
| Plumbing Permit | Permit required | Not specified | Building Inspection Department Service Fee Schedule (Schedule A, effective July 1... |
| Pool Permit | It depends | Depth of a prefabricated pool at which the building permit exemption stops; the exemption also requires the pool to hold no more than 5,000 gallons and to be installed entirely above ground | No swimming pool line item appears in the Building Inspection Department Service Fee... |
| Roof Replacement Permit | It depends | Aggregate roof area repaired on a previously permitted roof, at which the building permit exemption stops | No re-roof line item appears in the Building Inspection Department Service Fee Schedule... |
| Shed Permit | It depends | Floor area of a one-story detached tool or storage shed accessory to a house, at which the building permit exemption stops | No shed line item appears in the Building Inspection Department Service Fee Schedule... |
| Solar Permit | Permit required | Not specified | Building Inspection Department Service Fee Schedule (Schedule A, effective July 1... |
Deck Permit in other California localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Alameda County documents; the office above sets the local rules.
Verified by a person against the sources above on , not confirmed with Alameda County Public Works Agency, Building Inspection Department. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare Deck Permit requirements across California localities
Permit office
Alameda County Public Works Agency, Building Inspection Department
510-670-5440Permit portal