ADU permit cost and fee breakdown in Tiburon, California
GetYourPermit’s researched permit-fee range for a detached accessory dwelling unit in Tiburon, with category estimates and direct reference links used in our investigation.
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ADU size
California prohibits development impact fees for ADUs of 750 sq ft or less, so the 749 / 750 / 751 steps are worth comparing.
Estimated total
GetYourPermit researched range at 750 sq ft
$8,095 – $19,195
This estimate combines our fee-schedule research and project-planning experience. Actual charges vary by parcel, plans, valuation, utilities, and outside agencies.
Typical planning amount
$12,995
Modeled at the 600 sq ft reference.
Where the money goes
These are fee components within the permit process, not separate approvals.
- Separate planning / zoning fee$595
Shown only where the City bills Planning or zoning review as a separate fee.
- Building plan check$1,600 – $3,800
The Building Division’s review of the drawings; part of the Building Permit process.
- Building permit issuance$2,000 – $4,800
The permit issuance charge; where plan check is bundled, the combined amount is carried here.
- Separate trade permits$750 – $1,850
Shown separately only where electrical, plumbing, or mechanical permits are billed outside a combination permit.
- School district fees$1,200 – $2,500
Possible school-district developer fees based on current thresholds and scope.
- Utility fees$1,100 – $3,600
Possible water, sewer, electrical, meter, or capacity-related charges.
- Processing, inspection & records$450 – $1,150
Fixed processing, inspection, records, and administrative charges.
- Surcharges, taxes & state fees$400 – $900
Percentage surcharges, construction taxes, and State-mandated charges.
The darker segment is the low end of the range; the full bar is the high end.
Published fee references
Building permit issuance
The permit issuance charge; where plan check is bundled, the combined amount is carried here.
| Fee | Amount | Basis | Source |
|---|---|---|---|
| Building Permit fee lookup | Verify on the City’s official website | Verify on the City’s official website | Apply for a Building PermitLocation: Apply for a Building Permit, Permit Fees & Re-Evaluation FeesConfirms: The current Town page establishes valuation-based calculation and application-time staff estimate, but not a capturable numerical formula. |
Surcharges, taxes & state fees
Percentage surcharges, construction taxes, and State-mandated charges.
| Fee | Amount | Basis | Source |
|---|---|---|---|
| Secondary Dwelling Unit Permit | $595 | Flat fee | Forms & FeesLocation: Forms & Fees, Other Planning Fees, Secondary Dwelling Unit PermitConfirms: The live Town fee page presents this named permit as a $595 flat fee; it does not establish a complete ADU total. |
These are estimates, not official fees
Use these figures for early budgeting only. They are not a quote, not a government fee determination, and not legal advice. Actual fees depend on your parcel, your plans, your construction valuation, your utility provider, and the fee schedule in force on the day your permit is issued. Confirm every number with Tiburon before you commit money.
City reference pages for verification
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