ADU Permit Fees & Costs in St. Petersburg, Florida
Everything you need to apply for a adu permit in St. Petersburg, Florida — documents, fees, steps, and a downloadable submission packet.
Key Facts
- Permit required
- Yes
- Submission method
- Online
- Typical fee range
- $3,600 – $11,880
- Review time
- Varies by jurisdiction
- Inspections
- 6 inspections required
Limited Data Available
Some information on this page has not been fully verified. We're working to improve data quality. Always verify with St. Petersburg directly.
Estimated Total Fees
$3,600 – $11,880
Range based on typical residential solar PV system. Actual fees depend on project valuation and system size.
| Fee Component | Range | Confidence |
|---|---|---|
| ADU Permit Fee[1][2] Building permit fees calculated on construction valuation per St. Petersburg fee schedule. Plan review and inspection fees included. Hurricane wind mitigation fees may apply. | $2,400 – $7,200 | ✓ |
| Plan Review Fee[3][4] Plan review fee is typically 50-65% of the permit fee. | $1,200 – $4,680 | ✓ |
| Estimated Total | $3,600 – $11,880 |
Fees shown as ranges. Always verify the exact amount with St. Petersburg before submission. Additional fees may apply for expedited review or resubmittals.
Generate your permit packet
Get a personalized ADU permit packet for St. Petersburg, Florida — tailored to your project details.
- Required forms: Building Permit Application, and more
- Pre-filled templates: Permit Cover Sheet
- Fee breakdown: $1,200–$7,200 estimated total
- Step-by-step St. Petersburg Planning and Development Services portal submission guide
- Inspection prep checklist (6 items)
- Personalized for your specific project details
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Required Documents
St. Petersburg requires the following documents for this permit application.
Building Permit Application
Completed City of St. Petersburg building permit application with ADU project description, property owner information, and construction valuation
Architectural Drawings
Complete architectural plans signed by a licensed Florida architect, including floor plans, elevations, building sections, and construction details
Site Plan
Detailed site plan showing property boundaries, lot dimensions, building footprint, setbacks, parking layout, driveways, and utilities
Zoning Verification Letter
Zoning verification letter from City of St. Petersburg Planning confirming ADU is permitted in property zoning district
Structural Engineering Plans
Structural engineering plans and calculations signed by a licensed Florida professional engineer for foundation and structural systems
Mechanical and Utility Plans
Plans showing water supply, sewer, electrical, and natural gas connections with separate metering specifications for ADU utilities
Permit Process
Follow these steps to submit your permit application through St. Petersburg Planning and Development Services.
- 1
Zoning Eligibility Verification
Obtain zoning verification letter from City of St. Petersburg Planning confirming property zoning permits ADU development
You'll need: Zoning Verification Letter
- 2
Submit Building Permit Application
Submit complete building permit application with all architectural, structural, and utility plans to St. Petersburg Planning and Development
You'll need: Building Permit Application, Architectural Drawings, Site Plan, Structural Engineering Plans, Mechanical and Utility Plans
- 3
Plan Review and Approval
St. Petersburg Planning and Building Departments conduct comprehensive review for zoning and building code compliance
- 4
Address Plan Review Comments
Revise and resubmit plans to address any code compliance issues or comments from interdepartmental review
- 5
Permit Issuance and Fee Payment
Pay all applicable permit and inspection fees and receive authorization to begin construction
- 6
Construction Inspections
Schedule and pass required inspections throughout construction: foundation, framing, electrical, plumbing, mechanical, and final per Florida Building Code
- 7
Certificate of Occupancy
Receive Certificate of Occupancy from Building Official upon successful final inspection and compliance confirmation
Authority Sources
Data on this page is sourced from official records published by the permitting authority. Always verify requirements directly before submitting.
St. Petersburg Planning and Development Services
Last verified: February 15, 2026
2 sources referenced
Verified February 15, 2026
Verified February 15, 2026
Verified February 15, 2026
Verified February 15, 2026
Frequently Asked Questions
- Do I need a adu permit in St. Petersburg?
- Yes. St. Petersburg requires a adu permit for this type of project. Submitting without a permit may result in fines, required removal, or complications when selling your property.
- How long does adu permit approval take in St. Petersburg?
- Processing times in St. Petersburg vary depending on project complexity and current review volume. The process involves 7 steps. Contact St. Petersburg Development Services for current timelines.
- What documents are required for a adu permit in St. Petersburg?
- St. Petersburg requires 6 documents including Building Permit Application, Architectural Drawings, Site Plan, Zoning Verification Letter, and others. See the full list above for details.
- What happens if I build without a adu permit in St. Petersburg?
- Building without a permit in St. Petersburg can result in stop-work orders, fines, required removal of work, difficulty selling your property, and insurance complications. It is strongly recommended to obtain proper permits before starting work.
- Can PermitMagic help prepare my adu permit submission in St. Petersburg?
- Yes. PermitMagic generates a submission-ready packet tailored to St. Petersburg's requirements, including a document checklist, workflow steps, and authority references. Start a permit plan to get your personalized packet.
- How much does a adu permit cost in St. Petersburg?
- ADU permit fees in St. Petersburg typically range from $3,600 to $11,880, depending on project scope. Fees may include building permit, plan review, and technology surcharges. Verify current fees with St. Petersburg.
Related Permits
Other permits in St. Petersburg
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