St. Petersburg FL ADU Rules 2026
Zoning, Permits & St. Pete Rental Income
St. Pete's 2022 zoning updates broadly expanded ADU eligibility. Most single-family homeowners can build — use the City's GIS eligibility tool to confirm your parcel first. Here's the full picture: permits, the 800 sq ft / 67% rule, transit parking waivers, and booming St. Pete rental data.
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St. Petersburg is one of Florida's most ADU-forward cities. The 2022 code updates broadened eligibility across multiple neighborhood districts, and the City's GIS eligibility tool makes it easy to pre-check your parcel before hiring anyone. For most single-family homeowners in St. Pete, the question isn't whether you can build — it's understanding the 800 sq ft / 67% size rule and what permits look like.
Under Florida SB 184 (2025) and the City's post-2022 code, ADUs are permitted by right in eligible districts when standards are met. Detached, attached, interior-conversion, and above-garage ADUs are all possible depending on your district.
This guide covers everything: St. Pete's zoning districts and eligibility, the GIS tool, the dual size limit, transit parking waivers, the 9-step permit process, historic district review, the 30-day STR minimum, rental market data, and key contacts. Note: this guide is for the City of St. Petersburg only — Pinellas County and other municipalities have different rules.
City of St. Pete vs. Pinellas County — different rules
This guide covers the City of St. Petersburg only. Pinellas County, Clearwater, St. Pete Beach, Largo, Dunedin, and other municipalities in Pinellas County have their own zoning codes and ADU rules. Confirm your property is within the St. Petersburg city limits before using this guide.
In This Guide
1. St. Pete Zoning Districts & ADU Eligibility
Start with the GIS Eligibility Tool
The City of St. Petersburg provides a dedicated GIS eligibility tool for ADU parcel pre-checks. Use it to confirm your parcel's district eligibility before hiring a designer. Then contact Planning & Development Services at stpete.org/planning to verify your specific setbacks and dimensional standards.
St. Petersburg's 2022 zoning code updates expanded ADU eligibility across its neighborhood districts. Eligible district types include single-family residential, certain mixed-use contexts, and neighborhood traditional districts. Always verify your specific district's standards with the Planning Division.
The Dual Size Limit — How It Works
800 sq ft OR 67% — the more restrictive controls
St. Petersburg applies a dual size limit to ADUs:
- Absolute maximum: 800 sq ft
- Relative maximum: 67% of the primary dwelling's floor area
Whichever is smaller governs. Examples:
- 1,200 sq ft primary dwelling → 67% = 804 sq ft → capped at 800 sq ft (absolute limit)
- 1,000 sq ft primary dwelling → 67% = 670 sq ft → capped at 670 sq ft (relative limit)
- 900 sq ft primary dwelling → 67% = 603 sq ft → capped at 603 sq ft
Verify your primary dwelling's floor area with Pinellas County Property Appraiser records before finalizing your ADU design.
ADU Eligibility Standards
Transit Parking Waiver — Worth Checking
If your parcel is near a PSTA high-frequency transit route, you may not need to add a parking space for the ADU. This can make ADU projects feasible on tighter lots that couldn't otherwise accommodate the additional parking. Contact Planning & Development Services to confirm your parcel's transit proximity status.
2. The 9-Step Permit Process
St. Petersburg's permit pathway runs through Planning & Development Services. By-right ADUs in eligible districts do not require a special hearing — the process is administrative.
Use the GIS Eligibility Tool to Pre-Check Your Parcel
Use the City of St. Petersburg's GIS eligibility tool to confirm your parcel's ADU eligibility before proceeding. A positive result means your parcel is in an eligible district — you still need to verify dimensional standards (setbacks, lot coverage) with Planning & Development Services.
Confirm Historic District Overlay
Check whether your parcel carries a historic district overlay. Historic overlay parcels require Certificate of Appropriateness approval from the Historic Preservation Commission before a building permit can be issued. Ask Planning & Development Services or check the City's GIS historic overlay layer.
Confirm District Standards — Setbacks, Lot Coverage, ADU Type
Contact Planning & Development Services to confirm the dimensional standards for your district: required setbacks, maximum lot coverage, ADU types permitted (detached, attached, interior conversion, above-garage), and height limits. These vary by district and parcel context.
Check Transit Proximity for Parking Waiver
If your parcel is near a PSTA high-frequency transit line, you may qualify for a parking exemption — no additional off-street space required for the ADU. Confirm your eligibility with Planning & Development Services before your design locks in parking layout.
Design Within 800 Sq Ft / 67% Limit
Design your ADU to meet both constraints: 800 sq ft absolute cap and 67% of your primary dwelling's floor area — whichever is less. Confirm your primary home's floor area at the Pinellas County Property Appraiser before your designer starts work.
Hire a Florida-Licensed Designer and Prepare Plans
Hire a Florida-licensed architect or designer to prepare signed and sealed construction drawings compliant with St. Petersburg's zoning code (including the 2022 amendments) and the Florida Building Code. Budget $3,000–$8,000+ for design. Ensure your designer is familiar with St. Pete's current ADU standards.
Submit to Planning & Development Services
Submit your permit application with all required documents to Planning & Development Services. Required: property survey, completed application, site plan showing setbacks and parking, floor plans, building elevations, structural drawings, energy compliance calculations (RESCHECK), and contractor license and insurance.
Historic Preservation Commission Review (if applicable)
If your parcel is in a historic district, wait for Certificate of Appropriateness issuance before the building permit is processed. Design guidelines cover exterior materials, windows, doors, and massing. Engage a designer familiar with St. Petersburg historic district contexts.
Construction, Inspections, and Certificate of Occupancy
Build per approved plans. Schedule required inspections: footings/foundation, framing, rough electrical/plumbing/mechanical, insulation, and final. After passing final inspection, the City issues a Certificate of Occupancy. Do not occupy before CO. Establish a separate unit address and note the 30-day minimum rental requirement.
3. Required Documents Checklist
Standard documents required for an ADU permit in St. Petersburg — verify the current list with Planning & Development Services:
4. Permit Fees & Timeline
Estimated Fees
| Fee Type | Amount / Contact |
|---|---|
| Building Permit Fee | Based on construction valuation — contact St. Petersburg Planning & Development Services for current fee schedule |
| Plan Review Fee | Assessed alongside permit fee at application submission |
| Zoning / Planning Review | Included in the building permit process |
| Historic Preservation Review | Additional fee if parcel is in a historic district — contact Planning & Development Services |
| Pinellas County Impact Fees | Budget $2,000–$7,000+ depending on project size — contact Pinellas County for a project-specific estimate |
| Utility Connection Fees | Contact City of St. Petersburg Utilities for connection fee estimates |
| FPL Electrical Connection | Contact Florida Power & Light at (800) 226-3545 |
| Architect / Designer Fee | $3,000–$8,000+ — no free pre-approved plans program currently |
| Private Provider Fee (expedited) | Typically $1,500–$5,000 — can significantly reduce review time |
Estimated Timeline
| Phase | Duration |
|---|---|
| GIS eligibility pre-check | 1 day |
| Planning Division consultation | 1–2 weeks |
| Survey and property research | 1–2 weeks |
| Design and plan preparation | 4–10 weeks |
| Historic Preservation Commission review (if applicable) | 4–12 additional weeks |
| Permit application preparation | 1–2 weeks |
| City plan review | 4–10 weeks (verify current queue with Planning & Development Services) |
| Review comment responses | 1–4 weeks per round |
| Construction | 3–6 months depending on scope |
| Final inspection and CO | 1–2 weeks |
| Total — Standard path (no historic) | 6–10 months |
| Total — With historic district review | 9–14+ months |
5. Local Programs & Incentives
City GIS Eligibility Tool
St. Petersburg's dedicated ADU GIS eligibility tool lets you pre-check your parcel in minutes. Use it before hiring anyone — it's the fastest way to confirm your parcel is in an eligible district. Access it through stpete.org/planning.
Transit Parking Waiver
Parcels near PSTA high-frequency transit lines may qualify for an ADU parking exemption. This is a meaningful incentive — it can make projects feasible on smaller lots that cannot accommodate additional parking. Ask Planning & Development Services to confirm your parcel's transit proximity status.
Florida Private Provider Program
Hire a state-approved Private Provider to conduct plan review and inspections independently of the city's queue. This can significantly reduce your review timeline. Find registered providers at floridabuilding.org.
Pinellas County SHIP Program
The State Housing Initiatives Partnership (SHIP) program may have funds for ADU construction or rehabilitation for income-qualified households. Contact Pinellas County Housing Finance Authority or the City for current availability.
Federal Solar Tax Credit
30% federal tax credit (through 2032) for solar panels and battery storage installed on the ADU. Florida has 0% state sales tax on solar equipment and a property tax exemption for residential solar installations.
Historic Tax Credits (if applicable)
If your property is in a St. Petersburg historic district, state or federal rehabilitation tax credits may apply to qualifying improvements. Consult a historic preservation specialist or tax professional.
6. Renting Your ADU — St. Pete Market
St. Petersburg is one of Florida's fastest-growing rental markets. The city's arts district, waterfront revitalization, and expanding tech sector attract a young professional demographic that drives strong year-round rental demand. ADU rental income here is compelling — and the 30-day minimum rental rule means the focus is long-term tenants, which provides stable, predictable income.
Long-Term Rental Market
| Studio ADU Estimate | $1,100–$1,400/month (2025–2026 St. Pete market) |
| 1-Bedroom ADU Estimate | $1,400–$1,900/month |
| Key Demand Drivers | St. Pete arts district, Pier District waterfront, growing tech/creative sector, proximity to Tampa Bay employers, University of South Florida St. Pete campus |
| Vacancy Risk | Low — St. Pete is in a prolonged period of population and employment growth; limited rental supply in established neighborhoods |
| Seasonal Pattern | More stable year-round than beach/tourist markets; professional and creative class tenants dominate |
| Premium Zones | Grand Central District, Kenwood Historic District, Old NE/Snell Isle, Campbell Park — established neighborhoods with strong ADU rental demand |
Short-Term Rentals (Airbnb / VRBO)
🟡 STR Status — 30-Day Minimum Required
St. Petersburg requires a 30-day minimum rental period in residential zones. This effectively prohibits typical Airbnb and VRBO short-term stays (which are usually days to a couple of weeks). Do not build your ADU financial model around STR income in St. Petersburg. Model returns on long-term rental income of $1,400–$1,900/month. Always verify current rules with the City before finalizing plans.
| St. Petersburg STR Rule | Minimum 30-day rental period in residential zones |
| Short-Term Rental Risk | Violating the 30-day minimum risks code enforcement and fines |
| State DBPR License | Long-term rentals (30+ days) typically require a DBPR Dwelling license — verify requirements at myfloridalicense.com |
| Pinellas County TDT | Applies to rentals under 182 days — less applicable if you follow the 30-day minimum, but confirm with the County Tax Collector |
| Build Financials on Long-Term Rent | Model your ADU return on $1,400–$1,900/month long-term rent for a 1-bedroom unit in the St. Pete market |
Long-Term Rental Logistics
7. Common Pitfalls & How to Avoid Them
Skipping the GIS eligibility tool pre-check
The GIS tool is the fastest way to confirm your parcel is in an eligible district — it takes 2 minutes. Don't hire a designer before running this check.
Misunderstanding the 800 sq ft / 67% dual size limit
Designers who don't understand the 67% relative cap sometimes design to 800 sq ft for a smaller primary home, only to fail at permit review. Calculate 67% of your primary dwelling floor area and compare it to 800 sq ft — use whichever is smaller.
Not checking the historic district overlay
St. Pete has numerous historic districts (Kenwood, Granada Terrace, Old NE, etc.) that add significant review steps. Check this before committing to a project timeline.
Not exploring the transit parking waiver
If your parcel is near a PSTA high-frequency route, you may not need to add a parking space. This can make projects feasible on lots that would otherwise fall short. Ask Planning & Development Services before your designer locks in the site plan.
Confusing St. Pete with Pinellas County or other cities
Clearwater, St. Pete Beach, Largo, Dunedin, and unincorporated Pinellas County all have different rules. This guide covers the City of St. Petersburg only. Confirm your property's jurisdiction before proceeding.
Building a business model around STR income
St. Pete's 30-day minimum rental rule prohibits typical Airbnb stays. Model ADU returns on long-term rental income ($1,400–$1,900/month) — don't rely on short-term rental income that isn't permitted.
Ignoring HOA and deed restrictions
City permits don't override HOA covenants. Review your CC&Rs before hiring a designer.
Underestimating Pinellas County impact fees
Impact fees are assessed on new residential units by the county — separate from city permit fees. Get an estimate from Pinellas County before finalizing your budget.
8. Key Contacts & Resources
Planning & Development Services
stpete.org/planningSt. Pete GIS Portal
stpete.org/gisSt. Petersburg Zoning Code (Municode)
library.municode.com/fl/st._petersburgHistoric Preservation Commission
Contact Planning & Development Services for meeting schedule
St. Petersburg Utilities
stpete.org/utilitiesPinellas County Property Appraiser
pcpao.govPinellas County Impact Fees
Contact Pinellas County for project estimate
Pinellas County Clerk (document recording)
pinellasclerk.orgPSTA Transit (parking waiver reference)
psta.netFlorida Building Code / Private Providers
floridabuilding.orgFL DBPR License
myfloridalicense.comFlorida Power & Light
(800) 226-3545 | fpl.comFEMA Flood Map
msc.fema.govFlorida Bar Lawyer Referral
(800) 342-8011 | floridabar.org9. Frequently Asked Questions
Can I build an ADU in St. Petersburg, Florida?
Yes, in most cases. St. Petersburg's 2022 zoning updates broadly expanded ADU eligibility across multiple neighborhood districts. ADUs are permitted by right in eligible districts when code standards are met. Use the City's GIS eligibility tool to confirm your parcel's eligibility before proceeding.
What is the maximum ADU size in St. Petersburg?
The maximum is 800 sq ft OR 67% of the primary dwelling's floor area — whichever is more restrictive. For a 1,000 sq ft primary home, the ADU cap is 670 sq ft (67% of 1,000), not 800 sq ft. Verify your primary home's floor area at the Pinellas County Property Appraiser before designing.
Does St. Petersburg have a GIS tool to check ADU eligibility?
Yes. The City of St. Petersburg provides a dedicated GIS eligibility tool for parcel pre-checks. Use it to confirm your parcel's district eligibility before hiring anyone. You still need to verify specific setbacks and dimensional standards with Planning & Development Services.
Can I do short-term rentals with my St. Petersburg ADU?
St. Petersburg requires a 30-day minimum rental period in residential zones, which prohibits typical Airbnb and VRBO stays. Build your ADU financial model on long-term rental income of $1,400–$1,900/month for a 1-bedroom unit.
Does St. Petersburg waive parking requirements near transit?
Yes. Parcels near qualifying PSTA high-frequency transit routes may be exempt from the ADU's additional parking requirement. Confirm your parcel's transit proximity with Planning & Development Services before your site plan is finalized.
Is this guide for St. Petersburg the same as Pinellas County?
No. This guide covers the City of St. Petersburg only. Pinellas County, Clearwater, St. Pete Beach, Largo, and other municipalities in Pinellas County have their own separate zoning codes and ADU rules. Confirm your property is within St. Petersburg city limits.
What types of ADUs are permitted in St. Petersburg?
St. Petersburg permits detached backyard cottages, attached ADUs, interior conversions, and above-garage ADUs — depending on your specific zoning district. Not every type is available in every district. Confirm which types are eligible for your parcel with Planning & Development Services.
Important Disclaimers
- This guide is for informational purposes only. St. Petersburg's zoning code, ADU standards, and fee schedules can change. Always verify current requirements directly with Planning & Development Services before making financial commitments.
- The 800 sq ft / 67% dual size limit is specific to the City of St. Petersburg — verify the current limits before designing.
- The 30-day STR minimum is specific to St. Petersburg residential zones — do not build a business model around short-term rental income.
- This guide covers the City of St. Petersburg only — Pinellas County and neighboring municipalities have different rules.
- Florida SB 184 (2025) gives homeowners state-level ADU rights — if a compliant application is denied, consult a Florida land use attorney about state preemption options.
- HOA covenants are independent of government permits — check CC&Rs before proceeding.
- This guide does not constitute legal, tax, or financial advice. Prepared March 2026 | Updated June 2026.
Ready to Check Your St. Pete Property?
Enter your address for a zoning eligibility check — see whether your parcel is in an eligible district, confirm the 800 sq ft / 67% size limit for your home, and get local rules specific to your parcel.
Also see: Pinellas County ADU Rules · ADU Costs in Florida · Florida ADU Laws 2025