Bolthole Index

Pinellas County, Florida

Zoning, building permits and septic rules in Oldsmar, Florida

The City of Oldsmar, Florida, in Pinellas County, adopts and enforces its own zoning through its Land Development Code1. For a building permit, the city's Building Division approves zoning, flood and fire items first, then Pinellas County issues the Florida Building Code permit2. Septic permits come from the Florida Department of Health in Pinellas County3.

At a glance

Zoning
Yes, Oldsmar's own Land Development Code1
Building permit
City approval first, then a Florida Building Code permit from Pinellas County2
Septic
Florida Department of Health in Pinellas County3
Minimum home size
1,250 sq ft in R-1 and R-2; 1,800 in E-2; 2,000 in E-14567
Minimum lot (R-1)
8,700 sq ft, 75 ft wide, 100 ft deep8
Accessory dwellings
Limited; detached ADUs up to 800 sq ft in the Town Center Residential district9
Flood zones
Manufactured homes in flood hazard areas need an elevation certification10

Who to call

Building permits

City of Oldsmar Building Division

Zoning and land use approval, flood review and pre-permit approval letters inside Oldsmar; Florida Building Code permits are issued by Pinellas County

813-749-1124

building@oldsmarfl.gov

Planning & zoning

City of Oldsmar Planning Division

Rezoning, variances, site plans and zoning map questions inside Oldsmar

813-749-1124

100 State St. W. Oldsmar , FL 34677

Building permits

Pinellas County Building and Development Review Services Department

Issues Florida Building Code permits for projects in Oldsmar after city approval

(727) 464-3888

buildingservices@pinellas.gov

440 Court Street, Clearwater, FL 33756

Septic permits

Florida Department of Health in Pinellas County

Septic (OSTDS) permitting and inspection in Pinellas County

Contact details are copied from each office’s official page and were checked against it on October 16, 2026.

Off-grid gear

Going off-grid in Oldsmar means bringing your own water and power. The kit we’d start with:

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Does Oldsmar, FL have zoning, and what does it mean for lot size and setbacks?

Yes. Oldsmar adopts its own zoning through the city's Land Development Code, with residential districts E-1, E-2, R-1 and R-2 plus others such as the Town Center111. Rules differ by district.

In R-1, lots need at least 8,700 square feet, 75 feet of width and 100 feet of depth8, with setbacks of 25 feet front, 7.5 feet side and 10 feet rear12. In R-2, the minimum lot is 6,000 square feet13 and the side setback is 6 feet14. E-2 lots start at 16,500 square feet15, and E-1 estate lots at 40,000 square feet16.

Buildings in R-1 top out at 35 feet17, and lot coverage is capped at 50 percent, up to 65 percent with a pool18. These are city rules for land inside Oldsmar, not for unincorporated Pinellas County.

What is the minimum house size in Oldsmar?

Minimum floor area depends on the district. R-1 and R-2 require at least 1,250 square feet45. E-2 requires 1,800 square feet6, and E-1 requires 2,000 square feet7. Tiny homes under those sizes are therefore not an option in these districts, and we could not confirm a separate tiny-home rule; ask the Planning Division.

Do you need a building permit in Oldsmar, and who issues it?

Two offices are involved. Under an interlocal agreement, all Florida Building Code permits for Oldsmar are issued by Pinellas County2. Before that, the city's Building Division handles zoning and land use approval, flood review, public works and fire approvals, then issues a pre-permit approval letter2.

Properties in the community redevelopment area or along the Tampa Road corridor also need architectural approval from the city2. Florida's statewide building code applies in the city19.

We could not confirm Oldsmar-specific owner-builder rules or fees. Pinellas County says owner-builders may start the application but must appear in person for affidavit verification20; confirm with the county that this applies to city projects. Pinellas County Building and Development Review Services is at 440 Court Street, Clearwater21.

How do septic permits work inside Oldsmar?

Septic permitting and inspections in Pinellas County are handled by the Florida Department of Health in Pinellas County, not by the state's environmental agency322. Florida requires a permit to install, repair, modify or abandon an onsite septic system23.

Whether a given Oldsmar lot must connect to city sewer instead is not something we could confirm; ask the City of Oldsmar Building Division before assuming a septic system is allowed. Across Pinellas County, USDA rates almost none of the soil as suitable for a conventional drain field, so expect an engineered system if sewer is not available24.

Can you build an accessory dwelling or live in an RV in Oldsmar?

In the Town Center Residential district, one accessory dwelling per lot is allowed, a detached unit may not exceed 800 square feet, and the owner must live on the property9. We did not confirm accessory dwelling rules in other districts.

For RVs, the only city rule we confirmed covers overnight camping in city parks, which is limited to designated areas or with permission from the department director25. Living in an RV on a private lot in Oldsmar is unconfirmed; ask the Planning Division.

Building a home in Oldsmar: the steps, in order

  1. Confirm the lot's zoning district with the Planning Division and check lot size, setbacks and minimum home size above1.
  2. Ask the City of Oldsmar Building Division to start the staff review for zoning, flood, public works and fire approvals2.
  3. Get architectural approval if the lot is in the community redevelopment area or on the Tampa Road corridor2.
  4. Receive the city's pre-permit approval letter, then apply to Pinellas County for the Florida Building Code permit2.
  5. If the lot has no sewer, apply to the Florida Department of Health in Pinellas County for a septic permit3.
  6. Manufactured homes placed in flood hazard areas need an elevation certification of the lowest floor10.

What stays with Pinellas County, and what to check before you buy in Oldsmar

Septic permits, and the issuing of building code permits, sit with the county even for Oldsmar addresses32. The county's own zoning applies only to unincorporated Pinellas County; the county's page limits its zoning resources to unincorporated land26. For land outside city limits, see the Pinellas County page.

Pinellas County's typical home insurance premium runs about $4,764 a year27, and its effective property tax rate is 0.7%28. Check the flood zone first, since flood zones add review steps29.

Watch-outs

  • Do not assume the city issues the building permit: Pinellas County issues Florida Building Code permits for Oldsmar after the city's approval2.
  • We could not confirm Oldsmar's rules for tiny homes, RV living on private land, permit fees or owner-builders; call the Building Division at 813-749-11242.
  • Oldsmar's website notes the 2026 Florida Building Code takes effect December 31, 20262.

Sources

  1. Oldsmar LDC 5.4.3 R-1 residential single-family district (Oldsmar), quoted and re-checked
  2. City of Oldsmar Building Division (myoldsmar.com)
  3. Onsite Sewage Disposal and Septic Tanks, quoted and re-checked
  4. Oldsmar LDC 5.4.3 R-1 residential single-family district (Oldsmar), quoted and re-checked
  5. Oldsmar LDC 5.4.4 R-2 residential single-family district (Oldsmar), quoted and re-checked
  6. Oldsmar LDC 5.4.2 E-2 estate residential district (Oldsmar), quoted and re-checked
  7. Oldsmar LDC 5.4.1 E-1 estate residential district (Oldsmar), quoted and re-checked
  8. Oldsmar LDC 5.4.3 R-1 residential single-family district (Oldsmar), quoted and re-checked
  9. Oldsmar Town Center Code 3.3.6 Accessory dwellings (Oldsmar), quoted and re-checked
  10. Oldsmar LDC 6.10.3 Manufactured homes (inspections) (Oldsmar), quoted and re-checked
  11. Oldsmar LDC 5.4.1 E-1 estate residential district (Oldsmar), quoted and re-checked
  12. Oldsmar LDC 5.4.3 R-1 residential single-family district (Oldsmar), quoted and re-checked
  13. Oldsmar LDC 5.4.4 R-2 residential single-family district (Oldsmar), quoted and re-checked
  14. Oldsmar LDC 5.4.4 R-2 residential single-family district (Oldsmar), quoted and re-checked
  15. Oldsmar LDC 5.4.2 E-2 estate residential district (Oldsmar), quoted and re-checked
  16. Oldsmar LDC 5.4.1 E-1 estate residential district (Oldsmar), quoted and re-checked
  17. Oldsmar LDC 5.4.3 R-1 residential single-family district (Oldsmar), quoted and re-checked
  18. Oldsmar LDC 5.4.3 R-1 residential single-family district (Oldsmar), quoted and re-checked
  19. 61G20-1.001 Florida Building Code Adopted (Florida statewide rule), quoted and re-checked
  20. Permitting Guide, quoted and re-checked
  21. Pinellas County Building and Development Review Services Department (pinellas.gov)
  22. Florida Department of Health in Pinellas County (pinellas.floridahealth.gov)
  23. OSTDS Construction Application (Florida statewide rule), quoted and re-checked
  24. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  25. Oldsmar Code Sec. 42-121 Camping (Oldsmar), quoted and re-checked
  26. Zoning & Land Use - Pinellas County, quoted and re-checked
  27. Typical home insurance premium: Bolthole Index county data
  28. Effective property tax rate: Bolthole Index county data
  29. Pinellas County Building and Development Review Services Permitting Guide, quoted and re-checked

Written October 16, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Oldsmar

Oldsmar’s own rules

  • Local zoningPresent

    Land inside Oldsmar city limits

    “the r-1, single-family residential district shall provide for suburban-type development of lands that are designated in the comprehensive plan as residential low.”
  • Zoning districtsPublished

    Residential districts E-1, E-2, R-1, R-2 in Oldsmar city (others exist, e.g. CL-20/30, Town Center)

    “The E-1, estate residential district is established to provide very low density, large”
  • Minimum dwelling sizeSpecified

    E-1 estate residential district, Oldsmar city

    minimum floor area: >= 2000 sq ft

    “5.4.1.6. minimum dwelling unit size. minimum floor area: 2,000 square feet.”
    3 more reviewed findings on this topic
  • Minimum lot sizeSpecified

    E-1 estate residential district, Oldsmar city

    minimum lot area: >= 40000 sq ft · minimum lot width: >= 125 ft · minimum lot depth: >= 125 ft

    “minimum lot area: 40,000 square feet. minimum lot width: 125 feet. minimum lot depth: 125 feet.”
    3 more reviewed findings on this topic
  • SetbacksSpecified

    R-1 district, Oldsmar city

    • Waterfront residential structures 25 ft from mean high-water mark (5.1.6)

    front: >= 25 ft · side: >= 7.5 ft · rear: >= 10 ft

    “5.4.3.7. minimum lot setbacks. front: 25.0 feet. side: 7.5 feet. rear: 10.0 feet.”
    3 more reviewed findings on this topic
  • Lot coverageSpecified

    E-1 estate residential district, Oldsmar city

    • Up to 60 percent with pool (5.4.1.8)

    maximum lot coverage: <= 40 percent (pools up to 60 percent)

    “maximum lot coverage: 40 percent (except as permitted for pools under section 5.4.1.8).”
    3 more reviewed findings on this topic
  • Building heightSpecified

    E-1 estate residential district, Oldsmar city

    maximum building height: <= 35 ft

    “5.4.1.4. building height regulations. maximum building height: 35 feet.”
    One more reviewed finding on this topic
  • Camping on your landLimited

    Overnight camping in Oldsmar city parks (private-land camping rule not located)

    • Only in designated areas or with permission of the department director or designee
    “for overnight camping except within such areas, if any, as may have been provided for such use unless permission has been obtained by the department director or designee.”
  • Accessory dwellingsLimited

    Accessory dwellings in Oldsmar Town Center Residential (TCR) district

    • One accessory dwelling per lot
    • Detached ADU max 800 sq ft habitable area
    • Owner must occupy principal or accessory dwelling; affidavit and recorded covenant
    • Max 3 occupants
    • Connected to city water and sewer via the principal dwelling, no separate meter
    • Other districts not determined

    max detached ADU area: <= 800 sq ft

    “2. no detached accessory dwelling shall exceed 800 square feet of habitable area.”
  • Building in a floodplainRequired

    Manufactured homes in flood hazard areas inside Oldsmar city (Article VI)

    • Elevation certification of lowest floor submitted on placement
    • Inspection against conditions of the issued permit
    “the building official shall inspect manufactured homes that are installed or replaced in flood hazard areas to determine compliance with the requirements of this article and the conditions of the issued permit. upon placement of a manufactured home, certification of the elevation of the lowest floor shall be submitted to the building official.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Oldsmar or Pinellas County directly.

  • Building permit — Building permits inside Oldsmar city
  • Owner-builder exemption — Owner-builder inside Oldsmar city
  • Building code adopted — Building code inside Oldsmar city
  • Inspections — Building inspections inside Oldsmar city
  • Certificate of occupancy — Certificates of occupancy inside Oldsmar city
14 more unanswered
  • Tiny homes
  • Manufactured homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Short-term rentals
  • Permit fees
  • Permit process

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Oldsmar publishes no rule on the point, not that none exists. Pinellas County’s page lists the county offices to call.

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