Dunedin vs St. Petersburg
How do retaining walls rules compare between Dunedin, FL and St. Petersburg, FL?
Dunedin and St. Petersburg have similar restriction levels.
Dunedin, FL
Pinellas County
Dunedin requires building permits for retaining walls, particularly those exceeding heights set in the Florida Building Code. Walls supporting surcharge loads or above threshold heights need engineered drawings and may need drainage and grading review.
View full Dunedin rules →St. Petersburg, FL
Pinellas County
St. Petersburg requires building permits for retaining walls over 4 feet tall and engineered drawings for substantial walls under Chapter 16 and Florida Building Code provisions.
View full St. Petersburg rules →Key Facts Comparison
| Fact | Dunedin | St. Petersburg |
|---|---|---|
| Permit required | Yes per Chapter 105 | - |
| Engineering threshold | Typically over 4 feet | - |
| Drainage | Cannot block flow | - |
| Surcharge loads | Engineering always required | - |
| Inspection | Required before backfill | - |
| Permit threshold | - | Over 4 feet |
| Engineering | - | Required for tall walls |
| Code reference | - | Chapter 16 + FBC |
| Coastal review | - | Floodplain admin |
Highlighted rows indicate differences between cities.
Dunedin FAQ
Do I need an engineer for a small landscape retaining wall in Dunedin?
Short decorative walls under code thresholds may not need engineering, but most walls supporting earth or surcharge over a few feet require sealed engineered drawings under Florida Building Code.
Can a retaining wall sit on the property line?
Generally no. Retaining walls must be entirely on the owner's property and cannot encroach into easements or rights-of-way. Setbacks and survey verification apply before permit issuance.
St. Petersburg FAQ
Do I need a permit for a retaining wall in St. Petersburg?
Walls retaining over 4 feet of fill, or any wall with a surcharge load, require a permit and engineered plans. Smaller decorative walls usually do not need a permit.
Can a retaining wall affect my fence height?
Yes, the city measures combined fence and wall height from natural or finished grade for purposes of Section 16.40.040, so a tall wall plus a fence can exceed the 6-foot limit.
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