Seawall & Bulkhead Help in St. Petersburg
Most of the seawall that holds St. Petersburg's shoreline in place belongs to private owners. Here is what recent storms, the city's seawall planning and county permit rules mean for yours.
Tampa Bay: Hillsborough, Pinellas, Pasco, Hernando counties.
What should St. Petersburg owners know about their private seawalls after Helene?
St. Petersburg has about 95 miles of privately owned seawall, and Helene pushed the city's tide gauge to a record 6.31 feet above mean higher high water. Seawall projects here generally need a Pinellas County Water and Navigation permit. Florida Bulk Head accepts inquiries from St. Petersburg and connects owners with a qualified participating contractor when one is available; Barefoot Marine Construction does not work in this region.
How service works in St. Petersburg
Florida Bulk Head is building a network of licensed regional marine contractors. Projects here are reviewed and, where a qualified participating contractor is available, connected with that contractor. Barefoot Marine Construction does not perform work in this region.
Send your project details and photos. We review the request, and if a qualified participating contractor is available for your location and scope, we will ask before sharing your information. If no contractor is available, we will tell you so you can look elsewhere. Read the lead-sharing disclosure.
A City Built Behind Seawalls
The City of St. Petersburg counts about 80,000 linear feet (about 15 miles) of city-owned seawall and about 500,000 linear feet (about 95 miles) of privately owned seawall. The City also notes that Pinellas County has nearly 588 miles of coastline, nearly half of it hardened with seawalls. St Pete Catalyst, quoting the city's engineering director, adds about 20,000 feet owned by federal, state and county agencies.
That split matters. The city's planning work covers its own walls, and the engineering director told St Pete Catalyst the study would not inspect private seawalls, though he expected its guidance to help residents with their own. Private owners remain responsible for keeping their walls sound, and a failing private wall can let water and soil move onto neighboring lots and public streets.
Helene's Record Tide, in Context
The National Hurricane Center reports that the St. Petersburg NOS tide gauge, which has the longest record in Tampa Bay (back to 1947), reached 6.31 feet above mean higher high water during Hurricane Helene in September 2024. That beat the previous record of 3.97 feet set by Hurricane Elena in 1985. Within Tampa Bay, inundation reached 5 to 7 feet above ground. In Pinellas County, 12 people drowned in the surge; media reports cited by the NHC place 2 of those deaths in St. Petersburg.
The city's February 2026 seawall outreach presentation gives a longer view. It cites a NOAA relative sea level trend at the St. Petersburg gauge of 3.13 millimeters per year from 1947 to 2024, equivalent to about 1.03 feet in 100 years. Under a heading on common misconceptions, the same presentation asks what Helene's surge forecast ranges mean in relation to your property, then explains tidal datums such as mean higher high water.
Do not compare surge numbers to your cap height
Helene's 6.31 ft is measured above mean higher high water. Seawall caps are usually surveyed in feet NAVD88, the datum the city uses in its own seawall elevation summary. Ask a surveyor or engineer to convert both to one datum for your property.
What the Seawall Master Plan Covers
The Strategic Seawall Capital Improvement Plan is funded through a federal Community Development Block Grant Mitigation (CDBG-MIT) agreement administered by FloridaCommerce. According to the city, the study inspected more than 224 individual city-owned walls, roughly 81,000 linear feet, using diver field teams, rating each one on an ASCE condition scale from Good to Critical and documenting construction type and adjacent uplands. The presentation shows concrete, vinyl and steel as common seawall materials in the city.
| Strategy | When the city describes using it |
|---|---|
| Repair and retrofit | Wall rated Fair or better with adequate remaining service life (10 years or more) |
| Replace in kind | Wall rated Poor or worse where space is a constraint or the wall is already high |
| Replace and raise | Wall rated Poor or worse that will be overtopped by king tides before the end of its service life |
| Revetment | Sloped riprap shoreline |
| Hybrid green and gray shoreline | Sloped shoreline with a rock sill, vegetated slope, planters, breakwater or groins |
| Natural living shoreline | Sloped shoreline of native plantings |
These strategies were written for public walls, but they are a useful framework for a private owner's conversation with an engineer. Bay News 9 reported in February 2026 that the city's survey asked residents whether they would support raising the minimum required elevation for private seawalls, the city taking ownership of private seawalls, or a citywide assessment to maintain private walls. The city held two virtual public meetings that month and says the feedback will go into the final Seawall Master Plan report; the project page did not link a final report when we checked, and we found no adopted change to private seawall requirements as of this review. If the city adopts one, it could affect when and how high a private wall must be rebuilt.
Permits for Private Seawalls in St. Petersburg
Pinellas County's Water and Navigation section permits seawalls, riprap, docks and tie poles in every city in the county, including St. Petersburg. Applications go through the Pinellas County Access Portal, and the county reviews environmental impacts, navigation and construction requirements. Its Coastal Environmental Resource Zone map shows whether a property is near known seagrass or mangroves. Ask your contractor to confirm what building permit the City of St. Petersburg requires as well; we did not verify the city's own seawall permit type for this guide.
DEP describes the Pinellas County Aquatic Preserve as including all state-owned submerged land within the county, with estuarine basins that include Boca Ciega Bay, southwestern Tampa Bay and Riviera Bay. Section 258.42, F.S., allows approval of seawall restoration up to 18 inches waterward of the old location in an aquatic preserve, while DEP's rule (18-20.004, F.A.C.) exempts restoration only within one foot from applying for consent of use, so confirm the allowable shift with DEP. Pinellas also has its own bulkhead line law: section 253.66, F.S., says that once the county's water and navigation authority fixed a bulkhead line around the mainland and offshore islands and the state's trustees approved it, no further change may be made. Ask the county how that line relates to your lot. See the Pinellas County permit guide for the full list of agencies.
Milton's Rain and What Happens Behind the Wall
Milton's surge in Tampa Bay was only 1 to 2 feet because offshore winds pushed water out of the bay, but the NHC reports its maximum storm total rainfall, 20.40 inches, at a site near St. Petersburg, with widespread urban flooding. Heavy rain loads the soil behind a seawall. If weep holes and filter fabric are clogged or missing, water pressure builds and fill can wash out through joints. After a big rain, look for new depressions behind the cap, open joints and stained or bulging panels, and use the Seawall Health Check to sort what you see.
Choosing a Contractor for a St. Petersburg Seawall
- Verify the license is active on the state's DBPR license search (opens in a new tab).
- Ask for certificates of liability and workers' compensation insurance.
- Confirm who files the Pinellas County Water and Navigation application and the city building permit.
- Ask what elevation the new cap will be built to, in NAVD88, and whether the design can be raised later.
- Ask how the wall will tie into your neighbors' walls so water cannot flow around the ends.
- Ask how old CCA-treated lumber, such as pilings, will be disposed of. Pinellas County says it must go to a permitted landfill, not household trash.
Florida Bulk Head accepts project inquiries from St. Petersburg and connects owners with a qualified participating contractor when one is available, subject to availability. Barefoot Marine Construction does not perform work in this region.
Shorelines and waterways in St. Petersburg
Tampa Bay waterfront
Downtown and the northeast neighborhoods face the bay. The St. Petersburg tide gauge set its station record, 6.31 ft above mean higher high water, in Helene.
Boca Ciega Bay
The west side of the peninsula, behind the barrier islands. It is an aquatic preserve within the larger Pinellas County Aquatic Preserve.
Riviera Bay
A St. Petersburg embayment that appears in the city's municipal seawall inspection photos. It is listed among the Pinellas County Aquatic Preserve's estuarine basins.
Local construction considerations
Private Walls, Private Responsibility
About 95 miles of the city's seawall is private. The city's plan inspects only municipal walls, so condition checks on private walls are up to owners.
County Permit Inside City Limits
Pinellas County Water and Navigation permits seawall and riprap work inside St. Petersburg. Plan for county and city review.
Aquatic Preserve Waters
State-owned submerged land in the county is part of the Pinellas County Aquatic Preserve, which can limit how far a rebuilt wall may move waterward.
Elevation Policy Could Change
The city has asked residents about raising the minimum elevation for private seawalls. We found no adopted change as of this review; check before you design.
Drainage Matters After Big Rain
Milton's 20.40 inches near St. Petersburg is a reminder that weep holes, filter fabric and joint condition protect the fill behind a wall.
Common seawall concerns
- Fill loss and sinkholes behind the cap after surge or heavy rain. See sinkholes.
- Cracked caps and spalling concrete on older walls. See cracked caps.
- Leaning panels from corroded tie-backs. See tie-back failure.
- Low walls that tidal water overtops, which the city's plan addresses on public walls with its replace-and-raise strategy.
- Open joints that let soil escape with each tide. See joint separation.
Regional cost factors
- The design elevation of the new cap and whether the wall is built so it can be raised later.
- Whether a hybrid or riprap-faced design is required or chosen instead of a plain vertical wall.
- Seagrass or mangroves near the property, shown on the county's Coastal Environmental Resource Zone map.
- Access for equipment, and removal and reinstallation of docks, lifts and landscaping.
- Disposal of old CCA-treated lumber at a permitted landfill, as Pinellas County requires.
Permitting agencies and local rules
- Pinellas County: Water and Navigation permits are required for seawalls, riprap, docks, tie poles and all dredging or filling in county waters, including inside St. Petersburg. Official source
- Pinellas County (state law): Section 253.66, F.S.: once the county's water and navigation authority fixed a bulkhead line and the state's trustees approved it, no further change may be made. Official source
- Pinellas County Water and Navigation (docks, seawalls, dredge and fill)
- Pinellas County storm recovery permits
- City of St. Petersburg Citywide Seawall Master Plan
- Florida DEP Southwest District
Requirements depend on your exact property, waterway and scope. Confirm with each agency. See the Florida seawall permit guide.
More communities in Tampa Bay
Bulkhead and seawall services through the partner network
St. Petersburg seawall and bulkhead questions
Does the city's seawall master plan cover my private seawall?
No. The plan inventories and prioritizes city-owned walls, and city engineering staff said the study would not inspect private seawalls. The city did ask residents whether they would support changes affecting private walls, so watch for policy updates.
Is there a minimum seawall height for private walls in St. Petersburg?
We did not find an adopted change to private seawall elevation requirements as of this review. The city's 2026 survey asked residents about raising the minimum required elevation for private seawalls. Confirm the current requirement with the city and your engineer before design.
Who issues seawall permits in St. Petersburg?
Pinellas County's Water and Navigation section permits seawalls and riprap in all Pinellas cities, including St. Petersburg. A building permit may also be needed, and state agencies can be involved where work touches state-owned submerged land. Your contractor should confirm each one.
Can I move my new seawall farther into the water?
Only a small amount, if at all. Pinellas waters are part of an aquatic preserve, where state law allows approval of restoration up to 18 inches waterward and DEP's rule exempts restoration only within one foot from a consent application. County review and the Pinellas bulkhead line apply on top of that, so confirm the limit before you design.
Does Florida Bulk Head have a contractor in St. Petersburg?
No participating contractor is confirmed in this region yet. Florida Bulk Head accepts inquiries and connects owners with a qualified participating contractor when one is available. Barefoot Marine Construction does not perform work in this region.
Sources and references
- Citywide Seawall Master Plan — City of St. Petersburg. Accessed November 2, 2026.
- Strategic Seawall Capital Improvement Plan: Public Outreach Meeting (February 2026) — City of St. Petersburg. Accessed November 2, 2026.
- City begins holistic review of 600,000 feet of seawall — St Pete Catalyst. Accessed November 2, 2026. News report quoting the city's director of engineering and capital improvements.
- Stronger Seawalls: St. Pete wants community input before launching master plan — Bay News 9. Accessed November 2, 2026.
- Tropical Cyclone Report: Hurricane Helene (AL092024) — NOAA National Hurricane Center. Accessed November 2, 2026.
- Tropical Cyclone Report: Hurricane Milton (AL142024) — NOAA National Hurricane Center. Accessed November 2, 2026.
- Docks / Dredge & Fill (Water and Navigation) — Pinellas County. Accessed November 2, 2026.
- Pinellas County Aquatic Preserve — Florida Department of Environmental Protection, Florida Aquatic Preserves. Accessed November 2, 2026.
- Rule 18-20.004, F.A.C. (aquatic preserve management policies and standards) — Florida Department of State, Florida Administrative Code. Accessed November 3, 2026.
- Section 253.66, Florida Statutes — Florida Legislature. Accessed November 3, 2026.
- Section 258.42, Florida Statutes — Florida Legislature. Accessed November 2, 2026.
Regulations, programs and conditions change. Always confirm requirements with the agency that has jurisdiction over your property.