Seawall Repair in Treasure Island

Getting to know Treasure Island

Treasure Island's name is said to come from a 1915 sales stunt: property owners buried wooden chests on the beach and then 'discovered' them to boost lot sales. The 1848 Great Gale carved John's Pass at the north end and split off the Isle of Palms and Isle of Capri. The city incorporated in May 1955 and had about 6,600 residents in 2020.

Homes and hotels went up from the end of World War II through the 1950s, often on land made from dredged fill and laid out for access to Boca Ciega Bay. The result is the network of finger isles and canals on the city's bay side.

The shoreline in Treasure Island

Because so much of the residential land was created in the same postwar decade, many canal walls here are of a similar age and construction. When one fails, the walls on either side are often near the end of their lives too.

What Treasure Island owners ask about most

• Seawall Replacement

  Isle of Palms and Isle of Capri lots have walls from the same postwar build-out, and many are reaching replacement age.

• Seawall Height Raise

  Low finger-isle streets flooded in 2024, and owners rebuilding are asking about height.

• Seawall Crack & Joint Repair

  Dredged fill behind older walls washes out through open joints.

Who permits seawall work in Treasure Island

Seawalls, docks and riprap throughout Pinellas, inside cities and out, go through Pinellas County Water and Navigation for permits.

Inside Treasure Island city limits, landside building permits go through the City of Treasure Island Building Department at 10451 Gulf Blvd, Treasure Island, FL 33706, (727) 547-4575 ext. 230. For an unincorporated parcel with a Treasure Island mailing address, Pinellas County Building Services handles that part instead.

Prepare for your Treasure Island estimate

• Ask how the new wall will tie into neighbors' walls at each end
• Confirm whether the city or County handles each part of the approval
• Look for rust stains or loose concrete along the cap
• Note whether water has topped the wall during king tides

What seawall work costs in Treasure Island

Prices depend on length, damage and access. Published ranges give you a baseline. When neighbors replace at the same time, shared barge mobilization can bring the per-lot cost down on these canals.

Reference figures, not quotes. Angi, seawall repair cost (2026 data): about $100–$250 per linear foot for repairs. LatestCost, Florida seawall replacement (2026): about $500–$1,200 per linear foot. HomeAdvisor, sea wall cost: average $25,000, typical $15,000–$60,000. Checked October 2026.

Neighboring communities

• Redington ShoresBoca Ciega Bay
• Madeira BeachBoca Ciega Bay and John's Pass
• St. Pete BeachBoca Ciega Bay and Long Key canals
• Tierra VerdeThe canals between its six sections and the mouth of Tampa Bay