7821 3RD, ST PETERSBURG, FL 33707
$3,599,999
Beds: 4
Baths: 4 Full / 1 Half
Sq. Ft.: 3,850 Sq. Ft.
Year Built: 2026
Lot Size: 0.19 Acres
Garage: 2
Pool: Yes
DOM: 4








































Property Overview
Status: Active
Property Type: Residential
MLS #: ea7900d2f1ceb84f77e5a6d8335c7fb7
Subdivision: SOUTH CSWY ISLE 3RD ADD
County: Pinellas
HOA Fee: N/A
Year Built: 2026
Construction: Block, Wood Frame
Foundation: Stilt/On Piling
Roof: Other
Cooling: Central Air
Heating: Central
Sewer: Public Sewer
Water Source: Public
Zoning: N/A
Tax Amount: $13,393.03 (2025)
Listed On: Mar 30, 2026
Description
Pre-Construction. To be built. Pre-Construction | To Be Built | Causeway Isles Waterfront Build your dream home on one of St. Petersburg’s most desirable open-water homesites in the heart of Causeway Isles. Located at 7821 3rd Ave S, this exceptional property offers over 100 feet of deep saltwater frontage with a protected yacht slip suitable for vessels up to 80 feet. Enjoy expansive water views, peaceful surroundings, and unforgettable sunset skies overlooking Sunset Park—perfectly capturing the essence of waterfront living. This prime location places you just minutes from downtown St. Pete, the beaches of Treasure Island, and direct access to the Intracoastal Waterway, making it ideal for both boating and everyday convenience. A new seawall installed in May 2025 adds long-term value and confidence as you plan your future residence. The lot comfortably supports a custom home in the 3,850+ square foot range, allowing for a thoughtfully designed layout that embraces indoor-outdoor living. A proposed concept features a 4-bedroom, 4.5-bath design with a private pool, outdoor kitchen, spacious covered lanai, and optional elevator. The architecture leans toward a modern coastal style, incorporating clean lines, natural light, and expansive glass to highlight the water views. Neo Homes offers a full turnkey design-build approach, including: Custom architecture and interior design High-end, curated finish selections Hurricane-rated construction built to Florida standards A streamlined, start-to-finish building experience This is an opportunity to create a personalized waterfront residence tailored to your lifestyle in a well-established boating community. If you’ve been searching for a premium waterfront homesite in St. Petersburg, this property is truly worth exploring.Note: Photos shown are from a previously completed home by Neo Homes and are intended to represent the quality, craftsmanship, and level of finishes available for this homesite.
Exterior Features
Irrigation System, Outdoor Kitchen
Directions
I-275 South to St. Petersburg Take Exit 22 (5th AVE North) to 66th St. Turn left South on 66th Street to Central Avenue. Turn Right West on Central Ave towards the beaches. Turn South (left) on 79th ST S. Turn left East on 3rd AVE S. End of street on left.
School Information
Elementary: N/A
Middle: N/A
High: N/A
Location
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*Estimate includes Principal & Interest (P&I) only. It does not include taxes, insurance, HOA fees, or PMI. Rates and payments may vary. Consult a lender for accurate figures.
Listing Information
Provided Courtesy of:
PHIL DESAUTELS P.A.
Listing Agent: Sheila Desautels
Information is deemed reliable but not guaranteed. Information provided is for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Data last updated: April 3, 2026, 9:20 pm UTC
MLS Source: Stellar MLS Copyright © 2026
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