7821 3RD AVENUE S ST PETERSBURG FL 33707 MLS #TB8491647

7821 3RD AVENUE S
ST PETERSBURG, FL, 33707
$3,599,999
4 Beds
4.5 Baths
3,850 SqFt
0.19 Acres
Add
MLS #TB8491647 image #0
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.

Property Details

Price:
$3,599,999
MLS #:
TB8491647
Status:
Active
Beds:
4
Baths:
4.5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
SOUTH CSWY ISLE 3RD ADD
Neighborhood:
33707stpetesouthpasadenagulfportstpetebch
Listed Date:
Mar 30, 2026
Finished Sq Ft:
3,850
Total Sq Ft:
4,000
Lot Size:
8,459 sqft / 0.19 acres (approx)
Year Built:
2026
WaterfrontPoolNewconstruction33707 – St Pete/south Pasadena/gulfport/st Pete Bch33707stpetesouthpasadenagulfportstpetebchSouth Cswy Isle 3rd Add

Ask a Question

See this Listing

Send
  

Schools

Interior

Appliances
Cooktop, Dishwasher, Range, Range Hood, Refrigerator
Bathrooms
4 Full Bathrooms, 1 Half Bathroom
Cooling
Central Air
Flooring
Engineered Hardwood
Heating
Central
Interior Features
Ceiling Fan(s), Kitchen/Family Room Combo, Open Floorplan, Walk-In Closet(s)
Laundry Features
Laundry Room
Levels
Two

Exterior

Attached Garage YN
1
Construction Materials
Block, Wood Frame
Covered Spaces
2
Direction Faces
Southeast
Exterior Features
Irrigation System, Outdoor Kitchen
Garage Spaces
2
New Construction YN
1
Roof
Other
Waterfront Features
Freshwater Canal w/Lift to Saltwater Canal

Financial

Tax Year
2025
Taxes
$13,393

Map

Community

Subdivisions in ST PETERSBURG

Market Summary

Current real estate data for Single Family in ST PETERSBURG as of Apr 18, 2026
1,722
Single Family Listed
103
Avg DOM
408
Avg $ / SqFt
$889,299
Avg List Price

Property Summary

    Located in the SOUTH CSWY ISLE 3RD ADD subdivision, 7821 3RD AVENUE S ST PETERSBURG FL is a Single Family for sale in ST PETERSBURG, FL, 33707. It is listed for $3,599,999 and features 4 beds, 5 baths, and has approximately 3,850 square feet of living space, and was originally constructed in 2026. The current price per square foot is $935. The average price per square foot for Single Family listings in ST PETERSBURG is $408. The average listing price for Single Family in ST PETERSBURG is $889,299.

Similar Listings Nearby

broker reciprocity
MLS# TB8478102broker reciprocity
10126 TARPON DRIVE
TREASURE ISLAND, FL

$4,500,000

1.2 miles away

broker reciprocity
MLS# TB8434337broker reciprocity
10178 GULF BOULEVARD
TREASURE ISLAND, FL

$4,500,000

1.4 miles away

broker reciprocity
MLS# TB8472517broker reciprocity
5212 62ND AVENUE S
ST PETERSBURG, FL

$4,500,000

4.9 miles away

broker reciprocity
MLS# TB8486101broker reciprocity
19 BAYFRONT COURT S
ST PETERSBURG, FL

$4,495,000

4.6 miles away

broker reciprocity
MLS# O6369589broker reciprocity
7801 9TH AVENUE S
ST PETERSBURG, FL

$4,445,000

0.5 miles away

broker reciprocity
MLS# TB8487810broker reciprocity
13 TREASURE LN
TREASURE ISLAND, FL

$4,395,000

1.0 miles away

broker reciprocity
MLS# TB8481462broker reciprocity
2503 PASS A GRILLE WAY
ST PETE BEACH, FL

$4,325,000

4.6 miles away

broker reciprocity
MLS# TB8465360broker reciprocity
482 HERMOSITA DRIVE
ST PETE BEACH, FL

$4,275,000

4.6 miles away

broker reciprocity
MLS# TB8467613broker reciprocity
4635 DOLPHIN CAY LANE S
ST PETERSBURG, FL

$4,100,000

4.3 miles away

broker reciprocity
MLS# TB8477321broker reciprocity
5264 61ST AVENUE S
ST PETERSBURG, FL

$4,000,000

4.8 miles away

7821 3RD AVENUE S
ST PETERSBURG, FL