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This home is in Rivertown Springs, St. Johns — a new construction home in St. Johns County.

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Sold

Sold·Closed Jun 15, 2026·74 days on market·Recent sales in Rivertown Springs·Rivertown Springs

378 Sir Barton Drive

St. Johns, FL 32259

$849,000sold priceListed at $864,000 · 98.3% of asking$233/sqftMLS# 2130796

Beds

4.5

Baths

3,644

Sq Ft

2025

Built

Garage

Pool

15 more homes for sale in Rivertown Springs →Search Rivertown Springs on the map

HOA $4/moSingle Family Residence1 storyNew construction

About this home

Rivertown Springs

Lot 82 - Discover the Onyx, a beautifully crafted 4-bedroom, 4.5-bath home with generous living space and a 3-car garage that blends comfort with sophistication. Off the foyer, a private study replaces the flex room, creating an ideal home office or quiet retreat. The chef-inspired kitchen features a large island and convenient morning kitchen near the walk-in pantry, flowing seamlessly into the open Great Room and covered lanai for effortless indoor-outdoor living. The owner's suite offers a spa-like bath and oversized walk-in closet, while each secondary bedroom includes its own private bath and walk-in closet, with Bath 2 upgraded to a walk-in shower. Located in RiverTown along the St. Johns River, residents enjoy parks, trails, lakes, fitness amenities, and a vibrant outdoor lifestyle.

Next steps in Rivertown Springs

Cost to own

True monthly cost

What this home actually costs per month at the asking price — not just the mortgage.

Principal & interest20% down · 7.4% · 30yr$4,703

Property taxesest. at asking price, St. Johns County$1,130

HOAbilled annually$4

Estimated total, before insurance$5,837/mo

• Homeowners insurance is on top — in Florida it varies widely with roof age and wind/flood zone (see the Reality Check below). Budget it before you offer.
• In CDD communities (Nocatee, eTown, Seven Pines…), bond assessments are collected on the property-tax bill, and the amount varies home to home — a prior owner may have prepaid the bond — so we confirm this home’s exact line rather than trust a community average.
• Taxes are estimated at YOUR purchase price — Florida assessments reset on sale, so the seller’s current bill is usually lower than yours will be.

Mortgage calculator — adjust rate & down payment

Cost to own

Mortgage calculator

Home Price

$849,000

Down Payment: 20%

$169,800

Interest Rate: 7.40%

Loan Term

Monthly Payment

$4,703

Principal & Interest: $4,703

Property taxes (est.): $1,130

Insurance (est.): $566

Estimated Total Monthly

$6,398

*30-year loan at 7.4% APR (avg 30-yr rate 2026-10-08, Freddie Mac PMMS via FRED). Taxes use the county effective rate; insurance is a rough estimate — Florida premiums swing with roof age and flood zone (see the Reality Check). Actual costs may vary.

Storms & insurance

Florida Reality Check

The storm-and-insurance facts every Florida buyer should know up front.

Flood zone not yet determined

Check the exact parcel at msc.fema.gov or ask Krista to pull it.

Flood damage is not covered by standard homeowners insurance — it’s always a separate policy.

Evacuation zone not yet determined

Check floridadisaster.org/knowyourzone.

Roof: Shingle — year not disclosed (home built 2025)

Roof age drives Florida insurance pricing more than anything else — worth confirming before you offer.

Krista can connect you with local insurance quotes before you make an offer.

Ask about this home

This Reality Check is informational only — it draws on FEMA/FDEM hazard layers, Florida DOH water records, and the listing’s own fields at this property’s coordinates. None of it is a determination, survey, or inspection, and public records can lag or conflict with on-site conditions. Independently verify anything you’ll rely on: the flood zone at msc.fema.gov and floridadisaster.org/knowyourzone (and confirm flood-insurance cost with your lender and a licensed insurance agent), and the sewer/septic, roof, and utilities with a professional inspection.

Sun & Light

Northwest-facing backyard — summer sunsets, gentle days

The listing reports the home facing southeast, which puts the backyard on the northwest side. Today at this address: sunrise 7:26 AM, sunset 7:01 PM.

The rear sits softly lit through most of the day, then catches the late golden hour — in summer the sun sets almost straight into this exposure.
Cooler than a true west lot with some of the sunset payoff; winter evenings go dark early.

Orientation per the MLS listing; sun paths are seasonal geometry for Northeast Florida, not a shade study — trees, screening, and neighboring structures change the picture on any specific lot.

Closed sales

What sold nearby

Closed sales within about two miles in the last 18 months, same property type, similar size. Closed prices from the MLS, not estimates. Their median is $277/sq ft; this home is listed at $237/sq ft.

Address	Closed	Price	$/sq ft	Bd/Ba	Sq ft	DOM	Miles
371 Sir Barton Drive, St. Johns, FL 32259Listed by MATTAMY REAL ESTATE SERVICES	Aug 2026	$750,000	$277	3/3	2,705	125	0
326 Sir Barton Drive, St. Johns, FL 32259Listed by MATTAMY REAL ESTATE SERVICES	Sep 2026	$750,000	$277	3/3	2,705	173	0.1
442 Sir Barton Drive, St. Johns, FL 32259Listed by MATTAMY REAL ESTATE SERVICES	Aug 2026	$749,000	$277	3/3	2,705	144	0.1
85 Black Horse Way, St. Johns, FL 32259Listed by MATTAMY REAL ESTATE SERVICES	Jul 2026	$1,138,627	$260	5/4.5	4,375	21	0.2
86 Black Horse Way, St. Johns, FL 32259Listed by MATTAMY REAL ESTATE SERVICES	Sep 2026	$962,673	$286	4/3.5	3,368	10	0.3
365 Holly Creek Drive, St. Johns, FL 32259Listed by MATTAMY REAL ESTATE SERVICES	Sep 2026	$672,758	$225	5/4	2,987	11	0.3

Sold data from the realMLS IDX feed. A closed price is what a buyer paid, not what this home is worth; Krista runs the adjustments per home.

Features

Price$864,000

Price / Sq Ft$237

Bedrooms4

Bathrooms4.50

Full Baths4

Half Baths1

Square Footage3,644

Year Built2025

TypeResidential

Sub-TypeSingle Family Residence

Property ConditionUnder Construction

StatusClosed

# of Garages3

Has PoolNo

Is WaterfrontNo

New ConstructionYes

Direction FacesSoutheast

Community Information

Address378 Sir Barton Drive, St. Johns, FL 32259

Area302-Orangedale Area

SubdivisionRivertown Springs

CitySt. Johns

CountySt. Johns

StateFL

Zip Code32259

Parcel Number0009730820

Amenities

AmenitiesPool, Basketball Court, Children's Pool, Clubhouse, Dog Park, Fitness Center, Jogging Path, Park, Pickleball, Playground, Tennis Court(s)

Community FeaturesSidewalks, Restaurant

UtilitiesElectricity Connected, Sewer Connected, Water Connected

SewerPublic Sewer

Water SourcePublic

ParkingAttached, Garage, Garage Door Opener

ViewTrees/Woods

Interior

Interior FeaturesBreakfast Bar, Entrance Foyer, Kitchen Island, Open Floorplan, Pantry, Primary Bathroom - Shower No Tub, Smart Thermostat, Walk-In Closet(s)

AppliancesDishwasher, Disposal, Double Oven, Dryer, Freezer, Gas Cooktop, Microwave, Plumbed For Ice Maker, Refrigerator, Tankless Water Heater, Washer

HeatingCentral

CoolingCentral Air

# of Stories1

Exterior

Lot DescriptionSprinklers In Front, Sprinklers In Rear

Patio / PorchCovered, Front Porch

RoofShingle

ConstructionFiber Cement, Frame

Additional Information

Date ListedFebruary 18, 2026

Days on Market74

HOA Fees$53 / Annually

HOA FrequencyAnnually

Listing TermsCash, Conventional, FHA, VA Loan, Other

55+ CommunityNo

New ConstructionYes

Listing Courtesy of: MATTAMY REAL ESTATE SERVICES

Information deemed reliable but not guaranteed. Data provided through the IDX program of realMLS (Northeast Florida Multiple Listing Service). © 2026 Northeast Florida Multiple Listing Service, Inc. All rights reserved.

The neighborhood

About Rivertown Springs

Rivertown Springs is a neighborhood in RiverTown, FL (St. Johns County), ZIP 32259.

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