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Representative exterior photo of a completed home built from the Onyx by Mattamy Homes in RiverTown - Springs, St. Johns, FL (Image 1).
Floor plan
  • 4 bd
  • 4.5 ba
  • 3,644 sqft

Onyx plan in RiverTown - Springs by Mattamy Homes

St. Johns, FL
from $814,990

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Plan description

When the need arises for accommodating extended family or creating a dedicated private space, the Onyx plan's adaptable flex room offers immediate solutions. This versatile area, complete with an optional private entrance and even its own garage bay, provides the privacy and independence desired for multigenerational living or a quiet retreat. Beyond this core flexibility, the expansive layout features a chef's kitchen designed for culinary exploration, anchored by an island and a convenient morning kitchen. The great room serves as a central gathering point, flowing naturally from the kitchen. Your owners suite provides a ground-floor retreat. With 3,644 square feet, four bedrooms, and four-and-a-half baths, this single-story design also includes a three-car garage and a practical utility room.

May also be listed on the Mattamy Homes website

Information last verified by Jome: Today at 5:52 AM (December 6, 2025)

Plan highlights

Garage
Attached Garage
Walk-In Closet
Primary Bedroom Downstairs
Utility/Laundry Room
Dining Room
Family Room
Porch
Primary Bedroom On Main
Kitchen

Plan details

*Pricing and availability are subject to change.
Name:
Onyx
Property status:
Floor plan
Size:
3,644 sqft
Stories:
1
Beds:
4
Baths:
4
Half baths:
1
Garage spaces:
3

Plan features & finishes

Garage/Parking:
GarageAttached Garage
Interior Features:
Walk-In Closet
Laundry facilities:
Utility/Laundry Room
Property amenities:
Porch
Rooms:
Primary Bedroom On MainKitchenDining RoomFamily RoomOpen Concept FloorplanPrimary Bedroom Downstairs
Upgrade Options:
Extended GarageOutdoor KitchenExtra Half BathButler’s PantryStorageFireplaceExtended Patio

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Estimated value based on Jome data, T&C apply

RiverTown - Springs image

Community details

RiverTown - Springs at RiverTown

by Mattamy Homes, St. Johns, FL

from$694,990
  • 5 homes
  • 7 plans
  • 2,705 - 4,461 sqft

View RiverTown - Springs details

Want to know more about what's around here?

The Onyx floor plan is part of RiverTown - Springs, a new home community by Mattamy Homes, located in St. Johns, FL. Visit the RiverTown - Springs community page for full neighborhood insights, including nearby schools, shopping, walk & bike-scores, commuting, air quality & natural hazards.

Community information

Homes built from this plan

Available homes in RiverTown - Springs

Extra incentives may apply to these homes
Pricing and availability are subject to change.
  • New construction Single-Family house 468 Sir Barton Dr, St. Johns, FL 32259 plan Garnet - image

    Garnet

    $782,000

    • 4 bd
    • 4 ba
    • 3,022 sqft

    468 Sir Barton Dr, St. Johns, FL 32259

  • New construction Single-Family house 495 Sir Barton Dr, St. Johns, FL 32259 plan Ruby - image

    Ruby

    $1,027,684

    • 5 bd
    • 5 ba
    • 4,182 sqft

    495 Sir Barton Dr, St. Johns, FL 32259

  • New construction Single-Family house 482 Sir Barton Dr, St. Johns, FL 32259 plan Sapphire - image

    Sapphire

    $1,041,385

    • 5 bd
    • 5 ba
    • 4,375 sqft

    482 Sir Barton Dr, St. Johns, FL 32259

More floor plans in RiverTown - Springs

Garnet by Mattamy Homes - image

Garnet

$734,990+
  • 4 bd
  • 3.5 ba
  • 3,022 sqft
Topaz by Mattamy Homes - image

Topaz

$779,990+
  • 4 bd
  • 3.5 ba
  • 3,368 sqft
Ruby by Mattamy Homes - image

Ruby

$894,990+
  • 4 bd
  • 4 ba
  • 4,179 sqft
Sapphire by Mattamy Homes - image

Sapphire

$913,990+
  • 5 bd
  • 4.5 ba
  • 4,375 sqft
Jade by Mattamy Homes - image

Jade

$954,990+
  • 5 bd
  • 4.5 ba
  • 4,461 sqft
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Financials

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  8. 90 Lanier St, St. Johns, FL 32259