317 Tropical Ave, Grassy Key, FL 33050
Property image
Property image
UNDER CONTRACT
NEW CONSTRUCTION

$1,100,000

  • 4 Beds
  • 3 Baths
  • 1,740 sqft

317 Tropical Ave, Grassy Key, FL 33050

Est. Mortgage $6,541/mo*
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We estimate this home will sell faster than 92% nearby.

Home Highlights

Single-Family Home
Built in 2026
$632/sqft
Attached Garage

Local Information

  • Map ViewExplore the area around 317 Tropical Ave.
  • Schools1 Preschool School1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

About this House

Currently in Marathon, Duck Key & Key Colony there is no other New Construction Home available below $1.1M besides this Brand New Under Construction 4 Bed, 3 Bath, 1786 sqft living Concrete Above Flood Home, built by the local well-respected Design Center. It also happens to be located on a Corner Lot that backups to non-buildable protected land offering more privacy in the Grassy Key neighborhood, which has quickly become a highly desired area for many locals. It's a great family neighborhood with a community waterfront Sunset park and only a mile from a boat ramp. This home features poured solid concrete 16x16 columns plus an Energy Efficient Seamless Metal Roof, Hurricane Impact Windows & Doors, Spray Foam Insulation along with a High Efficiency 4 Ton A/C System, & even an Electrical Sub Panel Box prewired for a generator hook up. Pre-Cast Concrete Floors allowing for no center columns, which maximizes usable space in the 2 car garage. Step inside & find Maintenance Free Wide Plank Luxury Vinyl Flooring thru out the home, 8FT High Interior Doors, 9'6'' Ceilings, 5 ¼'' Baseboards, LED Recess Lighting, Modern Fans in each Bedroom & the Living Room, an Open Kitchen with Shaker Soft Close Wood Cabinets with Crown Molding & Hardware including 42'' Uppers, Quartz Countertops including a Large 1 level island, a Tile or Quartz Backsplash, Pendant Lighting, a Full Stainless Steel Appliance Package & Modern Single Sink & Faucet. All 3 bathrooms feature Designer Tiled Floors, Custom Tiled Showers including LED underlighting and lit shower nooks with the Primary & 1 Guest Bath having Frameless Glass Enclosures & the 2nd Guest having a Tub/Shower Combo. They all have Wood Vanities with Quartz Counters, Modern Vanity Lighting & Mirrors, Modern Faucets & Toilets. Home comes with a 1-year Builders Warranty and can be offered Furnished by a local interior designer for an additional cost making it Vacation Rental Ready. ETA for completion is Dec 2026.
Last check for updates: about 4 hours ago
Listing courtesy of Kenny L. Matlock, (305) 849-5582
No Nonsense Real Estate Branch Office
Chris Cioffi, (239) 410-5099
No Nonsense Real Estate Branch Office
Source: FLKMLS, MLS#620206
Also Listed on FLKMLS.
We estimate this home will sell faster than 92% nearby.

Home Details for 317 Tropical Ave

Interior Features

Beds & Baths
Number of Bedrooms: 4Number of Bathrooms: 3Number of Bathrooms (full): 3
Dimensions and Layout
Living Area: 1740 Square Feet
Appliances & Utilities
Appliances: Washer, Dryer, Dishwasher, Refrigerator, Range, Oven, Microwave, DisposalDishwasherDisposalDryerMicrowaveRefrigeratorWasher
Heating & Cooling
Heating: Has Heating Unspecified TypeHas CoolingAir Conditioning: Central Air,Ceiling Fans(s)Has HeatingHeating Fuel: Has Heating Unspecified Type
Windows, Doors, Floors & Walls
Flooring: Vinyl
Levels, Entrance, & Accessibility
Floors: Vinyl
View
No View

Exterior Features

Exterior Home Features
Patio / Porch: Open Porch/BalconyNo Private Pool
Parking & Garage
Has a GarageHas an Attached GarageParking: Attached
Frontage
Not on Waterfront

Days on Market

Days on Market: 93

Property Information

Year Built
Year Built: 2026
Property Type / Style
Property Type: ResidentialProperty Subtype: Single Family Residence
Building
Building: Medium - 5Ft - 9FtConstruction Materials: CBS, Concrete, StuccoIs a New Construction
Property Information
Condition: New ConstructionParcel Number: 00373010000000

Price & Status

Price
List Price: $1,100,000Price Per Sqft: $632

Active Status

MLS Status: Contingent/Show

Location

Direction & Address
City: MarathonCommunity: Crains Sub (58.0)

Agent Information

Listing Agent
Listing ID: 620206

Building

Building Area
Building Area: 1740 Square Feet

Community

Community Features: Other

HOA

HOA Fee Includes: NoneNo HOAHOA Fee: No HOA Fee

Lot Information

Lot Area: 7405.2 sqft

Offer

Contingencies: Contingent/ShowListing Terms: Cash, Conventional, FHA

Miscellaneous

Mls Number: 620206Zillow Contingency Status: Under Contract

Additional Information

Other

Around this home

What Locals Say about Marathon

At least 61 Trulia users voted on each feature.

  • 83 % Say car is needed

  • 79 % Say people would walk alone at night

  • 76 % Say parking is easy

  • 72 % Say it's quiet

  • 70 % Say it's dog friendly

  • 70 % Say yards are well-kept

  • 68 % Say there's holiday spirit

  • 61 % Say it's walkable to restaurants

  • 53 % Say there's wildlife

  • 53 % Say they plan to stay for at least 5 years

  • 51 % Say there are community events

  • 49 % Say kids play outside

  • 45 % Say neighbors are friendly

  • 37 % Say it's walkable to grocery stores

  • 36 % Say there are sidewalks

  • 29 % Say streets are well-lit

Sourced by Trulia users. Learn more about our methodology.
  • 4yrv5tc4qr
    "Seafood festival, theater, music festival, turtle releases, homecoming parade, 4th of July fireworks on the beach"
    1
    Flag
  • Ingridfox
    "people love walking dogs on the beach and dog dog park at Sombrero Beach. A lot of restaurants are dog friendly. This is a great place for dog owners. "
    1
    Flag
  • C E.
    "There is no place for kids to hang out really except for the skate park. There are no malls, no skating rinks, no places for kids to meet safely. "
    1
    Flag
  • Jan M.
    "We have basic public transportation. I’d take a taxi anywhere in town. .............................,,"
    0
    Flag
  • Erin F.
    "There’s plenty of grass, sidewalks and quiet roads to walk along.. plus the public beach is always a dogs favorite adventure.. just pick up after your dog!"
    2
    Flag
  • Thurmankolb
    "Yes! Dog park just down the street. Lots of neighbors know each other by our dogs. Great vets n Marathon and good groomer."
    6
    Flag
  • Thurmankolb
    "Lots of community events and activities. Fishing tournaments, seafood festival, school carnivals, etc... "
    2
    Flag
  • Jamie B.
    "Everyone gets together for the kids at Halloween. We have a community park with special events planned for the kids and the beach is the sight for a special 4th of July. "
    0
    Flag
  • Abiezer31
    "Of course ,the neighbors the owner and dog are very nice I’m very proud living in my house.and this neighborhood "
    3
    Flag
  • Darren S.
    "I live off the beaten path across the street from a golf course. It's very quiet and tranquil. throb marinas surrounding the property and can walk to All shops and stores."
    0
    Flag
  • Cyndiepalmer
    "We are a friendly neighborhood. You walk your street and say Hi anytime. It is a safe street to live "
    0
    Flag
  • Ksperkinson
    "Safe clean near ocean good police pet friendly hospital is coming along in the construction have contract here at hospital looking forward to finding a good place for 3 months"
    0
    Flag
  • Stephanie M.
    "A lot of kids and cars. A fire station that is noisey but nice. Lizards everywhere. There is one hotel on this small island. There are A lot of Vacation homes here and crab catchers. When it rains you can't see the road."
    0
    Flag
  • Lb2071
    "water front community , is a small island called Flamingo Island. We have a 9 hole golf course and just 5 minutes from Publix and Kmart. Sombrero beach is right at the outset of the canals on the Atlantic ocean and the people are very loving and friendly."
    0
    Flag
  • Gonzalez8834
    "Marathon is a great place to life and have a family, very safe, quiet and full of great people. ......"
    0
    Flag
  • Tom A. C. M.
    "I live here (14 years) and love the area. Close accessibility to shopping, schools, churches, golf, beach, walking, biking. "
    0
    Flag
  • Anne K.
    "Lived here for many years and is one of the best places to live in Marathon. Conveniently located near schools, parks, shopping and beach just minutes away."
    0
    Flag
  • Debra G.
    "Only 8 miles from Marathon. Away from the winter traffic, airport noise. Crystal clean, flow through canals. Great place to vacation and a great place to live. "
    0
    Flag

Market trends in Marathon

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$774K
$51.67KMoM
Sale-to-List Price
—
Price per sq ft
$630
$2MoM
Available listings
260
8MoM

Home Value

Trulia Estimate
$1.07M
Since last month
Decreased$3K (-0.2%)
Since last year
Decreased$900 (-0.1%)
Since last sale
Increased$870K (+434.8%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value decreased by 0% in the last 10 years
MonthEstimated value
2026
August 2026$1.07M
August 2026$1.07M
July 2026$1.07M
June 2026$1.07M

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
347 Guava Ave, Grassy Key, FL
0.32
Single-Family Home
$390,000
12/30/25
3
1
1,008
254 Orange Ave, Grassy Key, FL
0.23
Single-Family Home
$525,000
12/17/25
3
1
912
57485 Gibson St, Grassy Key, FL
0.41
Single-Family Home
$550,000
06/17/26
3
2
1,056
370 Cocoanut Ave, Grassy Key, FL
0.35
Single-Family Home
$500,000
10/29/25
2
2
864
58121 Morton St, Grassy Key, FL
0.24
Single-Family Home
$2,700,000
05/29/26
4
2.5
1,464
57453 Goodley St, Grassy Key, FL
0.46
Single-Family Home
$580,000
05/20/26
3
2
1,147
58345 Morton St, Grassy Key, FL
0.46
Single-Family Home
$1,700,000
09/01/26
3
3
1,896
57538 Bailey St, Grassy Key, FL
0.38
Single-Family Home
$440,000
12/01/25
2
1
874
58618 Overseas Hwy, Grassy Key, FL
0.79
Single-Family Home
$2,200,000
12/17/25
4
4.5
2,433

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
360 Tropical Ave, Grassy Key, FL 33050
0.06
$598,500
2
2
960
Off Market
349 Avocado Ave, Grassy Key, FL 33050
0.07
$576,400
2
2
864
Off Market
302 Lemon Ave, Grassy Key, FL 33050
0.09
$625,300
2
2
864
Off Market
Lemon Ave #39-lot 13, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #39-lot 14, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #39-lot 15, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #39-lot 16, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #38-lot 11, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #38-lot 16, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #38-lot 14, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #38-lot 13, Marathon, FL 33050
0.09
-
-
-
-
Off Market
Lemon Ave #38-lot 12, Marathon, FL 33050
0.09
-
-
-
-
Off Market

Price and Tax history

DateEventPrice
Jun 19, 2026
Source: FLKMLS #620206
Contingent
$1,100,000
Jun 19, 2026
Source: Key West AOR #620206
PriceChange
$1,100,000
Price increased by 10%
Jun 8, 2026
Source: FLKMLS #620206
Listed For Sale
$999,997
Nov 18, 2025
Source: FLKMLS #614909
Sold
$200,000
Nov 14, 2025
Source: FLKMLS #614909
Pending
$275,000

LGBTQ Local Legal Protections

Kenny L. Matlock, No Nonsense Real Estate Branch Office
Agent Phone: (305) 849-5582
MLS Internet Data Exchange (IDX) information is provided exclusively 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, and that the data is deemed reliable but is not guaranteed accurate by the Florida Keys MLS.

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Frequently asked questions about 317 Tropical Ave

  • What is the estimated monthly payment for 317 Tropical Ave?
    Based on a $1,100,000 list price with 20% down at today's rates, the estimated monthly payment for 317 Tropical Ave in Grassy Key, FL is approximately $6,642 (about $5,815 principal & interest, $752 property taxes, and $75 homeowner's insurance). This is an estimate. Actual payment depends on your loan terms.
  • How does the list price for 317 Tropical Ave compare to homes in Grassy Key?
    317 Tropical Ave in Grassy Key, FL is listed at $1,100,000, about 42% above the $774K median sale price in Grassy Key.
  • What do residents say about Grassy Key?
    Residents describe Grassy Key, FL as easy to park in, quiet, and dog-friendly. Most residents say you need a car. See homes for sale in Grassy Key, FL.
  • What are the closest schools to 317 Tropical Ave?
    The closest schools to 317 Tropical Ave in Grassy Key, FL are Marathon School (Middle/High, rated 5/10), Stanley Switlik Elementary School (Pre-K, rated 5/10).
  • Does 317 Tropical Ave have air conditioning?
    Yes, 317 Tropical Ave in Grassy Key, FL has air conditioning.
  • Does 317 Tropical Ave have laundry facilities?
    Yes, 317 Tropical Ave in Grassy Key, FL has in-unit laundry.
317 Tropical Ave, Grassy Key, FL 33050 is a 4 bedroom, 3 bathroom, 1,740 sqft single-family home built in 2026. This property is currently available for sale and was listed by FLKMLS on Jun 8, 2026. The MLS # for this home is MLS# 620206.