Jupiter Island Real Estate: The Public and Private Record

What Jupiter Island Is

The Town of Jupiter Island is a municipality of its own, a long barrier island in Martin County between the Atlantic and the Intracoastal Waterway. It has no commercial street, and its plats have been fixed for decades. The county roll for August 2026 lists 512 single-family parcels, 508 of them with a house, and 80 vacant residential parcels.

The island's one institution is the Jupiter Island Club, founded in 1944 by Joseph and Permelia Reed, with golf, beach and dining under one roof. Membership is by invitation. Its terms belong to the club, so we publish none of them. The town incorporated in 1953, and our island history tells how the land stayed quiet.

One mailing quirk shapes every search. The island's houses carry Hobe Sound addresses and the zip code 33455, and a few southern listings carry Jupiter. The MLS files island houses under all three names, so a search on the town name alone misses part of the market. This page counts the island by its street grid, and the notes give the rule. Jupiter Inlet Colony, the small separate town at the island's southern tip, sits in Palm Beach County, and the island's condominiums have their own study.

The Recorded Market, Measured

We start the series in 2020, because earlier years are too thinly recorded to compare. It has two peaks. The count peaked in 2020 at 31 closings of three million dollars and above. The dollars peaked in 2021 at $341.1M, the year of the island's $55.1M MLS record. Volume fell to about half of that in 2022 and 2023, then to a little over a third in 2024. The year 2025 recorded 17 closings for $287M, and 2026 has recorded 19 closings for $229.6M through September.

Quarters show the pulse better than years. The second quarter of 2026 recorded 13 closings for $153.4M. Only one other quarter in the series reached that count, the second quarter of 2021, and its $196.1M remains the largest. Since July 1 the island has recorded one closing, 55 Links Road at $11.1M on August 26. One quiet quarter is too short to read as a direction.

Our July quarterly report counted fourteen sales for $156.2M in that second quarter. That count included one $2.8M closing below this page's three-million-dollar floor, and the notes reconcile the two.

Price band changes how a house sells. Across the 37 closings since October 2024, which total $525.9M, prices ran from $3.2M to $39M. The $6M to $12M band cleared a median 94.3 percent of last asking price in 78 days. The top band, four sales, cleared 82.9 percent. Three closings carry zero days on the market, so the day counts read short.

The gap between last asking price and closed price is widest at the top. The ten largest closings cleared a median 87.8 percent of last asking price, against 92.4 percent across all 37. Two of the ten closed near 70 percent of asking.

Our record book ranks the island's largest sales since 2016, and the Hobe Sound comparison measures the same segment across the bridge. How long sales at ten million dollars and up take from listing to closing is mapped in our sale timeline study.

The Sales No One Sees

The record above leaves out a second market. Per the Palm Beach Luxury Private-Sale Index, the Town of Jupiter Island has recorded 81 qualified sales of a million dollars and up since 2016 with no matching MLS closing. They total $589.1M, about a quarter of the dollars on the island side. The off-market study holds the method.

The island's record sale is one of them. The deed for 450 South Beach Road was recorded in August 2025 at $58M, with no MLS closing in any feed we hold. The parcel runs 5.9 acres from the ocean to the Intracoastal. The MLS record is $55.1M, set in April 2021 at 382 South Beach Road. Four of the twelve largest sales since 2016 closed privately.

A single house shows the gap. The buyer of 511 South Beach Road paid $26M on the MLS in May 2021, and the house sold again privately for $40M in February 2026.

The private share swings with the listing cycle. It ran 13 percent of dollars in 2021 and reached 48 percent in 2024, when 11 sales closed privately against ten on the MLS. It stood at 33 percent in 2026, per the same index.

The top of the market is where the layer thickens. Of 24 sales at $20M and up since 2020, six closed privately. Fourteen private sales have reached $10M or more, and every one closed in 2021 or later.

A buyer who reads only the listings sees the public part of this market. The desk checks the private ledger first, and it asks owners quietly for buyers who tell us what they want.

What Is for Sale Now

On October 6, 2026 the island had 12 active listings and one pending sale. The listing record names the town on ten of the twelve, and eight of those ask $10M or more. Two more sit under Jupiter and Hobe Sound names. Together the 12 ask $292.2M.

Half of them have been reduced. Six of the twelve ask less than their original price, led by 488 South Beach Road, down from $50M to $44.95M. Five are houses completed in 2023 or later or still under construction, against five of the 37 recorded closings.

The twelve listings stand against 21 closings in the last twelve months. At that pace the inventory is about seven months of sales. The pending sale, 55 North Beach Road at $7.9M, went under contract on July 29.

Listings ask a median of $3,345 per square foot, against $2,179 for the closings since October 2024. The listed island is priced above the recorded one, and the county supply study places that inventory beside the rest of the coast.

What It Costs to Hold

Holding a house here starts with how Florida assesses it. The August 2026 roll for the island's 508 houses carries a median just value of $7.65M and a median assessed value of $5.24M. Assessment caps hold values below market until a sale, and in total the houses are assessed at 69 percent of just value.

The gap differs by owner. Homesteaded houses are assessed at 59 percent of just value and houses without the exemption at 84 percent. A sale resets the cap, so a buyer's first assessment starts from the appraiser's just value and the seller's bill is a poor guide. Our homestead explainer covers the exemption, the caps and portability.

The town levies its own tax. For 2025-26 the Town of Jupiter Island set 2.8259 mills, and the Jupiter Island Beach Protection levy added 0.9593, per the Martin County Property Appraiser's comparison of taxes levied. County, school and other levies sit on top of those two.

Insurance is the other large line. The federal flood policy tops out at $250,000 on a building, so a house at island values carries most of its flood cover in the private market. Our Jupiter waterfront flood insurance guide covers premiums and process, and our flood zone guide covers the federal program and its clock.

Club membership is a separate decision with its own terms. We publish none of them, and the club answers questions directly.

Who Buys Here

Island buyers overwhelmingly pay cash. Per the Flexmls records, 123 of 131 closings at three million dollars and above from 2020 through June 2026 were cash, or 94 percent. The market also follows the winter. Of the 132 closings since 2020, 90 landed from January through June, the season mapped in our social season guide.

The roll shows who holds the houses now. Of the 508, 314 claim the Florida homestead exemption, so the island is a primary residence market as much as a second-home one. Owners with a Florida mailing address number 395, and New York leads the other states. Trusts hold title to 171 of the houses and companies to 77.

A mailing address is not a residence, so the table shows where owners receive mail. The Jupiter Island community page holds the neighborhood detail, and our buyer services start with a conversation.