The Mar-a-Lago security perimeter has become Palm Beach’s most quietly priced amenity. As Fortune reported in detail this weekend, the recurring road closures, motorcade staging, and federal protective footprint that surround the South Ocean Boulevard estate are no longer an inconvenience absorbed by neighbors — they are an asset class. Buyers in the blocks immediately adjacent to the perimeter are paying premiums for what amounts to a privately financed, federally enforced security cordon, and the pricing data on closed sales over the past twelve months bears the trade out.

The New Underwriting Math on the South End

Palm Beach’s South End — the residential corridor running from Mar-a-Lago south toward Sloan’s Curve — has historically traded at a measurable discount to the North End and the Estate Section. The Fortune piece confirms what listing agents on the island have been describing in private for the better part of two years: that discount is gone, and in several pockets it has reversed. Properties with sight lines onto the protective perimeter, or within the road-closure footprint, are now commanding pricing in line with comparable square-footage product north of Worth Avenue.

The math is simple. Buyers at the $30 million-and-up tier increasingly underwrite security as a hard line item. Private security details run six and seven figures annually. A federal protective presence — even one that is incidental to the buyer rather than commissioned for them — substitutes meaningfully for that recurring spend. The perimeter is, in effect, a free option on a service that buyers at this level were already paying for.

What’s Actually Trading

The broader Palm Beach trophy market continues to set the pace nationally. Average single-family home value on the island reached $9.8 million in 2026, with five-year appreciation at 118.2% and median single-family sale price at $12.9 million. The island now claims 58 resident billionaires, a concentration unmatched by any other ZIP code in the country. Inventory at the top end remains tight — buyers signed 26 contracts for luxury Palm Beach County properties between March 30 and April 5 alone.

The headline transactions of the past quarter set the floor. Worth Avenue’s Esplanade traded for $200 million, the most expensive single-property sale in the town’s history. The Gucci-leased building at 225 Worth Avenue cleared $43 million — $4,329 per square foot — confirming the corridor as institutional-grade trophy retail. South End residential pricing is being pulled along by both prints, with the security premium adding a third leg to the bid.

Old Money, New Math

What has changed is who is doing the math. The traditional Palm Beach buyer — multigenerational, philanthropy-driven, season-resident — is now sharing the market with a steadily larger cohort of finance principals, technology founders, and family-office clients who treat the island as a primary or co-primary residence. That cohort underwrites property the same way it underwrites portfolio positions: with explicit assumptions about insurance, security, liquidity and exit. The Mar-a-Lago perimeter shows up as a discrete value driver in those models.

For sellers along the South End — particularly those holding non-direct-oceanfront product that has historically traded at the Estate Section discount — the implication is direct. Pricing strategy needs to incorporate the security premium that adjacent and proximate properties have been quietly capturing. Listing brokers who do not surface the perimeter explicitly in marketing are leaving basis points on the table.

The Season Closes With the Polo Final

The U.S. Open Polo Championship final at the National Polo Center in Wellington remains on the calendar for Saturday, April 26 at 4:00 PM EDT — the formal close to the 2026 high-goal season. The event will be carried on ESPN platforms with Chris Fowler in the broadcast booth, beIN Sports internationally, and Star Sports in India. Wellington and Palm Beach end the season with the same data point in the spreadsheet: trophy demand on the island is structurally stronger than it was a year ago, and the buyers writing the largest checks are the ones who do the most spreadsheets.