485 W Matheson Drive is the kind of waterfront estate the Key Biscayne market simply does not produce twice. A 2.38-acre south-east-facing parcel with 862 linear feet of direct Biscayne Bay frontage, it sits at the southern tip of Tropical Isle Homes — the small enclave of bay-front parcels that anchors Key Biscayne's deepest waterfront stock. The legal description includes a tract of submerged land in Biscayne Bay, meaning the dock geometry, draft and orientation are controlled by the owner rather than by neighbors or county easements.
The existing residence is a three-level, ~11,528 SF home (~13,500 SF per owner, including covered terraces) built in 1981 of CBS construction with a poured-concrete roof. Twenty-four-foot ceilings, marble floors, walls of glass and the now-iconic original glass elevator all survive from the build. The house brings cultural weight — it served as the Winter White House for sitting administrations and later starred as Frank Lopez's residence in Scarface (1983) — but its real significance to a 2026 buyer is the land beneath it and the bay in front of it. Five bedrooms plus a convertible gym, seven full + two half baths, a free-form pool and a circular drive complete the existing footprint.
Tropical Isle Homes Resub is a small subdivision of bay-front single-family parcels at the southwest edge of Key Biscayne, between Crandon Park (Cape Florida Lighthouse) and the Village of Key Biscayne core. The neighborhood is gated by geography rather than by walls: Key Biscayne itself is an island connected to the mainland only by the Rickenbacker Causeway, and Tropical Isle sits behind two layers of single-entry residential streets. Bay-front lots in this pocket are tightly held; many haven't traded in two or three decades, and lot sizes above 1.5 acres are statistically a handful per cycle. The 2.38-acre parcel at 485 W Matheson is among the largest single-family bay-front lots on the island.
Direct south-east exposure (skyline + sunrise), no fixed-bridge restriction for large yachts, walking distance to Crandon Park & Cape Florida State Park, full-time Village police force, and a tax base ranked among Florida's highest per capita — meaning maintained streets, lighting, and seawalls. Florida no-state-income-tax positioning applies fully.
485 W Matheson Drive sits in a tier of South-Florida residential transactions essentially defined by one or two trades per cycle. There is no clean condo-style comp set; the right benchmarks are the three or four Miami trophy waterfront sales of the last decade, all of which traded on land + frontage rather than on the existing structure.
At ≈ $275,000 per linear foot of bay frontage, 485 W Matheson is priced below the Indian Creek waterfront benchmarks ($289 K – $714 K / LF) and in line with the Star Island trade. The aggregate price is the highest single-family ask in Key Biscayne history, but on a per-LF basis the asset is positioned at the floor of the Miami trophy waterfront band. The 1981 house is best modeled as zero-value — the trade clears on the land, the frontage, the submerged-land tract, and the cinematic / political provenance.
862 linear feet of single-owner bay frontage cannot be assembled in Key Biscayne today — there is no plat to subdivide and no adjacent stock to combine. New entrants pay for waterfront they can't manufacture, which compresses the spread between asking and trade on parcels of this size.
CBS-and-concrete construction from 1981 with marble + terrazzo + vinyl flooring will not satisfy a $200M+ buyer's specifications in 2026. Most likely outcomes: full teardown + redevelop (~25,000 SF compound, 18–30 months) or deep adaptive reuse preserving the glass elevator and Scarface envelope as branded features. Either path means the listing's real cost basis is land + provenance, not finished sqft.
Two distinct identities — sitting US President's winter residence and the on-screen home of Scarface's Frank Lopez — create a brand surface that no comparable Indian Creek or Star Island lot owns. Useful for future resale narrative, licensing (film, branded events), or as a magnet asset for a private foundation / family-office legacy strategy.
The legal description includes "a tract of submerged land lying in Biscayne Bay 6" — meaning the dock orientation, length, draft, and beam can be permitted by the owner without negotiating with adjacent neighbors. At this price tier, mega-yacht berth optionality is a non-trivial component of value (cf. the Star Island and Indian Creek trades).
At $237 M, this is not a yield asset. Standard cap-rate framing does not apply (a 3 % cap would require $7.1 M / yr net of taxes, insurance and maintenance, which the local single-family rental market cannot support). The thesis must be framed in capital preservation + redevelopment + provenance.
Acquire as Florida-domiciled UHNW residence. Hold horizon 10–15 yrs. Underwriting assumption: Miami trophy-waterfront land appreciates 4–6 % nominal / yr (in line with Indian Creek + Star Island trades 2015–2024). Annual carry: ~$717 K taxes + insurance ($300–500 K wind / flood / liability) + maintenance ($150 K) ≈ $1.2 M / yr, partially offset by the Florida no-state-income-tax positioning if used as primary residence.
Demolish 1981 structure (preserve glass elevator + key Scarface elements as branded artifacts), permit + build a ~22–25,000 SF modern compound. Construction cost at this tier: $1,200–1,800 / SF interior + dock works ≈ $50–80 M all-in over 24–36 months. Resale target: $325–400 M into the next-cycle Miami trophy buyer. Margin sensitive to entitlement velocity, hurricane-cycle insurance pricing, and rate environment at exit.
Lease to a single tenant (sovereign-wealth principal, Fortune-100 founder, film production) at $400–600 K / month (top-band single-family Key Biscayne) ≈ $5–7 M / yr gross. After taxes / insurance / maintenance, net ≈ $3–5 M / yr → ~1.5 % – 2.0 % net cap rate. Worth pursuing only as a bridge while underwriting Scenario B, not as a standalone thesis.
Pattern established by Griffin (Citadel → Indian Creek / Star Island) and others 2020–2024. State-income-tax savings on a 9-figure annual book repay the carry in 12–18 months. Trophy waterfront + private dock + low-density island = best in-class match.
Buyer seeking a US legal-residence asset with sovereign optionality, mega-yacht access, and a recognizable cultural identity. Provenance (Winter White House, Scarface) plays globally and supports the resale narrative even in non-English-speaking markets.
Underwriting Scenario B (teardown + rebuild). Targeted IRR 8–12 % over 36–60 months including the new-build margin. Edge cases: a single-family redeveloper, or a structured JV with a yacht-builder for an integrated berth + compound product (cf. Nobu / Aman branded residences playbook).
100-year horizon. Acquire under a Florida Land Trust or family LLC, preserve the existing architectural envelope, and use the property as a generational anchor (foundation HQ, sponsored cultural residencies, family compound). Cap rate is N/A; the asset is treated as land-banked equity in scarce-supply Miami waterfront.
BlueBay Brokers will coordinate a private showing under a signed NDA + proof-of-funds package. Pre-tour we'll prepare a parcel-level redevelopment feasibility memo (zoning, setbacks, submerged-land permitting, comparable yacht-berth precedents) so the visit is technical, not theatrical. Contact Steve directly to start.