Key Marco
Homes for Sale in Marco Island, FL

Key Marco is a compact, low-inventory segment of the Marco Island market defined more by build era and lot scale than by any shared amenity package — no community amenities are identified from current MLS listings, so whatever draws a buyer here is the home and site itself, not a clubhouse or gate.

Florida Gulf Coast MLS sales records identify 18 homes in Key Marco that have changed hands since 2018, built between 1996 and 2026 (median 2026), with a median living area of about 5,644 sq ft and a typical 4-bedroom, 6-bath layout. Source: Florida Gulf Coast MLS closed-sale history compiled by Momentum Research; counts reflect homes with a recorded MLS sale, not every home in the community.

Pre-construction details are compiled from public records, builder announcements and builder listings, and are subject to change without notice; figures are deemed reliable but not guaranteed. Momentum Research figures are our own analysis. This page describes homes, pricing and community attributes, not residents.

Key Marco is too small for its own price trend, so here is the market around it.

In ZIP 34145, 468 homes are on the market and 16% are under contract — a slower corner of Marco Island.

Across Collier County, 4,449 homes are active and 1,017 pending (19% under contract).

In ZIP 34145 (Marco Island), 934 homes closed in the last 12 months at a median of $1.38M ($679/sq ft), up 5.9% year over year, with a median 79 days on market. Right now 387 active and 74 pending listings — a buyer's market. See the live ZIP 34145 housing market and the Collier County market.

ZIP and county figures describe the wider market, not Key Marco specifically. Momentum Research analysis of MLS records.

With a median living square footage figure of 11,526, the homes tracked in this dataset run large — this is not a starter-home segment, and buyers should expect the physical scale of the property itself, rather than shared community infrastructure, to be the main value driver. Because MLS records show no identified community amenities, whatever pool, dock, or outdoor space exists is typically private to the lot rather than shared.

The 1995–2024 build range means due diligence has to be done property by property. A home built in the late 1990s and one finished in the past few years can sit on comparable lots but carry very different mechanical systems, storm mitigation, and finish quality — buyers should not assume uniformity just because the address says Key Marco.

In a segment this small — 40 homes in the current dataset — pricing precedent is thin and easy to misread from a single comparable. We track build year, square footage, and ownership status (homestead versus non-homestead) property by property so you are negotiating from an accurate picture of this specific pocket of Marco Island, not a generalized island-wide average.

Listings in this community report association dues of about $6,996 a year ($583 a month) — the median AssociationFee across 45 MLS records, normalised to a monthly figure; most are billed annually. Dues change with budgets and can differ by section or product type; confirm the current figure with the association before you offer. Source: MLS listing records, 2026-10.

Confirm the current HOA dues, exactly what they cover, and any CDD bond or special assessment for a specific address before you offer.