Buying a Short-Term Rental in Key Colony Beach, FL
Key Colony Beach sits physically inside Marathon's Middle Keys footprint, but it is its own separately incorporated municipality -- a small city with its own commission-and-administrator government, its own police department, and its own building department and code enforcement, distinct from both the City of Marathon and unincorporated Monroe County. That separateness is not a technicality: it is the single most important structural fact for anyone evaluating a vacation-rental purchase here. Marathon's own licensing system, its fee debates, and its Building Permit Allocation System have no jurisdiction inside Key Colony Beach's city limits, and neither does Monroe County's rulebook. This page covers what is genuinely Key Colony Beach-specific about buying a short-term rental here -- its own permitting channel, the honest limits of what could be confirmed about that channel, and the two real demand drivers behind its rental market -- without repeating Marathon's own vacation-rental content or the Florida Keys hub's chain-wide facts.
Key Colony Beach Licenses Vacation Rentals Through Its Own City Hall -- Not Marathon's System
Because Key Colony Beach is a separately incorporated city -- confirmed at the hub level alongside Key West, Marathon, Islamorada, and Layton as one of Monroe County's five incorporated municipalities, and one that was never absorbed into Marathon when Marathon incorporated in 1999 -- it has the same legal standing under Florida's statewide short-term-rental framework to run its own local registration and licensing rules on top of the state floor. The City of Key Colony Beach maintains its own dedicated Building Department and Code Enforcement function, with its own building-permit application and its own Citizenserve online permitting portal, separate from Marathon's business-license office and separate from Monroe County's countywide systems. Practically, that means a vacation-rental question about a Key Colony Beach address needs to go to the city's own building department and code enforcement office -- not to Marathon City Hall, and not to the county.
This page will not invent Key Colony Beach's specific vacation-rental license categories, fee amounts, any numeric license cap, occupancy-tax rate, or application steps -- none of those figures could be confirmed this research pass, and guessing at them would be worse than disclosing the gap. Go directly to the City of Key Colony Beach's own building-department page and its Citizenserve portal (keycolonybeach.net) for the current, address-specific answer on what licensing a given property needs, what it costs, and whether any zoning or occupancy restriction applies to it.
A Real, Unresolved Question: Does Key Colony Beach Run Its Own Building-Allocation System?
A separate, current-sounding story adds a wrinkle worth knowing about before you buy: local news has covered Key Colony Beach's commission weighing a transfer of the city's own building rights to Marathon, alongside separate coverage of the city finalizing a police union agreement. A headline like that suggests Key Colony Beach may hold and manage its own pool of transferable building-rights allocations, similar in spirit to Marathon's and Islamorada's own growth-control systems -- but whether Key Colony Beach in fact runs a formal, BPAS-style allocation program of its own, as opposed to a simpler building-department and code-enforcement function operating under the county's broader growth-management framework, was not confirmed this research pass. If your plan involves new construction, a teardown-rebuild, or converting a vacant lot into rental inventory here, ask the city's building department directly whether any building-rights allocation applies to the parcel and what the current status of that allocation pool is -- do not assume either way.
The city's own institutional capacity is also worth a quick check before relying on any timeline promises: Key Colony Beach's city hall went through a real, multi-year storm-damage-and-repair saga running from a 2021 public notice through years of documented commission debate and staff turnover, and the city separately received a 2025 federal reimbursement tied to Hurricane Irma. None of that is disqualifying for a buyer, but it is a reasonable reason to confirm current staffing and turnaround times at the building department directly rather than assuming a permit or license review will move quickly.
Demand Drivers: Marathon Next Door, Plus Key Colony Beach's Own Canal-Front Inventory
Key Colony Beach's rental demand rests in part on simple proximity: the island sits immediately adjacent to Marathon's own restaurants, attractions, and Middle Keys visitor infrastructure, so renters staying in Key Colony Beach are typically a short drive from everything Marathon itself offers -- without Key Colony Beach needing, or having, that scale of commercial tourism infrastructure inside its own tiny city limits. This page does not restate Marathon's own attractions content; the point here is simply that a Key Colony Beach rental competes on quiet, residential proximity to a larger visitor hub rather than on hosting attractions of its own.
The second, genuinely local demand driver is the housing stock itself. Multiple current Florida Keys real-estate sites consistently organize Key Colony Beach listings around canal-front and oceanfront condos and homes rather than interior, non-waterfront housing -- consistent with a small, largely engineered island where canal access is closer to the norm than the exception. That canal-heavy inventory is a real reason condo and small-home buyers look at Key Colony Beach specifically for vacation-rental potential. This page did not confirm a specific percentage of canal-front versus non-canal-front lots, a median price, a listing count, or any occupancy or average-daily-rate figure for the city -- no rental-performance platform data (AirDNA, Rabbu, AirROI, or similar) was gathered here. Treat the canal-front character as a qualitative reason to look closely at a specific listing, not as a substitute for pulling current rate and occupancy data yourself.
Taxes and HOA/Condo Rules Still Apply on Top of Whatever the City Requires
Regardless of Key Colony Beach's own city-level licensing requirements, the same statewide and county-level obligations that apply everywhere else in the Keys still layer on top: a Florida Department of Business and Professional Regulation (DBPR) transient public lodging license, Florida's 6% state sales tax on rental income, and Monroe County's Tourist Development Tax (bed tax) on stays under six months, collected through the Monroe County Tax Collector. This page did not independently confirm the exact current combined Monroe County bed tax rate, and it did not confirm whether Key Colony Beach layers any additional city-specific rental tax or fee beyond its own licensing requirement -- confirm both directly with the Monroe County Tax Collector and the City of Key Colony Beach's building department before building a rental pro forma.
Because so much of Key Colony Beach's inventory is condominium product, a building's own condo association declaration can independently restrict or ban short-term rentals entirely, regardless of what the city itself allows -- this research did not catalog any specific Key Colony Beach building's declaration language. Pull the specific property's governing documents before assuming rental potential from a listing description or a verbal assurance from a seller or agent.
What This Page Confirmed, What It Didn't, and What That Means for a Buyer
Confirmed: Key Colony Beach is its own separately incorporated municipality, distinct from Marathon and unincorporated Monroe County, with its own commission-administrator government, its own police department, and its own building department, code enforcement function, and Citizenserve permitting portal; a real, current-sounding local story has the city weighing a transfer of its own building rights to Marathon; the city's real estate is consistently organized around canal-front and oceanfront condos and homes; and the city sits immediately adjacent to Marathon's own visitor infrastructure.
Not resolved, and not something this page will invent: any specific vacation-rental license fee, cap, or occupancy-tax rate for Key Colony Beach; whether the city runs a formal BPAS-style building-allocation system of its own; the exact current combined Monroe County bed tax rate; the city's current population, median home price, or condo-versus-home listing split; and any occupancy, rate, or rental-income figures for the city. Before writing an offer with short-term rental income in the plan, get the specific property's current, legal vacation-rental license status and fee schedule confirmed in writing by the City of Key Colony Beach's building department (via its Citizenserve portal or directly), confirm the current bed tax rate with the Monroe County Tax Collector, pull any condo or HOA declaration that applies, and have a Florida real estate attorney experienced in Monroe County/Keys transactions, along with a CPA, review the numbers before you buy. Nothing on this page is legal, tax, or investment advice.
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Get a Free Agent Referral →Independent research. No ads. No sponsored listings. This page covers only Key Colony Beach-specific vacation-rental-investment content; chain-wide Florida Keys facts -- the five-municipality patchwork, county-wide ROGO/NROGO, and the point that STR rules vary by municipality -- are covered on this site's Florida Keys hub page and not repeated here, and Marathon's own licensing, fee-debate, BPAS, and attraction content is covered on Marathon's own page and not restated here. Data sourced from: Monroe County's own municipalities framework confirming Key Colony Beach as one of five incorporated Monroe County cities, not absorbed into Marathon's 1999 incorporation; the City of Key Colony Beach's own site (keycolonybeach.net), including its Building Department and Code Enforcement page and its dedicated Citizenserve permitting portal, as the authoritative source for its own licensing system; local news coverage (Keys Weekly, keysnews.com) of the city's commission-administrator government, a 2024-2025 city-administrator turnover, a real story on the city weighing a building-rights transfer to Marathon alongside finalizing a police union agreement, and a multi-year city-hall storm-damage-and-repair saga running from a 2021 public notice through years of follow-up coverage; a January 2025 FEMA press release confirming a federal reimbursement to Key Colony Beach tied to Hurricane Irma; and multiple current Florida Keys real-estate listing sites consistently framing Key Colony Beach inventory around canal-front and oceanfront condos and homes. Honest gaps disclosed rather than filled with invented figures: this research did not confirm any specific vacation-rental license fee, cap, or occupancy-tax rate for Key Colony Beach; whether the city runs a formal BPAS-style building-rights-allocation system as opposed to a simpler building-department function; the exact current combined Monroe County bed tax rate; the city's current population, median home price, or a specific canal-front-versus-interior lot split; and any occupancy, average-daily-rate, or rental-income figures for the city (no AirDNA, Rabbu, AirROI, or similar platform data was gathered). Confirm current vacation-rental licensing and fee rules directly with the City of Key Colony Beach's building department, current bed tax rates with the Monroe County Tax Collector, and consult a Florida real estate attorney experienced in Monroe County/Keys transactions, along with a CPA and a local property manager, before purchasing a property in Key Colony Beach for rental income. Nothing on this page is legal, tax, investment, or real estate advice.