Not Key West, and that matters
Stock Island sits at about mile marker 4 to 5, just across the bridge from Key West. It is unincorporated Monroe County, so the City of Key West's transient rental license system does not apply here. County rules do. Buyers who assume Key West rules, or assume Key West pricing logic, often get surprised.
Property types and the loans that fit
| Property | What to know |
|---|---|
| Single-family home | The simplest path. Conventional, FHA, VA or jumbo, depending on price and how you will use it. |
| Condo, including marina condos | Lenders review the whole building, not just the unit: reserves, insurance, owner-occupancy, rental programs and any litigation. Buildings that fail Fannie Mae or Freddie Mac review are "non-warrantable" and need specialty financing. See the non-warrantable condo guide. |
| Condotel or hotel-style unit | Usually non-warrantable. Specialty lenders only. See condotel financing. |
| Manufactured home on owned land | Can be financed when the home is permanently attached, titled and taxed as real estate, and meets HUD code. Fewer lenders, more paperwork. |
| Mixed-use or working waterfront | If part of the property is commercial, a residential mortgage may not fit. Commercial or portfolio loans may. Call before you offer. |
| Houseboat or liveaboard slip | A houseboat is not real estate, so a mortgage does not apply. A slip owned as real property is a separate, specialty conversation. |
Flood zones and insurance
Stock Island is mostly in FEMA's AE zone with VE along exposed shoreline. Flood insurance is required on federally backed loans in both, and condo buyers also need to know what the building's master flood policy covers.
As of October 2026 the National Flood Insurance Program (NFIP) is authorized through December 11, 2026, after a short-term extension Congress passed in September. When NFIP authorization lapses, as it did from October 1 to November 12, 2025, it cannot write new policies, and a closing that depends on a new NFIP policy can stall. Private flood insurance that meets lender requirements is the usual workaround, so on any purchase scheduled near that date, get a private flood quote as a backup.
Rental rules
Stock Island sits in unincorporated Monroe County, so county rules apply. Renting for less than 28 days takes an annual Monroe County Special Vacation Rental Permit, a licensed vacation rental manager, a fire and life safety inspection, and state lodging and tax registrations. The permit is only available in certain land use districts. In the IS (Improved Subdivision), IS-M and URM districts, vacation rentals are prohibited unless the property is in a gated community whose HOA controls rentals. A county permit does not pass to a new owner, so past Airbnb income on a listing proves nothing about what you can legally do after closing.
Loan options
- Conventional, FHA or VA up to $990,150 for one unit in Monroe County, on homes and warrantable condos.
- Non-warrantable condo and condotel loans through specialty lenders.
- Jumbo above $990,150.
- Investment, DSCR or commercial loans for rentals and mixed-use property, including no-ratio DSCR options when the rent will not fully cover the payment.
Financing is never guaranteed. Approval depends on you, the property and the lender.
Run the numbers on a specific address
Every figure that decides a Keys loan is tied to one parcel. These free tools get you a first read before you spend money on an appraisal.
Stock Island mortgage questions
Is Stock Island part of Key West?
No. Stock Island is unincorporated Monroe County, just across the bridge from the City of Key West. County rules for building, flood and vacation rentals apply, not the city's transient rental license system.
Can I get a mortgage on a Stock Island marina condo?
Often, but it depends on the building. Lenders review the condo association's reserves, insurance, owner-occupancy and rental rules. If the building fails Fannie Mae or Freddie Mac review, you need a non-warrantable condo loan from a specialty lender. Have the building screened before you pay for an appraisal.
Can I finance a manufactured home on Stock Island?
Yes, if the home is permanently attached to land you own, titled and taxed as real estate, and built to HUD code. Fewer lenders offer these loans, so start early.
Can I get a mortgage on a houseboat?
No. A houseboat is not real estate, so mortgage financing does not apply. Boat loans or specialty marine lenders are the usual route.
What is the 2026 conforming loan limit in the Florida Keys?
All of the Florida Keys are in Monroe County, where the 2026 conforming loan limit for a one-unit home is $990,150. Loan amounts at or below that can use conventional financing backed by Fannie Mae or Freddie Mac. Above it, the loan is a jumbo. The FHA limit in Monroe County is also $990,150 for one unit. VA has no loan limit for veterans with full entitlement.
Send me the listing before you offer
Stock Island property types vary more than anywhere else in the Keys. Send me the listing and I will tell you which loan type fits, or whether one does, before you commit.
Ask Eli about a Stock Island propertyNearby and related
Sources
- Florida Realtors: FHFA 2026 conforming loan limits
- NAHB: NFIP extended to December 11, 2026
- Monroe County Special Vacation Rental Program
- Key West transient rental rules (see our Keys rental guide)
- Citizens Property Insurance: flood coverage requirement
- Florida Statutes 689.302, seller flood disclosure
I live and work in the Lower Keys and finance Keys homes where the flood zone, the insurance and the rental rules decide the loan as often as the credit file does. Call or text (305) 424-9005.
Educational information only, checked against the sources above as of October 3, 2026. Flood maps, insurance rules, permit programs and rental regulations change and are applied parcel by parcel, so confirm current requirements with the county or city, FEMA, and your insurance agent before relying on them. This is not legal or insurance advice and not a commitment to lend. Financing is never guaranteed: approval depends on the borrower, the property and the lender, and all loans are subject to credit approval, underwriting and property eligibility. Eli Sanderlin, NMLS #1983384. Coast2Coast Mortgage, LLC, NMLS #376205. Equal Housing Lender.