What Is a Duplex? A Florida Owner's Guide to Definition, Financing, and Selling

What Is a Duplex, Exactly?

A duplex is one building, two separate homes. It sits on one legal parcel with one deed, and each unit gets its own entrance, kitchen, bathroom, and utility meters. The two units either sit side-by-side sharing a wall, or stack on top of each other sharing a floor and ceiling. That's different from a townhouse: three or more homes built in a row, but each one sits on its own separate lot with its own deed. It's different from a condo too. A condo owner holds title only to the inside of one unit, while the building's exterior, roof, and land are owned jointly with the other unit owners. A duplex owner holds the entire building and lot under one title, period. Triplexes (three units) and fourplexes (four units) fall into the same 2-4-unit lending category as a duplex, but the down-payment math changes: conventional loans typically require 15% down on a duplex, versus 25% down on a triplex or fourplex, because lenders treat the third and fourth units as more risk. In Florida, a duplex on one deed gets taxed and insured as a single property, even though it functions as two homes. That's the detail that trips up sellers who assume selling a duplex works exactly like selling two condos.

How Duplex Financing Actually Works — And Why It Matters When You Sell

Duplex financing terms hinge on one thing: is the buyer moving in, or renting the whole building out? A buyer using an FHA loan to occupy one unit as a primary residence can put down as little as 3.5% with a credit score of 580 or higher, or 10% with a score between 500 and 579. That buyer must move into the unit within 60 days of closing and stay at least 12 months. FHA's 2026 loan limit for a 2-unit property is $1,032,650, and 2-unit FHA loans skip the self-sufficiency test that 3- and 4-unit purchases have to pass. A buyer using a conventional Fannie Mae loan to occupy one unit needs a minimum 15% down. Hit 20% down and private mortgage insurance goes away. Eligible veterans and active-duty buyers can use a VA loan with 0% down on a 2-unit property they'll occupy, plus a 2.15% funding fee, waived for buyers with a service-connected disability. Want to count rental income from the unit you're not living in? Fannie Mae only credits 75% of that unit's projected market rent toward qualifying. The 25% haircut covers vacancy and repair risk. And if a tenant already lives in the second unit when the duplex goes up for sale, Florida Statute 83.53 requires the landlord give that tenant at least 24 hours' written notice before showing the unit to a buyer. The tenant can't unreasonably refuse that access. That's the rule that catches Florida duplex sellers off guard when they assume they can schedule same-day showings the way a vacant single-family seller can.

What a Duplex Really Costs to Own in Florida — And How to Sell One

Owning a Florida duplex means paying for two of almost everything: two kitchens, two sets of major appliances, often two water heaters and two HVAC systems, and in many cases two separate insurance considerations, even though the whole building sits under one policy. Florida multifamily insurance costs have climbed sharply industry-wide over the past few years. Lenders typically require 3-6 months of PITI (principal, interest, taxes, insurance) held in reserve before approving a loan on a 2-4 unit property, on top of the down payment itself. A duplex also draws a narrower resale buyer pool than a single-family home: the buyer has to want both the rental-income angle and the shared-wall living arrangement. That's part of why duplexes can sit on the market longer than comparable single-family listings. If a tenant occupies one side, Florida Statute 83.53 still applies at sale time. The seller, acting as landlord, has to give at least 24 hours' notice before each buyer showing. A tenant with an active lease doesn't have to move out just because the building changes ownership: the lease and any security deposit transfer to the new owner. Dual maintenance costs, tenant notice requirements, and a smaller buyer pool: that's exactly why some Florida duplex owners skip a traditional listing altogether.

Cash Flow Deals is a Florida real estate investor that locks in a net price for a seller's house before repairs are scoped, using a novation-based, flat-fee process arranged through its licensed FL brokerage partner, Silver Door Realty — not a traditional listing, and not a brokerage itself.

Here's how the Cash Flow Deals process works on a Florida duplex, whether one unit is vacant, owner-occupied, or rented out right now:

1. Cash Flow Deals reviews the duplex's condition, lease status, and tenant situation, then sends back a written net price within 24 hours.

2. The seller compares that number against what a traditional listing would likely net after agent commissions, dual-unit repairs, and the extra weeks a duplex buyer's FHA or VA underwriting can add. No obligation to move forward.

3. If the seller accepts, Cash Flow Deals coordinates the novated contract through Silver Door Realty and closes in as little as 10 business days. Neither unit needs to be vacated, re-leased, or repaired first.