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. You, acting as landlord, have 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 look for another way to sell.

With Cash Flow Deals, you choose between the Fast Cash Offer, where we buy your duplex as-is and close, and the Premium Cash Offer, where a pre-approved FHA or conventional buyer we already have, ready to go, pays more and buys directly from you. On Premium, your home may be listed through Silver Door Realty, a licensed Florida brokerage, with a licensed agent and scheduled showings. Your buyer signs a new contract directly with you, title transfers straight from you to that buyer, and their lender funds the purchase. We are paid as a separate line item on the closing statement.

We cover repair costs, and we figure out a way, so nothing comes out of your pocket. With Premium, only what your buyer's lender requires gets fixed; we arrange for those costs to be covered up front and settled from the sale proceeds, from our share. With Fast Cash, we buy as-is, with no repairs for you to make. For either offer, the number is agreed before any work starts, and it changes only if you agree. The one exception: if something structural surfaces that was not visible or disclosed before we signed — foundation issues, hidden moisture, old wiring, cast-iron drain failure — we re-cost it and bring the number back to you. You decide. You can walk away. We disclose what we know at offer time so this almost never happens. If your Premium buyer's loan falls through, that is our problem, not yours, and you can still take the Fast Cash Offer at its own number instead of the Premium Cash Offer.

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

1. Cash Flow Deals reviews your duplex's condition, lease status, and tenant situation, then sends back written numbers for your Fast Cash Offer and Premium Cash Offer within 24 hours.

2. You compare both offers 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. You choose which offer fits, with no obligation to move forward.

3. If you accept, Cash Flow Deals coordinates your chosen sale, with the existing closing window of 45 days or less, on a date you help pick. On Fast Cash, we buy and close; on Premium, your buyer purchases directly from you. You do not need to vacate or re-lease either unit just to start, and you do not fund repairs up front. Any Premium repairs are limited to your buyer's lender requirements, and existing tenant leases and notice requirements still apply.