Generate duplex unit floor plans for side-by-side or stacked configurations. Built for investors, builders, and house hackers. 3 variations in seconds.
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Duplexes are the gateway to real estate investing. By building two units under one roof, you cut per-unit construction costs by 15–25% compared to standalone homes. The shared wall, foundation, and roof make duplexes one of the most cost-efficient housing types to build.
House hacking — living in one unit while renting the other — is the most popular strategy for first-time investors. With FHA financing, you can put as little as 3.5% down on an owner-occupied duplex, letting rental income cover most of your mortgage.
For builders, duplexes offer higher revenue per lot than single-family homes. In markets with housing shortages, multi-family builds often receive expedited permitting and density bonuses. Many cities have relaxed zoning to allow duplexes in traditionally single-family zones.
A duplex floor plan shows two separate living units within a single building structure. Each unit has its own entrance, kitchen, bathrooms, and bedrooms. Duplexes can be side-by-side (sharing a center wall) or stacked (one unit per floor). They're one of the most popular multi-family investment property types.
Building a duplex typically costs $250,000–$500,000 depending on location, size, and finish level. Per unit, duplexes are 15–25% cheaper than building two separate homes because they share foundation, roofing, and one wall. This makes them excellent investment properties with strong ROI.
Duplexes are among the best real estate investments for new investors. You can live in one unit and rent the other (house hacking), qualifying for owner-occupied financing with lower down payments. Rental income from one unit often covers 60–80% of the total mortgage.
Side-by-side duplexes share a center wall with each unit getting its own yard space and ground-floor entry. Stacked duplexes place one unit on each floor, sharing a foundation footprint. Side-by-side works better on wider lots; stacked is ideal for narrow urban lots.
Floorpln generates individual unit floor plans that work perfectly for duplex planning. Generate a unit plan, then mirror it for a side-by-side configuration. Each unit gets its own room schedule, cost estimate, and PDF export.
Design each unit individually. Mirror for side-by-side. Stack for up-down.
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