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Duplex House Plans – Modern Two-Unit Designs for Every Lifestyle

Discover Side-by-Side and Stacked Multi-Family Layouts Perfect for Rentals, Family Homes, or Investments

Find Your Dream house

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2-unit Craftsman duplex featuring 1,608 heated sq. ft. per unit

Stylish, Functional, and Affordable Designs for Dual Living

Looking for a design that combines space efficiency, affordability, and great style? Our expertly crafted two-unit homes are perfect for builders, developers, and homeowners who want to maximize land use and rental potential without sacrificing comfort. Whether you’re building for investment, extended family, or want a practical family house, our plans offer value, flexibility, and customization.

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Found 3,002 House Plans!

  • Front view of a Traditional Colonial home featuring yellow horizontal siding, dark shutters, and a symmetrical two-story facade with attached two-car garage

    9-1124 HOUSE PLAN -Traditional Colonial Home Plan – 4-Bed, 3-Bath, 2,750 SF – House plan details

    Original price was: $2,470.56.Current price is: $1,254.99.
  • Front elevation of a Traditional Colonial home featuring horizontal siding, brick foundation accents, and a symmetrical two-story design with black shutters and gable rooflines

    9-1121 HOUSE PLAN – Traditional Colonial Home Plan – 4-Bed, 3-Bath, 2,850 SF – House plan details

    Original price was: $2,070.56.Current price is: $1,134.99.
  • Front view of Modern Farmhouse with board and batten siding, stone accents, gable roofs, and classic black window trim

    9-1112 HOUSE PLAN – Modern Farmhouse Plan – 4-Bed, 3-Bath, 3,321 SF – House plan details

    Original price was: $2,870.56.Current price is: $1,454.99.
  • Front view of a Colonial Farmhouse with horizontal siding, covered porch, breezeway, and detached two-car garage under a clear blue sky

    8-2003 HOUSE PLAN – Colonial Farmhouse Plan – 3-Bed, 2-Bath, 2,150 SF – House plan details

    Original price was: $2,870.56.Current price is: $1,454.99.
  • Front elevation of a Traditional Colonial style home featuring red brick and horizontal siding, an inviting covered porch, and upper gable windows.

    8-1933 HOUSE PLAN – Traditional Colonial Home Plan – 3-Bed, 2.5-Bath, 2,150 SF – House plan details

    Original price was: $2,870.56.Current price is: $1,454.99.
  • Front view of a Traditional Suburban style townhome featuring stone veneer and horizontal siding with symmetrical Colonial-inspired detailing

    8-1930-8 TOWNHOUSE PLAN – 6-Unit Traditional Suburban Home Design – 3-Bed, 2.5-Bath Each, 2,100 SF Units – House plan details

    Original price was: $3,370.56.Current price is: $1,754.99.
  • Front elevation of a two-story Traditional Suburban townhome featuring a balanced blend of stone and horizontal siding with double garage and upper gable windows.

    8-1930-7 TOWNHOUSE PLAN – Traditional Suburban 3-Unit Home Plan – 3 Beds, 2.5 Baths, 1,950 SF – House plan details

    Original price was: $3,370.56.Current price is: $1,754.99.
  • Front view of a Traditional Townhouse featuring horizontal lap siding, brick accents, and a symmetrical multi-unit facade with clean suburban appeal

    8-1930-2 TOWNHOUSE PLAN – Traditional Townhouse Plan – 3-Bed, 2.5-Bath, 1,850 SF Each | 6-Unit Multi-Family Design – House plan details

    Original price was: $2,870.56.Current price is: $1,454.99.
  • Front elevation of a Traditional Colonial style home featuring light-toned horizontal siding, dark shutters, stone accents, and a symmetrical entry design.

    8-1554 HOUSE PLAN – Traditional Colonial Home Plan – 3-Bed, 3-Bath, 2,992 SF – House plan details

    Original price was: $2,470.56.Current price is: $1,254.99.
  • Front view of a Traditional Colonial style home featuring horizontal lap siding, stone foundation detailing, black shutters, and a symmetrical façade with a gable roof and dormer windows.

    8-1525 HOUSE PLAN – Traditional Colonial Home Plan – 4-Bed, 3-Bath, 2,850 SF – House plan details

    Original price was: $2,870.56.Current price is: $1,454.99.
  • Front view of a Traditional Colonial style home with red brick and horizontal siding, featuring symmetrical windows and a welcoming covered entryway.

    8-1524 HOUSE PLAN – Traditional Colonial Home Plan – 3-Bed, 2-Bath, 2,050 SF – House plan details

    Original price was: $2,070.56.Current price is: $1,134.99.
  • Front view of Colonial Traditional style house featuring horizontal siding, stone accents, and three-car garage with classic symmetry

    8-1522 HOUSE PLAN – Colonial Home Plan – 4-Bed, 3-Bath, 3,200 SF – House plan details

    Original price was: $2,070.56.Current price is: $1,134.99.
  • Front elevation of a Traditional Colonial style home featuring a full brick exterior, symmetrical façade, and gabled rooflines under a clear blue sky

    8-1397 HOUSE PLAN – Traditional Colonial Home Plan – 4-Bed, 3-Bath, 3,100 SF – House plan details

    Original price was: $2,870.56.Current price is: $1,459.99.
  • Front elevation of a Traditional Colonial style home featuring horizontal siding, stone accents, double gables, and a covered entry porch with symmetrical windows.

    8-1376 HOUSE PLAN – Traditional Home Plan – 3-Bed, 3-Bath, 1,935 SF – House plan details

    Original price was: $2,070.56.Current price is: $1,134.99.
  • Front view of a Traditional Ranch style home featuring gray horizontal lap siding, stone accents, and a two-car garage under a symmetrical gable roofline

    8-1278 HOUSE PLAN – Traditional Ranch Home Plan – 3-Bed, 2-Bath, 1,850 SF – House plan details

    Original price was: $2,070.56.Current price is: $1,134.99.

What Are Duplex House Plans?

A duplex is a single building divided into two separate dwelling units. These may be arranged side-by-side or stacked on top of each other. Each unit typically has its own entrance, living area, kitchen, bathrooms, and bedrooms. They are ideal for multi-generational living, rental income, or shared investments. Compared to building two single-family homes, they’re a more cost-effective option that often requires less land and infrastructure.

Why Choose a Duplex?

  • Maximized Investment Potential: Live in one unit and rent the other for steady income.
  • Flexible Living Arrangements: Perfect for multi-generational households or families who want privacy while staying close.
  • Cost Efficiency: Lower construction and land costs than two detached houses.
  • Ideal for Narrow or Urban Lots: Many narrow lot house plans adapt easily into duplex designs.
  • Customizable Features: Modify floor plans to suit your needs with our affordable CAD adjustments.

Design Styles for Every Neighborhood

Our two-unit layouts come in a range of architectural styles—from modern farmhouse and contemporary to traditional and European. Choose from designs with garages, open-concept living areas, decks, porches, and more. Many of our layouts allow units to share a common wall for cost savings while maintaining privacy.

Popular Layout Features

  • Open-plan kitchens and living rooms that maximize usable space
  • Split-bedroom designs for added privacy
  • Private garages or carports for each dwelling unit
  • Shared outdoor areas such as patios or gardens
  • Separate entrances for complete independence

All Plans Include:

  • Construction-ready CAD files and PDFs
  • Unlimited build license
  • Free foundation changes (slab, crawlspace, basement)
  • Custom modification options for kitchens, garages, entrances, and more
  • Structural engineering included
  • Full previews of all plan sheets before purchase

How Duplexes Compare to Other Multi-Family Options

Compared to triplex or townhouse designs, duplexes typically face fewer zoning challenges while still offering strong rental potential. They’re a smart middle ground for small-scale unit buildings in both urban and suburban areas.

Who Benefits Most from Duplex Homes?

  • Real estate investors seeking rental properties
  • Estate agents marketing high-demand dual living spaces
  • Families needing flexible arrangements
  • Retirees downsizing with rental income opportunities
  • First-time builders looking for cost-effective designs

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Start Designing Smarter

We design each plan with both form and function in mind—resulting in layouts that are as beautiful as they are buildable. Every plan includes detailed blueprints, engineering documentation, and free foundation changes. Whether you want units stacked on top or side-by-side, we have a design to suit your goals.

Need Custom Modifications?

Want to flip a layout, add a third story, or adjust the number of units? Our affordable modification services make it easy, with quick turnaround and lower costs than most competitors.

Looking for Building Advice?

Visit our Local Building Codes guide for region-specific tips, or check the National Association of Home Builders for zoning information relevant to multi-family homes.

Build Smarter with My Home Floor Plans

All our designs are post-2008, field-tested, and structurally engineered. Whether your duplex will be in the city or suburbs, we can help you create the perfect living space for your needs.

Browse hundreds of professionally designed duplex house plans today and start building smarter with My Home Floor Plans.

Ready to Build?

Explore our complete duplex collection with CAD support, engineering, and unlimited-build licensing included.

Frequently Asked Questions

What is a duplex house plan?

A duplex house plan is a single building with two separate living units—side-by-side or stacked on top—offering privacy and flexibility for multi-family or rental use.

Do duplex house plans include both units?

Yes. Each plan includes both units, with mirrored or unique layouts depending on the design, plus all necessary CAD and engineering documents.

Can I customize a duplex plan?

Absolutely. We offer free foundation changes and affordable customizations for layouts, garages, kitchens, and more.

Are duplexes more affordable than two separate houses?

Yes. Duplexes save money on land, materials, and infrastructure compared to building two detached homes.

Where can I find duplex plans for narrow lots?

Browse our narrow lot collection for designs that fit tight urban spaces.