Duplex plans - House plans - Apartment plans

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Duplex plans

A duplex house plan is a multi-family home that contains two separate living units built as a single structure.
The most common arrangement is two units side-by-side with each unit being a mirror-image of the other. However, a duplex layout can also be two units side-by-side that are identical to each other in the same orientation or stacked one above the other in a two-story design. We also offer duplex plans that have the living units one behind the other for situations such as narrow lots and/or corner lots. With one of the most extensive collections of affordable duplex house plans on the internet, you are sure to find a floor plan that suits your project.


1 Bedroom duplexes 2 Bedroom duplexes 3 Bedroom duplexes 1, 2 and 3 Bedroom Duplex combos 4 Bedroom duplexes
Triplex plans Multi-Family plans Fourplex plans

Best-selling floor plans

New designs

Some of our newest and most popular plans are listed below. Should you require something larger, view our apartment plans .

Use the links above to find a plan by the number of bedrooms per unit.

(Click the image or plan number for details)

Exterior view
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Plan number
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Description of units
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Duplex house plan with a garage per unit. J0408-14d

duplex plan with garage

Duplex floor plan w/ garage

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2 bedroom / 2 bath

Economical duplex plan. J0129-14d

Small duplex plan

Economical 1 bedroom duplex floor plan

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1 bedroom / 1 bath

Best seller!
best-selling duplex house plan. J891d

Also see: 4-plex J891-4 / Triplex J891T

Our most popular 2 bedroom layout.

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2 bedroom / 2 bath

J0222-13d-2, duplex house plan with garage

Single garage per unit

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2 bedroom / 2 bath

J0222-13d, duplex house plan with garage

Single garage per unit

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2 bedroom / 2 bath

Duplex plan, J0124-13d

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2 bedroom / 1 bath

Popular design!
J778d, popular duplex home plan

Efficient plan

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2 bedroom / 1 bath

J748-CP, Duplex plan with carport

Duplex with a carport per unit

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2 bedroom / 1 bath

J0418-11d, duplex house plan

Efficient duplex

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2 bedroom / 1.5 bath

Narrow lot duplex house plan, J1103-11d

Narrow lot duplex plan

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1 bedroom / 1 bath


More popular duplex designs

Exterior View
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Description of units
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J0802d, duplex house plan
Duplex plan J0802d

1 bedroom / 1 bath

duplex plan J0905d
Duplex plan J0905d
Interior entrance for both units

2 bedrooms / 2 bath

narrow duplex house plan. J0203-11d
Duplex plan J0203-11d
Narrow lot duplex plan

1 bedroom / 1 bath

townhouse duplex floor plan. J1124-10d
Duplex plan J1124-10d
Townhouse floor plan

2 bedrooms / 1.5 bath

J748d , popular duplex plan
Duplex plan J748d
Efficient plan - Great for small lots

2 bedrooms / 1 bath

J-1690d-B, narrow lot duplex house plan
Duplex plan J1690d-b
Narrow lot plan

2 bedrooms / 1 bath

Best-selling duplex plans and apartments

Should you need assistance with a design or if you need modifications, please feel free to request a plan change. We will be glad to look at any change requests you may have and work to achieve the floor plan you desire. Most modifications are done within 24 hours at no extra charge.

*More duplex plans and apartment plans coming soon!

Customize any design      Apartment floor plans

All of our house plans are based on common requests from builders, individuals and visitors to this site. If you do not see a floor plan that meets your needs, please send e-mail or request a specific layout. We will be glad to assist you with your plan search and guide you toward designs that would best suit your needs or specific situation.
Or, if you find a layout that you would like to modify, get information.

Copyright notice
*All designs and floor plans are the sole property of PlanSource, Inc. Use of any design without permission of PlanSource, Inc is a violation of federal copyright laws. Plans are licensed for construction of one structure only. If more than one is to be built, please contact our office for information on additional license fees. We thank you for your cooperation.