Duplex House Plans - Architectural Designs

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Multi-Family Homes

Duplex House Plans

Offering a unique blend of affordability, functionality, and modern living, duplex house plans are quickly becoming a popular choice for homeowners and investors alike. Whether you envision spacious side-by-side units or practical stacked layouts, we have the perfect duplex floor plan to match your vision and budget.

What are Duplex House Plans?

A duplex is a multi-family house plan divided into two separate living spaces. Each unit features its own private entrance, living area, backyard (in many cases), and even a garage, depending on the desig...

Plan image - 623049DJ:Traditional Duplex House Plan with Matching 3 Bed, 3 Bath Units - 1464 Sq Ft Each

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623049DJ

Plan Number

starting at

$1,998

2,928

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 51923HZ:Country Craftsman Duplex House Plan with 3-Bed, 2-Bath Units Under 1300 Square Feet

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51923HZ

Plan Number

starting at

$1,395

2,496

Sq. Ft.

6

Bed

4

Bath

1

Story

2

Cars

Tour

Plan image - 100305GHR:Modern Farmhouse Duplex House Plan with Matching 1046 Square Foot 3-Bed Units

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Exclusive

100305GHR

Plan Number

starting at

$1,845

2,092

Sq. Ft.

6

Bed

4

Bath

1

Story

Plan image - 100300GHR:Modern Duplex House Plan with 950 Square Foot Units with Roommate-Style Upstairs Layout

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Exclusive

100300GHR

Plan Number

starting at

$1,695

1,900

Sq. Ft.

4

Bed

4.5+

Bath

2

Story

Plan image - 62360DJ:Craftsman Multi-Family House Plan with 2 Units - 3 Beds and 1616 Sq Ft Each

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62360DJ

Plan Number

starting at

$1,998

3,232

Sq. Ft.

6

Bed

4

Bath

1

Story

4

Cars

Tour

Plan image - 51914HZ:Modest Country Duplex House Plan With Matching 2-Bed and 2-Bath Units Under 1000 Sq Ft

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51914HZ

Plan Number

starting at

$1,345

1,994

Sq. Ft.

4

Bed

4

Bath

1

Story

Tour

Plan image - 623204DJ:Modern Farmhouse Duplex with 3 Bed Units Just Over 1700 Square Feet Each

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623204DJ

Plan Number

starting at

$2,098

3,422

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 100303GHR:Duplex House Plan with Matching 1106 Square Foot 3-Bed Units

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100303GHR

Plan Number

starting at

$1,845

2,212

Sq. Ft.

6

Bed

4

Bath

1

Story

Tour

Plan image - 623179DJ:Modern Farmhouse Duplex House Plan with Matching 3-Bed Units Under 2200 Square Feet

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623179DJ

Plan Number

starting at

$2,198

4,354

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 100310GHR:One Story Transitional-Style Duplex with 2 Bed Units Under 900 Square Feet

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Exclusive

100310GHR

Plan Number

starting at

$1,695

1,777

Sq. Ft.

4

Bed

4

Bath

1

Story

Plan image - 85338MS:Exclusive New American Duplex with Open Layouts for the Narrow Lot

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Exclusive

85338MS

Plan Number

starting at

$1,885

2,694

Sq. Ft.

6

Bed

4

Bath

2

Story

Plan image - 666218RAF:Modern Duplex with Side-By-Side 3-Bed Units Under 2000 Square Feet

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666218RAF

Plan Number

starting at

$1,944

3,608

Sq. Ft.

6

Bed

4.5+

Bath

3

Story

4

Cars

Plan image - 100301GHR:Modern Duplex for Narrow Infill Lots with Asymmetrical 3-Bed Units

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100301GHR

Plan Number

starting at

$1,845

2,418

Sq. Ft.

6

Bed

4

Bath

2

Story

2

Cars

Plan image - 62658DJ:3 Bed Craftsman Narrow Lot Duplex House Plan

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62658DJ

Plan Number

starting at

$1,998

2,974

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 623147DJ:Modern Farmhouse Style Duplex with Matching 1,250 Square Foot Units

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623147DJ

Plan Number

starting at

$1,898

2,516

Sq. Ft.

4

Bed

4

Bath

1

Story

4

Cars

Plan image - 100302GHR:Modern Duplex House Plan with 1620 Square Foot 3-Bed Units

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Exclusive

100302GHR

Plan Number

starting at

$2,145

3,240

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

Plan image - 81816AB:Modern Duplex House Plan with Matching 1522 Square Feet 3 Bedroom 2 Bath Units

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81816AB

Plan Number

starting at

$1,900

3,044

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

Plan image - 444377GDN:Modern Farmhouse Duplex House Plan with Matching 1428 Square Foot Units with 2 Master Suites

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444377GDN

Plan Number

starting at

$2,425

2,856

Sq. Ft.

4

Bed

4.5+

Bath

1

Story

4

Cars

Plan image - 57337HA:Duplex with Matching 2 Bed Units - 768 Sq Ft Per Unit

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57337HA

Plan Number

starting at

$1,049

1,536

Sq. Ft.

4

Bed

2

Bath

1

Story

Tour

Plan image - 623190DJ:Modern Farmhouse Style Duplex House Plan with 1700 Square Foot 3-Bed Units

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623190DJ

Plan Number

starting at

$2,098

3,422

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 38006LB:Duplex House Plan for Your Narrow Lot - 919 Sq Ft 2 Bed Units

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38006LB

Plan Number

starting at

$1,295

1,838

Sq. Ft.

4

Bed

2.5+

Bath

2

Story

Tour

Plan image - 62610DJ:Modest Ranch Duplex House Plan

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62610DJ

Plan Number

starting at

$1,998

2,824

Sq. Ft.

6

Bed

4

Bath

1

Story

4

Cars

Plan image - 31579GF:Modern Two-Family Home Plan with Bedrooms Upstairs

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31579GF

Plan Number

starting at

$1,075

2,792

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 70740MK:Rustic Duplex House Plan with 2-Story Great Room with Sleeping Loft - 1292 Sq Ft 3-Bed Units

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70740MK

Plan Number

starting at

$1,350

2,584

Sq. Ft.

6

Bed

4

Bath

2

Story

2

Cars

1
2
3
4
5
...
17
18
19

Duplex House Plans FAQs

What is a duplex house plan?

A duplex house plan is a residential building design that consists of two separate living units within the same structure. Each unit typically has its own entrance, and the units are either stacked vertically or positioned side by side.

What are the key characteristics of duplex house plans?

Separate Entrances: Each unit in a duplex has its own entrance, providing privacy and independence to the residents.
Shared Wall: Duplex units share a common wall, which helps in optimizing land use and construction costs.
Mirror Image Design: Often, duplex units are designed to be mirror images of each other, maintaining symmetry in the overall structure.

What are the benefits of duplex house plans?

Cost-Efficiency: Duplexes can be more cost-effective than building two separate houses, making them an attractive option for homeowners and investors.
Rental Income: Homeowners can live in one unit and rent out the other, providing a source of rental income.
Shared Maintenance: Since the units are part of the same structure, maintenance costs are often shared between the occupants.

How did the duplex house style originate?

The duplex style has historical roots in European architecture, where townhouses and row houses often shared walls. In densely populated urban areas, duplexes became a practical solution to optimize living space while minimizing land use. As housing needs evolved, the duplex style expanded globally and adapted to different cultural and architectural preferences.

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Total Heated Area (Sq. Ft.)

Bedrooms

Bathrooms

Plan Type

Single-Family Homes

Stand-Alone Garages

Multi-Family Homes (duplexes, triplexes, and other multi-unit layouts)

452

Other (sheds, pool houses, offices)

Footprint

Width (feet)

Depth (feet)

Height (feet)

Floors

Styles

Barndominium

2

Modern Farmhouse

17

Craftsman

68

Country

62

New American

42

Scandinavian

2

Mid Century Modern

12

Cottage

8

Contemporary

52

Transitional

12

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A-Frame

Acadian

Adobe

Beach

4

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Cabin

2

Cape Cod

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Coastal

5

Coastal Contemporary

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3

European

16

Farmhouse

11

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2

French Country

6

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2

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2

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1

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1

Mediterranean

1

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40

Mountain

6

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Northwest

60

Prairie

13

Ranch

43

Rustic

8

Shingle

2

Southern

34

Southern Traditional

3

Southwest

Spanish

Traditional

178

Tudor

6

Tuscan

Vacation

7

Victorian

1

Number of Vehicles

1

12

2

148

3

11

4

162

5+

6

Garage Type

Attached

397

Detached

2

Carport

3

Driveunder

38

RV Garage

3

None

180

Garage Location

Front

287

Side

29

Rear

19

Courtyard

3

Bedroom and Bath Options

Bedrooms - Clustered

173

Bedrooms - Split

52

Master Suite - 1st Floor

264

Master Suite - 2nd Floor

194

Master Suite - Lower Level

4

Master Suite - Sitting Area

8

Two Master Suites

17

In-Law Suite

13

Jack & Jill Bath

26

Kitchen and Dining

Breakfast Nook

68

Two Kitchen Islands

Butler Walk-in Pantry

59

Butlery

Formal Dining

28

Laundry Location

Laundry Access from Master Suite

7

Laundry - Upstairs

93

Laundry - Lower Level

9

Laundry - Main Level

177

Laundry Chute

Additional Rooms

Bonus Room

29

Den

18

Flex Room

20

Game/Rec Room

10

Home Office

43

Home Theater

6

Keeping Room

1

Library/Study

17

Loft

31

Media Room

1

Mudroom

92

Playroom

1

Safe Room

Sport Court

Sunroom

5

Two Story Great Room

28

Wet Bar

6

Wine Room

Outdoor Features

Wrap Around Porch

9

Outdoor Fireplace

1

Outdoor Kitchen

Courtyard

3

Stacked Porches

1

Foundation

Basement

247

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

342

Daylight

58

Joist

Monolithic Slab

6

Pier

1

Piling

Post/Beam

1

Post Frame

Post/Pier

Raise Island

Slab

337

Stem Wall

4

Walkout

125

Special Features

Casita

Elevator

2

Handicapped Accessible

5

Multiple Stairs

2

Split Level

4

More Special Features

Exterior Walls

Block / CMU (main floor)

4

2x4

214

2x6

411

2x8

ICF

2x4 and 2x6

Log

Metal

2

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Exclusive

23

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1

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5

Interactive Tours

9

House Plan Videos

6

Photo Gallery

39

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2

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1

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1

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87

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1

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Home Office Studio

Large

206

Materials List

411

Metric

65

Multi-Generational

7

On Sale

Pool House

Post-Frame

Recently Sold

205

Shed

Timber Frame

USDA Approved

8

Lot Features

Narrow Lot

150

Front/Up Sloping

9

Rear Sloping

4

Side Sloping

1

Sloping Lot

28

Garage Features

Garage Features

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