Duplex House Plans - Architectural Designs

Menu

Favorites

All Plans

Cart

Help

554 plans

Trending

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 - 52355WM:Traditional Duplex House Plan with 3 Bed Units - 1567 Sq Ft Each

Hide

52355WM

Plan Number

starting at

$1,095

3,134

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

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

Hide

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

Hide

51923HZ

Plan Number

starting at

$1,395

2,496

Sq. Ft.

6

Bed

4

Bath

1

Story

2

Cars

Plan image - 100324GHR:New American Duplex House Plan with 3 Bed 2 Bath Units - 1143 Sq Ft

Hide

Exclusive

100324GHR

Plan Number

starting at

$1,845

2,286

Sq. Ft.

6

Bed

4

Bath

1

Story

Plan image - 135281GRA:Two-Story Contemporary Duplex House Plan with Matching 3-Bedroom Units - 1565 Sq Ft Each

Hide

135281GRA

Plan Number

starting at

$1,150

3,130

Sq. Ft.

6

Bed

5

Bath

2

Story

2

Cars

Plan image - 48628FM:Two-Story Duplex Home Plan with 3 Beds and Great Room - 1397 Sq Ft Per Unit

Hide

Exclusive

48628FM

Plan Number

starting at

$1,485

2,794

Sq. Ft.

6

Bed

4

Bath

2

Story

Tour

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

Hide

Exclusive

100305GHR

Plan Number

starting at

$1,845

2,092

Sq. Ft.

6

Bed

4

Bath

1

Story

Plan image - 420163WNT:2-Bed Ranch Duplex with L-Shape Kitchen - 752 Per Unit

Hide

Exclusive

420163WNT

Plan Number

starting at

$1,745

1,504

Sq. Ft.

4

Bed

2

Bath

1

Story

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

Hide

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

Hide

51914HZ

Plan Number

starting at

$1,345

1,994

Sq. Ft.

4

Bed

4

Bath

1

Story

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

Hide

Exclusive

100300GHR

Plan Number

starting at

$1,695

1,900

Sq. Ft.

4

Bed

4.5+

Bath

2

Story

Tour

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

Hide

623204DJ

Plan Number

starting at

$2,098

3,422

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 51959HZ:Traditional-Style Duplex House Plan with 2 Bed 2 Bath Units - 1098 Sq Ft Each

Hide

51959HZ

Plan Number

starting at

$1,395

2,196

Sq. Ft.

4

Bed

4

Bath

1

Story

2

Cars

Plan image - 100327GHR:New American-Style Traditional Duplex with Matching 3-Bed 1300 Sq Ft Units

Hide

Exclusive

100327GHR

Plan Number

starting at

$1,995

2,694

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 52375WM:One-Story Duplex House Plan with 1-Bed Units - 395 Sq Ft Per Unit

Hide

52375WM

Plan Number

starting at

$1,025

790

Sq. Ft.

2

Bed

2

Bath

1

Story

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

Hide

Exclusive

100303GHR

Plan Number

starting at

$1,845

2,212

Sq. Ft.

6

Bed

4

Bath

1

Story

Plan image - 51969HZ:Modern Farmhouse Style Townhouse Duplex Plan with 3-Bedroom Units

Hide

51969HZ

Plan Number

starting at

$1,595

3,141

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Tour

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

Hide

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

Hide

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

Hide

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

Hide

666218RAF

Plan Number

starting at

$1,944

3,608

Sq. Ft.

6

Bed

4.5+

Bath

3

Story

4

Cars

Plan image - 52380WM:Traditional Duplex House Plan with 3 Bed Units - 1460 Sq Ft Each

Hide

52380WM

Plan Number

starting at

$1,095

2,920

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

Plan image - 420145WNT:Country Ranch Duplex Home Plan with 1-Bed Units - 612 Sq Ft Each

Hide

Exclusive

420145WNT

Plan Number

starting at

$1,745

1,224

Sq. Ft.

2

Bed

2

Bath

1

Story

Plan image - 52367WM:Two-Story Traditional Duplex with Home Office and Loft - 1615 Sq Ft Per Unit

Hide

52367WM

Plan Number

starting at

$1,025

3,230

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

2

Cars

1
2
3
4
5
...
22
23
24

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.

Filter

Clear All

Search for a keyword

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)

554

Other (sheds, pool houses, offices)

Footprint

Width (feet)

Depth (feet)

Height (feet)

Floors

Styles

Barndominium

2

Modern Farmhouse

26

Craftsman

78

Country

85

New American

69

Scandinavian

5

Mid Century Modern

21

Cottage

14

Contemporary

89

Transitional

18

More Styles

A-Frame

Acadian

Adobe

Beach

4

Bungalow

Cabin

2

Cape Cod

Carriage

Coastal

5

Coastal Contemporary

1

Colonial

3

European

21

Farmhouse

13

Florida

5

French Country

6

Georgian

Hill Country

3

Lake House

2

Log Cabin

2

Louisiana

Low Country

1

Mediterranean

1

Modern

62

Mountain

12

New Orleans

Northwest

69

Prairie

16

Ranch

55

Rustic

11

Shingle

2

Southern

41

Southern Traditional

6

Southwest

2

Spanish

Traditional

221

Tudor

6

Tuscan

Vacation

8

Victorian

1

Number of Vehicles

1

14

2

179

3

13

4

192

5+

7

Garage Type

Attached

559

Detached

11

Carport

5

Driveunder

53

RV Garage

3

None

279

Garage Location

Front

343

Side

34

Rear

23

Courtyard

3

Bedroom and Bath Options

Bedrooms - Clustered

226

Bedrooms - Split

71

Master Suite - 1st Floor

312

Master Suite - 2nd Floor

250

Master Suite - Lower Level

7

Master Suite - Sitting Area

10

Two Master Suites

17

In-Law Suite

14

Jack & Jill Bath

27

Kitchen and Dining

Breakfast Nook

78

Two Kitchen Islands

Butler Walk-in Pantry

78

Butlery

Formal Dining

31

Laundry Location

Laundry Access from Master Suite

8

Laundry - Upstairs

136

Laundry - Lower Level

17

Laundry - Main Level

231

Laundry Chute

1

Additional Rooms

Bonus Room

29

Den

24

Flex Room

29

Game/Rec Room

17

Home Office

59

Home Theater

7

Keeping Room

1

Library/Study

21

Loft

47

Media Room

1

Mudroom

124

Playroom

1

Safe Room

Sport Court

Sunroom

5

Two Story Great Room

34

Wet Bar

7

Wine Room

Outdoor Features

Wrap Around Porch

10

Outdoor Fireplace

1

Outdoor Kitchen

Courtyard

5

Stacked Porches

2

Foundation

Basement

291

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

410

Daylight

59

Joist

Monolithic Slab

12

Pier

1

Piling

Post/Beam

2

Post Frame

Post/Pier

Raise Island

Slab

415

Stem Wall

10

Walkout

157

Special Features

Casita

Elevator

3

Handicapped Accessible

6

Multiple Stairs

2

Split Level

5

More Special Features

Exterior Walls

Block / CMU (main floor)

6

2x4

254

2x6

505

2x8

ICF

2x4 and 2x6

Log

1

Metal

2

Collections

Exclusive

48

New

Client Photos

6

Interactive Tours

13

House Plan Videos

12

Photo Gallery

47

Luxury

Premium Collection

Lake House Plans

2

ADU

3

More Collections

100 Most Popular

Attached Apartments

1

Builder Bundles

Canadian House Plans

104

Closed Floor Plans

1

Dogtrot House Plans

Home Office Studio

Large

253

Materials List

506

Metric

65

Multi-Generational

7

On Sale

Pool House

Post-Frame

Recently Sold

238

Shed

Timber Frame

USDA Approved

8

Lot Features

Narrow Lot

202

Front/Up Sloping

12

Rear Sloping

5

Side Sloping

1

Sloping Lot

33

Find your plan

House Plans
Trending
Styles
Collections
Client Builds
Recently Sold
Most Popular
New
By US State
By CA Province

For builders

Builder Rewards Program
Featuring AD Plans to Your Customers
Outreach and Promotion
Builder Customer Service
Builder Pro Subscription

For Real Estate Agents

Real Estate Agent Rewards Program
Featuring AD Plans to Your Customers
Outreach and Promotion
Real Estate Agent Customer Service

Services

What's included
Cost-to-Build Report
Modifications
Custom House Plans
Become an AD Designer
Become an Affiliate
Photo Removal Request
Changes to Existing Orders
Home Products & Services

Policies

Return Policy
Shipping Policy
Privacy Policy
Pricing Policy
Terms & Conditions
Copyright
FAQ
Contact

About

Our Story
Reviews
Testimonials
Blog

UNITED STATES & CANADA

Call Center available 24/7

1-800-854-7852

ELSEWHERE

1-262-521-4596

Get our newsletter to receive exclusive promos and plans!

All house plans are copyright ©2025 by the architects and designers represented on our web site