Duplex House Plans - Architectural Designs

Menu

Favorites

All Plans

Cart

Help

422 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 - 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 - 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 - 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

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

Hide

Exclusive

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

Hide

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

Hide

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

Hide

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

Hide

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

Hide

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

Hide

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

Hide

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

Hide

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

Hide

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

Hide

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

Hide

70740MK

Plan Number

starting at

$1,350

2,584

Sq. Ft.

6

Bed

4

Bath

2

Story

2

Cars

Plan image - 42426DB:Two Family Home Plan with Matching 1418 Square Foot Units

Hide

42426DB

Plan Number

starting at

$2,080

2,836

Sq. Ft.

6

Bed

4.5+

Bath

2

Story

4

Cars

Plan image - 51035MM:Full-Featured Duplex Plan with Matching 945 Square Foot 2-Bed Units

Hide

51035MM

Plan Number

starting at

$1,300

1,890

Sq. Ft.

4

Bed

2.5+

Bath

2

Story

Plan image - 42704DB:Duplex House Plan with 3 Clustered Bedrooms and a 2-Car Garage - 1176 Sq Ft Each

Hide

42704DB

Plan Number

starting at

$1,980

2,352

Sq. Ft.

6

Bed

4

Bath

1

Story

4

Cars

1
2
3
4
5
...
16
17
18

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)

422

Other (sheds, pool houses, offices)

Footprint

Width (feet)

Depth (feet)

Height (feet)

Floors

Styles

Barndominium

1

Modern Farmhouse

14

Craftsman

62

Country

53

New American

29

Scandinavian

Mid Century Modern

9

Cottage

7

Contemporary

36

Transitional

8

More Styles

A-Frame

Acadian

Adobe

Beach

4

Bungalow

Cabin

2

Cape Cod

Carriage

Coastal

5

Coastal Contemporary

Colonial

3

European

16

Farmhouse

8

Florida

2

French Country

6

Georgian

Hill Country

2

Lake House

2

Log Cabin

1

Louisiana

Low Country

1

Mediterranean

1

Modern

31

Mountain

5

New Orleans

Northwest

55

Prairie

12

Ranch

37

Rustic

8

Shingle

2

Southern

33

Southern Traditional

3

Southwest

Spanish

Traditional

169

Tudor

6

Tuscan

Vacation

7

Victorian

1

Number of Vehicles

1

12

2

137

3

11

4

154

5+

6

Garage Type

Attached

346

Detached

2

Carport

2

Driveunder

34

RV Garage

3

None

149

Garage Location

Front

269

Side

28

Rear

19

Courtyard

3

Bedroom and Bath Options

Bedrooms - Clustered

158

Bedrooms - Split

49

Master Suite - 1st Floor

250

Master Suite - 2nd Floor

178

Master Suite - Lower Level

4

Master Suite - Sitting Area

6

Two Master Suites

14

In-Law Suite

13

Jack & Jill Bath

23

Kitchen and Dining

Breakfast Nook

63

Two Kitchen Islands

Butler Walk-in Pantry

51

Butlery

Formal Dining

28

Laundry Location

Laundry Access from Master Suite

7

Laundry - Upstairs

76

Laundry - Lower Level

9

Laundry - Main Level

166

Laundry Chute

Additional Rooms

Bonus Room

29

Den

18

Flex Room

18

Game/Rec Room

9

Home Office

36

Home Theater

6

Keeping Room

1

Library/Study

16

Loft

26

Media Room

1

Mudroom

80

Playroom

1

Safe Room

Sport Court

Sunroom

5

Two Story Great Room

28

Wet Bar

5

Wine Room

Outdoor Features

Wrap Around Porch

7

Outdoor Fireplace

1

Outdoor Kitchen

Courtyard

3

Stacked Porches

Foundation

Basement

234

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

324

Daylight

54

Joist

Monolithic Slab

3

Pier

1

Piling

Post/Beam

Post Frame

Post/Pier

Raise Island

Slab

316

Stem Wall

1

Walkout

119

Special Features

Casita

Elevator

2

Handicapped Accessible

5

Multiple Stairs

1

Split Level

4

More Special Features

Exterior Walls

Block / CMU (main floor)

4

2x4

201

2x6

381

2x8

ICF

2x4 and 2x6

Log

Metal

Collections

Exclusive

14

New

1

Client Photos

5

Interactive Tours

7

House Plan Videos

5

Photo Gallery

39

Luxury

Premium Collection

Lake House Plans

2

ADU

More Collections

100 Most Popular

Attached Apartments

1

Builder Bundles

Canadian House Plans

81

Closed Floor Plans

1

Dogtrot House Plans

Home Office Studio

Large

189

Materials List

386

Metric

65

Multi-Generational

7

On Sale

Pool House

Post-Frame

Recently Sold

191

Shed

Timber Frame

USDA Approved

8

Lot Features

Narrow Lot

138

Front/Up Sloping

8

Rear Sloping

4

Side Sloping

1

Sloping Lot

27

Garage Features

Garage Features

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