ADU House Plans - Architectural Designs

ADU House Plans

Our incredible selection of Accessory Dwelling Unit (ADU) house plans is designed to enhance your property with a functional and appealing additional living space. Also known as guest houses or detached in-law suites, ADU house plans offer homeowners a fantastic opportunity to expand their living area in a unique and stylish way.

Accessory Dwelling Unit plans and designs can offer extra living space without the need for construction on your main home. ADU floor plans are usually designed to maximize space in smaller homes. For instance, the kitc...

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85330MS

Plan Number

starting at

$1,750

2,504

Sq. Ft.

5 - 7

Bed

5.5 - 7.5

Bath

Story

Cars

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29904LDG

Plan Number

starting at

$500

665

Sq. Ft.

Bed

Bath

Story

Cars

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333010JHB

Plan Number

starting at

$1,500

808

Sq. Ft.

Bed

Bath

Story

Plan image - 430819SNG:900 Square Foot Farmhouse with Optional 2-car Garage

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430819SNG

Plan Number

starting at

$800

900

Sq. Ft.

Bed

Bath

Story

Cars

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72374DA

Plan Number

starting at

$1,375

536

Sq. Ft.

Bed

Bath

Story

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135216GRA

Plan Number

starting at

$950

1,666

Sq. Ft.

Bed

Bath

Story

Cars

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490106NAH

Plan Number

starting at

$1,200

436

Sq. Ft.

Bed

Bath

Story

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31208D

Plan Number

starting at

$995

507

Sq. Ft.

Bed

Bath

Story

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490113NAH

Plan Number

starting at

$1,200

619

Sq. Ft.

Bed

Bath

Story

Plan image - 380003ASH:650 Square Foot ADU Guest House with 8'-Deep Porch

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380003ASH

Plan Number

starting at

$995

650

Sq. Ft.

Bed

Bath

Story

Plan image - 910088WHD:Transitional-Style Tiny Home Plan with 644 Square Feet of Living Space

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910088WHD

Plan Number

starting at

$1,795

644

Sq. Ft.

Bed

Bath

Story

Plan image - 910091WHD:384 Square Foot ADU with Covered Front Porch

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910091WHD

Plan Number

starting at

$1,795

384

Sq. Ft.

Bed

Bath

Story

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735009CAR

Plan Number

starting at

$1,595

831

Sq. Ft.

Bed

Bath

Story

Plan image - 246025DLR:Contemporary ADU with 1 Bedroom - 479 Sq Ft

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246025DLR

Plan Number

starting at

$995

479

Sq. Ft.

Bed

1.5

Bath

Story

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680229VR

Plan Number

starting at

$1,000

496

Sq. Ft.

Bed

Bath

Story

Cars

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680257VR

Plan Number

starting at

$950

750

Sq. Ft.

Bed

Bath

Story

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67820MG

Plan Number

starting at

$1,145

624

Sq. Ft.

Bed

Bath

Story

Plan image - 311062RMZ:1-Bed Contemporary Cabin Home Plan with Vaulted Ceilings - 300 Sq Ft

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311062RMZ

Plan Number

starting at

$1,595

300

Sq. Ft.

Bed

Bath

Story

Plan image - 420141WNT:15-Foot-Wide ADU with Open Living Space - 432 Sq Ft

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420141WNT

Plan Number

starting at

$895

432

Sq. Ft.

Bed

Bath

Story

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680308VR

Plan Number

starting at

$950

646

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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264111KMD

Plan Number

starting at

$799

674

Sq. Ft.

Bed

Bath

Story

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666277RAF

Plan Number

starting at

$750

998

Sq. Ft.

Bed

Bath

Story

Cars

Tour

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623386DJ

Plan Number

starting at

$899

795

Sq. Ft.

Bed

Bath

Story

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69861AM

Plan Number

starting at

$1,087

891

Sq. Ft.

Bed

Bath

Story

ADU House Plans FAQs

What is an Accessory Dwelling Unit (ADU)?

An Accessory Dwelling Unit (ADU) is a secondary residential unit located on the same property as a primary residence. ADUs go by various names, such as granny flats, in-law suites, secondary suites, or backyard cottages. These units are fully equipped with their own kitchen, bathroom, and sleeping facilities, providing a separate living space from the main dwelling. ADUs can take different forms, including converted garages, basement apartments, separate structures in the backyard, or additions to the main house. They offer a way to create additional housing options within existing neighborhoods, helping to address housing shortages and provide more affordable housing solutions.

Are there special regulations or zoning requirements for ADUs?

The regulations and zoning requirements for ADUs vary by location, and not all areas permit or regulate them in the same way. Many places have zoning laws governing ADU construction, including size restrictions, setback requirements, and occupancy regulations.

How are ADUs typically used?

Some common reasons for building ADUs include providing housing for family members, generating rental income, or addressing changing housing needs. ADUs are seen as a flexible and sustainable housing option, utilizing existing infrastructure and land while contributing to increased housing density.

How did the concept of Accessory Dwelling Units originate?

The idea of ADUs emerged as a response to housing shortages and the need for flexible living arrangements. It gained prominence in the mid-20th century as a way to maximize land use.

What are the key characteristics of ADU architectural plans?

ADU plans emphasize efficient use of space, often incorporating features like open floor plans, compact kitchens, and multifunctional living areas.

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Total Heated Area (Sq. Ft.)

Bedrooms

Bathrooms

Plan Type

Single-Family Homes

501

Stand-Alone Garages

220

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

Other (sheds, pool houses, offices)

Footprint

Width (feet)

Depth (feet)

Height (feet)

Floors

Styles

Barndominium

Modern Farmhouse

Craftsman

163

Country

349

New American

Scandinavian

Mid Century Modern

Cottage

354

Contemporary

138

Transitional

More Styles

A-Frame

Acadian

Adobe

Beach

Bungalow

Cabin

118

Cape Cod

Carriage

266

Coastal

Coastal Contemporary

Colonial

European

Farmhouse

Florida

French Country

Georgian

Hill Country

Lake House

Log Cabin

Louisiana

Low Country

Mediterranean

Modern

Mountain

New Orleans

Northwest

Prairie

Ranch

Rustic

115

Shingle

Southern

Southern Traditional

Southwest

Spanish

Traditional

206

Tudor

Tuscan

Vacation

190

Victorian

Number of Vehicles

200

Garage Type

Attached

Detached

197

Carport

Driveunder

RV Garage

None

383

Garage Location

Front

309

Side

Rear

Courtyard

Bedroom and Bath Options

Bedrooms - Clustered

129

Bedrooms - Split

Master Suite - 1st Floor

404

Master Suite - 2nd Floor

284

Master Suite - Lower Level

Master Suite - Sitting Area

Two Master Suites

In-Law Suite

Jack & Jill Bath

Kitchen and Dining

Breakfast Nook

Two Kitchen Islands

Butler Walk-in Pantry

Butlery

Formal Dining

Laundry Location

Laundry Access from Master Suite

Laundry - Upstairs

158

Laundry - Lower Level

Laundry - Main Level

407

Laundry Chute

Additional Rooms

Bonus Room

Den

Flex Room

Game/Rec Room

Home Office

Home Theater

Keeping Room

Library/Study

Loft

Media Room

Mudroom

Playroom

Safe Room

Sport Court

Sunroom

Two Story Great Room

Wet Bar

Wine Room

Outdoor Features

Wrap Around Porch

Outdoor Fireplace

Outdoor Kitchen

Courtyard

Stacked Porches

Foundation

Basement

186

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

355

Daylight

Joist

Monolithic Slab

Pier

Piling

Post/Beam

Post Frame

Post/Pier

Raise Island

Slab

651

Stem Wall

Walkout

102

Special Features

Casita

Elevator

Handicapped Accessible

Multiple Stairs

Split Level

More Special Features

Exterior Walls

Block / CMU (main floor)

2x4

323

2x6

668

2x8

ICF

2x4 and 2x6

Log

Metal

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166

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Materials List

634

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Recently Sold

466

Shed

Timber Frame

USDA Approved

Lot Features

Narrow Lot

703

Front/Up Sloping

Rear Sloping

Side Sloping

Sloping Lot

Garage Features

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