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...

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

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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

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69870AM

Plan Number

starting at

$1,062

677

Sq. Ft.

1 - 2

Bed

Bath

Story

Plan image - 307707RAD: Northwest ADU with Bedroom and Office - 900 Sq Ft

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307707RAD

Plan Number

starting at

$1,295

900

Sq. Ft.

Bed

Bath

Story

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62685DJ

Plan Number

starting at

$899

730

Sq. Ft.

Bed

Bath

Story

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62699DJ

Plan Number

starting at

$899

608

Sq. Ft.

Bed

Bath

Story

Cars

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2227SL

Plan Number

starting at

$560

568

Sq. Ft.

Bed

Bath

Story

Cars

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68438VR

Plan Number

starting at

$1,000

687

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 85351MS:Modern Detached 4-Car Garage with a Loft

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85351MS

Plan Number

starting at

$1,100

1,710

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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72317DA

Plan Number

starting at

$1,525

832

Sq. Ft.

Bed

1.5

Bath

Story

Cars

Plan image - 430818SNG:750 Square Foot ADU-friendly Country Cottage

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430818SNG

Plan Number

starting at

$800

750

Sq. Ft.

Bed

Bath

Story

Plan image - 85354MS:Functional 3-car ADU with Great Room with Fireplace

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85354MS

Plan Number

starting at

$868

497

Sq. Ft.

Bed

Bath

Story

Cars

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68969VR

Plan Number

starting at

$1,000

531

Sq. Ft.

Bed

Bath

Story

Cars

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22125SL

Plan Number

starting at

$620

658

Sq. Ft.

Bed

Bath

Story

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680018VR

Plan Number

starting at

$1,050

1,040

Sq. Ft.

Bed

1.5

Bath

Story

Plan image - 130061LLS:Detached 429 Square Foot Garage Apartment with Country Styling

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130061LLS

Plan Number

starting at

$795

429

Sq. Ft.

Bed

Bath

Story

Cars

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530013UKD

Plan Number

starting at

$600

701

Sq. Ft.

Bed

Bath

Story

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55078BR

Plan Number

starting at

$770

960

Sq. Ft.

Bed

Bath

Story

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267008SPK

Plan Number

starting at

$1,450

620

Sq. Ft.

1 - 2

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

434

Stand-Alone Garages

200

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

147

Country

313

New American

Scandinavian

Mid Century Modern

Cottage

316

Contemporary

117

Transitional

More Styles

A-Frame

Acadian

Adobe

Beach

Bungalow

Cabin

109

Cape Cod

Carriage

251

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

110

Shingle

Southern

Southern Traditional

Southwest

Spanish

Traditional

173

Tudor

Tuscan

Vacation

180

Victorian

Number of Vehicles

184

Garage Type

Attached

Detached

180

Carport

Driveunder

RV Garage

None

319

Garage Location

Front

281

Side

Rear

Courtyard

Bedroom and Bath Options

Bedrooms - Clustered

108

Bedrooms - Split

Master Suite - 1st Floor

340

Master Suite - 2nd Floor

261

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

145

Laundry - Lower Level

Laundry - Main Level

340

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

159

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

305

Daylight

Joist

Monolithic Slab

Pier

Piling

Post/Beam

Post Frame

Post/Pier

Raise Island

Slab

575

Stem Wall

Walkout

Special Features

Casita

Elevator

Handicapped Accessible

Multiple Stairs

Split Level

More Special Features

Exterior Walls

Block / CMU (main floor)

2x4

272

2x6

582

2x8

ICF

2x4 and 2x6

Log

Metal

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150

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Materials List

556

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Multi-Generational

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Pool House

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Recently Sold

437

Shed

Timber Frame

USDA Approved

Lot Features

Narrow Lot

617

Front/Up Sloping

Rear Sloping

Side Sloping

Sloping Lot

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