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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777033MTL

Plan Number

starting at

$1,298

$1,103.30

560

Sq. Ft.

Bed

Bath

Story

Plan image - 85382MS:640 Square Foot Modern House Plan with Outdoor Fireplace

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85382MS

Plan Number

starting at

$1,100

640

Sq. Ft.

Bed

Bath

Story

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680129VR

Plan Number

starting at

$2,200

$1,870

752

Sq. Ft.

Bed

Bath

Story

Cars

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31220D

Plan Number

starting at

$995

$845.75

507

Sq. Ft.

Bed

Bath

Story

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550008LAN

Plan Number

starting at

$995

$845.75

900

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 533008FXD:Contemporary Coastal Plan with Detached Garage Apartment

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533008FXD

Plan Number

starting at

$1,895

3,119

Sq. Ft.

Bed

Bath

Story

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421534CHD

Plan Number

starting at

$1,195

$1,015.75

859

Sq. Ft.

Bed

Bath

Story

Cars

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680230VR

Plan Number

starting at

$1,000

$850

499

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 420127WNT:1-Bed Cottage with 14-Foot Vaulted Ceiling - 570 Sq Ft

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420127WNT

Plan Number

starting at

$995

570

Sq. Ft.

Bed

Bath

Story

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61489UT

Plan Number

starting at

$950

$807.50

1,159

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 420136WNT:2 Bed Country Cottage with 2-Sided Wrap Around Porch - 966 Sq Ft

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420136WNT

Plan Number

starting at

$995

966

Sq. Ft.

Bed

Bath

Story

Plan image - 100325GHR:ADU with Upstairs Vaulted Sleeping Loft - 627 Sq Ft

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100325GHR

Plan Number

starting at

$895

647

Sq. Ft.

Bed

Bath

Story

Plan image - 420144WNT:2-Bed Modern Farmhouse Cottage with Semi-Closed Floor Plan - 960 Square Feet

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420144WNT

Plan Number

starting at

$995

960

Sq. Ft.

Bed

Bath

Story

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264109KMD

Plan Number

starting at

$799

$679.15

590

Sq. Ft.

Bed

1.5

Bath

Story

Cars

Plan image - 420151WNT:1-Bed Colonial Cottage House Plan or ADU with Vaulted Living Room - 667 Sq Ft

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420151WNT

Plan Number

starting at

$995

667

Sq. Ft.

Bed

Bath

Story

Plan image - 318304MAT:Tiny Studio Cottage ADU with Loft - 240 Sq Ft

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318304MAT

Plan Number

starting at

$795

240

Sq. Ft.

Bed

Bath

Story

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69869AM

Plan Number

starting at

$1,072

705

Sq. Ft.

1 - 2

Bed

Bath

Story

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680372VR

Plan Number

starting at

$950

$807.50

817

Sq. Ft.

Bed

Bath

Story

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560026TCD

Plan Number

starting at

$675

$573.75

510

Sq. Ft.

Bed

Bath

Story

Plan image - 420185WNT:Contemporary ADU Guest House Plan - 479 Sq Ft

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420185WNT

Plan Number

starting at

$895

479

Sq. Ft.

Bed

Bath

Story

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72450DA

Plan Number

starting at

$2,100

$1,785

1,785

Sq. Ft.

Bed

Bath

Story

Cars

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61585UT

Plan Number

starting at

$950

$807.50

791

Sq. Ft.

Bed

Bath

Story

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180012VNW

Plan Number

starting at

$800

$680

758

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 100343GHR:1-Bed Contemporary ADU House Plan Under 600 Sq Ft

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100343GHR

Plan Number

starting at

$895

576

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

500

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

137

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

382

Garage Location

Front

309

Side

Rear

Courtyard

Bedroom and Bath Options

Bedrooms - Clustered

129

Bedrooms - Split

Master Suite - 1st Floor

403

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

185

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

354

Daylight

Joist

Monolithic Slab

Pier

Piling

Post/Beam

Post Frame

Post/Pier

Raise Island

Slab

650

Stem Wall

Walkout

101

Special Features

Casita

Elevator

Handicapped Accessible

Multiple Stairs

Split Level

More Special Features

Exterior Walls

Block / CMU (main floor)

2x4

323

2x6

667

2x8

ICF

2x4 and 2x6

Log

Metal

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166

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Materials List

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Recently Sold

465

Shed

Timber Frame

USDA Approved

Lot Features

Narrow Lot

702

Front/Up Sloping

Rear Sloping

Side Sloping

Sloping Lot

Garage Features

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