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 - 420041WNT:400 Square Foot 10-Foot-Wide House Plan

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420041WNT

Plan Number

starting at

$895

400

Sq. Ft.

Bed

Bath

Story

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940003JNK

Plan Number

starting at

$1,295

$1,100.75

1,357

Sq. Ft.

Bed

1.5

Bath

Story

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421514CHD

Plan Number

starting at

$1,195

$1,015.75

1,457

Sq. Ft.

3 - 4

Bed

2.5 - 3.5

Bath

Story

Cars

Plan image - 300090FNK:2-Bed ADU Cabin-Style House with Front Deck and Jack & Jill Bath - 910 Sq Ft

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300090FNK

Plan Number

starting at

$895

910

Sq. Ft.

Bed

1.5

Bath

Story

Cars

Plan image - 765035TWN:Flexible Craftsman Carriage House Plan with Double Garage - 887 Sq Ft

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765035TWN

Plan Number

starting at

$1,095

887

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 420150WNT:Under 1000 Square Foot ADU Farmhouse Cottage with 2 Beds

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420150WNT

Plan Number

starting at

$995

910

Sq. Ft.

Bed

Bath

Story

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61227UT

Plan Number

starting at

$700

$595

1,096

Sq. Ft.

Bed

Bath

Story

Cars

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430802SNG

Plan Number

starting at

$800

750

Sq. Ft.

Bed

1.5

Bath

Story

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68640VR

Plan Number

starting at

$950

$807.50

650

Sq. Ft.

Bed

Bath

Story

Cars

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810018RBT

Plan Number

starting at

$1,100

$935

1,345

Sq. Ft.

1 - 2

Bed

1.5

Bath

Story

Cars

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85136MS

Plan Number

starting at

$1,100

640

Sq. Ft.

Bed

Bath

Story

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560019TCD

Plan Number

starting at

$675

$573.75

576

Sq. Ft.

Bed

Bath

Story

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67764MG

Plan Number

starting at

$1,195

$1,015.75

1,032

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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22146SL

Plan Number

starting at

$560

$476

888

Sq. Ft.

Bed

Bath

Story

Cars

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530017UKD

Plan Number

starting at

$600

681

Sq. Ft.

Bed

Bath

Story

Plan image - 430808SNG:750-Square Foot Cottage House Plan with Vaulted Living Room

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430808SNG

Plan Number

starting at

$800

750

Sq. Ft.

1 - 2

Bed

Bath

Story

Plan image - 420085WNT:564 Square Foot New American Style ADU with Cozy Corner Porch

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420085WNT

Plan Number

starting at

$995

564

Sq. Ft.

Bed

Bath

Story

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360091DK

Plan Number

starting at

$1,495

$1,270.75

1,384

Sq. Ft.

Bed

2.5

Bath

Story

Cars

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69771AM

Plan Number

starting at

$1,130

944

Sq. Ft.

2 - 3

Bed

1 - 2

Bath

Story

Cars

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88333SH

Plan Number

starting at

$795

$675.75

588

Sq. Ft.

Bed

Bath

Story

Cars

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72295DA

Plan Number

starting at

$1,525

$1,296.25

882

Sq. Ft.

Bed

Bath

Story

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444198GDN

Plan Number

starting at

$1,425

603

Sq. Ft.

Bed

Bath

Story

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20055GA

Plan Number

starting at

$1,045

$888.25

792

Sq. Ft.

Bed

Bath

Story

Cars

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490108NAH

Plan Number

starting at

$1,200

$1,020

807

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

633

Metric

Multi-Generational

On Sale

529

Pool House

Post-Frame

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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