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.

ADU 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 kitchen might be small but have hi...

House plan exterior. Two-story Modern Farmhouse style with a gable roof, wood-beam details, and a garage with a dark gray door.

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330001WLE

Plan Number

starting at

$695

503

Sq. Ft.

Bed

Bath

Story

Cars

House plan exterior. White siding, gabled roof, and covered entry porch with columns. Features include dark-framed windows and a dark front door.

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Exclusive

420119WNT

Plan Number

starting at

$995

750

Sq. Ft.

Bed

Bath

Story

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280237JWD

Plan Number

starting at

$1,750

628

Sq. Ft.

Bed

Bath

Story

Cars

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50229PH

Plan Number

starting at

$1,095

604

Sq. Ft.

Bed

Bath

Story

Cars

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25419TF

Plan Number

starting at

$889

708

Sq. Ft.

Bed

Bath

Story

Cars

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849060PGE

Plan Number

starting at

$1,272

1,602

Sq. Ft.

Bed

Bath

Story

Cars

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680132VR

Plan Number

starting at

$1,275

613

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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61718UT

Plan Number

starting at

$700

616

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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420149WNT

Plan Number

starting at

$995

936

Sq. Ft.

Bed

Bath

Story

House plan exterior with Craftsman-style elements. Features a two-car garage, porch, and gabled roofline. Includes vertical siding and stone accents.

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135261GRA

Plan Number

starting at

$1,050

507

Sq. Ft.

Bed

Bath

Story

Cars

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50201PH

Plan Number

starting at

$1,095

484

Sq. Ft.

Bed

Bath

Story

Cars

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360076DK

Plan Number

starting at

$1,495

1,315

Sq. Ft.

Bed

1.5

Bath

Story

Cars

House plan exterior with two stories, a covered porch, multiple dormers, and a three-car garage in a craftsman style.

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360113DK

Plan Number

starting at

$1,495

1,241

Sq. Ft.

Bed

2.5

Bath

Story

Cars

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360112DK

Plan Number

starting at

$1,495

1,494

Sq. Ft.

Bed

Bath

Story

Cars

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360123DK

Plan Number

starting at

$1,495

1,494

Sq. Ft.

Bed

Bath

Story

Cars

Modern house plan exterior with two stories, horizontal siding, stone base, and glass garage door.

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62382DJ

Plan Number

starting at

$1,199

915

Sq. Ft.

Bed

Bath

Story

Cars

House plan exterior with two stories, a two-car garage, and a gabled roof. Features include white trim, horizontal siding, and a small porch.

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61507UT

Plan Number

starting at

$950

1,049

Sq. Ft.

Bed

Bath

Story

Cars

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810044RBT

Plan Number

starting at

$995

990

Sq. Ft.

Bed

Bath

Story

Cars

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51902HZ

Plan Number

starting at

$795

525

Sq. Ft.

Bed

Bath

Story

Cars

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420090WNT

Plan Number

starting at

$995

728

Sq. Ft.

Bed

Bath

Story

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400012FTY

Plan Number

starting at

$1,300

1,261

Sq. Ft.

Bed

Bath

Story

Cars

House plan exterior featuring Modern Farmhouse style with two stories, a two-car garage, upper-level balcony, and a gable roof.

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62837DJ

Plan Number

starting at

$1,399

1,604

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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420138WNT

Plan Number

starting at

$995

825

Sq. Ft.

Bed

Bath

Story

House plan exterior with board and batten siding, metal roof, and a gable roof. Includes a patio with double doors and large windows.

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420089WNT

Plan Number

starting at

$995

600

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

542

Stand-Alone Garages

241

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

Other (sheds, pool houses, offices)

Footprint

Width (feet)

Depth (feet)

Height (feet)

Floors

Styles

Modern Farmhouse

Scandinavian

Craftsman

167

Barndominium

Transitional

Contemporary

147

Country

333

Mid Century Modern

New American

107

Cottage

335

More Styles

A-Frame

Acadian

Adobe

Beach

Bungalow

Cabin

128

Cape Cod

Carriage

263

Coastal

Coastal Contemporary

Colonial

European

Farmhouse

Florida-Style

French Country

Georgian

Hill Country

Log Cabin

Louisiana-Style

Low Country

Mediterranean

Modern

106

Mountain

New Orleans

Northwest

Prairie

Ranch

Rustic

114

Shingle

Southern

Southern Traditional

Southwest

Spanish

Traditional

199

Tudor

Tuscan

Vacation

176

Victorian

Number of Vehicles

210

102

Garage Type

Standard

Attached

Detached

195

Carport

Driveunder

RV Garage

None

380

Garage Location

Front

328

Side

Rear

Courtyard

Bedroom and Bath Options

Bedrooms - Clustered

159

Bedrooms - Split

Master Suite - 1st Floor

404

Master Suite - Upstairs

293

Master Suite - Lower Level

Master Suite - Sitting Area

Two Master Suites

In-Law Suite

Jack & Jill Bath

Bunk Room

Kitchen and Dining

Breakfast Nook

Two Kitchen Islands

Walk-in Pantry

Butlery

Formal Dining

Laundry Location

Laundry Access from Master Suite

Laundry - Main Level

412

Laundry - Upstairs

180

Laundry - Lower Level

Laundry Chute

Additional Rooms

Optionally Finished 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

Wraparound Porch

Outdoor Fireplace

Outdoor Kitchen

Rooftop Deck

Courtyard

Stacked Porches

Foundation

Basement

180

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

386

Daylight

Joist

Monolithic Slab

110

Pier

Piling

Post/Beam

Post Frame

Post/Pier

Raise Island

Slab

651

Stem Wall

Walkout

Special Features

Accessible Design

Casita

Elevator

Finished Bonus Room

Multiple Stairs

Split Level

More Special Features

Exterior Walls

Block / CMU (main floor)

2x4

298

2x6

718

2x8

ICF

2x4 and 2x6

Log

Metal

Collections

New Arrivals

Exclusive

176

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Home Office Studio

Large

Materials List

670

Metric

Multi-Generational

On Sale

Pool House

Post-Frame

Premium Collection

Recently Sold

496

Shed

Timber Frame

Unlimited Build License

407

USDA Approved

Lot Features

Narrow Lot

718

Front/Up Sloping

Rear Sloping

Side Sloping

Sloping Lot