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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135261GRA

Plan Number

starting at

$950

507

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 130052LLS:600 Square Foot Carriage House Plan with 1-Bedroom Apartment

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130052LLS

Plan Number

starting at

$795

598

Sq. Ft.

Bed

Bath

Story

Cars

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25781GE

Plan Number

starting at

$545

650

Sq. Ft.

Bed

Bath

Story

Cars

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420087WNT

Plan Number

starting at

$995

714

Sq. Ft.

Bed

Bath

Story

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360065DK

Plan Number

starting at

$1,495

1,180

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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62695DJ

Plan Number

starting at

$899

758

Sq. Ft.

Bed

Bath

Story

Cars

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430816SNG

Plan Number

starting at

$800

800

Sq. Ft.

Bed

Bath

Story

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51846HZ

Plan Number

starting at

$795

522

Sq. Ft.

Bed

Bath

Story

Cars

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25791GE

Plan Number

starting at

$750

814

Sq. Ft.

Bed

Bath

Story

Cars

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623069DJ

Plan Number

starting at

$899

756

Sq. Ft.

Bed

Bath

Story

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52382WM

Plan Number

starting at

$925

496

Sq. Ft.

Bed

Bath

Story

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370011SEN

Plan Number

starting at

$995

971

Sq. Ft.

Bed

Bath

Story

Cars

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22403DR

Plan Number

starting at

$1,160

686

Sq. Ft.

Bed

Bath

Story

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52385WM

Plan Number

starting at

$925

496

Sq. Ft.

Bed

Bath

Story

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52334WM

Plan Number

starting at

$925

594

Sq. Ft.

Bed

Bath

Story

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51866HZ

Plan Number

starting at

$1,295

732

Sq. Ft.

Bed

Bath

Story

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22497DR

Plan Number

starting at

$450

360

Sq. Ft.

Bed

Bath

Story

Plan image - 871006NST:Rustic Wheelchair Accessible Shingle Cottage - 681 Sq Ft

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871006NST

Plan Number

starting at

$1,195

681

Sq. Ft.

Bed

Bath

Story

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270103AF

Plan Number

starting at

$995

1,139

Sq. Ft.

Bed

Bath

Story

Cars

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46076HC

Plan Number

starting at

$750

480

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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67776NWL

Plan Number

starting at

$899

900

Sq. Ft.

Bed

Bath

Story

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67779NWL

Plan Number

starting at

$899

893

Sq. Ft.

Bed

Bath

Story

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360074DK

Plan Number

starting at

$1,495

1,353

Sq. Ft.

Bed

2.5

Bath

Story

Cars

Plan image - 85345MS:Modern Garage Studio with an RV Bay

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85345MS

Plan Number

starting at

$1,606

609

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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)

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Barndominium

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Craftsman

163

Country

349

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354

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137

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118

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266

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115

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206

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190

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Number of Vehicles

200

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Detached

197

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Driveunder

RV Garage

None

382

Garage Location

Front

309

Side

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Bedrooms - Clustered

129

Bedrooms - Split

Master Suite - 1st Floor

403

Master Suite - 2nd Floor

284

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Jack & Jill Bath

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Breakfast Nook

Two Kitchen Islands

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Laundry - Upstairs

158

Laundry - Lower Level

Laundry - Main Level

407

Laundry Chute

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Home Theater

Keeping Room

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Loft

Media Room

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Safe Room

Sport Court

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Two Story Great Room

Wet Bar

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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

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Exterior Walls

Block / CMU (main floor)

2x4

323

2x6

667

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ICF

2x4 and 2x6

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166

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466

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USDA Approved

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Narrow Lot

702

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Rear Sloping

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