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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560021TCD

Plan Number

starting at

$675

$573.75

572

Sq. Ft.

Bed

Bath

Story

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560023TCD

Plan Number

starting at

$675

$573.75

593

Sq. Ft.

Bed

Bath

Story

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68771VR

Plan Number

starting at

$1,250

$1,062.50

1,789

Sq. Ft.

Bed

Bath

Story

Cars

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19246GT

Plan Number

starting at

$649

$551.65

622

Sq. Ft.

Bed

Bath

Story

Cars

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720056DA

Plan Number

starting at

$1,375

$1,168.75

672

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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55223BR

Plan Number

starting at

$770

544

Sq. Ft.

Bed

Bath

Story

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35205GH

Plan Number

starting at

$995

$845.75

781

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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28031J

Plan Number

starting at

$1,495

$1,270.75

784

Sq. Ft.

Bed

Bath

Story

Plan image - 430809SNG:Universal Design ADU Farmhouse Plan with Spacious Porch

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430809SNG

Plan Number

starting at

$800

750

Sq. Ft.

Bed

Bath

Story

Plan image - 365022PED:Modern ADU with Full Kitchen, Vaulted Loft and Lower Level Bedroom

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365022PED

Plan Number

starting at

$1,245

750

Sq. Ft.

Bed

Bath

Story

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461019DNN

Plan Number

starting at

$1,095

463

Sq. Ft.

Bed

Bath

Story

Cars

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810003RBT

Plan Number

starting at

$1,100

$935

1,196

Sq. Ft.

Bed

1.5

Bath

Story

Cars

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28903JJ

Plan Number

starting at

$595

$505.75

559

Sq. Ft.

Bed

Bath

Story

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22456DR

Plan Number

starting at

$1,160

$986

629

Sq. Ft.

Bed

Bath

Story

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60678ND

Plan Number

starting at

$700

$595

691

Sq. Ft.

Bed

Bath

Story

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23451JD

Plan Number

starting at

$1,400

$1,190

500

Sq. Ft.

Bed

Bath

Story

Plan image - 85104MS:Flexible Tiny Modern House Plan

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85104MS

Plan Number

starting at

$800

744

Sq. Ft.

Bed

Bath

Story

Plan image - 85105MS:Tiny Modern House Plan with Lanai

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85105MS

Plan Number

starting at

$800

640

Sq. Ft.

Bed

Bath

Story

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62930DJ

Plan Number

starting at

$1,199

$1,019.15

839

Sq. Ft.

Bed

Bath

Story

Cars

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64477SC

Plan Number

starting at

$1,350

$1,147.50

681

Sq. Ft.

Bed

Bath

Story

Cars

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461021DNN

Plan Number

starting at

$1,095

863

Sq. Ft.

Bed

Bath

Story

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31604GF

Plan Number

starting at

$750

$637.50

540

Sq. Ft.

Bed

Bath

Story

Cars

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65719BS

Plan Number

starting at

$1,191

$1,012.35

1,191

Sq. Ft.

Bed

Bath

Story

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765045TWN

Plan Number

starting at

$975

$828.75

675

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

502

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

350

New American

Scandinavian

Mid Century Modern

Cottage

355

Contemporary

138

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

384

Garage Location

Front

309

Side

Rear

Courtyard

Bedroom and Bath Options

Bedrooms - Clustered

130

Bedrooms - Split

Master Suite - 1st Floor

405

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

408

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

186

Combo Basement-Crawl

Combo Slab-Crawl

Crawl

356

Daylight

Joist

Monolithic Slab

Pier

Piling

Post/Beam

Post Frame

Post/Pier

Raise Island

Slab

652

Stem Wall

Walkout

102

Special Features

Casita

Elevator

Handicapped Accessible

Multiple Stairs

Split Level

More Special Features

Exterior Walls

Block / CMU (main floor)

2x4

323

2x6

669

2x8

ICF

2x4 and 2x6

Log

Metal

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167

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Materials List

635

Metric

Multi-Generational

On Sale

530

Pool House

Post-Frame

Recently Sold

466

Shed

Timber Frame

USDA Approved

Lot Features

Narrow Lot

704

Front/Up Sloping

Rear Sloping

Side Sloping

Sloping Lot

Garage Features

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