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...

Hide

67799NWL

Plan Number

starting at

$699

$594.15

393

Sq. Ft.

Bed

Bath

Story

Cars

Tour

Hide

623402DJ

Plan Number

starting at

$699

$594.15

593

Sq. Ft.

Bed

Bath

Story

Hide

Exclusive

430813SNG

Plan Number

starting at

$800

750

Sq. Ft.

Bed

Bath

Story

Hide

43023PF

Plan Number

starting at

$605

$514.25

798

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 420168WNT:1-Bedroom Modern Cottage ADU House Plan w/ Vaulted Living - 594 Sq Ft

Hide

Exclusive

420168WNT

Plan Number

starting at

$995

594

Sq. Ft.

Bed

Bath

Story

Hide

68706VR

Plan Number

starting at

$1,475

$1,253.75

1,180

Sq. Ft.

Bed

Bath

Story

Cars

Hide

68574VR

Plan Number

starting at

$950

$807.50

676

Sq. Ft.

Bed

Bath

Story

Plan image - 430822SNG:650 Square Foot Board and Batten ADU with Loft

Hide

Exclusive

430822SNG

Plan Number

starting at

$750

650

Sq. Ft.

Bed

Bath

Story

Plan image - 420167WNT:1-Bed ADU Cottage House Plan with Carport Under 500 Sq Ft

Hide

Exclusive

420167WNT

Plan Number

starting at

$895

420

Sq. Ft.

Bed

Bath

Story

Cars

Tour

Hide

623395DJ

Plan Number

starting at

$899

$764.15

690

Sq. Ft.

Bed

Bath

Story

Hide

31207D

Plan Number

starting at

$995

$845.75

832

Sq. Ft.

Bed

2.5

Bath

Story

Cars

Hide

680370VR

Plan Number

starting at

$1,450

$1,232.50

2,393

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 420094WNT:476 Square Foot ADU with 6-Foot-Deep Porch

Hide

Exclusive

420094WNT

Plan Number

starting at

$895

476

Sq. Ft.

Bed

Bath

Story

Hide

Exclusive

430807SNG

Plan Number

starting at

$800

750

Sq. Ft.

Bed

1.5

Bath

Story

Hide

62575DJ

Plan Number

starting at

$699

$594.15

533

Sq. Ft.

Bed

Bath

Story

Hide

72816DA

Plan Number

starting at

$1,375

$1,168.75

1,284

Sq. Ft.

Bed

Bath

Story

Cars

Hide

68563VR

Plan Number

starting at

$900

$765

444

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 845001REM:1-Bed Contemporary ADU Cottage with Vaulted Ceilings - 800 Sq Ft

Hide

Exclusive

845001REM

Plan Number

starting at

$995

800

Sq. Ft.

Bed

Bath

Story

Hide

28941JJ

Plan Number

starting at

$695

$590.75

420

Sq. Ft.

Bed

Bath

Story

Cars

Plan image - 420025WNT:Modern 2-Bed Scandinavian-Style Cabin - 812 Sq Ft

Hide

Exclusive

420025WNT

Plan Number

starting at

$995

812

Sq. Ft.

Bed

Bath

Story

Hide

765034TWN

Plan Number

starting at

$1,095

$930.75

980

Sq. Ft.

Bed

Bath

Story

Cars

Hide

52282WM

Plan Number

starting at

$925

$786.25

550

Sq. Ft.

Bed

Bath

Story

Hide

22458DR

Plan Number

starting at

$1,160

$986

676

Sq. Ft.

Bed

Bath

Story

Hide

940003JNK

Plan Number

starting at

$1,295

$1,100.75

1,357

Sq. Ft.

Bed

1.5

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.

Filter

Clear All

Search for a keyword

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

Collections

Exclusive

166

New

Client Photos

Interactive Tours

House Plan Videos

Photo Gallery

Luxury

Premium Collection

Lake House Plans

ADU

751

More Collections

100 Most Popular

Attached Apartments

Builder Bundles

Canadian House Plans

Closed Floor Plans

Dogtrot House Plans

Home Office Studio

Large

Materials List

633

Metric

Multi-Generational

On Sale

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

Find your plan

For builders

For Real Estate Agents

Services

Policies

About