Accessory Dwelling Units (ADU’s)

The only “You Pick Pricing”

6 ADU’s under $100K
1 ADU under $45K

The Most Affordable ADU in the Market

As pioneers of the ADU industry, we’ve made it our mission to find the best ways to make affordable housing actually affordable. Over the past 16 years we have found that the most affordable ADU out there is one built solely by the homeowner. But not all homeowners have the know-how on building a house which is why we developed our kits. From the plans for submittal to installation with our in-depth guide our homeowners are equipped with all the resources they need to tackle their very own DIY ADU.

San Jose ADU On 5/12/21

Mayor Sam Liccardo announced a first of it's kind ADU loan tied to our goals of scaling ADU production in San Jose.

Accessory Dwelling Units

150 Sqft to 1,200 Sqft plans

Small enough to fit on smaller inner city lots and large estate properties

Turn-key solutions (design & construction)

Our knowledge, experience and building techniques gives our customers the confidence that their home will be built in the most efficient way

12 ADU Plans to Choose from:

MICRO UNIT PLANS 150 Sqft to 250 Sqft

The Micro series is a unique ADU solution set. They’re the smallest ADU designs that are built to the building code. They are not “Tiny homes” built to the RV code.

The Becky

Micro 150 | 150 Sqft —

Micro 150

Micro 200 | 200 Sqft —

The Becky

Micro 250 | 250 Sqft —


MINI UNIT PLANS 250 Sqft to 399 Sqft

The Mini’s are our most popular home sizes right now, and for good reason. They are small enough to fit on smaller inner city lots and their size makes them affordable to a much larger group of people. Don’t let their size fool you, these plans all feel much larger then they appear!

The Becky

The Becky | 288 Sqft —

The Becky

The Elisabeth | 300 Sqft —

The Becky

The Jake | 390 Sqft —


SUITE UNIT PLANS 400 Sqft to 649 Sqft

The Suite’s are the plans that started this whole ADU craze for us. They’re great plans for most suburban lots and also work great in some of the larger inner city properties. Our smallest 2 bedroom plan shows up in this group.

The Becky

The Pete | 451 Sqft —

The Becky

The Andy | 600 Sqft —

The Becky

The David | 640 Sqft —


VILLA UNIT PLANS 650 Sqft to 1,200 Sqft

The Villa’s are our largest plans in the series and they’re great for estate properties, acreage, larger corner lots and cul-de-sac lots with pie shaped configurations. These homes are great as stand alone structures or with an attached garage.

The Becky

The Julie | 700 Sqft —

The Becky

The Ryan | 792 Sqft —

The Becky

The Barbara | 1,000 Sqft —

Standard Equipment & Features

General & Exterior:

Concrete slab foundation
Fiber cement lap siding
8ft sidewall height
Composition roof
Vinyl, dual glaze, low E windows Insulation R15:walls & R30:roof
36” Exterior door (fiberglass standard)
5” baseboards throughout
Carpet throughout


Tankless water heater
Mini split heating/cooling
100AMP electrical subpanel


Raised Panel cabinets
Laminate countertops
Drop-in sink
2 burner cook top
Recessed can light above


Vanity with molded sink
Dual handle faucet
Fiberglass shower w/rod
Power vent
1.28gpf toilet
Chrome medicine cabinet Linoleum floor

Top Uses for an ADU

Personal Housing
In-law suite
Home for adult children
Rental income
Home office

Top Resons to build an ADU vs Buying a home

Reduce expenses
Decreased maintenance
Little or no debt
Self sufficientcy
reduced carbon footprint

News and Activity

Featured articles

April 3, 2019


Drawing on over 14 years experience, prefabADU has completed over 170 units…

BUILD Home and Garden Awwards | By BUILD

Read full article —

July-August, 2018

Your Questions About ADUs Answered

Find out whether this is a good housing option for your market...
By Karen Springen

Read full article —

Featured articles

January 29, 2018

Backyard container house? Not so fast

Bay Area family arduous odyssey to create modular home...
San Francisco Chronicle | By Kathleen Pender

Read full article —

April 30, 2017

Manufactured Homes as ADUs and Insights into the Prefab ADU Business Model

Steve Vallejos is the owner of a company called prefabADU based in the Bay Area of California...

Read full article —

September 13, 2018

The big cost of small dwellings: Secondary units face many hurdles, but new companies are trying to change that

While the number of ADU applications for the city of San Francisco...
By Blanca Torres

Read full article —

We offer property evaluation to help determine if one of our ADU’s work for you.

855-ADUKITS (238-5421)
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