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ADU Floor Plans

250+ Floor Plans From 200 to 1,200 Sq Ft.

Pick a floor plan that fits your needs and property.

The best ADU Floor Plan addresses family needs and fits the backyard like a glove. Your new ADU should look like it has always been there, not as a foreign object. It should also maximize the space – take as much of your backyard as you are willing to dedicate to the new living area.

What ADU floor plan will make the most of your backyard?

From 200 Sq Ft to 1,200 Sq Ft - see what fits in each floor plan size

12 Popular ADU Floor Plans

200 sq ft ADU Floor Plan

ADU floor plans 200 sq ft

Minimal size of an accessory dwelling unit by law is 150 sf ft. We are able to fit a bathroom and small kitchenette into a 200 sf ft studio.

300 sq ft ADU Floor Plan

ADU floor plans 300 sq ft

300 sq ft will make a comfortable studio with a kitchenette and more room for a proper bathroom. 

350 sq ft ADU Floor Plan

ADU floor plans 350 sq ft

The smallest size we offer where you can fit a tiny bedroom in addition to the open space used for living and eating.

400 sq ft ADU Floor Plan

ADU floor plans 400 sq ft

Reasonable size for a small one bedroom dwelling unit. The bathroom has enough space for a tub. The size of the kitchen can be adjusted according to your needs.

ADU Floor Plans 500 sq ft

ADU floor plans 500 sq ft

This one bedroom one bathroom can be executed in an L shaped or in a more traditional I shape layout depending on the space in your backyard.

600 sq ft ADU Floor Plan

ADU floor plans 600 sq ft

This one bedroom one bathroom can be executed in an T shaped or L shape layout depending on the space in your backyard. The layout is usually governed by access and privacy considerations.

700 sq ft ADU Floor Plan

ADU floor plans 700 sq ft

This two bedroom two bathroom ADU design makes efficient use of space with more emphasis on private quarters than on common living area.

750 sf ADU floor plan

ADU floor plans 750 sq ft

This two bedroom one bathroom ADU design has a comfortable living area, two bedrooms with closets, laundry space and the bathroom with the shower. This plan has an ADA compliant option.

800 sq ft ADU Floor Plan

ADU floor plans 800 sq ft

This two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area.

900 sq ft ADU Floor Plan

ADU floor plans 900 sq ft

This detached two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area.

1000 sq ft ADU Floor Plan

ADU floor plans 1000 sq ft

This two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area. The kitchen has an option to be a separate room.

1200 sq ft ADU Floor Plan

This two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area. Both bedroom have walk in closets, and there is an additional flex room that could be used as an office. Can easily be used as a main home for a small lot!

We often make site-specific edits to the floor plans design to meet your needs,  reflect location details and local permit requirements.

What this means? A couple of examples.

You may have a main house layout that has windows looking directly into the ADU windows if left as is. We can shift the windows so that both homes retain privacy.

You may have a huge tree in your backyard that we need to consider when placing the ADU. We redesign the foundation to make sure the arborist can bless the design and sign us off.

The best way to make sure we understand what you need is to sign up for our complimentary design call. We will run an online check of the backyard during the call with you, and you can share whatever restrictions you may want to incorporate into design.

planset with ADU floor plan

What should an ADU permit set include?

Surprisingly, the same information that any new construction plan set requires.

Title Sheet

Site and floor plan

Roof Plan

Foundation Plan

Elevations

Building Sections

Structural calculations

Energy efficiency report

Whichever ADU floor plan you select, you will not pass a final inspection without these features

Essentials for any ADU floor plan

Insulation

Type of insulation is called out in your Title 24 report provided by your energy consultant or HERS rater.

Kitchen Appliances

All ADU floor plans should show sink, cooktop, hood and fridge. These items are essential for anyone living permanently in the ADU.

Fire and CO2 Alarm

Smoke and carbon monoxide alarms are required on the wall or ceiling outside of each sleeping area. 

HVAC and Ventilation

Ductless mini splits are an accepted way to heat and cool your ADU. Energy Recovery Ventilators are an energy-efficient way to maintain indoor air quality.

Water Heater (Heat Pump)

As California goes all electric, think about the sizing of your pump – it depends on the number of people living in the ADU.

Address Numbers

ADUs are often required to have two sets of a minimum of 4 inch high house numbers – with one on ADU and an extra that is seen from the public road.