900 Sq Ft ADU Floor Plan
At ADU Scale, we create layouts that maximize comfort and function, offering the space you need for a true home experience. With 900 square feet, you have room for a full lifestyle - without the cost of a full home build.
Starting from:
$ 200,000
Plan Overview
900 sq ft ADU Cost in California
2 bedroom
1 bathroom
0 garages
1 story
Benefits
Why Choose a
900
Square Foot
ADU Layout
Room for Two Bedrooms
Plenty of space for family or guests
Full-Size Kitchen & Living Area
Feel like you’re in a full home
Perfect Rental Opportunity
Attracts long-term tenants or Airbnb stays
Multigenerational Living Space
Private, flexible, and comfortable
How it Works
Steps to Build a
900
sq ft ADU
We’re with you from day one to move-in, making the ADU process simple and stress-free.
01
Free Consultation
Talk through your goals and property options
02
Custom Floor Plan Design
Designed 900 sq ft ADU floor plan made to fit your space
03
Permitting & Paperwork
We manage all city approvals and documentation
04
Site Prep & Utilities
Getting your lot ready for a smooth build
05
Construction & Quality Checks
Build your ADU with high-quality materials
06
Final Touches & Move-In
Inspections, finishing touches, and keys in hand
Cost Estimate
A 900 sq ft ADU in California can cost between $200,000 and $300,000. Smaller ADUs usually cost less than $150,000. A 900 sq ft ADU gives you more space and flexibility but costs a bit more, still at a fair price.
Get My Cost EstimateFAQ
Quick Answers
Can I build a 900 sq ft ADU in my backyard?
Yes, most cities in California allow it, depending on your lot size.
Is 900 sq ft enough for a family?
Yes, it can fit two bedrooms, a full kitchen, and more.
Can this small ADU house be rented out?
Definitely. Many use it for long-term tenants or Airbnb.
What can fit in 900 sq ft?
A full home setup: 2 beds, 1-2 baths, kitchen, and living room.
Ready to Unlock More Space?
Let’s get started on your 900 sq ft ADU - we’re here to help every step of the way.
More information
What makes this size so popular? A 900 sq ft ADU floor plan gives you plenty of room to live comfortably while staying efficient and affordable. Whether you want a full-time rental, an ADU guest house, or a second home for a family, this size offers a good balance of space and ease.
See more
How Much Does It Cost to Build an 900 sq ft ADU Mini Home?
In most parts of California, the 900 sq ft ADU cost is between $200,000 and $300,000. The price depends on your lot, design, and local fees. Although it costs more than smaller ADUs, it offers better rental options and more flexibility.
Try our "Estimate My ADU Cost" tool to get a custom quote for your project.
This size also works well as a mini ADU home for multigenerational families, giving everyone their own space while staying close. It’s great for tiny ADU home enthusiasts who want more breathing room. With smart small ADU design plans, you can create a space that feels like a full-size home.