500 Sq Ft ADU Floor Plan

Whether you want a backyard rental or ADU tiny home, our compact and efficient designs make the most of every square foot. Let’s bring smart design to small spaces.
Starting from:
$120,000
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500 Sq Ft ADU Floor Plan
500 Sq Ft ADU Floor Plan
Plan Overview

500 sq ft ADU Cost in California

1 bedroom
1 bathroom
0 garages
1 story
Benefits

Why Choose a

500
Square Foot
ADU Layout
Small Backyard
Compact design fits limited lots with ease.
Rental Income
Balanced layout brings steady rental value.
Flexible Living
Great as a guest house, office, or studio.
Lower Costs
Smaller builds need less care and money.
How it Works

Steps to Build a

500
sq ft ADU
Building a small ADU might feel like a big step—but it’s easier than you think. Here’s a simple look at how it usually goes:
01
Site Evaluation & Feasibility
We assess your property and local zoning rules.
02
Choose or Customize Floor Plan
Pick from prefab models or create your own small ADU design plans.
03
Permit Approval Process
We handle permits so you don’t have to.
04
Construction & Installation
Efficient building timeline for your 500 sq ft ADU.
05
Interior Finishing & Inspection
From cabinetry to flooring, we finish it all.
06
Final Walkthrough & Move-In
Final Walkthrough & Move-In
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Cost Estimate

A 500 sq ft ADU costs between $120,000 and $250,000, depending on whether you go with a prefab design or build something custom. It’s a more budget-friendly way to add extra living space without going all-in on a full-sized ADU.
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FAQ

Quick Answers

Ask Anything
Can I build a 500 sq ft ADU in my backyard?
Yes! Most California cities allow this size under ADU rules.
Is 500 square feet enough for a 1-bedroom ADU?
Definitely. Many compact ADU floor plan ideas include a bedroom, bathroom, and living area.
Are prefab ADUs available in 500 sq ft?
Yes, we offer multiple prefab models that start at 500 sq ft.
What kind of utilities are needed?
Just like a small home - water, sewer, and electricity are required.

See More Plans

1000 sq ft Plan

1000 sq ft Plan

Starting from:
$ 200,000
900 sq ft Plan

900 sq ft Plan

Starting from:
$ 200,000
800 sq ft Plan

800 sq ft Plan

Starting from:
$ 160,000
750 sq ft Plan

750 sq ft Plan

Starting from:
$ 160,000
700 sq ft Plan

700 sq ft Plan

Starting from:
$ 150,000
450 sq ft Plan

450 sq ft Plan

Starting from:
$ 120,000
600 sq ft Plan

600 sq ft Plan

Starting from:
$ 130,000
400 sq ft Plan

400 sq ft Plan

Starting from:
$ 100,000

Ready to Unlock More Space?

Chat with us about your ADU goals and explore your best ADU floor plans 500 sq ft.
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More information

If you’re looking to add a little extra space without a huge footprint, a 500 sq ft ADU is a smart and affordable option. Whether you're downsizing, creating a space for family, or planning to earn rental income, this mini ADU home can fit right into your lifestyle.
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Our adu floor plans 500 sq ft are created with real-life functionality in mind, offering smart layouts, storage solutions, and flexible use of space.

How Much Does It Cost to Build a 500 sq ft ADU Small HomeCurious about how much a 500 sq ft ADU costs in Southern California? The price can change depending on your lot and the finishes you choose, but we’re happy to give you a rough estimate right away.Still wondering, “How much does it really cost to build a 500 sq ft ADU small home?” Let us help you figure it out with a personalized estimate. With our experience, you’ll get access to stylish, budget-friendly ADU design plans that meet all the local codes.Schedule a Free Consultation with the ADU Scale team to get started - your perfect small space is just a few steps away.