“All-In” ADU Cost Exposed: Real Prefab Prices in California

A Backyard That Pays: Sunnyvale Homeowner Secures $3,700/Month in Rent

Looking to rent out an ADU in California? Here’s a real example of how one Sunnyvale homeowner added a 2-bedroom, 2-bath accessory dwelling unit (ADU) to their property — and began earning $3,700/month in rental income just eight months after starting the project.

Whether you’re planning to build an ADU for passive income, long-term property value, or multigenerational living, this story highlights what’s possible when the right plan, layout, and timeline come together.

A Plan That Worked

From the beginning, the homeowner had a clear strategy: build a high-quality unit, attract a great tenant, and make the numbers work without wasting time.

They weren’t chasing a fantasy timeline — but they also didn’t want to wait a year or more to see results.

In just eight months from project start to tenant move-in, they were collecting income and seeing their plan pay off.

Designed for Flexibility

Not all rental units are created equal. We designed this L-795 to work for multiple living scenarios — including traditional roommate arrangements, which expand the tenant pool and rental appeal.

  • Two bedrooms on opposite ends of the unit
  • Two full bathrooms, each with convenient access
  • Shared central living space that feels open and balanced
  • Strong privacy and noise separation
  • Modern finishes that justify top-market rent

The result? A unit that leased quickly, at a premium price, with multiple options for future tenants.

From Wasted Space to Working Asset

Before the build, the yard was underutilized — a blank area that required maintenance but provided no return.

Now, it generates over $44,000/year, increases the home’s resale value, and offers long-term flexibility — whether for rental income, multigenerational living, or future downsizing.

It’s not just a nice addition. It’s a real, working asset.

What Sets a Great Rental ADU Apart

Plenty of backyard units look nice on a flyer. But real rental performance comes down to livability, design, and build quality.

This project was built with those priorities from day one. It wasn’t about squeezing in square footage — it was about delivering comfort, privacy, and modern functionality that tenants notice and value.

Those are the choices that get you $3,700/month — not shortcuts.

More Than Just Rent

Yes, the income is a big win. But what really excited the homeowner was the long-term upside:

  • An asset that pays for itself
  • A better use of land
  • A flexible option for whatever life brings next

This project gave them control. Confidence. And momentum.

Thinking About Renting Out an ADU in California?

This could be your story. Whether you’re exploring how to build an ADU in California, want to rent out a new 2-bedroom ADU, or just want to know how long an ADU project takes — we can help.

If this Sunnyvale success story hits home, don’t wait. We only take on a limited number of builds, and timelines fill up quickly.

Book a call and let’s explore what’s possible on your property — just like we did in Sunnyvale.

Discover More

“All-In ADU Cost” Is a Useless Term: What You Actually Pay for a Prefab ADU in California

Inside Our New ADU Showroom in Los Angeles

How Long Does It Take to Build an ADU? In San Jose, A Lot Less Time Now