Existing ADU vs. “ADU Potential”: Two Very Different Investments

When I'm looking at Los Angeles properties, I see the phrase “ADU potential” used pretty loosely.

Sometimes it means a property already has a permitted, rentable second unit.

Sometimes it means there's a detached garage that might be convertible.

And sometimes it means there's simply enough backyard that somebody thinks an ADU could probably fit.

Those are very different things — and I wouldn't value them the same way.

An Existing ADU Is Something I Can Evaluate Today

If a property already has an ADU, I can start asking concrete questions.

Is it permitted? What is its square footage? What is it currently used for? What rent could it realistically generate? What condition is it in? Does it have separate utilities? How does its location affect privacy and the use of the rest of the property?

There are still things to verify, but I'm evaluating an existing asset.

With “ADU potential,” I'm evaluating an idea.

Potential Means the Buyer Still Has to Create the Value

Say a future ADU might rent for $2,500 per month.

That's potentially $30,000 a year in gross rental income, which sounds compelling.

But that income doesn't exist yet.

Before it does, somebody has to pay for design, permitting and construction. There may also be utility upgrades, sewer work, demolition, grading, drainage improvements or other site work.

Then there's time. Even if the project makes financial sense, the owner may spend months — or longer — before collecting the first rent check.

That's why I don't look at projected future rent and immediately translate it into today's property value.

The buyer still has to create that value.

The Site Can Change the Equation

This is also why two Los Angeles properties with similar-sized backyards can present very different opportunities.

A detached garage at the end of a usable driveway may provide a logical starting point.

Another property may have plenty of open land but poor access, awkward utility locations, significant grade changes or a layout that makes construction more complicated.

In North Hollywood, Burbank, Studio City and Sherman Oaks, I pay attention to those differences because the land itself can affect both the cost of creating another unit and how well the finished property actually functions.

A line on a listing that says “ADU potential” doesn't tell me any of that.

Existing ADUs Need Verification Too

I also don't assume that an existing backyard unit is automatically a legal ADU.

If that additional space is part of the property's value proposition, I want to understand what the city records actually show.

Was it permitted as an ADU? Does the recorded square footage match what exists? Is its current use consistent with its approvals?

A nicely finished structure can certainly be useful even if it isn't a permitted dwelling unit. But that's different from buying a property with a legally established second residence.

The distinction matters when I'm deciding what I'm willing to pay.

Don't Pay Today for Value You Still Have to Create Tomorrow

I like properties with options.

An underused garage, a deep