Chicago ADU Financing: How Coach House Rental Income Can Affect Your DSCR Loan

Why Chicago investors need to understand the difference between projected ADU rent, completed rental income and the financing strategy before they build.

You bought the property and there's room for a coach house. You've looked at rents in the neighborhood and you're thinking. “If I can add another $2,000 a month in rent, this deal looks completely different.” You may be right.

But there's another question you should ask before spending the money. When will the lender actually give me credit for that additional income? The answer depends heavily on what type of financing you're using and where you are in the project.

Traditional Financing and DSCR Financing Don't Look at ADU Income the Same Way

This is where investors need to understand the difference. Traditional lending guidelines can place restrictions on when and how ADU rental income can be used to qualify.

For example, Fannie Mae allows rental income from an existing ADU to be considered in certain eligible transactions, but it comes with specific restrictions, documentation requirements and limits on how much of the borrower's qualifying income can come from the ADU.

That's important, but that's not necessarily how we look at the property at Breclaw.

For our DSCR programs, once the ADU is completed, that additional rental income can become part of the property's income when we're evaluating the property's ability to support the loan.

In other words: You created another income-producing unit. We want to understand what that additional unit does to the property's cash flow.

But “I'm Going to Get $2,000” Isn't the Same as $2,000 of Supported Rent

This is where investors can get ahead of themselves. You may believe the new coach house will rent for $2,000. Great. Can the market support it? The lender and appraiser still need support for the property's rental income. That means the rents and comparable properties matter. If the market supports $1,700 and your entire investment strategy requires $2,000, I'd rather discover that before you build it.

Think About the Financing in Two Stages, this is the part I really want Chicago investors to understand.

Stage 1: Build It

• How are you paying for the construction?

• What's the budget?

• Are the plans and permits complete?

• How long will construction take?

• Do you have enough liquidity and reserves to finish?

At this point, the additional rental income doesn't exist yet.

You're financing the creation of the asset.

Stage 2: Finance What You Created

Now the coach house is complete. Instead of looking at the property you started with, we can evaluate the completed income-producing property. If that ADU adds meaningful rental income, it can improve the property's overall cash flow and potentially its DSCR.

That's where the strategy gets interesting. You didn't just add another building or unit. You created another income stream. And with DSCR financing, the income the completed property produces is a major part of the underwriting equation.

Don't Build the ADU and Figure Out the Permanent Financing Later

Before you start construction, I want to understand both loans—even if we're only closing one today.

• What will it cost to build?

• What rent can realistically be supported?

• What will the completed property be worth?

• How are you financing construction?

• What will the property's total rental income look like afterward?

And, will that income support the permanent financing you want?

That's how an investor should think about an ADU.

Not simply, “can I build another unit?”

But, “if I build another income stream, what does that allow the entire property to become?”

Thinking About Adding a Coach House or ADU?

Call Breclaw before construction starts.

Bring me the property, plans, construction budget, expected rents and what you're trying to accomplish.

Let's structure how you're getting into the project and what the financing could look like once you've created the additional income.

Breclaw Capital

Helping real estate investors understand the deal behind the deal.