Can your ADU actually make money?

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An ADU can create rental income — but the rent number alone does not tell you whether the project works.

A smarter way to think about ADU income is to compare probable rent against total project cost and ongoing ownership costs. That includes design fees, permits, construction, utility work, financing costs, insurance, taxes, repairs, vacancy, and management.

I recently spoke with a couple in Jackson Heights, Queens who were excited about converting part of their home into a small rental apartment. Their first question was the one most homeowners ask: "What can we rent it for?"

They had seen nearby one-bedroom apartments listed for about $2,300 to $2,700 per month and assumed the ADU would produce similar income. On paper, that sounded strong. But once we started walking through the numbers, the decision became more nuanced.

Their basement had decent space, but the ceiling height was uneven. In some areas it was close to 7 feet; near the beams and mechanical equipment it dropped lower. That meant the design might require selectively lowering the floor, relocating utilities, or rethinking the layout. Each option added cost.

Then we looked at likely expenses: design and filing fees, construction, new plumbing, electrical upgrades, fire separation, additional insurance, contingency, and possible financing costs. A project they first imagined might cost $125,000 could easily move closer to $200,000 depending on the final scope.

The lesson was not that the ADU was a bad idea. The lesson was that rent is only one part of the decision. A homeowner needs to understand the likely income, the real cost, and how long it may take before the ADU truly improves the household's financial position.

The better question

The basic question is not, "Can I rent it?" The better question is: "After costs, risk, and time, does this ADU improve my financial position?"

Homeowners should think this through before paying for drawings or construction estimates.

Run The Numbers on Your ADU

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Budget First, Design Second

Most homeowners assume an ADU gets financed like a renovation, but the money question is really about which asset the lender is underwriting. Cash, home equity, construction loans, and renovation mortgages each carry different costs and timelines, and the one that fits depends more on your equity position than on the project itself.

Can your ADU actually make money?

An ADU can create rental income, but the rent number alone won't tell you whether the project works. The smarter question compares likely rent against total project and ownership cost, and the gap between what a homeowner imagines and what it really takes can be larger than expected.

The five main ADU types — and which one suits your property.

Most homeowners begin with one question: "Can I add an apartment?" A better question is: "Which type of ADU best fits my property?"

There are five common ADU types to consider.

Your ADU Readiness Score is only the starting point.

If you received an ADU Readiness Score, you have taken an important first step. The score can indicate whether your property has some of the basic conditions needed for an accessory dwelling unit — but it is not a final determination.

How NYC Homeowners Will Make $1,500–$3,500/Month in 2026

Many NYC homeowners are unaware that they already possess spaces within their properties that could legally generate significant monthly income. With property values and expenses rising, the opportunity to earn between $1,500 and $3,500 each month from unused areas presents a compelling solution.

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NYC embraces ADUs

NYC has embraced the ADU. Queens, Brooklyn, Bronx, and Staten Island residents have a new opportunity to enhance their property value, help their family, and their community. Learn more about ADUs.

An ADU can create rental income — but the rent number alone does not tell you whether the project works.

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