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ADU vs Whole-Home Rental: Investor Cash Flow Comparison

ADU or whole-home rental: which cash flows better?

Camillus investors looking at residential rental yield have two structurally different paths. Buy a single-family home and rent it whole. Or buy an owner-occupied home, convert the basement or garage into an ADU, live in the main unit (or rent it out), and run two rental streams from one parcel. The adu vs rental cash flow numbers say different things at different deal sizes, and the right answer depends as much on the investor’s operational appetite as on the headline yield.
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The Whole-Home Rental Model

A typical 1400 to 1800 square foot Camillus single-family home rents at 1850 to 2400 dollars per month, with operating expenses (tax, insurance, maintenance reserve, vacancy) running 32 to 40 percent of gross. Net operating income lands at 13,800 to 19,200 dollars annually on a stabilized basis. On an all-in acquisition basis of 280,000 to 360,000 dollars, cap rate runs 4.5 to 5.5 percent.

The ADU + Main Unit Model

An owner-occupied Camillus home with a converted basement or garage ADU produces dual income. ADU rent typically runs 1150 to 1450 dollars per month at full occupancy. If the investor also rents the main unit (after moving out), the combined rent often clears 3000 to 3700 dollars monthly. NOI on the combined dual-unit stabilization runs 22,000 to 28,000 dollars on roughly the same acquisition plus 75,000 to 120,000 dollars of ADU capex. Cap rate on the all-in basis lands at 5.8 to 6.8 percent, which beats the whole-home single-rental model meaningfully.

The dual-unit math wins on yield. The whole-home model wins on operational simplicity. Investors who can handle two tenant relationships, two lease cycles, and the legal complexity of an ADU win on the dual model. Investors who want simpler operations stick with the single rental. Both pencil. Both are valid. The wrong question is which is better. The right question is which fits your operation.

– Derek Halvorsen, Operations Manager

Where the Capex Comparison Matters

The ADU model requires real upfront capex (75,000 to 120,000 dollars for a basement or garage conversion) on top of acquisition. That capex is what generates the second income stream and the higher cap rate. Investors comparing the two paths need to model the capex correctly, including the soft costs and the carry cost during conversion. A separate garage studio roi analysis applies if the conversion target is a detached structure rather than a basement.

Vacancy Assumptions That Matter

Whole-home rentals in Camillus typically run 5 to 7 percent vacancy on stabilized basis. ADUs in the same submarket typically run 6 to 9 percent vacancy because the tenant pool for studios is narrower than for whole homes. Modeling vacancy correctly across both paths produces the honest adu rental roi cny picture and prevents over-promising the dual-model upside.

Long-Term Resale Considerations

At resale, a Camillus single-family home appeals to a wide pool of owner-occupant buyers and investor buyers. A property with a permitted ADU appeals to a narrower investor-focused pool, but each prospect understands the income value of the second unit. Comparable sales on the ADU side tend to clear at 7 to 12 percent premium over equivalent single-unit comps in our submarket.

ADU vs Whole-Home Rental Cash Flow

Ready to Model Both Paths?

SAP Construction has been modeling rental yield paths for Camillus investors since 2016. Schedule a consultation and your project manager will walk the property, scope both models, and deliver a transparent estimate within 24 hours.

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FREQUENTLY ASKED QUESTIONS

STILL HAVE QUESTIONS?

Our experts are here to help. Contact us directly for a consultation or any specific questions about your project.

An ADU lets you keep the main house and add 1,000 to 1,600 in rent; a whole-home rental earns more but you give up the house.
A 60,000 to 150,000 build against CNY rents typically pays back in 6 to 12 years.
Smaller ADUs tend to hold tenants longer than full-home rentals.

STILL HAVE QUESTIONS?

Our experts are here to help. Contact us directly for a consultation or any specific questions about your project.

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