There was an investor who already owned two properties and was considering a third purchase. Brooklyn was on the list of options, and the reason was simple: there is consistent rental demand. However, they had not accounted for the differences in sales prices and property tax structures compared to other boroughs.

The average rent in Brooklyn is $3,828 per month as of July 2026. The median rent is $4,350 as of June 2026, which is an 8 percent increase from the previous year. This is due to a shortage of listings. The market has recorded the lowest inventory levels in recent years, and properties are selling 30 percent faster than average. It is important to note that as rents are high, sales prices are also elevated.

When considering a third purchase, the first thing to check is the loan conditions. Investment properties require a higher down payment than primary residences, typically between 15 to 25 percent. A credit score of 620 or higher is needed to qualify for a loan, but a score above 740 is necessary to secure favorable interest rates. Interest rates for investment properties are also set 0.5 to 0.75 percentage points higher than those for primary residences. If there are already two loans in place, these conditions may be applied more strictly for the third purchase.

Next is property tax. Buildings with four or more units, such as apartments or condos in Brooklyn, are classified as Class 2. The nominal tax rate for the 2026 fiscal year is 12.439 percent, with an assessment ratio of 45 percent of market value. The effective tax rate before caps can rise to about 5.6 percent. However, the increase in assessed value is capped at 8 percent annually and 30 percent over five years. In contrast, single-family homes and townhouses with one to three units are classified as Class 1, with an effective tax rate of about 1.2 percent. It is important to remember that the type of building purchased can significantly affect the property tax burden.

• Check the difference in effective tax rates between Class 1 and Class 2
• Consider that only 75 percent of rental income is reflected in loan assessments
• If there are existing loans, recheck loan conditions for additional purchases
• Verify the number of units and year built to determine rental stabilization applicability

Tenant laws must also be reviewed. New York State strengthened landlord regulations with the Housing Stability and Tenant Protection Act in 2019. Buildings with six or more units built before 1974 are subject to rent stabilization. The limits on rent increases and renewal conditions are regulated separately. Brooklyn has many of these older multi-family buildings. It is essential to confirm the number of units and year built of the property before signing a contract.

Additionally, landlord insurance premiums, management fees of 8 to 12 percent of monthly rent if outsourced, and maintenance costs of about 1 percent of asset value annually must be added to calculate actual net cash flow. For investors with multiple properties, considering a 1031 exchange to defer capital gains tax when planning reinvestment after a sale is also worth exploring. As the number of purchased assets increases, accurately addressing each of these items can make a significant difference in outcomes.

There is always a point I emphasize when consulting with investors who own two properties. As assets increase, the documentation and reserve fund requirements demanded by lenders also rise. By comparing the cap rate, which is the net operating income divided by the purchase price, alongside existing assets, one can determine whether the new property will improve the overall cash flow of the portfolio or simply increase the number of assets. When considering a third purchase, it is appropriate to calculate not only the rental yield but also the existing loan burdens. As assets grow, the reserve fund requirements from lenders also increase, so it is safer to leave cash available to cover potential vacancies in the existing two properties, rather than just preparing the down payment for the third property. I have often seen that developing a habit of calculating conservatively as the number of purchased assets increases leads to longer-lasting investments.

This article is not investment or legal advice, and it is recommended to consult with real estate and tax professionals before making any actual contracts.