NYC ADU Income Calculator

ADU Eligibility & Income Calculator

NYC’s “City of Yes” zoning changes mean you may be able to build a rental unit on your property. Find out if you’re eligible and how much income you could earn.

Takes 90 seconds * 100% Free

What Is “City of Yes” and Why Should You Care?

In December 2024, NYC passed the most significant zoning reform in 60 years. The “City of Yes for Housing Opportunity” initiative allows homeowners to build Accessory Dwelling Units (ADUs) small rental apartments on their existing property.

For Staten Island and Brooklyn homeowners, this is a game-changer. You could potentially add $1,500-$3,000/month in rental income to your property, boost your home value by 20-30%, and help address the city’s housing shortage all at the same time.

Key Point: ADUs can be built as garage conversions, basement apartments, backyard cottages, or additions to your existing home. The rules vary by lot size and zoning district use the calculator below to check your eligibility.

Check Your ADU Eligibility

Enter your property details to see if you qualify and estimate your potential income.

Borough

Property Type

Lot Size (approx sqft)

Do You Have a Garage or Basement?

Estimated Current Home Value

Neighborhood

Your Potential Rental Income

Based on your property and neighborhood:

Monthly Rent

Estimated market rate

Annual Income

Before expenses

Home Value Increase

Estimated appreciation

Return on Investment

Estimated Build Cost: Payback:

First-year return on investment

Typical ADU Project Timeline

Step 1

2-4 wks

Design & Permits

Step 2

1-2 wks

DOB Approval

Step 3

3-6 mos

Construction

Step 4

2-4 wks

Inspection & Rent

Types of ADUs You Can Build

1. Basement Conversion

Convert your existing basement into a legal rental apartment. This is often the most affordable option ($50K-$100K) since the structure already exists. Key requirements: minimum ceiling height of 7 feet, proper egress windows, separate entrance, and fire separation from the main dwelling.

2. Garage Conversion

Turn your detached or attached garage into a studio or 1-bedroom apartment. Typical cost: $80K-$150K. Popular in Staten Island where most homes have garages. You’ll need to add plumbing, insulation, and bring the space up to residential code.

3. Backyard Cottage (DADU)

Build a brand-new small structure in your backyard. Cost: $150K-$250K+. This gives you the most flexibility in design and can be the highest-value option. Requires adequate lot size and setback compliance.

4. Above-Garage Addition

Add a unit on top of your existing garage. Cost: $120K-$200K. Great option if you want to keep your parking but add rental income. Structural engineering assessment required.

Important: The City of Yes rules are still being finalized with specific guidelines for each zoning district. Consult with a professional before starting any ADU project. Joseph can connect you with architects and contractors who specialize in NYC ADU projects.

The Financial Case for Building an ADU

Think of an ADU as adding a cash-flowing investment to your property. Here’s why homeowners across NYC are rushing to build them:

Mortgage Offset

If your mortgage is $2,800/month and your ADU brings in $1,800/month, you’ve effectively reduced your housing cost to $1,000/month. That’s a 64% reduction in your largest monthly expense.

Home Value Boost

Properties with legal rental units consistently sell for 20-30% more than comparable single-family homes. On a $600K home, that’s $120K-$180K in added value often exceeding the cost of building the ADU in the first place.

Tax Benefits

ADU construction costs, mortgage interest on the rental portion, maintenance, and depreciation can all be tax-deductible. Consult with a tax professional to maximize your benefits.

Staten Island Advantage: SI’s larger lot sizes mean more homeowners qualify for ADUs compared to Brooklyn. If you have a standard 40×100 lot (4,000 sqft) in SI, you’re likely eligible for at least a garage or basement conversion.

Frequently Asked Questions

Do I need special permits to build an ADU?

Yes, you’ll need DOB (Department of Buildings) approval and permits. The City of Yes has streamlined the process, but you still need architectural plans, permit applications, and inspections. Joseph can connect you with experienced ADU architects and expeditors.

How much does it cost to build an ADU in NYC?

Costs vary widely: basement conversions ($50K-$100K), garage conversions ($80K-$150K), backyard cottages ($150K-$250K+). Factors include size, finishes, plumbing/electrical requirements, and contractor rates. Financing options include home equity loans, HELOCs, and some new ADU-specific loan products.

Will an ADU increase my property taxes?

Yes, your property value (and therefore taxes) may increase. However, the rental income typically far exceeds the tax increase. On a $600K home, a $150K ADU might add $1,200-$1,500/year in taxes, while generating $18,000-$30,000/year in rent.

Can I Airbnb my ADU?

NYC has strict short-term rental laws. ADUs under City of Yes are intended for long-term rental (30+ days). Short-term rentals require registration and have many restrictions. Long-term tenants provide more stable, predictable income anyway.

I have a 2-family home. Can I still add an ADU?

Under City of Yes, many 2-family homes can add a third unit (ADU), especially on larger lots. The eligibility depends on your zoning district, lot size, and existing floor area ratio (FAR). Use the calculator above for a preliminary check, then schedule a consultation for detailed analysis.

Want to Know Exactly What You Can Build?

Joseph works with ADU architects and contractors across Staten Island and Brooklyn. Get a free property assessment and find out your options.

Get My Free ADU Assessment ->

No pressure * No obligation * 15-minute call

This calculator provides estimates based on City of Yes guidelines as publicly available in early 2026. ADU eligibility depends on specific zoning districts, lot dimensions, and DOB regulations which are still being finalized. Rental estimates are based on comparable market data. For personalized advice, schedule a consultation with Joseph Ranola Licensed Real Estate Agent, Bridge & Boro Team.