Plus One ADU Program

Accessory Dwelling Units (ADUs) are secondary housing units on a single-family residential lot. ADU’s benefit homeowners, renters and the community by creating more housing options while maintaining the character of single family residential suburban and rural communities. For homeowners, a code-compliant ADU can provide additional source of income, flexibility for multi-generational housing, and an increase in property value.

CDCLI has been selected by New York State Homes and Community Renewal to administer the new Plus One ADU Program in the Town of Babylon, Shelter Island, and Southampton. The Plus One ADU Program provides a full-service program to support low- and middle-income single family homeowner occupants who wish to:

  • Build a new accessory dwelling unit on their property OR
  • Improve an existing ADU that needs to be brought into compliance with code requirements.


Program Highlights

Up $125,000 in grant funding including project management costs per ADU constructed.

Program support includes ADU design, permitting, and construction costs including oversight and closeout.

Household annual income must be below current Nassau/Suffolk Area Median Income (AMI) based on family size.[1]

Homeowners and renters must maintain year-round residency and keep property in good condition and repair for 10 years or until sale of property[2]


Applications are now available! Please click below to apply.

Click here for our interest form

What documents do I need to apply?

Click here for FAQs

[1] Currently $156,300 for a family of 4.

[2] In the event of sale of property or non-compliance, the amount of grant funds will be subject to repayment in accordance with a simple annual declining balance, based on the ten-year regulatory period.


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