Ithaca ADU Zoning Requirements
A comprehensive overview of zoning rules and land use regulations for ADUs in Ithaca, NY.
Where ADUs Are Permitted
ADUs are permitted in most residential zones throughout the City of Ithaca. The city's updated ADU ordinance expanded ADU rights to encourage more housing options.
- R-1a (Low-Density Residential)
- R-1b (Single-Family)
- R-2a (Two-Family)
- R-2b (Multiple Residence)
- R-3a (High-Density Residential)
Key Dimensional Standards
Maximum ADU Size
800 sq ft
Rear Setback
5 feet minimum
Side Setback
5 feet minimum
Maximum Height
24 ft (detached)
Lot Coverage
Per base zone rules
Lot Size Minimum
5,000 sq ft
Important Restrictions
Short-Term Rentals
ADUs used for short-term rentals (fewer than 30 days) may require separate permits and are subject to local STR regulations.
Historic Districts
Properties in Ithaca's historic districts may face additional design review requirements and height restrictions.
Flood Zones
ADUs in FEMA-mapped flood zones must meet additional elevation and flood-proofing standards.
Utility Connections
ADUs must have independent utility connections or demonstrate shared service capacity.
Not Sure If Your Property Qualifies?
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