Buffalo Zoning & Land Use Guide
Key Zoning Facts
Buffalo Zoning Overview
Buffalo is the second-largest city in New York State, located at the eastern end of Lake Erie where the Niagara River begins. The city adopted its Unified Development Ordinance, known as the "Green Code," in 2017, replacing a 1953-era zoning code with a modern, form-based approach to land use regulation. The Green Code represents one of the most significant zoning overhauls undertaken by a major American city, emphasizing walkable neighborhoods, mixed-use development, adaptive reuse of historic buildings, and sustainability.
Buffalo's planning landscape reflects its history as a major industrial city that has undergone decades of population loss followed by a recent economic and cultural resurgence. The city's rich architectural heritage, including works by Frank Lloyd Wright, H.H. Richardson, and Louis Sullivan, informs preservation-oriented zoning policies. The waterfront along Lake Erie and the Buffalo River has been a focus of redevelopment planning, transforming former industrial areas into recreational and mixed-use districts.
Key Zoning Districts
The Green Code uses a neighborhood-based zone system with designations that describe character rather than traditional Euclidean categories. Principal zones include N-1S (Single-Family), N-2R (Mixed Residential), N-3R (Medium Residential), N-4-30 and N-4-50 (High Density), N-1C and N-2C (Neighborhood Centers), D-S and D-C (Downtown zones), and D-IL/D-IH (Industrial). The system emphasizes building form, streetscape standards, and placemaking rather than strict use separation.
ADU Regulations
Buffalo's Green Code permits accessory dwelling units in residential zones. ADUs may be located within an existing structure, in an accessory building, or as a new construction. Units are limited to 800 square feet and 20 feet in height. Owner occupancy of either the primary dwelling or the ADU is required. No additional off-street parking is mandated, reflecting the city's walkable neighborhood goals.
Development Process
Development in Buffalo is administered through the Office of Strategic Planning and the Department of Permit and Inspection Services. As-of-right projects receive building permits directly. Projects requiring variances or special use permits go before the Zoning Board of Appeals. The Planning Board reviews site plans, subdivisions, and projects in the Green Code's planned unit development category. The city's Preservation Board reviews projects affecting designated landmarks and historic districts.
Regulatory Layers That Apply in Buffalo
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA Flood Zones: Applicable
- View FEMA Flood Map
State — New York
- Building Code: NY State Uniform Fire Prevention and Building Code (2020 IBC)
- State ADU Override: Yes (NY ADU legislation signed 2024)
County — Erie County
- Role: Property records, tax assessment, unincorporated area planning
City / Municipal
The city's zoning ordinance, building codes, and local permits form the primary layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- HOA / CC&Rs common: Yes
- Check HOA CC&Rs for additional restrictions.
Primary Zoning Districts
- Min Lot
- 5,000 sq ft
- Max Height
- 35 ft
- Front Setback
- Average of block
- Side Setback
- 5 ft
- Rear Setback
- 25 ft
- Min Lot
- 2,500 sq ft per unit
- Max Height
- 45 ft
- Front Setback
- Average of block
- Side Setback
- 5 ft
- Rear Setback
- 25 ft
- Min Lot
- None
- Max Height
- 45 ft
- Front Setback
- 0 ft (build-to-line)
- Side Setback
- 0 ft
- Rear Setback
- 15 ft
ADU Rules in Buffalo
- Max Size
- 800 sq ft
- Max Height
- 20 ft
- Rear Setback
- 5 ft
- Side Setback
- 3 ft
- Parking
- No additional parking required
- Owner Occupancy
- Required for one unit
- Permit Timeline
- 6-10 weeks
Permit Costs & Timelines
Permit Costs & Timelines
Specific permit fee schedules for Buffalo are available from the local planning department. Fees vary based on project type, scope, and valuation.
Check Buffalo permit fees →