Zoning, building permits and septic rules in Yonkers, New York

Yonkers’s own rules

• Building permitRequired

  Construction, enlargement, alteration, improvement, removal, demolition, and listed heating/chimney work inside Yonkers city limits.

  • Necessary repairs that do not materially affect structural features do not require a permit; exclusions do not include specified structural work or changes that the Department determines require a permit.
  • A permit may be refused for delinquent City or County real-property/ad valorem taxes, subject to stated public-health, safety, medical-access, and nonpayment exceptions.

  “Except as hereinafter provided, no person, owner, builder, architect, tenant, contractor, subcontractor, construction superintendent or any of their agents or employees shall commence the construction, enlargement, alteration, improvement, removal or demolition of any building or structure or any portion thereof or install a solid-fuel-burning heating apparatus, chimney or flue in any dwelling unit without first having obtained a permit from the Department.”

• Building code adoptedAdopted (with conditions)

  All activity inside Yonkers city limits.

  • Activity must comply with the New York State Uniform Fire Prevention and Building Code, Yonkers Fire and Building Code, and other applicable laws.

  “The New York State Uniform Fire Prevention and Building Code [...] is effective and binding within the City of Yonkers”

• InspectionsRequired

  Work inside Yonkers city limits for which a permit is issued.

  • Inspections occur before work is enclosed or covered and at each construction stage.
  • Owner, applicant, or agent must tell the Commissioner when work is ready and schedule each required inspection.
  • A duplicate inspection can trigger a reinspection fee if work is not ready.

  “Inspections are mandatory and shall be made as set forth in this article.”

• Certificate of occupancyRequired

  Buildings inside Yonkers city limits erected subject to the New York Uniform Code or Yonkers Fire and Building Code.

  • Department issues the certificate after final inspection when work complies with the Uniform Code, Yonkers Fire and Building Code, all applicable law, and the approved building permit.
  • Relevant zoning provisions must be complied with before issuance.

  “until a certificate of occupancy is issued by the Department”

• Zoning districtsPublished (with conditions)

  Land inside Yonkers city limits.

  • Districts are established for purposes of Chapter 43.

  district classes: 32 classes

  “For the purpose of this chapter, the City of Yonkers is hereby divided into 32 classes of districts, as follows:”

• Subdividing landRegulated (with conditions)

  Subdivisions inside Yonkers city limits, defined as a tract divided into five or more residential parcels along an existing or proposed street, highway, easement, or right-of-way.

  • Plan or map must be filed with and approved by the Bureau of Housing and Buildings and then filed with the County Clerk.
  • Plan must show adequate water supply and sewerage methods.
  • Sewerage facilities must meet the cited State Department of Health standards and City Engineer specifications.

  subdivision threshold: >= 5 parcels (Residential lots or residential building plots along a qualifying access route)

  “Any tract of land which is hereafter divided into five or more parcels”

• Permit feesPublished (with conditions)

  Building permits for one- and two-family dwellings inside Yonkers city limits.

  • Rates apply to construction or demolition, or part thereof, up to and at/above the stated threshold.
  • Section was amended June 25, 2025.

  filing fee: 125 USD (One- and two-family dwellings) · permit fee: per 15 USD per $1,000 estimated cost (Up to $1,000,000) · permit fee: per 12 USD per $1,000 estimated cost ($1,000,000 or greater)

  “$125 filing fee plus $15 per each $1,000”

• Permit processPublished (with conditions)

  Building-permit applications inside Yonkers city limits.

  • Before work begins, owner, lessee, agent, architect, engineer, or builder must apply to the Department.
  • The application is a sworn duplicate statement on Department forms and requires stated applicant, owner, property, use, plans, cost, compliance, work-description, design-professional, and supervision information.
  • Required fee, plans, and structural drawings must accompany application.
  • For work requiring a permit, application and materials must be approved and a written permit issued before work begins.

  “shall apply to the Department for a building permit.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Yonkers or Westchester County directly.

• Owner-builder exemption — Owner construction inside Yonkers city limits.
• Minimum dwelling size — Single-family dwellings in Yonkers S-200 District.
• Living in an RV — Long-term RV occupancy on private land inside Yonkers city limits.
• Camping on your land — Temporary camping on private land inside Yonkers city limits.
• Tiny homes — Tiny-home occupancy inside Yonkers city limits.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Off-grid gear

Going off-grid in Yonkers means bringing your own water and power. The kit we’d start with:

• Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
• Power Bluetti Solar generators and home battery backup for living off the grid.
• Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
• Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.

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