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Converting a Single Family to a Duplex
At-a-glance
Is a ... | Required? |
Permit | Yes |
Contractor | No* |
Zoning Check and Site Plan | Yes |
Inspection | Yes |
Construction Plan Review | Yes |
Homeowners can perform work on their own properties without a contractor
Before You Start
Look at these pages:
Requirements for Additions and Alterations (pdf)
Minimum Standards for Dwellings (pdf)
Interior Remodeling or Alterations
Exterior Remodeling or Alterations
Hiring a Residential Contractor – what do I need to know? (pdf)
About Conversions
Conversions or Alterations of Single-Family Dwelling to Duplex (pdf)
Duties of landlords and tenants
About Permits
About the Inspections Process
Forms and Handouts for Conversions
Building / Street Use Application for a permit (pdf)
Electrical / Electric Heat Application for a permit (pdf)
Building Code Requirements for Area Separation Walls, January 1988
Procedure for Obtaining a Certificate of Occupancy for a New Building or Change of Use, Nov. 2003
Rafter Span Tables
Roofing Handout for One-family and Two-family Dwellings, April 1, 2003
Last updated Jul. 18, 2012