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
Review the following information:
- Minimum Standards for Dwellings (pdf)
- Interior Remodeling or Alterations
- Exterior Remodeling or Alterations
- Finding a licensed contractor
- Hiring a Residential Contractor – what do I need to know? (pdf)
- Site Plan
- Zoning Approval
About Conversions
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 Mar 7, 2019
