Five-Bay Accessory Dwelling Unit: Exterior Attached Addition

Five-Bay Exterior Attached Addition Floor Plan

Description of Conversion

Exterior Attached Additions can be more feasible when it comes to Five-Bay homes. The Homeowner has a lot more freedom when it comes to parameters to build within. As long as the addition is within the zoning laws, the ADU isn’t limited by existing space. This allows for more flexibility to create a space that is ADA accessible while also allowing the ADU to be accessed from within the existing home.

Pros and Cons


  • Space is less limited
  • Don’t need to worry about fitting within an existing parameter
  • Won't be losing existing space within the existing house
  • Family member will be under the same roof


  • Space to build is limited by local zoning
  • Need to extend existing plumbing, electrical, and HVAC
  • New construction, from foundation to facade

Options for Conversion:

On the pages that follow, take a closer look at housing's connections to the Interior Conversion, and Freestanding New Structure.

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One Empire Plaza
Providence, RI 02903

RI Alliance for Healthy Homes

A project of
HousingWorks RI