Overview: HB 5057, "Housing: codes; triplexes, quadplexes, 5-plexes, or 6-plexes in certain residential structures; allow", was introduced on March 13, 2025. The bill amends the Stille-DeRossett-Hale single state construction code act to allow for the construction of triplexes, quadplexes, 5-plexes, or 6-plexes in certain residential structures.
Purpose and Intent: The main goal of this bill is to increase housing density and affordability by permitting the development of multi-unit residential buildings in areas currently zoned for single-family homes.
Key Provisions:
- Allows for the construction of triplexes, quadplexes, 5-plexes, or 6-plexes in residential structures that were previously limited to single-family homes
- Requires that these multi-unit buildings maintain the same exterior appearance and blend in with the surrounding single-family homes
- Provides guidelines for the minimum lot size, setbacks, and other zoning requirements for these multi-unit structures
Affected Parties and Impacts:
- Homeowners and developers in residential areas will be able to build more dense, multi-unit housing
- Renters and homebuyers may have increased options for more affordable housing in these neighborhoods
- Local governments will need to update zoning codes and building permit processes to accommodate the new multi-unit structures
Procedural and Timeline Considerations:
The bill was electronically reproduced on September 26, 2025 and is currently pending further legislative action.
