Expand Middle Housing.

SB 497 requires all North Carolina local governments to allow "middle housing" types - including duplexes, fourplexes, townhouses, and similar multi-unit structures - in every residentially zoned area, including zones currently permitting only single-family homes. It prohibits local governments from blocking these housing types through excessive regulations, such as requiring public hearings, restricting building height to less than three stories, or mandating commercial building codes or fire sprinklers. The law also prevents restrictions on long-term rentals and private parking arrangements, while exempting historic districts and requiring existing municipal infrastructure (water/sewer systems) to be available. Local governments must use the same permitting processes for middle housing as for single-family homes, with an 18-month implementation deadline. This bill aims to increase housing options and affordability by expanding where multi-unit housing can be developed without changing zoning maps.