Bill Summary: HB 6613

• Requires municipalities to permit accessory apartments as of right on lots containing single-family dwellings, with maximum net floor area of 30% of principal dwelling or 1,000 square feet (whichever is less), and prohibits requirements for separate utilities, passageways, exterior doors, parking fees, or familial relationships between occupants.

• Mandates zoning commissions to allow middle housing (duplexes, triplexes, quadplexes, cottage clusters, townhouses) and multifamily housing with 4+ units as of right in at least 50% of lot area within one-quarter mile of primary commercial centers in municipalities with 7,500+ population or multiple commercial centers.

• Requires 10% of residential units to be designated as assisted housing in projects with 10+ units allowed under these provisions.

• Establishes 65-day maximum review periods for accessory apartment and middle/multifamily housing permit applications, with option for applicant-consented extensions.

• Makes noncompliant zoning regulations null and void if municipalities fail to adopt compliant regulations by October 1, 2021 effective date, allowing applications to proceed under bill requirements.