Planning commission recommends city ordinance to allow accessory dwelling units, 5-1

Sebastian, Fla. — The Sebastian City Planning and Zoning Commission voted 5-1 Thursday to recommend that City Council approve a proposed amendment to the city’s land development code to add standards and definitions for accessory dwelling units across the city.

The commission’s recommendation applied to Ordinance No. 0 25 0 6, a textual amendment that would add a definition and regulations for accessory dwelling units (ADUs), remove “guest houses” as a conditional use in two single-family zoning districts, and clarify how ADUs count toward density. The motion included two requested modifications: limit ADUs to one per lot and revise short-term rental restrictions to conform with state statute. The vote was 5 in favor, 1 opposed and one commissioner absent.

Why it matters: Supporters said ADUs would provide smaller, less costly housing options for aging parents, multigenerational households and younger workers, while staff and commissioners highlighted design standards and limits intended to keep ADUs subordinate to primary homes. Opponents and several public commenters said they worried the change could be used to create rental units that alter neighborhood character and strain services.

Staff described the proposed ordinance as citywide, not site-specific, and said it was assembled using model language from other Florida municipalities, an AARP model ordinance and guidance from the American Planning Association. A staff member said, “We did not do any workshops on this because this is a code that's going to affect the whole city,” and reviewed proposed sections on definitions, prohibitions and design standards.

Key provisions in the draft ordinance include: - Definitions and density: ADUs would be classified as accessory structures and would not be counted toward maximum gross residential density for a parcel. The ordinance would create a standalone definition of “accessory dwelling unit.” - Where permitted: ADUs would be allowed on lots that meet the minimum lot size of the applicable zoning district or certain nonconforming lots at least 70 feet wide and 7,000 square feet in area; ADUs would be limited to single-family zoning districts, not used to transform multifamily zoning lots. - Types allowed: The code would allow internal ADUs (conversion of existing interior space), conversion of garages, building additions, detached ADUs and construction of an ADU at the same time as a new primary dwelling. - Size and height caps: A gross-floor limit of the ADU not to exceed 50% of the principal dwelling’s gross floor area or 1,000 square feet, whichever is less; detached ADUs generally limited to one story except where placed above an existing detached garage or storage structure. - Use restrictions: The draft prohibits use of ADUs for short-term transient rentals and for commercial uses that attract the public; staff proposed an exception to allow approved home-occupation licenses for nonpublic businesses. The planning staff said they will revise the short-term rental language to ensure conformity with state law before council review. - Addressing, services and permits: ADUs would use the same street address as the primary structure; utility-metering arrangements (water, electric) would be left to providers (for example, Florida Power & Light and Indian River County utilities). Building permits, impact fees set by Indian River County and applicable health-department approvals for septic would still apply. Staff noted floodplain, building-code and engineering reviews remain separate processes.

Applicants who asked for the amendment explained community demand. Jim Adams, identifying himself as a representative of Renovations Plus, said developers and residents had “a number of customers ask us... if a second dwelling is something we could do for them” to accommodate aging parents and multigenerational living. Brad Reardon, co-owner of Renovations Plus, said the intent is to design ADUs that complement — not overwhelm — the primary residence: “we don't want the new structure to overwhelm the other structure.”

Public commenters expressed mixed views. Catherine Rondo, identifying herself as a resident and a parent of a handicapped child, said the proposal “was presented as help for parents ... but now all of a sudden, it's gone from helping maybe an in-law home... to rental property,” and urged caution about neighborhood impacts. Several commenters raised enforcement concerns and noted many unpermitted conversions already occur.

Staff and commissioners addressed enforcement and practical constraints. Planning staff said the county has a short-term-rental monitoring position that reviews online listings (Airbnb, VRBO) and alerts municipalities when unregistered units appear; the city would rely on code-enforcement follow-up after such notifications. Staff also emphasized that lot-coverage limits, setbacks, flood-elevation requirements, building-code standards and health-department septic approvals will limit where and how quickly ADUs actually appear.

Commission discussion also covered parking, design compatibility, addresses and utility meters. Staff said ADUs would generally have to match the materials and appearance of the primary home and might require additional off-street parking or driveway extension so vehicles do not park on the street.

The commission’s formal action recommended approval to City Council with two changes: (1) limit ADUs to one per lot and (2) amend the short-term rental prohibition to conform to state statute. The commission also voted that the ordinance met the land-development-code criteria listed on the staff cover sheet (items A–J) and directed staff to incorporate legal edits before the city-council hearing.

Next steps: The Planning and Zoning Commission’s recommendation advances the ordinance to City Council for first reading and additional legal review. Staff told the commission they anticipate making technical adjustments to comply with state law and with home-occupation and short-term-rental statutes before council review.