Belmont

http://www.belmont.gov/city-hall/community-development/planning-and-zoning/accessory-dwelling-units-adus

All residential zones (R-1-5, HRO, PD)

Min: None

Max attached: lesser of 50% of primary dwelling or 800 sf

Max detached: 800 sf

No parking required but, if provided, can be tandem

• Sprinklers for fire safety are required if the ADU results in a 50% increase in the original size of the residence or a combination of increase in size and remodeling impacted 50% of the original square footage. The state building code requires sprinklers for all new construction.
• All projects removing trees are subject to the Belmont Tree Ordinance.
• A restrictive covenant must be recorded on the deed prior to finalizing the building permit and issuance of occupancy.
• ADUs are not allowed in front of the primary dwelling unless the structure is already in front of the primary residence.
• Only one ADU per property is allowed.
• ADUs are not allowed on sites with multifamily dwellings.
• ADUs must comply with all requirements of the underlying zoning district.

Building permit review required. No design review of ADU is required, even if ADU is part of a larger project. Making an appointment to meet with a planner in the initial stages of the project can help avoid challenges and is highly recommended.