Accessory Structures in Folsom, CA (2026)
6 verified accessory structures rules for Folsom, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Folsom allows attached, detached, and junior accessory dwelling units on any parcel zoned for single-unit, two-unit, or multi-unit residential use that already has or proposes a primary dwelling. ADUs need only a building permit, not a use permit, and many types are approved ministerially.
Folsom ADU Zoning Rules
Some RestrictionsFolsom, CA, Municipal Code Sec. 17.105.010 (Purpose, applicability and where permitted)
B. Applicability. Any construction, establishment, alteration, enlargement, or modification of an accessory dwelling unit shall comply with the requirements of this chapter and the city's building and fire codes, as modified by Government Code Title 7, Division 1, Chapter 13. For the purposes of this chapter, accessory dwelling units include attached, detached, and junior accessory dwelling uni...
ADU Impact Fees
Folsom cannot charge city impact fees on an ADU of 750 square feet or less, or a JADU of 500 square feet or less. Larger ADUs pay impact fees prorated by square footage compared to the primary home, not the full new-home rate.
Folsom ADU Impact Fee Exemption
Light RestrictionsFolsom, CA, Municipal Code Sec. 17.105.060(C) (Fee requirements - Impact fees)
C. Impact Fees. 1. For the purposes of this subsection, impact fees do not include any connection fee or capacity charge for water or sewer service. 2. No city-imposed impact fees shall be charged to an accessory dwelling unit that is seven hundred fifty square feet or less in floor area, or a junior accessory dwelling unit that has five hundred square feet or less in floor area. 3. For accesso...
ADU Owner Occupancy
Folsom requires the titleholder to live in either the primary home or the junior ADU whenever the JADU shares a bathroom with the main house. A JADU with its own separate sanitation facilities, or one owned by a government agency, land trust, or nonprofit, is exempt.
Folsom JADU Owner-Occupancy Rule
Some RestrictionsFolsom, CA, Municipal Code Sec. 17.105.160(B)(4) (Junior accessory dwelling unit standards - Owner occupancy requirements)
4. Owner Occupancy Requirements. All junior accessory dwelling units that have shared sanitation facilities shall be subject to an owner occupancy requirement. A person with legal or equitable title to the primary dwelling unit shall reside on the property in either the primary dwelling unit or junior accessory dwelling unit as that person's legal domicile and permanent residence. a. Exceptions...
ADU Rental Restrictions
Folsom lets owners rent an ADU or JADU separately from the main house, but only on leases of 30 days or longer; short-term or vacation rentals of an ADU are barred. The ADU also cannot be occupied until the city has approved occupancy of the primary home.
Folsom ADU Rental Term Limits
Some RestrictionsFolsom, CA, Municipal Code Sec. 17.105.070 (Rental and sale limitations)
A. Long-Term Rentals Only. An accessory dwelling unit and junior accessory dwelling unit may be rented separately from the primary residence; however, the rental shall be for a term of thirty days or longer. Occupancy of the accessory dwelling unit or junior accessory dwelling unit shall not be allowed until the city approves the occupancy of the primary dwelling unit. B. Sale or Conveyance. An...
Shed & Carport Rules
Folsom caps a detached shed or garage at 50% of the required rear yard and limits its floor area to 50% of the primary home's habitable space. A taller version built to the side or rear lot line must sit at least 75 feet from any street.
Folsom Shed and Accessory Building Rules
Some RestrictionsFolsom, CA, Municipal Code Sec. 17.58.060(B), (C) (Building sites, areas and easements)
B. A detached garage or accessory building not exceeding one story in height and without living quarters may occupy not more than fifty percent of the area of a required rear yard. In exception to the provisions of this section, a garage or other similar out building not exceeding fifteen feet in height at the ridge may be built to the side, and/or rear line; provided that said garage or sim...
Garage Conversions
Converting a garage to living space in Folsom does not need a special permit, but Municipal Code Section 17.57.030(E) treats a garage-to-nonvehicular conversion on an existing residential lot as a nonconforming use: you must still provide the required covered parking before the conversion is final, and remodels adding over 500 square feet trigger the same requirement.
Folsom Garage Conversion Parking Rules
Some RestrictionsFolsom, CA Municipal Code § 17.57.030(E)
E. Existing Facilities. Any building or use for which parking facilities become substandard by the adoption of this chapter shall be considered a nonconforming use. Such nonconforming use may continue for nonresidential buildings, but no enlargement, expansion, change of occupancy or use shall be made in such use or building unless the required number of parking spaces and other improvements...
Looking for Sacramento County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Folsom city rules.
Accessory Structures in Sacramento County →