Accessory Structures in Lake County, CA (2026)
2 rules for unincorporated Lake County, California.
Verified from official government sources
ADU Rules
Lake County's own accessory-dwelling category, the granny unit, caps size at 720 or 1,008 square feet depending on lot size, limits parcels to one such unit, and requires it to be permitted alongside or after the main house.
Lake County Granny Unit Accessory Dwelling Rules
Some RestrictionsLake County Zoning Ordinance, Art. 27 § 27.3(h) (Sec. 21-27)
(h) Granny unit: 1. A granny unit zoning permit may only be issued subsequent to or concurrently with the construction of the principal dwelling on the same parcel. 2. A granny unit shall meet the development standards of the zoning district (except as provided in Subsection 6 below) and the performance standards of Article 41. 3. The granny unit may be attached or detached from the principal d...
Shed & Carport Rules
In unincorporated Lake County a detached accessory building of 120 square feet or less, no taller than 12 feet, used as a shed or garden-tool storage does not need a building permit, though zoning clearance is still required. Larger sheds must meet the Zoning Ordinance's setback and height standards.
Lake County, CA Shed and Accessory Building Rules
Some RestrictionsLake County Code § 5-6, subsec. 6.1
No building permit will be required for a one-story detached accessory structure of one hundred and twenty (120) square feet or less, with a height above grade that does not exceed twelve (12) feet which is used as a playhouse, storage building for garden tools or other similar implements, or related use and not used for human occupancy. This exception shall not apply to plumbing or electrical ...
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