After putting it to the test in various backyards and gardens, we've found that the largest shed without permit is around 120 square feet. This size limit seems to be a sweet spot for many local authorities, allowing homeowners to add a functional structure without overstepping regulatory boundaries.
Types of Projects That May Be Exempt From a Building Permit in California Painting. Floor upgrades. Kitchen remodels. Small drywall projects. Common electrical work. Small outbuildings. Bathroom fixes. Fences.
Storage sheds that are less than 120 square feet and eight feet in height do not require a building permit, but still require Planning Division approval through an over-the-counter application called a Zoning Clearance.
In the City of Los Angeles, if the size of floor space exceeds 120 sq. ft. or the structure is over 12 feet in height, you need a permit. Any electrical work will require an electrical permit.
The extensions roof & ridges must not exceed the height of the original house and the eaves must not exceed 2m in height of the boundary of 3m. Single-storey extensions must not exceed 4m in height. Single storey extension width must not exceed half of the original size of the house.
The quick and simple answer is: you usually don't need a permit if the shed is 120 square feet or less. In California, most jurisdictions have adopted the 120 square foot rule. If your shed area is larger than 120 square feet, it needs a building permit.
PERMITS AND INSPECTIONS ARE REQUIRED FOR THE FOLLOWING: New Attached or Detached Buildings and Structures (Residential and Non-Residential) with a floor area greater than 120 square feet Tenant Improvements. Roof and Ground Mount Solar Installation.
Contractors who violate the law are subject to disciplinary action by CSLB, including civil penalty assessments of up to $8,000 per violation, an order of correction that requires payment of permit fees and any assessed penalties imposed by the local building department, and suspension or revocation of the license.
Per the California Residential Code detached accessory structure not exceeding 120 square feet does not require a building permit if there is no plumbing, electrical, and or mechanical equipment.