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.
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.
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.
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.
A fence permit is required for all projects inside the city limits. Regulations and requirements can be found by visiting here. Most fences within the City of Raleigh fall under the Minor Permitting category and require plans be submitted with the locate of proposed fence.
If you fail to get a permit for work that requires it, you can be fined. You may be forced to remove a building or tear out completed work.
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 are required for all work that falls under the scope of the building code. This includes most structural changes to your property, electrical, plumbing, HVAC work, and more.
Failing to get the proper permit for your project may result in you having to demolish it, or hire a professional to step in and take over. In North Carolina, you're required to have a building permit whenever your structure such as a deck is larger than 12 feet.