Building permits are required for all construction not specifically exempted (see exempted work list listed on page 4). This includes houses, garages, most decks, commercial projects, installation of propane appliances, grading, projects requiring framing, electrical, mechanical, plumbing, etc.
Garden sheds, tool sheds, and play structures - Structures less than 200 square feet do not require a permit. See our Garden sheds, gazebos, and play structures handout.
Due to its permanent nature, you will likely need a permit for a pergola build. During the permit process, an engineer looks over the plans to ensure that the construction of the hardscape is safe and stable. You still need a permit even if your unit is on private property.
The minimum setback from the property line ranges from 3 to 5 feet depending on which zone your house is in. You usually measure from the point of the structure closest to the property line. I would be very careful about building closer to the property line without explicit permission from your neighbors.
A building permit shall not be required for the following: One-story detached accessory buildings used as tool and storage sheds, playhouses and similar uses, provided the projected roof area does not exceed one hundred twenty square feet. Fences not over six feet high. Oil derricks.
Q: Do I need a permit to cement patios or walkways on private property? A: A permit is not required if the patio or walkway creates and/or replaces less than 2,000 square feet of impervious surface (i.e. a surface that water will not drain through).
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. If it's less than that, it doesn't.
When is a permit required? An attached structure with no walls that is used as an exterior covering associated with a dwelling unit. A building permit is required for all attached porch or patio covers and attached carports regardless of size.
Typically, planning consent is not necessary for a shed or outbuilding, if its proposed floor area is below 15 square metres, it does not include sleeping accommodations, and the whole structure does not exceed a height of 2.5 metres (if it is located within 2 metres of the property boundary).
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. Please note, Sheds and/or Structures under 120 square feet do require a Planning Permit.