When applying for an ADU permit in California, your submittal package will generally need to include the following:
A completed permit application form
Proof of property ownership.
Site plans of the existing space and proposed ADU project
Detailed ADU construction plans: As follow
Architectural Plan Sets
When applying for a building permit or planning case, you’ll need to provide all relevant architectural plan sets. These plans illustrate the layout and aesthetics of your proposed project, covering details such as:
Site Plan
Floor Plans
Elevations
Sections and Details
Material Schedules
Structural Plan Sets
Structural plans are typically submitted alongside the architectural plan sets. These plans focus on the engineering aspects of the building, ensuring it meets all safety and stability requirements. Structural plans typically include:
Connections and Anchorage
Beams, Columns, and Slabs
Floor, Ceiling, and Wall Components
Structural Calculations (to support the drawings)
Mechanical, Electrical, and Plumbing (MEP) Plan Sets
Our webpage on building permit types explains the specifics of mechanical, electrical, and plumbing permits—commonly referred to as MEPs in the industry. Each of these permits requires dedicated plan sets, which are reviewed by the respective departments.
Mechanical Plan Sets cover the mechanical layout and equipment for the project, including:
Heating
Cooling
Kitchen Equipment
Smoke Control/Evacuation Systems
Duct Layouts
Energy Use Calculations (e.g., Title 24 or Mechanical Compliance Certificates)
Electrical Plan Sets review all electrical components of the project, such as:
Lights
Switches
Outlets
Transformers
Switch Gears
Electrical Calculations (e.g., Title 24 or Electrical Compliance Certificates)
Plumbing Plan Sets focus on the design and layout of water, waste, and gas piping systems, including:
Riser Diagrams: Visual representations of the pipe layout.
Plumbing Floor Plans: Detailed plans showing the location of all plumbing fixtures.
Hydraulic Calculations: Essential for determining the correct specifications for plumbing components.
Systems for Water, Waste, Grease, Gas, Fire Sprinklers, and Greywater: Comprehensive planning for various plumbing needs.
Civil Plan Sets
Civil plan sets are often necessary for new construction or lot modifications, focusing on the exterior aspects of a property. These plans are typically reviewed during a public works evaluation and include:
Grading
Landscaping
Water Retention
Drainage
Utilities
Erosion Control
5. Payment for permit fees
At Easy House, our All-in-One Service provides comprehensive permit assistance, including the following:（画图纸及图纸审批服务）
Architectural Services: Drawing and drafting of plans.
Structural Engineering
Surveying
Title 24 Compliance (T24)
Communicate with city officials and submit your plans on your behalf.
Will deliver full service when the permit approved by city. (Permit fee not included)
Please see our price for 2bed 2Bath 748sf ADU from permits to installation & include all the finish material
If you want to custom-build your house and require a unique set of architectural plans, please Contact Us for a quote.
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