What Drawings Are Required for Residential Permits in California?

If you are planning a residential remodel, addition, ADU, or new build in California, one of the first questions that comes up is what drawings are actually required to obtain a building permit. The answer depends on the scope of work and the city you are building in, but there are consistent requirements across most California jurisdictions.

Understanding this early helps prevent plan check comments, delays, and unnecessary redesigns.

Why permit drawings matter

Permit drawings are not just a formality. They communicate how a home will be built, how it will perform, and how it will meet safety and building code requirements. Cities use these drawings to review life safety, structural integrity, energy efficiency, and zoning compliance.

Clear, coordinated drawings make the permitting process smoother and set the foundation for a successful build.

Architectural drawings

Architectural drawings form the backbone of a residential permit set. These plans show the layout, dimensions, and overall design intent of the project.

Most jurisdictions require:

• Site plan showing property lines, setbacks, and existing structures

• Floor plans with room labels, dimensions, and door and window locations

• Exterior elevations showing height, materials, and finishes

• Building sections that clarify ceiling heights, wall assemblies, and roof structure

• Door and window schedules

  
  

For many single family residential projects in California, architectural drawings do not need to be stamped by an architect. This varies by city and project type, so it is always important to confirm local requirements.

Structural drawings and calculations

Structural drawings are almost always required when a project involves new construction, additions, or changes to load bearing elements.

A structural set typically includes:

• Foundation plans and details

• Framing plans for floors, walls, and roofs

• Shear wall and lateral force resisting systems

• Structural details and connection notes

• Structural calculations

  
  

These drawings must be prepared and stamped by a California licensed engineer.

Title 24 energy compliance

California requires all residential projects to meet Title 24 energy standards. This ensures homes are designed to be energy efficient and climate appropriate.

Title 24 documentation usually includes:

• Energy compliance forms

• Mechanical system information

• Insulation and glazing performance data

  
  

These forms are typically prepared by an energy consultant and submitted alongside the permit drawings.

Mechanical, electrical, and plumbing drawings

Depending on the scope of work, mechanical, electrical, and plumbing drawings may be required.

These plans may show:

• HVAC layouts and equipment locations

• Electrical lighting plans and panel schedules

• Plumbing fixture locations and piping layouts

  
  

For smaller projects, this information may be included within the architectural or structural drawings. Larger or more complex projects often require dedicated MEP sheets.

Zoning and planning documentation

In addition to building drawings, some projects require planning level documentation before or during permit review.

This can include:

• Zoning analysis

• Floor area calculations

• Lot coverage and height calculations

• Coastal, hillside, or design review submittals

  
  

These requirements vary widely by city.

How Studio Eight Design Build approaches permit sets

At Studio Eight Design Build, we manage the full preconstruction and permitting process. We coordinate architectural drawings, structural engineering, Title 24 compliance, and any additional documentation required by the local jurisdiction.

Our goal is to submit complete, coordinated permit sets that minimize comments and keep projects moving forward.

Final thoughts

Every California city has its own nuances, but most residential permit sets include architectural drawings, structural drawings, and energy compliance documentation at a minimum. Understanding what is required from the beginning helps avoid delays and allows construction to begin with clarity and confidence.