Information for Designers

Governing Codes

  • 2025 California Building Code
  • 2025 California Residential Code
  • 2025 California Mechanical Code
  • 2025 California Electrical Code
  • 2025 California Plumbing Code
  • 2025 California Energy Code
  • 2025 California Fire Code
  • 2025 California Green Building Standards Code

Typical Design Criteria

  • Site Class - Typically site class D, unless otherwise identified by a California licensed Soils Engineer or Engineering Geologist.
  • Seismic Design Category - Typically D or D2. Shall be determined on a site basis in accordance with the Code.
  • Basic Wind Speed (3-Second Gust) - 85 miles per hour
  • Exposure Category - B, C, or D. Shall be determined on a site basis.

Soils Report Policy

A Soils Report shall be submitted with all applications for grading or foundation work. The Building Official may waive this requirement for detached garages, agricultural structures, utility structures, and other work that is deemed to not warrant a geotechnical investigation.

Building Ordinance

Title 14 of the Municipal Code contains modifications of the State Codes as well as additional regulations, pertaining to buildings and construction.

Energy Compliance

Building permit submittals shall include documentation of compliance with the applicable Building Energy Efficiency Standards.

A Certificate of Compliance (C-1R) with all applicable signatures, shall appear on plans.  Provide heat loss calculations or specify the alternative component package used.  Show all mandatory measures on the plan.  For computer method compliance, submit two (2) copies of calculations.

Note: Some projects may require additional documentation. Please visit the California Energy Commission website for additional forms and further information.


Naturally Occurring Asbestos

Prior to issuance of a permit for work involving grading or excavation, an applicant must contact the SLO Air Pollution Control District (APCD) and submit to the Building Official an approved Asbestos Dust Mitigation Plan / Health and Safety Program or exemption letter.


Demolition Containing Asbestos

Prior to issuance of demolition permits (excluding residential buildings having four or fewer dwelling units) the applicant must contact the SLO Air Pollution Control District (APCD) and obtain Asbestos Clearance.


Environmental Health Clearance

Prior to issuance of a building permit for the remodel or construction of dining and food preparation facilities, the applicant shall submit to the Building Official a copy of the plans bearing approval of the County Department of Environmental Health.