County Building Permits

San Luis Obispo County, CA - 2026 Building Permit Guide

How to apply for a building permit in unincorporated San Luis Obispo County, California. Permit authority, application steps, fees, and inspection requirements.

California Updated March 2026

Permit Authority

Applies to unincorporated areas of San Luis Obispo County; residents are directed to the county Planning & Building permit pages for unincorporated permitting.

Department
San Luis Obispo County Department of Planning & Building
Address
976 Osos Street, Room 200, San Luis Obispo, CA 93408 (Permit Center); County Government Center, 1055 Monterey Street, San Luis Obispo, CA 93408
Phone
(805) 781-5600
Website
https://www.slocounty.ca.gov/departments/planning-building

Online Permit Portal

Open PermitSLO

Platform: PermitSLO (EnerGov self-service portal) • Account required: Yes • Submission: Online only

Application Process

  1. Create or log in to a PermitSLO account with an authenticated email address.
  2. Choose the correct permit path in PermitSLO using the portal search and decision tools.
  3. Fill in the required application data, including project description, contacts, and project details.
  4. Add required application contacts and project information.
  5. Upload required attachments and plans.
  6. Apply the required electronic signature.
  7. Review the application and submit it.
  8. Pay required fees in PermitSLO. Zoning clearance and review fees may appear after submission.
  9. Receive the permit number and permit card, then schedule required inspections online or by phone.
  10. Start work only after permit issuance and continue through required inspections.

Typical processing time: Small projects may be fast-tracked in about 10 working days if complete and paid up front. Typical complete review and issuance is around 2 months when the submittal is complete and responses are timely. Express renewable energy permits may take about 5 business days.

Source: San Luis Obispo County Department of Planning & Building

General Requirements

A construction permit is needed for almost any project that builds or alters a structure or its mechanical, plumbing, or electrical systems. Grading may require a separate permit.

Required Documents

  • Complete PermitSLO application
  • Required project description information, including construction type, occupancy, and number of units where applicable
  • Required attachments and plans uploaded through PermitSLO
  • Permit application fees paid before final processing
  • Owner-Builder Acknowledgment form BLD-1006 for owner-builder applications
Permit validity
Submitted applications are valid 360 days. A written 180-day extension may be requested. Expired projects may require resubmittal and new plan review fees.
Building code
2022 California Building Code updates
Owner-builder
A separate Owner-Builder Acknowledgment form is required for owner-builder applications. County forms emphasize signature responsibility, legal obligations, and owner-builder risk assumptions.
Contractor requirements
The express permit path for small repair-only categories is available only to California-licensed contractors. Plans for non-conventional single-family work and almost all commercial work must be prepared by a licensed architect or engineer.

Fees

Minimum permit fee
Building Permit Review - Residential: $379; Building Permit Review - Commercial: $453; Building Permit Review - Grading: $453
Plan check fee
Plan check fees are part of the permit review fee structure, and many permit types use per-square-foot formulas in the schedule tables.
Permit fee formula
County fee schedule uses fixed base charges and usage- or size-based charges, including per-square-foot plan check and inspection tables. One example line item is $1.00 per $25,000 in valuation for a state-related miscellaneous building fee.
Penalty (no permit)
Unpaid planning and building invoices may be voided after 15 days of non-payment in PermitSLO and may require resubmittal. Additional hourly fees may apply if review exceeds allocated time.
Payment note
Payments can be made electronically through PermitSLO or by mail with invoice. Card and ACH processing fees are 3.5% for credit card with a $2.50 minimum and $1.50 for e-check.

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

  • Storage sheds under 120 square feet with no utilities and under 12 feet in height
  • Storage sheds 120 square feet or larger, or with utilities, or over 12 feet in height require a permit

Important: Even exempt shed work must still meet setbacks and any applicable design review standards.

Inspections

How to Schedule

Scheduling deadline
Phone requests made before midnight can be scheduled for the next workday.
Inspection hours
Building inspections are not scheduled on county holidays.
Time windows
Some county guidance directs callers to check inspector availability between 7:30 AM and 8:30 AM.

Typical inspection sequence: After permit issuance, the permit card lists required inspections. The first site inspection is typically before or at early construction stages and before covered or concealed work. Failed inspections generate correction requirements before reinspection.

Additional Resources

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the San Luis Obispo County Department of Planning & Building before applying.

Frequently Asked Questions

San Luis Obispo County Building Permit FAQ

Do I need a building permit in unincorporated San Luis Obispo County, CA?
A construction permit is needed for almost any project that builds or alters a structure or its mechanical, plumbing, or electrical systems. Grading may require a separate permit.
How much does a building permit cost in unincorporated San Luis Obispo County, CA?
The minimum permit fee is Building Permit Review - Residential: $379; Building Permit Review - Commercial: $453; Building Permit Review - Grading: $453. Fees are calculated as: County fee schedule uses fixed base charges and usage- or size-based charges, including per-square-foot plan check and inspection tables. One example line item is $1.00 per $25,000 in valuation for a state-related miscellaneous building fee.. Plan check fee: Plan check fees are part of the permit review fee structure, and many permit types use per-square-foot formulas in the schedule tables..
How do I apply for a building permit in unincorporated San Luis Obispo County, CA?
1. Create or log in to a PermitSLO account with an authenticated email address. 2. Choose the correct permit path in PermitSLO using the portal search and decision tools. 3. Fill in the required application data, including project description, contacts, and project details. 4. Add required application contacts and project information. 5. Upload required attachments and plans. 6. Apply the required electronic signature. 7. Review the application and submit it. 8. Pay required fees in PermitSLO. Zoning clearance and review fees may appear after submission. 9. Receive the permit number and permit card, then schedule required inspections online or by phone. 10. Start work only after permit issuance and continue through required inspections.
How long does it take to get a building permit in unincorporated San Luis Obispo County, CA?
Typical processing time is Small projects may be fast-tracked in about 10 working days if complete and paid up front. Typical complete review and issuance is around 2 months when the submittal is complete and responses are timely. Express renewable energy permits may take about 5 business days..
What work is exempt from building permits in unincorporated San Luis Obispo County, CA?
The following work is generally exempt: Storage sheds under 120 square feet with no utilities and under 12 feet in height; Storage sheds 120 square feet or larger, or with utilities, or over 12 feet in height require a permit. Note: Even exempt shed work must still meet setbacks and any applicable design review standards.
How do I schedule a building inspection in unincorporated San Luis Obispo County, CA?
Inspections can be scheduled via: PermitSLO, (805) 788-6602. Phone requests made before midnight can be scheduled for the next workday..

Need help with your project?

Navigating permits in Unincorporated San Luis Obispo County can be complicated.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.
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