San Luis Obispo County, CA — 2026 Building Permit Guide

On this page 6

§ 01

Permit authority

San Luis Obispo County Department of Planning & Building

Street 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

planning@co.slo.ca.us

Coverage

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

Online portal

PermitSLO

PermitSLO (EnerGov self-service portal)

Website

Department website

Additional resources

§ 02

When a permit is required

Permit triggers and exempt work for San Luis Obispo County

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.

Scope of work

Permit?

Storage sheds under 120 square feet with no utilities and under 12 feet in height

Exempt

Storage sheds 120 square feet or larger, or with utilities, or over 12 feet in height require a permit

Exempt

Exempt Storage sheds under 120 square feet with no utilities and under 12 feet in height
Exempt 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.

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

Building code: 2022 California Building Code updates
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.
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.

Source: San Luis Obispo County Department of Planning & Building ↗

§ 03

Application process

Typical processing: 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.

01

Create or log in to a PermitSLO account with an authenticated email address.
02

Choose the correct permit path in PermitSLO using the portal search and decision tools.
03

Fill in the required application data, including project description, contacts, and project details.
04

Add required application contacts and project information.
05

Upload required attachments and plans.
06

Apply the required electronic signature.
07

Review the application and submit it.
08

Pay required fees in PermitSLO. Zoning clearance and review fees may appear after submission.
09

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 ↗

§ 04

Fee schedule

San Luis Obispo County building permit fees

Fee type

Amount

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.

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 periodically. Confirm at the official fee schedule ↗ before budgeting.

§ 05

Required inspections

Scheduling and sequence

How to schedule

PermitSLO (online)
(805) 788-6602 (phone)

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 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.

Source: San Luis Obispo County Department of Planning & Building ↗

§ 06

Frequently asked

Common questions about unincorporated San Luis Obispo County permits

01 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.

02 How much does a building permit cost in unincorporated San Luis Obispo County, CA? ▸

Building permit fees in unincorporated San Luis Obispo County, CA are set by the local building department and vary by project type and valuation. 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..

03 How do I apply for a building permit in unincorporated San Luis Obispo County, CA? ▸

To apply for a building permit in unincorporated San Luis Obispo County, CA, follow these steps: 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.

04 How long does it take to get a building permit in unincorporated San Luis Obispo County, CA? ▸

Building permit processing times in unincorporated San Luis Obispo County, CA typically run 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.. Timelines can vary based on project complexity and current department workload.

05 What work is exempt from building permits in unincorporated San Luis Obispo County, CA? ▸

Not all construction work requires a permit 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. When in doubt, confirm with the local building department before starting work.

06 How do I schedule a building inspection in unincorporated San Luis Obispo County, CA? ▸

Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated San Luis Obispo County, CA via: PermitSLO, (805) 788-6602. Phone requests made before midnight can be scheduled for the next workday..

last verified April 2026 source San Luis Obispo County Department of Planning & Building ↗ entry id permits/california/san-luis-obispo/unincorporated

Report a correction

Educational reference. Permit rules and fees change — confirm current requirements directly with San Luis Obispo County Department of Planning & Building before applying. Jaspector is not legal advice.

Unincorporated San Luis Obispo County