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The Department of Planning and Building Permit Center is closed to the public until further notice. Many services are available virtually. Please refer to our website for more information.  

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Interactive Maps (Land Use View)

Our interactive Land Use View mapping application can be used to look up property information by assessor parcel number (APN), plan or permit number, or address.

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Online Services (CSS)

The County of San Luis Obispo provides online services through our Citizen Self-Service (CSS) Permit Portal to submit building permit and planning applications, request a building inspection, research permits and property information, and to pay fees.

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Building Forms & Documents > Onsite Wastewater Treatment Systems (Septic Systems)

Name Description Type
BLD-3028-04212020-Digital-Submittal-for-Onsite-Wastewater-Treatment-Systems-Requiring-Corrective-Act Instructions for submitting permit for septic repairs File
County-of-San-Luis-Obispo_LAMP_2020 Onsite Wastewater Treatment Systems Local Agency Management Program 2020 File
Countywide Rainfall Coverage Map Applicants reference this map to determine minimum parcel size for subdivision of parcels served by onsite wastewater treatments systems (OWTS) File
Existing Septic Verification Form Property owners and qualified professionals use this form to report the capacity and condition of the existing septic system (OWTS) to the County. (Form BLD-1019). File
Homeowner Guide to Septic Systems (English) Information for homeowners on proper operation and maintenance of residential septic systems (OWTS-English). File
Homeowner Guide to Septic Systems (Español) Information for homeowners on proper operation and maintenance of residential septic systems (OWTS-Español). File
LAMP Executive Summary 2017 This is a summary of the County's Proposed Local Agency Management Program (LAMP) for Onsite Wastewater Treatment Systems. File
LAMP FAQs Document A list of the most frequently asked questions regarding the Local Agency Management Program for Onsite Wastewater Treatment Systems (BLD-2026) File
Permitted Liquid Waste Haulers Reference list of permitted liquid waste haulers (Form BLD-2027). To be added to the list, email [email protected] and provide a copy of the permit issued by the County of SLO Environmental Health Department. File
Septic Dos and Don’ts (English) Informational tips for property owners on prolonging the functionality of septic systems (OWTS-English). File
Septic Dos and Don’ts (Español) Informational tips for property owners on prolonging the functionality of septic systems (OWTS-Español). File
Septic Tank Inspection Report Qualified professionals use this form to report the results of septic system (OWTS) inspections to property owners and the County. (Form BLD-1030). File
SLO-County-PROPOSED-FINAL-LAMP_Web-Version_122817 File
State OWTS Policy State of California policy regulating Onsite Wastewater Treatment Systems (OWTS Policy) File
Top 10 Ways to be a Good Septic Owner 10 Tips for property owners to follow for maintaining septic systems (OWTS) in optimal condition from the EPA. File
Criteria for Onsite Wastewater Treatment Systems Applicants reference these standards to determine the permitting authority for construction or repair of onsite wastewater treatment systems. (BLD-2028) File
Washing Machine Greywater Disposal Guide Guidelines for establishing an outdoor greywater disposal system for single family residential washing machines. (Form BLD-2008) File

Interactive Maps (Land Use View)

Our interactive Land Use View mapping application can be used to look up property information by assessor parcel number (APN), plan or permit number, or address.

Launch Land Use View Application


Online Services (CSS)

The County of San Luis Obispo provides online services through our Citizen Self-Service (CSS) Permit Portal to submit building permit and planning applications, request a building inspection, research permits and property information, and to pay fees.

Launch CSS