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Permit Numbering Information

Below is sortable table, updated August 8, 2018, listing all the permit types and their numbering formats used by Permit Sonoma past and present. It is intended as historical listing to assist in research of started permits, particularly permits listed for properties in the Permit History Lookup.

Permit Sonoma processes many types of applications and permits. As of July 1, 1999, the first three characters of the file number indicate Permit Type. A variety of numbering formats were used on historical files which can be found in the Permit Sonoma permitting system.

Permit Number Formats Explained

Permit Number Format: LLLxx-xxxx

An alphanumeric value. The three letter permit type code, then the last two digits of the calendar year the file was created, a hyphen, followed by an ascending numeric value. Used for all files created on and after July 1, 1999.

Example: BLD08-0010

This is a Building permit, created in the calendar year 2008, and is the 10th file of its type for that year.

Permit Number Format: xxxxxxx

A numeric value, most often associated with a historical file. Many historical files were created in systems which did not accommodate current numbering.

↓↑ Sort Column Alphabetically or Numerically: Select the column title of the column you want to sort. This is helpful if you want to display the list in order by a specific column.

Number FormatPermit TypeDescriptionCurrently UsedDepartment/ Division
xxxxxx-BHistorical - Building, Grading and/or Violation File created in a legacy computer system prior to July 1, 1995. These files can represent a building permit, grading permit and/or allegations of code violation.No
xxxxxx-MHistorical - Building, Grading and/or Violation File created in a legacy computer system prior to July 1, 1995. These files can represent a building permit, grading permit and/or allegations of code violation.No
xxxxxx-SHistorical - Building, Grading and/or Violation File created in a legacy computer system prior to July 1, 1995. These files can represent a building permit, grading permit and/or allegations of code violation.No
xxxxxx-GHistorical - Building, Grading and/or Violation File created in a legacy computer system prior to July 1, 1995. These files can represent a building permit, grading permit and/or allegations of code violation.No
xx-xxxxxHistorical - Building, Grading and/or Violation File created in a legacy computer system prior to July 1, 1995. These files can represent a building permit, grading permit and/or allegations of code violation.No
A-xxxxxxHistorical - Building Permit Created prior to 1974.NoBuilding
ACCxx-xxxxCertificate of Compliance - AdministrativeAdministrative Certificates of Compliance (ACC) are issued by the County to properties that have been proven to be separate legal parcels. The ACC only gives the owner the right to sell, lease or finance the parcel separately from other contiguous parcels held by the same owner.YesPlanning
ACOxx-xxxxErosion Control Tracks Vineyard/Orchard planting/replanting applications processed by the Sonoma County Agricultural Commissioner.YesAgricultural Commissioner
ADAxx-xxxxAdministrative Appeal of Zoning InterpretationTracks an appeal of any decision or determination made by planning staff.NoPlanning
ADDxx-xxxxAddressingAddress or road name assignment.YesCustomer Service
ADRxx-xxxxDesign Review - AdministrativeAdministrative Design Review for proposed structures in designated scenic areas and new uses to minimize their visual impacts.YesPlanning
AEXxx-xxxxAgricultural ExemptionBuilding permit exemption for a structure designated for agricultural uses only. Created on or after July 5, 1995.YesBuilding
AFMxx-xxxxAgricultural Frost Management Tracks Agricultural Frost Management applications processed by the Sonoma County Agricultural Commissioner.YesAgricultural Commissioner
AGPxx-xxxxAgricultural Preserve (Williamson Act)County and owners of agricultural and open space land voluntarily enter into agreements that restrict the owner’s use of the land to agriculture. Establishes and tracks Williamson Act Contracts. These contracts legally restrict the use of the land to an agricultural use for a minimum of 10 years.YesPlanning
ANNEX-xxxxHistorical Annexation Tracks the annexation of a parcel into the jurisdiction of an incorporated city.No
ANXxx-xxxxAnnexation Tracks the annexation of a parcel into the jurisdiction of an incorporated city.Yes
B-xxxxxxHistorical - Building, Grading or Demolition Permit Created prior to July 1, 1999. NoBuilding
BLDxx-xxxxBuilding Permit
Please visit our office to fill out a printed version of this form.
A building permit is an official approval to proceed with a construction project. Unless otherwise exempt, a building permit is required to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by the building code, or to cause any such work to be performed. Created on or after July 1, 1999.YesBuilding
BLDxx-xxxxSolar Photovoltaic Residential RooftopResidential rooftop solar photovoltaic (PV) projects 10 kW in size or smaller.YesBuilding
BLDxx-xxxxSolar Photovoltaic (PV) Systems

Solar photovoltaic (PV) projects:

  • Residential ground mounted
  • Commercial rooftop
  • Commercial ground mounted
YesBuilding
BLDxx-xxxxSolar Thermal Systems

Solar thermal projects:

  • Residential rooftop
  • Residential ground mounted
  • Commercial rooftop
  • Commercial ground mounted
YesBuilding
BSRxx-xxxxSite EvaluationBuilding Site Evaluations include:
  • Accessibility Site Review
  • Building Construction site review
  • Fire damaged structures (Property Reports)
YesBuilding or Septic
CCCxx-xxxxCertificate of Compliance - ConditionalAllows a person to apply for a determination as to whether a division of land complied with State and Local laws in effect at the time of the division.YesPlanning
CMOxx-xxxxCertificate of ModificationModifications can be made to recorded a parcel map (Minor Subdivision) or a final map (Major Subdivision) through the Certificate of Modification procedure. Typical modifications to recorded maps include changes to agency notes upon the maps, relocation or removal of easements, and relocation or enlargement of building envelopes.YesPlanning
CPHxx-xxxxCoastal Permit - With HearingCoastal permits are required for development on parcels located within the Coastal Zone. Coastal permits are processed either administratively without a hearing, or with a public hearing, typically by the Board of Zoning Adjustments.YesPlanning
CPNxx-xxxxCoastal Permit - No HearingCoastal permits are required for development on parcels located within the Coastal Zone. Coastal permits are processed either administratively without a hearing, or with a public hearing, typically by the Board of Zoning Adjustments.YesPlanning
D-xxxxxxHistorical - Building Permit Exemption Building permit exemption created prior to July 5, 1995 for a structure designated for agricultural uses only.NoBuilding
DEMxx-xxxxDemolition PermitA demolition permit is required to demolish a building or structure in whole or in part. Some demolition permits may be included within a building permit application, especially for portions of structures. Created on or after July 1, 1999.YesBuilding
DRHxx-xxxxDesign Review - With HearingThe Design Review Committee (DRC) reviews and approves the design of significant new development projects, such as new commercial development.YesPlanning
DRNxx-xxxxDrainage PermitA drainage permit is required prior to commencing any drainage improvement or related work, including preparatory site clearing and soil disturbance, except where exempted from permit requirements in Sonoma County Code section 11.06.010. Created on or after July 1, 2004.YesEngineering
DUAxx-xxxxPlanning - Dwelling Unit Allotment Tracks the number of single family dwellings in the Sebastopol and Sonoma Valley planning areas. NoPlanning
E-xxxxxxHistorical - Electrical Permit Created prior to 1982.NoBuilding
ENCxx-xxxxEncroachmentWork within the County maintained road or right-of-way, such as upgrading or paving a driveway, installing utilities, drainage, landscaping and mailbox structures, requires an encroachment permit.YesEngineering
ENPxx-xxxxEngineering ProjectTracks multiple engineering permits or activities related to a project.YesEngineering
ESRxx-xxxxEngineering Site ReviewField or Office site evaluation related to Engineering permits or activities.YesEngineering
FLD-xxxxx Rapid Evaluation Safety AssessmentTracks information about a structure which has been affected by a flood or other storm or natural disaster damage.YesBuilding
GPAxx-xxxxGeneral Plan - AmendmentIn order to amend a General Plan land use policy, designation or density on a parcel, an application must be made for a General Plan amendment.YesPlanning
GRDxx-xxxxGradingGrading is the removal or deposition of earth material by artificial means. Common examples of grading include, but are not limited to, construction of driveways, building pads, site improvements or reservoirs, and restoration/stabilization of hillsides, slopes or stream banks.Created on or after July 1, 1999.YesEngineering
GYWxx-xxxxNon-Potable Systems - Gray WaterGraywater is wastewater collected from showers, bathtubs, bathroom sinks, and clothes washing machines. Graywater does not include water from toilets, kitchen sinks, or dishwashers.YesWell and Septic
I-xxxxxxHistorical - Trailer or Mobile Home Permit Created prior to July 5, 1995.Building
ICCxx-xxxxHistorical - In-Channel Construction Permit Required when a waterway was disturbed by construction activity (in compliance with Ordinance 1108).NoEngineering
LCCxx-xxxxLand Conservation Contract - Establishment, Replacement, NonRenewalThe California Land Conservation Act allows the County and owners of agricultural and open space land to voluntarily enter into agreements that restrict the owner’s use of the land to agricultural and/or open space uses and uses compatible with those agricultural and/or open space uses, in exchange for a reduction in property tax assessment.YesPlanning
LIDxx-xxxxLow Impact DevelopmentPermit to monitor and inspect post-construction storm water best management practices.YesEngineering
LLAxx-xxxxLot Line AdjustmentA Lot Line Adjustment (LLA) is a realignment of boundary lines between two to four existing legal parcels (per Section 66412 of the Subdivision Map Act), where the land taken from one parcel is added to an adjacent parcel. This process is undertaken when the owner(s) of adjacent lots or parcels desire to change the shape, size, and/or location of the parcels.YesPlanning
MJSxx-xxxxSubdivision - MajorA major subdivision is a division of land into five or more parcels. Major subdivisions are governed by the Subdivision Map Act, the Sonoma County Subdivision Ordinance, the Sonoma County Zoning Code and the Sonoma County General Plan.YesPlanning
MNSxx-xxxxSubdivision - MinorA minor subdivision is a division of land into four or fewer parcels. Minor subdivisions are governed by the Subdivision Map Act, the Sonoma County Subdivision Ordinance, the Sonoma County Zoning Code and the Sonoma County General Plan. Minor subdivision application are also known as tentative parcel maps.YesPlanning
MSCxx-xxxxMiscellaneous Sales / Fees Used for map sales, copy charges and minor requests when no other file type is applicable.No
OPRxx-xxxxOperational PermitPermit required for operation of non-standard Onsite Wastewater Treatment Systems (OWTS).YesWell and Septic
ORD-xxxxOrdinance - Board of Supervisors Tracks the map associated with a zoning district change approved by the Board of Supervisors.NoPlanning
ORDxx-xxxxOrdinance Determination and Appeals of Staff DecisionsOrdinance - Board of Supervisors
Tracks the map associated with a zoning district change approved by the Board of Supervisors. Tracks requests for waiver of covered parking requirements and complex
determinations on legal non-conforming status of buildings or uses.
YesPlanning
P-xxxxxxHistorical - Plumbing Permit Created prior to 1980.NoBuilding
PLPxx-xxxxPlanning - Concurrent Processing Project Tracks multiple planning files on the same parcel which are being processed.YesPlanning
PRExx-xxxxPre-Application Meeting Tracks pre-application meetings.Yes
PMRProperty Manager CertificationA property manager who is certified by Permit Sonoma is required for all vacation rentals.YesPlanning
PXxxxxxxHistorical - Building Plan Check Created prior to July 5, 1995.NoBuilding
R/S xx-xxxRecord of Survey Tracks the plan check of a Record of Survey created by a licensed landNoEngineering
RNCxx-xxxxAddress / Road Name Assignment Tracks an address change or road name assignment process.Yes
ROIxx-xxxxRoilingRequired when a natural waterway will be disturbed by construction activity.YesEngineering
ROSxx-xxxxRecord of SurveyA Record of Survey is an official map that is reviewed by the surveyor. This map represents a survey made on the round and delineates deed described lines, or lines related to survey control.YesEngineering
RWVxx-xxxxRight of Way VacationA permit to request approval to vacate a portion of public right-of-way.YesEngineering
S-xxxxxx Historical - Septic System Permit Created prior to July 5, 1995.NoWell and Septic
SB-547-xxxUnreinforced Masonry StructureTracks information about unreinforced masonry structure in accordance with Senate Bill 547.YesBuilding
SEPxx-xxxx SepticIn areas where public sewer is not available, homeowners must have septic systems installed on their property that will treat wastewater coming from their home. Tracks the plan check and construction of a septic system. This type of file can also refer to the evaluation of an existing septic system. YesWell and Septic
SEVxx-xxxxSite Evaluation / Flood Zone DeterminationUsed for a building or septic permit site evaluation or a flood zone.NoBuilding or Septic
SEWxx-xxxxSewer - Construction; Engineering, Sewer, Construction, SewerA sanitary sewer inspection permit is required for any sewer work performed, including but not limited to, connection to a house, a commercial building, or apartments. The work must be inspected and approved before occupancy, and/or use of the sewer is allowed. Perits are also issued for construction of sewer facilities and annexation into sanitation Districts or Zones, or Outside Service Area Agreements for sewer service with sanitation Districts or Zones.YesEngineering
SOIL-xxxxxGeotechnical InvestigationCalifornia Building Code outlines specific instances of when a geotechnical report is required based on soil conditions and construction methods.YesBuilding
SPAxx-xxxxSpecific Plan - AmendmentIn order to amend a specific plan's land use policy, designation or density on a parcel, an application must be made for a Specific Plan amendment.YesPlanning
SPExx-xxxxSpecial EventSpecial Events that are expected to cause road closures in unincorporated Sonoma County require an encroachment permit. Allows a public event to be held in a public right of way.YesEngineering
SRWP-xxxxxSanta Rosa Wastewater Pipeline Project file used to track Geotechnical Exploration WellsNo
SURxx-xxxxSurveyor / Land DevelopmentTracks various survey or land development activities such subdivision maps, improvement plans, corner records, and right-of-way vacations.YesEngineering
T-xxxxxx Historical - Temporary Utility/Occupancy Permit Created prior to July 1, 1999.NoBuilding
TEMxx-xxxxTemporary Occupancy, Temporary Structures, Temporary Utilities

Occupancy: Occupancy of a permitted structure under construction prior to permit final.
Structures: A permit may be issued for temporary structures and temporary uses. Such permits are be limited as to time of service (less than 180 days unless an extension is granted for demonstrated cause).
Utilities: A temporary permit for utilities for a permitted structure prior to the permit final.
Created on or after July 1, 1999.

YesBuilding
THRxx-xxxxTransient Rentals - Hosted RentalHosted rentals are the rental of a single room or sleeping area within a single-family dwelling, where the property owner remains in residence. Created on or after September 1, 2017. Hosted rentals previous to September 1, 2017 are under the ZPE category.YesPlanning
TRNxx-xxxxTransportationA transportation permit is required anytime a vehicle and/or load exceeds the California Vehicle Code legal dimensions on roads in unincorporated Sonoma County.YesEngineering
TVRxx-xxxxTransient Rentals - Vacation RentalVacation rentals are the rental of a private residence for periods of 30 days or less. Created on or after September 1, 2017. Vacation rentals previous to September 1, 2017 are under the ZPE category.YesPlanning
UPCxx-xxxxCannabis - Use PermitPermits for cannabis cultivation, dispensaries, distribution & transportation, manufacturing, nurseries, and testing labs. Created on or after September 1, 2017.YesPlanning
UPExx-xxxxUse PermitA Use Permit application is required for development projects that are typically more intensive than Permitted Uses. These also include Minor Live/Work and Small-Scale Agricultural Processing.YesPlanning
V-xxxxxHistorical - Code Enforcement Violation / Complaint Tracks an allegation of a code violation.NoCode Enforcement
VARxx-xxxxVarianceA variance may be granted to provide relief from specific numerical standards in the zoning code such as setback requirements from property lines. Variances cannot be granted for relief from “use” provisions in the zoning code. If a proposed use is not permitted in a given zoning district, a variance cannot be granted to allow it.YesPlanning
VBUxx-xxxx Code Enforcement Violation - Building Tracks an allegation of building or housing code violation(s).YesCode Enforcement
VESxx-xxxxSeptic - Vesting CertificateA transferable certificate providing a right to construct a septic system for an approved site, designated system type, and stated capacity for a limited period of time.YesWell and Septic
VGRxx-xxxx Code Enforcement Violation - Grading Tracks an allegation of grading code violation(s).YesCode Enforcement
VMxx-xxxxHistoric Voluntary Merger Tracks requests to eliminate property lines between parcels under the same ownership.NoPlanning
VMGxx-xxxxVoluntary MergerRequests to eliminate property lines between parcels under the same ownershipYesPlanning
VPLxx-xxxxCode Enforcement Violation - Planning / Zoning Tracks an allegation of planning/zoning code violation(s).YesCode Enforcement
VWSxx-xxxxCode Enforcement Violation - Well and/or Septic Tracks an allegation of a failed septic system or contaminated well.YesCode Enforcement
WATxx-xxxxWater PermitWater System Permit
Tracks the plan check and/or construction inspections(s) of a water system that serves two or more parcels.
YesEngineering
WELxx-xxxxWater WellWell permits are required to drill, abandon, or deepen wells and can only be issued to C-57 Well Drilling Contractors. Also for pump test permit.YesWell and Septic
WP J-xxSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project.No
WP L-xxSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project.No
WP MB-xxSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project. No
WB MC-xxSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project.No
WP MNB-xxxSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project.No
WP NB-xxSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project.No
WP SB-xxSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project.No
WP SC-xSanta Rosa Wastewater Pipeline Tracks geotechnical borings related to the Geysers Pipeline project.No
WSRxx-xxxxWell & Septic Site ReviewField or Office site evaluation related to Well & Septic permits or activities.YesWell and Septic
ZCExx-xxxxZone Change - AmendmentA Zone Change can be proposed to change from one zoning district to another, to change the zoning density on a property, to remove a combining district, or to amend the text of the Sonoma County Zoning Code.YesPlanning
ZPCxx-xxxxCannabis - Zoning PermitPermits for cannabis cultivation. Created on or after September 1, 2017.YesPlanning
ZPExx-xxxxZoning Permit

Planning permits such as zoning permits may be required prior to the issuance of a building permit. Zoning clearances are required for building permits issued for new buildings, structures, or additions to existing buildings or structures. There may be additional setback requirements for a building depending upon the location near a scenic roadway or waterway. Additional review, such as administrative design review, may be required prior to the issuance of a building permit. Permits include but are not limited to the following:

YesPlanning

Glossary of Table Header Terms

Number Format
Past and current numbering formats for permits or records.
Permit Type
The type of permit or record.
Description
An explanation of the Permit Type that describes the type of project for which a permit or record was/is created.
Currently Used
Denotes whether or not a numbering format is currently used on new permits and records. "No" is a historical record.
Department/Division
The Permit Sonoma division responsible for creating the permit or record type listed. The Agricultural Commissioner, which is a department separate from Permit Sonoma, also creates permit/record types.