Bolthole Index

Lake County, California

Building permits, zoning and land rules in Clearlake, California

Clearlake, California handles building permits through the city Building Department’s online portal and applies its own zoning inside city limits.12 New septic systems and wells go to Lake County Environmental Health, rather than the city building counter.1 Clearlake allows a micro primary dwelling of 400–749 square feet with an administrative use permit, but we could not confirm RV occupancy on private land; ask city Planning before buying for that purpose.34

At a glance

Building permits
City Building Department; applications accepted only online1
Zoning
Clearlake zoning applies inside city limits2
Septic and wells
Lake County Environmental Health; city directs new systems to that office15
RV living
Not confirmed; ask Clearlake Planning about the proposed occupancy4
Small primary homes
750 square feet normally; 400–749 square feet with an administrative use permit3
LDR lot size
Minimum lot area 5,000 square feet in LDR; other dimensions also apply6
Owner-builder
Owner sets up the portal and submits; state insurance and workers compensation requirements apply1

Who to call

Building permits

Clearlake Building Department

City building permit applications, plan review and building inspections; directs new wells and septic systems to Lake County Environmental Health

(707) 994-8201 Ext 104

14050 Olympic Drive Clearlake, CA 95422

Online permits →

Zoning

Clearlake Planning Department

City zoning inquiries, development proposal review and discretionary use permits

(707) 994-8201

14050 Olympic Drive Clearlake, CA 95422

Septic permits

Lake County Environmental Health

County onsite wastewater and private well program; arrange site evaluation and well permitting with Environmental Health

707-263-1164

[email protected]

922 Bevins Court Lakeport CA 95453

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in Clearlake means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Clearlake, CA?

For a new home or remodel in Clearlake, start with the city Building Department: the city identifies building permit fees for those projects and accepts building permit applications only through its online portal.1 A property owner, architect or licensed contractor can submit the application; mailed, emailed and counter submissions are not accepted.1 A computer in the city lobby is available for applications.1 Clearlake determines the building permit cost after submission and review, so ask for a project-specific cost breakdown rather than budgeting from Lake County’s building fee schedule.1

Who handles Clearlake building inspections and owner-builder applications?

Clearlake’s Building Department handles city building permit applications and plan review, and building inspection requests go through the same portal.1 Reach the building counter at (707) 994-8201 Ext 104; the city lists its address as 14050 Olympic Drive Clearlake, CA 95422.1 Keep a stamped, printed copy of the approved plans on site for the inspector.1 An owner-builder sets up the online portal and submits the application as the owner; hiring contractors still requires compliance with applicable California workers compensation and insurance requirements.1 Owner-builder submission therefore follows the city application process rather than bypassing building permit review.1

Does Clearlake have zoning, minimum lot sizes and setbacks?

Clearlake has its own zoning regulations, and the official zoning map assigns land inside city limits to a district.27 Ask Clearlake Planning to identify the parcel’s district before choosing a house layout; the department handles zoning inquiries and discretionary use permits.4 In Clearlake’s LDR district, standard lots have a minimum area of 5,000 square feet, width of 50 feet, depth of 90 feet and street frontage of 20 feet.6 LDR also has yard standards; ask Planning to confirm the applicable setbacks for the proposed layout.84 The LDR dimensions describe that district, so use the parcel’s mapped district rather than assuming the same dimensions throughout Clearlake.67

How do septic permits and wells work inside Clearlake?

Clearlake’s Building Department directs new septic systems and wells to Lake County Environmental Health, while public water and sewer hookups go to the corresponding water provider and Special Districts.1 Lake County Environmental Health requires a site evaluation and parcel approval for sewage disposal before a standard or alternative septic system permit application can be submitted.9 Lake County Sanitation District lists Clearlake among its wastewater service areas; confirm the parcel’s sewer service before committing to a septic design.10 Lake County Environmental Health also permits and inspects private wells under the county code.11 Call Environmental Health at 707-263-1164 to arrange assistance; inspector assistance is by appointment.12

Can you live in an RV or tiny home on Clearlake land?

We could not confirm whether Clearlake allows an RV as a dwelling on a private lot, including during house construction; ask Clearlake Planning about the intended occupancy before buying an RV for that purpose.4 Clearlake does provide a specific path for a small primary dwelling: a home of 400–749 square feet may be approved in a residential district with an administrative use permit.3 The normal minimum for a detached single-family home, including a manufactured home, is 750 square feet, excluding garages and carports.3 Manufactured homes are allowed uses in RR and LDR, but the dwelling-size requirements still apply.133 Ask Planning which dwelling category and approval path fit the proposed unit.4

Building a home in Clearlake: what are the steps in order?

Use the city’s building application sequence, with zoning and wastewater decisions addressed before committing to a design.149

  1. Ask Clearlake Planning to confirm the zoning district and proposed use; request an appointment through the Planning Department.47
  2. Confirm water and sewer service with the corresponding providers; for a new septic system, arrange Lake County Environmental Health’s site evaluation before submitting the septic permit application.19
  3. Submit the building permit application through Clearlake’s portal and pay the requested fees; payment precedes plan review.1
  4. Respond to any corrections and submit revised plans for review; after approval, print the building permit and begin work.1
  5. Keep approved plans on site and request building inspections through the portal.1

For land outside city limits, consult the Lake County guide: the county administers zoning in unincorporated Lake County.14

Watch-outs

  • Clearlake’s 400–749-square-foot micro primary dwelling path requires an administrative use permit; small size alone does not authorize occupancy.3
  • We could not confirm Clearlake’s temporary camping or RV dwelling rules; ask city Planning before planning to stay on a vacant lot.4
  • Clearlake building permit costs depend on the submitted project, and the city reviews the submission before providing an accurate cost breakdown.1
  • We could not confirm Clearlake’s parcel-specific floodplain and driveway approval requirements; ask city Building and Planning to identify the approvals needed before finalizing the site plan.14

Sources

  1. Clearlake Building Department (clearlake.ca.us)
  2. Chapter XVIII Zoning Regulations (Clearlake), quoted and re-checked
  3. Residential, Agricultural and Institutional Uses Allowed by Zones (Clearlake), quoted and re-checked
  4. Clearlake Planning Department (clearlake.ca.us)
  5. Environmental Health | Lake County, CA, quoted and re-checked
  6. clearlake.ca.us (Clearlake), quoted and re-checked
  7. Chapter XVIII Zoning Regulations (Clearlake), quoted and re-checked
  8. 18-4.020 Property Development Standards (Clearlake), quoted and re-checked
  9. Land Development | Lake County, CA, quoted and re-checked
  10. Design and Construction Standards for Lacosan, quoted and re-checked
  11. lakecountyca.gov, quoted and re-checked
  12. Lake County Environmental Health (lakecountyca.gov)
  13. Residential, Agricultural and Institutional Uses Allowed by Zones (Clearlake), quoted and re-checked
  14. Zoning Ordinance, quoted and re-checked

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Clearlake

Clearlake’s own rules

  • Local zoningPresent

    Land inside Clearlake city limits; the city adopts Chapter XVIII Zoning Regulations and establishes zoning districts.

    “The City of Clearlake is divided into the 9 base zoning districts that are established by Table 1.”
  • Zoning districtsPublished

    Zoning districts inside Clearlake city limits, including RR and LDR.

    • The code page states that the zoning map is part of the zoning regulations; parcel-specific district assignment was not determined.
    “All areas within the City shall be designated within a zoning district. The official Zoning Map, which shall depict all duly adopted zoning districts, is as much a part of these regulations as if it were fully contained in this document.”
  • Minimum dwelling sizeSpecified

    Single-family detached dwellings, including manufactured homes, in Clearlake residential zoning districts.

    • The 750-square-foot minimum excludes garages and carports.
    • A micro primary dwelling of 400 to 749 square feet may be approved in any residential zoning district with an administrative use permit.
    • Duplexes, townhomes, and multiplex/multiple-family dwellings must have at least 450 square feet of floor area.
    • Accessory and junior accessory dwellings are subject to the separate Section 18-19.320 rules.

    minimum floor area: >= 750 square feet (single-family detached dwellings, including manufactured homes; exclusive of garages and carports) · micro primary dwelling floor area: 400–749 square feet (requires administrative use permit) · minimum multifamily floor area: >= 450 square feet (duplexes, townhomes, and multiplex/multiple-family dwellings)

    “Except as required for Accessory and Junior Accessory Dwellings, per Section 18-19.320 single-family detached dwellings, including manufactured homes, shall have a minimum 750 square feet floor area (exclusive of garages and carports), [...] A primary dwelling unit size from 400 to 749 square feet (micro primary dwelling) may be approved in any residential zoning district with approval of an administrative use permit. Duplexes, townhomes, and multiplex/multiple family dwellings shall have a minimum 450 square feet of floor area.”
  • Minimum lot sizeSpecified

    LDR Zone inside Clearlake city limits.

    • The section also specifies minimum lot width, depth, and street frontage.

    minimum lot area: >= 5000 square feet · minimum lot width: >= 50 feet · minimum lot depth: >= 90 feet · minimum street frontage: >= 20 feet

    “Standard lot dimensions: 1. Minimum lot area: 5,000 square feet 2. Minimum lot width: 50 feet 3. Minimum lot depth: 90 feet 4. Minimum street frontage: 20 feet”
  • SetbacksSpecified

    LDR Zone inside Clearlake city limits.

    • Section 18-4.020 directs applicants to Section 18-20.040 for yard standards; the numeric yard standards were not fully captured in the opened page.
    “LDR 20 feet [...] Table 14. Minimum Other Yards In RR, LDR, MDR, and HDR Zones Rear Yard Side Yard 10’ 5’”
  • Manufactured homesAllowed

    Manufactured homes in the RR and LDR residential zones inside Clearlake city limits.

    “P=Use Allowed; [...] RR &LDR MDR HDR GC CD MUX IN O [...] Manufactured Home (F see below) P P CU CU AU AU CU P”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Clearlake or Lake County directly.

  • Building permit — Building permits inside Clearlake city limits.
  • Owner-builder exemption — Owner-builders performing construction inside Clearlake city limits.
  • Inspections — Building inspections inside Clearlake city limits.
  • Certificate of occupancy — Certificates of occupancy inside Clearlake city limits.
  • Living in an RV — Use of a recreational vehicle as a dwelling unit on land inside Clearlake city limits.
14 more unanswered
  • Camping on your land
  • Tiny homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit fees
  • Permit process

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Clearlake publishes no rule on the point, not that none exists. Lake County’s page lists the county offices to call.

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