Local zoning · Clearlake

Clearlake — Development Standards

Development Standards under the Clearlake local zoning and planning code, with the controlling citations.

Last reviewed: July 6, 2026

Overview

Clearlake’s zoning standards live in Chapter XVIII, Zoning Regulations, of the Clearlake Municipal Code. Most “what can I build” rules appear directly in each base district (RR, LDR, MDR, HDR, MUX, DC, GC, IN, O) and are supplemented by citywide standards for yards/setbacks, coverage, height, fences, and related items in Article 18-20. Combining/overlay districts (AV, SP, SC, PD) can further modify baseline rules for specific areas or projects. See the Clearlake Zoning and Clearlake Land Use pages for a broader map-based orientation.

Key rule of thumb: In Clearlake’s residential districts, the minimum “other yards” are generally a 5 ft side yard and a 10 ft rear yard, with street yards governed by block/context rules and limited administrative reductions; never assume a fixed “front setback” without checking § 18-20.040 tables and notes.

Citywide development standards you’ll apply in every zone

Yards/setbacks (§ 18-20.040)
- Residential “other yards” minimums: side yard 5 ft, rear yard 10 ft (exceptions for ADUs noted below) per Table 14. For MUX/GC/IN, “other yards” follow the standards of the adjacent lot’s zone, per Table 15.
- Street yards (front setbacks) are context-based:
  - In built-up blocks, the minimum required street yard is the average of existing street yards on at least half the lots, but not less than 10 ft. Corner-lot street yards in RR/LDR (and certain LDR/MDR cross-street cases) must be at least 10 ft on the longer frontage. Administrative reductions can allow street yards as low as 10 ft if standards are met (driveways must keep an 18 ft vehicle space clear to avoid sidewalk overhang).
- What can occupy yards: Tables 16–17 regulate prohibited and permitted encroachments (e.g., limits on front-yard paving to 50%; controls on eaves, decks, AC units; encroachment permits for any projection into right-of-way).
Coverage (§ 18-20.050): Coverage is the lot area covered by structures and specified features; each zone sets its maximum, with potential exceptions for public assembly/institutional uses via use permit.
Height (§ 18-20.060): Heights are measured from average ground to roof topmost point; Table 19 supplies zone-by-zone maximums, with limited allowances (e.g., +10 ft for solar equipment, chimneys, etc.).
Fences and hedges (§ 18-20.070): Street-yard fence heights are limited per Figure 9; elsewhere 6 ft typical, with defined methods for measuring on slopes/retaining walls; exceptions may be granted by the Director.
Density and cross-slope (§ 18-20.020 method; Table 12): Net site area and average cross-slope can cap the allowed density in RR/LDR/MDR/HDR; MUX/DC/GC/IN are not slope-reduced. Footnote confirms ADUs/JADUs are excluded from maximum density.
Parking references: Use § 18-20.090 and the dedicated Clearlake Parking page for space ratios and yard/driveway interface rules; several yard tables cross-reference parking encroachments.

ADU note. City tables for “other yards” explicitly carve out ADUs/JADUs per § 18-19.320, and city density tables confirm ADUs are not counted toward maximum density; see local ADU rules and state protections on the Clearlake ADUs page.

District-by-district development standards (purpose, where applied, typical uses, key dimensions)

RR — Rural Residential (§ 18-3)

Purpose/where: Very low-density residential; applied to “low density residential” areas on the General Plan Zoning Map.
Typical uses: Large-lot single-family and rural residential activities consistent with low-intensity living.
Key standards: The RR district sets a maximum density of 1 du/net acre and a minimum lot size of 1.25 acres. Height and yards reference citywide tables. Parking per § 18-20.090.
Other yards: Apply § 18-20.040 (side 5 ft, rear 10 ft).

LDR — Low Density Residential (§ 18-4)

Purpose/where: Single-family neighborhoods with private open space; applied to “low density residential” areas.
Typical uses: Detached single-family with compatible residential accessories.
Key standards: Max density 8 du/net acre; max coverage 40%; minimum lot area/width/depth/frontage: 5,000 sf / 50 ft / 90 ft / 20 ft; citywide yards/height rules apply; parking per § 18-20.090.
Other yards: Side 5 ft, rear 10 ft; street yards per § 18-20.040 (corner-lot minimum 10 ft on longer frontage; averaging allowed; admin reductions to 10 ft possible).

MDR — Medium Density Residential (§ 18-5)

Purpose/where: Smaller-household and group housing near commercial/public facilities; mapped to “medium and high density residential.”
Typical uses: Attached housing, multifamily, group living forms typical for MDR.
Key standards: Max density 15 du/net acre; max coverage 60%; minimum lot area 5,000 sf; citywide yards/height rules apply; parking per § 18-20.090.
Other yards: Side 5 ft, rear 10 ft; street yards per § 18-20.040 (averaging/10 ft minimum concepts apply).

HDR — High Density Residential (§ 18-6)

Purpose/where: Higher-density housing near employment/college concentrations; mapped to “High Density Residential.”
Typical uses: Multifamily and group housing forms at higher intensities.
Key standards: Max density 25 du/net acre; max coverage 60%; minimum lot area 5,000 sf; citywide yards/height; parking per § 18-20.090.
Other yards: Side 5 ft, rear 10 ft.

MUX — Mixed-Use (§ 18-7)

Purpose/where: Enables mixed residential/nonresidential on the same site; placed in areas suitable for vibrant, pedestrian-friendly multi-use development.
Typical uses: Residential over ground-floor commercial, live-work, mixed retail/office/housing.
Key standards: Max density 25 du/acre unless General Plan underlying designation is lower; height 35 ft (potentially up to 65 ft via DC/GC performance standards); max coverage 80%; min lot 3,000 sf; parking per § 18-20.090.
Other yards: As in the adjacent zone per § 18-20.040 Table 15.

DC — Downtown Commercial Mixed-Use (§ 18-8)

Purpose/where: Core downtown retail, service, entertainment, plus a variety of housing types. Applied within the City’s main commercial district.
Typical uses: Downtown commercial with upper-floor housing; pedestrian-oriented infill.
Key standards: Density up to 25 “density units”/acre; base height 35 ft with a performance path up to 65 ft (if housing included, parking frontage limited, and not on the lake side of Lakeshore Drive). Min lot 3,000 sf; parking per § 18-20.090 (no on-site guarantee for downtown residential).
Other yards: See § 18-20.040; Table 15 ties “other yards” to adjacent-zone standards in some commercial contexts.

GC — General Commercial (§ 18-9)

Purpose/where: Community/regional-serving commercial corridors.
Typical uses: Retail and services used by residents and visitors.
Key standards: No max density; height 35 ft by-right and up to 50 ft with a conditional use permit, but 35 ft max on the lake side of Lakeshore Drive; no maximum lot coverage; min lot 3,000 sf; parking per § 18-20.090.

IN — Industrial (§ 18-10)

Purpose/where: Wholesale, heavy commercial and light-manufacturing in enclosed buildings; sites that protect residents/environment through performance standards.
Typical uses: Manufacturing, assembly, storage uses suited to industrial districts.
Key standards: Height 35 ft (potential to go higher with a CUP); no maximum coverage; min lot 3,000 sf; parking per § 18-20.090.
Other yards: As in adjacent zone per § 18-20.040 Table 15.

O — Open Space (§ 18-11)

Purpose/where: Permanent open-space/park areas to manage risk and protect natural resources.
Typical uses: Parks, habitat/greenway, resource/open-space functions.
Key standards: Yard minimums are explicit in O: front 35 ft; side 15 ft (30 ft street side on corner); rear 20 ft (no rear yard setback where lots abut Clear Lake/Cache Creek). Minimum lot areas vary by ownership type.

AV — Avenue Combining District (§ 18-14)

Purpose/where: Applied to older “paper subdivisions” with substandard improvements; offers flexible standards to enable practical residential infill with basic access and fire protection.
Typical uses: Range from manufactured to single-family homes; some nonresidential also permitted per use tables.
Key standards: Max density 8 du/net acre; max coverage 60%; height 45 ft; min lot 5,000 sf (plus special water/sewer, fire access, and street-surfacing prerequisites).

SP — Specific Plan Combining Zone (§ 18-12)

Purpose/where: Implements an adopted specific plan; applied where the General Plan calls for a specific plan or one has been adopted.
Typical uses: As provided in the adopted specific plan.
Key standards: Density, height, yards, coverage, parking are those of the specific plan; if silent, the underlying zone controls.

SC — Scenic Corridor Combining District (§ 18-13)

Purpose/where: Preserves scenic quality adjacent to State Highway 53; applies to parcels within 300 ft of the highway right-of-way.
Typical uses: Same as base zone; overlay imposes additional siting/visual-mitigation constraints (e.g., siting transmission lines to avoid prominent views, minimize grading/cut-fill).

PD — Planned Development Overlay (§ 18-15)

Purpose/where: A flexible overlay (≥1 acre) tied to a specific project to adjust standards in exchange for superior design and site planning.
What it can change: With approvals, a PD may modify development standards (e.g., building height, floor area ratio, parcel size, parking, setbacks), while staying consistent with the General Plan and slope-based density limits in § 18-20.020.

Quick matrix of core dimensional standards by zone

Note: “Other yards” are side/rear minimums unless stated; street yards are context-based per § 18-20.040.

Zone	Typical max density	Max height (Table 19)	Max coverage	Other yards	Min lot area	Special notes	Code Reference
RR	1 du/net ac	35 ft; admin path up to 45 ft (citywide table)	Not specified in RR; see coverage rule	Side 5 ft; rear 10 ft	1.25 ac	Rural lots; street yards per § 18-20.040	§ 18-3.020; § 18-20.060; § 18-20.040
LDR	8 du/net ac	35 ft; admin path up to 45 ft (citywide table)	40%	Side 5 ft; rear 10 ft	5,000 sf (+50 ft width; 90 ft depth; 20 ft frontage)	Corner-lot longer frontage ≥10 ft	§ 18-4.020; § 18-20.060; § 18-20.040
MDR	15 du/net ac	35 ft (citywide table)	60%	Side 5 ft; rear 10 ft	5,000 sf	Street yards per § 18-20.040	§ 18-5.020; § 18-20.060; § 18-20.040
HDR	25 du/net ac	35 ft (citywide table)	60%	Side 5 ft; rear 10 ft	5,000 sf	Street yards per § 18-20.040	§ 18-6.020; § 18-20.060; § 18-20.040
MUX	25 du/ac (unless GP lower)	35 ft; up to 65 ft via DC/GC program	80%	Per adjacent zone	3,000 sf	Housing required for taller bldgs; frontage parking limits	§ 18-7.020
DC	25 density units/ac	35 ft; potential to 65 ft; 25 ft cap on lake side of Lakeshore Dr	Not specified	See § 18-20.040	3,000 sf	No guaranteed on-site parking for res; access limits	§ 18-8.020; § 18-20.060
GC	No max density	45 ft (CUP to 50 ft stated in § 18-9.020; 25 ft on lake side)	No max	Per adjacent zone	3,000 sf	Lakeshore Dr lakeside height cap	§ 18-9.020; § 18-20.060
IN	N/A	35 ft (CUP to exceed)	No max	Per adjacent zone	3,000 sf	Perf. standards control impacts	§ 18-10.020; § 18-20.060
O	N/A	N/A in table	N/A	Front 35 ft; Side 15 ft (30 ft street side); Rear 20 ft (none if abutting lake/creek)	Varies by ownership type	Open space/resource lands	§ 18-11.020
AV (combining)	8 du/net ac	45 ft	60%	§ 18-20.040	5,000 sf (plus water/sewer/fire/street standards)	For “paper subdivisions”	§ 18-14.030

Notes

Street yards are governed by § 18-20.040 context rules (averaging, corner-lot minimums, and discretionary reductions) rather than a single fixed distance per zone.
Table 12 density-slope reductions apply to RR/LDR/MDR/HDR; they do not reduce density in MUX/DC/GC/IN. ADUs/JADUs are excluded from max density per the table footnote.
For permitted signage and placement within yards, consult Clearlake Signage. Sign height is regulated in Article 18-21, as cross-referenced in § 18-20.060.

Practical coordination with related processes

Most new construction and site changes downtown and along corridors will trigger Clearlake Design Review. Development standards are the baseline; design review focuses on appearance and site planning under the adopted Design Review Manual.
Yard/height/coverage adjustments beyond what § 18-20 allows typically proceed via Clearlake Variances and Exceptions. Variances can relax yards, height, coverage, and parking, but not uses or density.
Nonconforming sites/structures must use Clearlake Nonconforming Uses procedures for alterations/expansions.
For scenic frontage near SH-53, also check Clearlake Overlay Districts (SC overlay) for grading and visual-mitigation standards.
Landscaping may be required in yards with approved plans; see Clearlake Landscaping and Screening.
Building safety and energy specifications are governed separately by the California Building Standards Code (Title 24) — not this page.

Checklist

Confirm base zone and any combining/overlay district on your parcel (RR, LDR, MDR, HDR, MUX, DC, GC, IN, O; AV, SP, SC, PD).
Establish allowable density using base zone cap and, where applicable, cross-slope/table method; exclude ADUs/JADUs from max density calculations.
Lay out building envelopes: apply § 18-20.040 yards (other yards per Tables 14–15; street yard averaging/corner-lot rules; check encroachment allowances).
Check height with § 18-20.060 Table 19 and any zone-specific performance paths (e.g., DC/MUX tall-building conditions; Lakeshore Drive lakeside caps).
Apply coverage limits (if any) in your district; note exceptions pathway for public assembly/institutional uses.
Confirm parking per § 18-20.090 and avoid front-yard paving over 50% (with limited exceptions).
If seeking relief beyond administrative reductions, evaluate PD overlay or a variance strategy.
If applicable, coordinate Clearlake Design Review and signage limits early.

Risks & Ambiguities

Issue	Why it matters	What to verify
Street yard (front setback) is not a single fixed number	§ 18-20.040 uses averaging, corner-lot rules, and admin reductions; misreading can push buildings too near/too far from the street	Document block conditions; confirm eligibility for averaging; get written confirmation if using administrative reductions to 10 ft.
Height references differ across sections	Some district text lists a numeric height, while Table 19 provides citywide maxima by zone and special Lakeshore Drive caps	Use § 18-20.060 Table 19 as the controlling matrix and flag any conflict during Clearlake Design Review.
“Other yards” for commercial/industrial near residential edges	In MUX/GC/IN, side/rear yards default to the adjacent zone’s standard	Identify actual adjacent zoning; apply the larger required yard where multiple zones abut.
“GC” vs “CG” label in consistency table	The Land Use/Zoning matrix references “CG,” while the district chapter uses “GC”	Treat the operative district as “GC” per § 18-9; note the matrix shorthand.
Downtown tall-building pathway	Going above 35 ft in DC/MUX carries conditions (housing required; storefront parking limits; not lake side of Lakeshore Dr)	Confirm project meets every listed performance standard before assuming >35 ft is approvable.
Cross-slope density math	Slope can reduce density in RR/LDR/MDR/HDR	Confirm “net area” and slope categories with the Director; MUX/DC/GC/IN are exempt from reductions.
ADUs and yards	Residential “other yards” exempt ADU/JADU rules; state law protects 4-ft side/rear for ADUs	Apply local § 18-19.320 and state ADU requirements; see California ADU law.

Plain-English Summary

Clearlake sets most numbers by zone (how many homes per acre, how tall, how much lot coverage), then layers on citywide rules for how far buildings must sit from property lines and streets. For residential lots, plan on 5 ft side and 10 ft rear minimums; “front setbacks” vary with the block and corner-lot rules and can sometimes go down to 10 ft with administrative approval. Height limits and special lakefront caps are strict downtown and along Lakeshore Drive. Mixed-use and commercial/industrial yards often mirror the adjacent residential standards. When in doubt, confirm the street-yard averaging math and any overlay or scenic-corridor constraints early.

Source References

§ 18-2.040 General Plan consistency; Land Use/Zoning matrix (CG/GC notation)
§ 18-3.020 RR standards (density, min lot, yard/height cross-refs)
§ 18-4.020 LDR standards (density, coverage, lot dimensions)
§ 18-5.020 MDR standards (density, coverage)
§ 18-6.020 HDR standards (density, coverage)
§ 18-7.020 MUX standards (density, height pathway, coverage, min lot)
§ 18-8.020 DC standards (density units, tall-building criteria, parking notes)
§ 18-9.020 GC standards (height/CUP, no coverage max)
§ 18-10.020 IN standards (height/CUP, no coverage max)
§ 18-11.020 O standards (front/side/rear yards; min lot by ownership)
§ 18-12.030 SP combining zone (standards as per the specific plan)
§ 18-13.010–.030 SC combining zone (corridor protections)
§ 18-14.030 AV combining district (flexible standards; 45 ft height; 60% coverage)
§ 18-15.020, .030 PD overlay (scope to modify standards incl. FAR; process)
§ 18-20.040 Yards (Tables 14–18: other yards; street yard averaging; encroachments)
§ 18-20.050 Coverage (definition; exceptions path)
§ 18-20.060 Height (measurement; Table 19 zone maxima; signs cross-ref)
§ 18-20.070 Fences/walls/hedges (heights; measurement; exceptions)
§ 18-20.090 Parking (ratios; driveway/yard tie-ins) — see Clearlake Parking for use-by-use tables.

Sources

Retrieved passages

Clearlake Zoning Code (Section 18-20.020) High relevance
Clearlake Zoning Code (Section 18-20.020) High relevance
Clearlake Zoning Code High relevance
Clearlake Zoning Code (Article 18-45) High relevance
Clearlake Zoning Code (Section 66410) High relevance
Clearlake Zoning Code (article inclusive) High relevance
Clearlake Zoning Code (Section 18-20.040.) High relevance
Clearlake Zoning Code (Section 18-20.090.) High relevance
Clearlake Zoning Code (Section 18-20.040.) High relevance
Clearlake Zoning Code (Section 18-20.040.) High relevance
Clearlake Zoning Code (Section 18-20.090.) High relevance
Clearlake Zoning Code (Article 18-29.) High relevance
Clearlake Zoning Code (Section 18-18.010) High relevance
Clearlake Zoning Code High relevance
Clearlake Zoning Code (Section 18-20.020) High relevance
Clearlake Zoning Code High relevance
Clearlake Zoning Code (Section 18-2.040) High relevance
Clearlake Zoning Code (Section 65960) High relevance

Cited sections

§ 18-2.040 General Plan consistency; Land Use/Zoning matrix (CG/GC notation) (§ 18-2.040)
§ 18-3.020 RR standards (density, min lot, yard/height cross-refs) (§ 18-3.020)
§ 18-4.020 LDR standards (density, coverage, lot dimensions) (§ 18-4.020)
§ 18-5.020 MDR standards (density, coverage) (§ 18-5.020)
§ 18-6.020 HDR standards (density, coverage) (§ 18-6.020)
§ 18-7.020 MUX standards (density, height pathway, coverage, min lot) (§ 18-7.020)
§ 18-8.020 DC standards (density units, tall-building criteria, parking notes) (§ 18-8.020)
§ 18-9.020 GC standards (height/CUP, no coverage max) (§ 18-9.020)
§ 18-10.020 IN standards (height/CUP, no coverage max) (§ 18-10.020)
§ 18-11.020 O standards (front/side/rear yards; min lot by ownership) (§ 18-11.020)
§ 18-12.030 SP combining zone (standards as per the specific plan) (§ 18-12.030)
§ 18-13.010–.030 SC combining zone (corridor protections) (§ 18-13.010)
§ 18-14.030 AV combining district (flexible standards; 45 ft height; 60% coverage) (§ 18-14.030)
§ 18-15.020, .030 PD overlay (scope to modify standards incl. FAR; process) (§ 18-15.020)
§ 18-20.040 Yards (Tables 14–18: other yards; street yard averaging; encroachments) (§ 18-20.040)
§ 18-20.050 Coverage (definition; exceptions path) (§ 18-20.050)
§ 18-20.060 Height (measurement; Table 19 zone maxima; signs cross-ref) (§ 18-20.060)
§ 18-20.070 Fences/walls/hedges (heights; measurement; exceptions) (§ 18-20.070)
§ 18-20.090 Parking (ratios; driveway/yard tie-ins) — see Clearlake Parking for use-by-use tables. (§ 18-20.090)
Clearlake_ZoningCode.md

Frequently asked questions

What can I build on an RR or LDR lot in Clearlake?

RR and LDR are intended for single-family homes. Key numbers: RR allows 1 unit per net acre with a 1.25-acre minimum lot; LDR allows up to 8 units per net acre with a 5,000 sf minimum lot. Residential “other yards” are 5 ft side and 10 ft rear; street-yard (front) distance is context-based with averaging/corner-lot rules and potential administrative reductions to 10 ft.

How tall can a building be downtown (DC)?

Base height is 35 ft. A project may be approved up to 65 ft if it includes housing, limits storefront-level private parking to 30% of site frontage, and is not on the lake side of Lakeshore Drive. On the lake side, Table 19 caps building height at 25 ft.

What are Clearlake’s standard residential setbacks?

For RR/LDR/MDR/HDR, minimum “other yards” are side 5 ft and rear 10 ft. Street yards vary: corner lots in RR/LDR need at least 10 ft on the longer frontage; in developed blocks the minimum street yard equals the average of existing front setbacks but not less than 10 ft, with limited administrative reductions also available.

Do ADUs count toward residential density or follow the same setbacks?

ADUs/JADUs are excluded from maximum density per Table 12 footnote. Table 14 also flags that ADU/JADU yards follow § 18-19.320. State law generally ensures at least a 4 ft side and rear yard for ADUs; confirm local administration on the Clearlake ADUs page.

Are there special height limits along Lakeshore Drive?

Yes. Both DC and GC have lake-side caps: DC is limited to 25 ft on the lake side of Lakeshore Drive; GC is also capped at 25 ft on the lake side (though GC elsewhere allows up to 45–50 ft with approvals).

How does slope affect how many homes I can build?

In RR/LDR/MDR/HDR, average cross-slope reduces maximum density per Table 12 (e.g., as slope increases beyond 15%, allowable density steps down). MUX, DC, GC, and IN are not slope-reduced.

Can I reduce my front setback to improve site design?

Possibly. § 18-20.040 allows administrative reductions to a 10 ft street yard and variable street yards in new subdivisions, subject to block-averaging and driveway/parking conditions (e.g., a driveway length that prevents sidewalk overhang).

What does the AV combining district change on older “paper subdivision” lots?

The AV district provides flexible standards (e.g., 45 ft height, 60% coverage, 5,000 sf minimum lot) plus baseline access, fire, and surfacing requirements so that substandard legacy lots can be built safely.

When would I use a PD overlay?

If a project needs coordinated adjustments (e.g., setbacks, coverage, height, FAR) while delivering superior design and plan-level coherence, the PD overlay can be applied to ≥1 acre with a specific plan for the site.

Do fences count against setbacks?

Fences can sit within required yards but are height-limited (street-yard fence heights per Figure 9; otherwise 6 ft), with special measurement rules over retaining walls and a Director exception process.

Ask about any Clearlake property

Get a cited, plain-English answer on Clearlake zoning, setbacks, FAR, ADUs and permits — for any address.

Start Free Trial