Lakeport — Overlay Districts

Last reviewed: July 2, 2026

Overview

Lakeport's zoning ordinance implements what many jurisdictions call "overlay districts" through a system of combining districts that add site-specific rules on top of base zones. The ordinance identifies combining districts (example: SD, HP, PD, P) and explains how they interact with base zones; the general rule is that combining-district regulations apply in addition to the underlying district and the more restrictive provision controls. See § 17.02.020 for the combining-district rule and § 17.02.050 for the map authority.

Note: Lakeport's code predominantly uses the term "combining district" rather than the word "overlay." Verify parcel-level application with the city's zoning map. § 17.02.020; § 17.02.050.

How to read this page quickly

• If your property has an extra symbol (for example, SD or HP) on the Lakeport zoning map, the combining-district rules in the chapters below apply in addition to the base zone rules. See the official Lakeport Zoning map to confirm a parcel's designations.

District-by-district breakdown

Below are the combining districts explicitly codified in Title 17 that function as Lakeport's overlays. Each subsection gives purpose, what is typically allowed or restricted, key dimensional or submittal standards, and where it applies.

SD — Clear Lake Shoreline Development Combining District (SD)

• Purpose: Protect environmentally sensitive shoreline areas, prevent wetland degradation, reduce erosion and water-quality impacts, and preserve view corridors. § 17.18.010.
• Typical permitted uses / triggers: Any base-zone use that involves grading, dredging, filling, excavation, or new/modified shoreline structures requires a shoreline development permit. § 17.18.030.
• Key dimensional / procedural standards:
  • Required elevation/setback for most structures: 7.79 (above Zero Rumsey; 1318.26 A.S.L.) for non-lake-oriented construction; increased setbacks may be imposed to meet findings. § 17.18.050.
  • Maximum height along Clear Lake shoreline: 25 ft unless a use permit allows more. § 17.18.060.
  • A shoreline development plan is required with land-use or building permit applications in SD; the plan must include scaled plot plans, vegetation inventories, topography, wetland maps, and habitat protection measures. § 17.18.070.
  • Approval findings are explicit (water quality, habitat protection, minimal bank disturbance, general-plan consistency). § 17.18.080.
• Where it applies: Any parcel shown as SD on the Lakeport zoning map. § 17.18.020; see the city zoning map rules § 17.02.050.

(Mention of shoreline procedures often triggers questions about stormwater, erosion controls and Lakeport Development Standards and Lakeport Parking requirements; those chapters remain applicable where cited by the SD rules.)

HP — Historic Preservation Combining District (HP)

• Purpose: Protect, enhance, and perpetuate sites/buildings/objects of historic or cultural value. § 17.19.010.
• Typical permitted uses / triggers: All uses allowed by the base zone remain permitted, but proposed alterations or demolitions of features that give the property its historic character require a use permit; minor non-character-altering changes may be director-approved. § 17.19.030.
• Key dimensional / procedural standards:
  • Buildings 45 years or older are presumed historic and may need evaluation under the HP criteria. § 17.19.040.
  • Incentives: tax-preference mechanisms and potential use of the State Historic Building Code in lieu of the Uniform Building Code for registered cultural sites. § 17.19.060.
• Where it applies: Land formally designated HP on the zoning map or designated by council/commission per the code's criteria. § 17.19.020; zoning map rules § 17.02.050.

(If your project triggers HP design-review or preservation rules, consult the city's Lakeport Historic Preservation guidance and the local Lakeport Design Review process; alterations require a use permit per § 17.19.030.)

PD — Planned Development Combining District (PD)

• Purpose: Allow creative, flexible project design that may deviate from some numeric standards of the base zone when there is a public benefit (open space preservation, improved design, affordable housing, etc.). § 17.17.010.
• Typical permitted uses / triggers: Uses allowed are those of the underlying zone as shown on an approved development plan; PD is typically used when a consolidated, site-specific plan is desired. § 17.17.030.
• Key dimensional / procedural standards:
  • Base-zone area, height, lot width, and yard regulations apply unless specific deviations are approved as part of the PD development plan. § 17.17.040.
  • The PD application must include a development plan and is processed together with the required use permit; the planning commission may approve deviations when clear public benefits exist. § 17.17.050–060.
  • Time limits and extension rules apply to approved PDs (including a 24-month building-permit timeline and possible extension rules). § 17.17.080–090.
• Where it applies: Where a PD symbol is added to a base zone on the city's zoning map; PD can be applied "in any zoning district" if conditions are met. § 17.17.020; § 17.02.050.

P — Eleventh Street Professional Use Combining District (P)

• Purpose: Regulate professional-office conversions and new development specifically within the Eleventh Street corridor between Main Street and Highway 29. § 17.15.010.
• Typical permitted uses / triggers: All professional uses and those uses of the underlying base zoning that are outrightly permitted may apply; some uses still require a use permit as noted in the chapter. § 17.15.030–040.
• Key dimensional / procedural standards:
  • Minimum yards (setbacks): Front yard 15 ft, Rear yard 10 ft, Side yard 5 ft (10 ft street-side on corner lots). § 17.15.050.
  • Projects in the P combining district are subject to architectural and design review and may be required to provide frontage improvements, right-of-way dedication, and landscaping. § 17.15.060.
• Where it applies: Parcels shown as the P combining district on the zoning map (Eleventh Street corridor). § 17.15.020; § 17.02.050.

Quick reference table — decision-relevant rules

Checklist — what an applicant must satisfy when a combining district applies

• Confirm parcel designations on the city zoning map and whether a combining-district symbol (e.g., SD, HP, PD, P) appears — see § 17.02.050.
• Comply with all base-zone standards (use, setbacks, coverage, height) unless a combining district or PD expressly allows deviations — § 17.02.060; § 17.17.040.
• If in SD, prepare a shoreline development plan with vegetation/topography/wetland mapping and habitat protection measures; be prepared to satisfy the § 17.18.080 findings. § 17.18.070–080.
• If in HP, expect a use permit for alterations that affect historic character; gather historic evaluations if the building is older than 45 years. § 17.19.030–040.
• If proposing a PD, include a full development plan and rationale showing public benefit for deviations; plan for planning-commission review and time-limit conditions. § 17.17.050–080.
• Expect design review where applicable (downtown/CB, P district, etc.). See the Lakeport Design Review chapter and § 17.27 for procedures.
• Provide parking in accordance with Chapter 17.23 where the combining district does not waive parking; consult Lakeport Parking.
• For historic-structure work, consider the incentives and the option to comply with the State Historic Building Code instead of UBC; see § 17.19.060 and consult the California Building Standards Code.

Risks & Ambiguities

Plain-English Summary

If your Lakeport property carries a combining-district symbol (for example, SD along Clear Lake, HP downtown, PD for a planned subdivision, or P on Eleventh Street), expect extra rules layered on top of your base zone: shoreline sites need a shoreline development plan and strict setback/height and environmental findings; historic sites require use permits for character-altering changes; planned developments allow design flexibility but need an approved development plan; and the Eleventh Street combining district sets corridor-specific setbacks and design review. Always check the zoning map and talk to the Community Development Department — combining-district rules are applied parcel-by-parcel and the more restrictive rule controls. See § 17.02.020 and the district chapters cited above.

Information Gaps

• The actual city zoning map with parcel-level combining-district placements is not included in the retrieved materials; the code makes the map part of the title but the image/GIS is not here. See § 17.02.050.
• The term "overlay district" is not used in the retrieved ordinance text; Lakeport consistently uses "combining district" language. (Term "overlay" not found in retrieved materials.) Verify with the jurisdiction if local staff use the word "overlay" informally. § 17.02.020.
• Parcel-specific thresholds (exact setback in feet for particular lots within SD beyond the base 7.79 standard) and any map-based buffer widths must be confirmed with the zoning map or staff — code allows increased setbacks by finding. § 17.18.050–080.

Source References

• Combining districts and map authority — § 17.02.020, § 17.02.050.
• Planned Development Combining District (PD) — § 17.17.010–090.
• Clear Lake Shoreline Development Combining District (SD) — § 17.18.010–100.
• Historic Preservation Combining District (HP) — § 17.19.010–060.
• Eleventh Street Professional Use Combining District (P) — § 17.15.010–060.
• Design review and related procedures referenced — Chapter 17.27 and architectural/design review notes in district chapters.
• Parking chapter cross-references — Chapter 17.23.

Retrieved passages

• Lakeport Zoning Code (§ 17.14.020.) High relevance show source text
• Lakeport Zoning Code (§ 17.12.080.) High relevance show source text
• Lakeport Zoning Code (§ 17.02.040.) High relevance show source text
• Lakeport Zoning Code (§ 17.01.040.) High relevance show source text
• Lakeport Zoning Code (§ 17.18.050.) High relevance show source text
• Lakeport Zoning Code (Chapter 17.14.) High relevance show source text
• Lakeport Zoning Code (§ 1) Medium relevance show source text
• Lakeport Zoning Code (Chapter 17.15.) Medium relevance show source text
• Lakeport Zoning Code (Chapter 17.17.) High relevance show source text
• Lakeport Zoning Code (Chapter 17.19.) High relevance show source text
• Lakeport Zoning Code (§ 17.17.050.) High relevance show source text
• Lakeport Zoning Code (§ 17.18.020.) High relevance show source text
• Lakeport Zoning Code (§ 17.18.090.) High relevance show source text
• Lakeport Zoning Code (§ 17.02.020.) High relevance show source text
• Lakeport Zoning Code (§ 2) High relevance show source text

Cited sections

• Combining districts and map authority — **§ 17.02.020**, **§ 17.02.050**. (§ 17.02.020)
• Planned Development Combining District (PD) — **§ 17.17.010–090**. (§ 17.17.010)
• Clear Lake Shoreline Development Combining District (SD) — **§ 17.18.010–100**. (§ 17.18.010)
• Historic Preservation Combining District (HP) — **§ 17.19.010–060**. (§ 17.19.010)
• Eleventh Street Professional Use Combining District (P) — **§ 17.15.010–060**. (§ 17.15.010)
• Design review and related procedures referenced — Chapter **17.27** and architectural/design review notes in district chapters.
• Parking chapter cross-references — Chapter **17.23**. (chapter cross-references)
• Lakeport_ZoningCode.md

• Official Lakeport code library