Local zoning · Lemon Grove

Lemon Grove — Overlay Districts

Q: Do STAs require special permits?

Many do. Several STAs explicitly require a planned development permit or a master development plan before development (examples: STA III, STA IV, STA V, STA VIII) — see § 17.20.010 and the specific STA subsection that applies to your parcel .

Q: What are the height and density limits in STA VIII?

STA VIII limits new buildings to two stories or a maximum height of 25 feet , whichever is more restrictive, and sets density options : 14 du/acre for single lots and 29 du/acre for parcels meeting frontage/area criteria; see § 17.20.010(K) for the exact phrasing and qualifying conditions .

Q: Are accessory dwelling units (ADUs) treated differently in overlays?

The code specifically exempts ADUs/JADUs from some STA triggers in at least one STA — STA VIII notes accessory dwelling units and junior ADUs are exceptions to the planned development permit requirement for that STA (see § 17.20.010(K) and the accessory-use cross-reference) . Always confirm with the city and consult the ADU page (/us/california/adu) for state and local ADU rules.

Q: How does the Central Business Special Sign District work?

The sign district is an overlay that allows design-based flexibility in downtown sign design (subject to total sign-area/height limits in the city sign code). The criteria are in § 17.20.040(G) and you must still meet Chapter 18.12 limits unless the special sign district text provides an explicit exception .

Q: Are the Entryway and Noise overlays active now?

No — § 17.20.020 (Entryway overlay) and § 17.20.030 (Noise impact overlay) are marked (RESERVED) in the code; they contain no operative standards. See § 17.20.020 and § 17.20.030 for the current status and confirm with staff for any future planned overlay text .

Overlay Districts under the Lemon Grove local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

Overlay districts in Lemon Grove modify rules of the underlying zones to implement place-specific goals (design, land use, signs, and special treatment areas). The city refers to these rules inside the zoning title; see the Lemon Grove Zoning overview for where overlays sit in the code. The basic legal rule is that an overlay zone supplements and may modify the principal district; the underlying district still applies except where the overlay states otherwise (§ 17.12.090; § 17.20.010) . Note that overlays do not replace compliance with statewide construction rules including the California Building Standards Code (Title 24) — those remain required for building permits (/us/california/building-codes).

How Lemon Grove’s overlays are organized (quick)

General rule: an overlay zone is applied only in combination with a base zone and “modifies” that base zone’s rules (§ 17.12.090; definition of overlay zone) .
The main overlay types in the zoning title are the Special Treatment Area (STA) overlays (STA I–VIII) and Special Sign Districts (§ 17.20.010; § 17.20.040) .
Some overlay placeholders exist but are currently reserved (for example, Entryway overlay and Noise impact overlay) (§ 17.20.020; § 17.20.030) .

District-by-district breakdown

Note: In most STAs the code defaults to the underlying zone for uses and standards except where the STA text is explicit. If a subsection below cites a specific STA requirement, that language is drawn from the STA text in § 17.20.010 (STA subsections) or the zone sections that reference STA applicability; verify parcel-specific application with the city.

STA I — Downtown Village / Central Business area

Purpose: To implement the Downtown Village Specific Plan and assure coordinated redevelopment and land-use policies. Properties in STA I are explicitly subject to the Downtown Village Specific Plan rather than only the base zone (§ 17.20.010; referenced within multiple district standards) .
Typical permitted uses: Governed by the Downtown Village Specific Plan and the underlying zone (commercial/mixed-use emphasis); check downtown plan for exact lists (§ 17.20.010; referenced in zone provisions) .
Key dimensional/permitting rules: Many activities within STA I require design/permitting consistent with the Downtown Village Specific Plan; base setbacks, parking, and other development standards still apply unless the specific plan or STA states otherwise (§ 17.20.010; as incorporated into zone sections) .
Where it applies: Downtown/redevelopment area shown on the zoning map (see community development for the adopted plan boundaries) (§ 17.12.030) .

STA II — (Where referenced in plan)

Purpose and standards: STA II is listed among the eight STAs in the code; the specific plan language and project-level rules are set in the STA text in § 17.20.010. For parcel-level application, verify map boundaries with the community development department (§ 17.20.010; § 17.12.030) .
Typical permitted uses and standards: Not restated broadly in the zoning matrix — underlying zone controls except where STA text specifies (see § 17.20.010) .

STA III — Regional Commercial (large-lot retail emphasis)

Purpose: Encourage large-lot retail and coordinated redevelopment in an identified regional-commercial STA (§ 17.20.010(F)) .
Typical permitted uses: Large retail and big-box retail formats; until new regulations are adopted, existing underlying zones control uses, but STA III adds requirements such as planned development permit required for any development within the STA (§ 17.20.010(F)(1)) .
Key dimensional/permitting rules: Planned development permit required for any development (regardless of size) and incentives are available (e.g., expedited processing, flexible signage) while the city works toward large-lot retail patterns (§ 17.20.010(F)) .
Where it applies: The regional commercial STA boundaries are in the zoning map and associated specific plan references (§ 17.12.030; § 17.20.010(F)) .

STA IV — Western Central Avenue Residential (master plan required)

Purpose: Protect large-area residential redevelopment by requiring a coordinated master plan (§ 17.20.010(G)) .
Typical permitted uses: Single single-family dwelling may be built on an individual legal lot; otherwise the STA prohibits piecemeal development until a master development plan is prepared and approved (§ 17.20.010(G)) .
Key dimensional/permitting rules: No development except single-family or accessory buildings until a master development plan covering the entire STA is adopted; planned development permit required for development (§ 17.20.010(G)(1)) .
Where it applies: Western Central Avenue residential STA boundaries as shown on the zoning map (§ 17.12.030) .

STA V — Federal Boulevard Automobile Sales District (auto-dealership-only)

Purpose: Create a modern automobile-sales corridor allowing new car dealerships as the primary use (§ 17.20.010(H)) .
Typical permitted uses: New automobile dealerships only (automobile includes trucks and RVs but excludes motorcycles); accessory uses to dealerships may be allowed by city council finding (§ 17.20.010(H)) .
Key dimensional/permitting rules: Planned development permit required for any development within STA V; minimum area/subdivision restrictions to avoid fragmentation without council findings (§ 17.20.010(H)) .
Where it applies: Federal Boulevard corridor—see the zoning map and STA text (§ 17.12.030; § 17.20.010(H)) .

STA VI — Central Lemon Grove Avenue (geotech & access controls)

Purpose: Allow low-traffic commercial uses while protecting steep slopes and traffic flow (§ 17.20.010(I)) .
Typical permitted uses: Commercial uses that generate low traffic volumes and tolerate higher noise; underlying zone controls uses unless STA text modifies them (§ 17.20.010(I)) .
Key dimensional/permitting rules: Planned development permit required; geotechnical study required for renovation/remodeling that involves grading; traffic study required for new development; no vehicle access from Noble Street (explicit access restriction) (§ 17.20.010(I)(1)–(4)) .
Where it applies: Central Lemon Grove Avenue STA as mapped in the zoning documents (§ 17.12.030) .

STA VII — SR-125 Interchange Planning Area (advisory, coordinate with Caltrans)

Purpose: Preserve flexibility for future interchange planning and minimize conflict with the freeway alignment (§ 17.20.010(J)) .
Typical permitted uses: Development must conform to underlying zone; STA is largely advisory to alert owners that interchange conditions could change traffic/access in the future (§ 17.20.010(J)) .
Key permits/requirements: Development must conform to the underlying zoning; STA text imposes no special physical-control standards beyond the advisory language (§ 17.20.010(J)) .
Where it applies: Lands adjacent to SR-125 as identified on the zoning map (§ 17.12.030) .

STA VIII — Eastern Central Avenue Residential (multi-family direction; ADU note)

Purpose: Encourage apartments and condominiums close to downtown while protecting scale and stability (§ 17.20.010(K)) .
Typical permitted uses: Multi‑family residential consistent with densities set in STA VIII; accessory dwelling units are explicitly treated in the STA language (see exceptions below) (§ 17.20.010(K)) .
Key dimensional/permitting rules: Planned development permit required for development (except ADUs/JADUs as stated); single lots may be developed at 14 dwelling units per acre; parcels with ≥100 ft frontage and ≥15,000 sq ft may develop at 29 du/acre; buildings limited to two stories or 25 ft, whichever is more restrictive (§ 17.20.010(K)(1)–(4)) .
Where it applies: Eastern Central Avenue STA boundaries on the zoning map (§ 17.12.030) .

Special Sign Districts — Central Business Special Sign District

Purpose: Allow sign regulations to be tailored to reinforce identity of specific business areas; special sign districts are considered overlays modifying sign rules (§ 17.20.040) .
Typical permitted sign treatments: Within the Central Business Special Sign District (downtown), sign approval criteria are more design-driven: unified sign plans for contiguous properties, proportional sign sizing, design compatibility, and limited flexibility from explicit standards so long as total sign area/height remain within citywide sign ordinance limits (see LGMC Chapter 18.12) (§ 17.20.040(G)) .
Where it applies: Former redevelopment area No. 1 / downtown revitalization area — mapped area in zoning documents (§ 17.20.040(C),(G)) . For sign technical standards, cross-check the city sign ordinance (Chapter 18.12) — see Lemon Grove Signage for administrative procedures (/us/california/lemon-grove/signage).

Quick reference table — most decision‑relevant overlay rules

District / Topic	Most-decision-relevant rule(s) (plain English)	Code reference
Overlay zone (definition)	Overlay modifies base zone; more than one overlay may apply to a property	§ 17.04 / definition; § 17.12.090
STA I (Downtown)	Properties governed by Downtown Village Specific Plan; specific plan rules control design/use	§ 17.20.010; referenced repeatedly in zone rules
STA III (Regional Commercial)	Planned development permit required for any new development; incentives for large-lot retail	§ 17.20.010(F)
STA IV (Western Central Ave)	Master development plan required before most new development; single-family exception	§ 17.20.010(G)
STA V (Federal Blvd)	Automobile dealerships only unless Council finds otherwise; planned development permit required	§ 17.20.010(H)
STA VI	Geotechnical study and traffic study required for renovation/new development; access restrictions (no Noble St)	§ 17.20.010(I)
STA VIII	Density limits (14 du/acre on single lots; 29 du/acre on qualifying parcels); two stories or 25 ft max; planned development permit required (ADU exceptions)	§ 17.20.010(K)
Sign District (Central Business)	Design-based sign flexibility allowed subject to city sign ordinance limits and unified sign plans	§ 17.20.040(G); Chapter 18.12

Checklist — what an applicant must satisfy when a property lies in an overlay

Confirm overlay boundaries and underlying base zone with the community development department and the city zoning map (§ 17.12.030) .
Determine whether the overlay (e.g., STA IV, STA V, STA VIII) requires a planned development permit or a master development plan; if so, prepare the P.D. application per the code references in the STA text (§ 17.20.010; reference in STA subsections) .
If in STA VI, budget and commission a geotechnical study and a traffic study as required by the STA text (§ 17.20.010(I)) .
If in STA V (Federal Blvd), ensure proposed use is consistent with auto-dealership-only policy or obtain council-level findings for accessory uses (§ 17.20.010(H)) .
Confirm parking requirements from the underlying zone and submit parking calculations (off-street parking rules) — see Lemon Grove Parking for how the city applies schedules and for cross-checking with overlay exceptions (/us/california/lemon-grove/parking) (§ 17.24.010 referenced throughout zone sections) .
For any signage proposals inside a sign district, prepare a unified sign plan or design narrative and show compliance with Chapter 18.12 and the special sign district criteria (§ 17.20.040; Chapter 18.12) .
Check whether design review or other discretionary review is triggered by the overlay or the planned development permit and consult the Design Review procedures (/us/california/lemon-grove/design-review) (§ 17.28.xx references in planned development language; verify with staff) .
Confirm whether accessory dwelling units (ADUs) are treated differently in the STA (e.g., STA VIII acknowledges ADU/JADU exceptions); review the ADU rules and file accordingly (/us/california/adu) (§ 17.20.010(K); § 17.24.060 referenced) .
Verify compliance with underlying development standards (setbacks, heights, lot coverage) via the city’s Development Standards page (/us/california/lemon-grove/development-standards) and with building permit requirements under Title 24 (/us/california/building-codes) (§ 17.24.x; general code adoption language) .

Risks & Ambiguities

Issue	Why it matters	What to verify
Boundary uncertainty	Zoning map scale and boundary depiction rules may create ambiguity when an overlay line splits a parcel (§ 17.12.040)	Verify exact overlay boundaries with the community development department and get a written determination if unclear (§ 17.12.040)
Underlying zone vs overlay conflict	Overlays modify the underlying zone only to the extent stated; it’s easy to assume an overlay controls broadly when it only addresses a narrow issue (§ 17.12.090)	Read the STA language carefully; where silent, the base zone rules apply. If unsure, ask staff to confirm which standard controls (§ 17.12.090)
Parcel-specific triggers (P.D., master plans)	Several STAs require a planned development permit or a master development plan; missing that trigger can stop entitlement processing (§ 17.20.010(F)–(K))	Confirm whether your parcel falls inside an STA that mandates a P.D. or master plan and whether ADUs are exempt (e.g., STA VIII) (§ 17.20.010(K))
Reserved overlays (Entryway, Noise)	Placeholders exist in the code but contain no rules; relying on them will not produce entitlements (§ 17.20.020; § 17.20.030)	These are listed as RESERVED; there is no regulatory text to rely on — confirm with staff whether a future overlay is planned (§ 17.20.020; § 17.20.030)
Sign flexibility vs sign-code limits	Sign districts allow design flexibility but do not override the city sign ordinance’s overall limits — misreading this can cause noncompliance (§ 17.20.040(G); Ch. 18.12)	Cross-check total sign area/height and unified sign plan procedures in Chapter 18.12 before assuming flexibility (§ 17.20.040(G); Ch. 18.12)

Plain‑English summary

Lemon Grove’s overlay districts (mainly the eight Special Treatment Areas and a downtown Special Sign District) layer place-specific rules onto the base zone: in most cases the base zone controls unless the overlay says otherwise; several STAs require planned-development approval, master plans, studies (geotech/traffic), or reserve specific uses (for example, the Federal Boulevard auto-sales STA) (§ 17.12.090; § 17.20.010; § 17.20.040) .

Source References

Definition of overlay zone and general use of overlays: § 17.04 (definitions) and § 17.12.090 (general regulations for overlay districts) .
Chapter and citation establishing STAs and overlay rules: § 17.20.010 (Special treatment area overlays — STA I–VIII) .
Specific STA provisions (examples cited above): § 17.20.010(F) (STA III) ; § 17.20.010(G) (STA IV) ; § 17.20.010(H) (STA V) ; § 17.20.010(I) (STA VI) ; § 17.20.010(J) (STA VII) and § 17.20.010(K) (STA VIII) .
Special sign district rules: § 17.20.040 (Special sign districts / Central Business Special Sign District) and cross-reference to Chapter 18.12 (City Sign Ordinance) .
Zoning map rules and boundary determinations: § 17.12.030 and § 17.12.040 .
Examples where STA I is referenced inside zone provisions (Downtown Village Specific Plan applicability): multiple zone sections referencing STA I (e.g., § 17.16.050(I)) .
Cross-cutting development standards and accessory-use references (setbacks, parking, ADUs, etc.): Chapter 17.24 development standards and § 17.24.060 (Accessory uses / ADUs referenced) — see relevant zone text citations above .
Use the Lemon Grove Zoning landing pages and topic pages referenced in-text for administrative procedures and submittal formats: Lemon Grove Zoning (/us/california/lemon-grove/zoning); Lemon Grove Development Standards (/us/california/lemon-grove/development-standards); Lemon Grove Parking (/us/california/lemon-grove/parking); Lemon Grove Design Review (/us/california/lemon-grove/design-review); Lemon Grove Signage (/us/california/lemon-grove/signage); Lemon Grove ADUs (/us/california/adu); California Building Standards Code (/us/california/building-codes).

Sources

Retrieved passages

Lemon Grove Zoning Code (section or) High relevance
Lemon Grove Zoning Code (§ 4) High relevance
Lemon Grove Zoning Code (§ 17.12.030.) High relevance
Lemon Grove Zoning Code (section or) High relevance
Lemon Grove Zoning Code Medium relevance
Lemon Grove Zoning Code (§ 3) Medium relevance
Lemon Grove Zoning Code Medium relevance
Lemon Grove Zoning Code (section shall) Medium relevance

Cited sections

Official Lemon Grove code library

Frequently asked questions

What does an overlay district do in Lemon Grove?

An overlay district adds area‑specific rules on top of the base zoning: the underlying zone still applies except where the overlay explicitly changes it. The legal baseline is the overlay definition and the general overlay rule in § 17.12.090 and the overlay chapter (§ 17.20.010) .

Can I build the same uses in an STA as in the base zone?

Usually yes — uses are governed by the underlying base zone unless the STA text limits or prescribes uses (for example, STA V limits the Federal Boulevard area to automobile dealerships) — check the STA language in § 17.20.010 for parcel-specific restrictions (e.g., § 17.20.010(H) for STA V) .

Do STAs require special permits?

Many do. Several STAs explicitly require a planned development permit or a master development plan before development (examples: STA III, STA IV, STA V, STA VIII) — see § 17.20.010 and the specific STA subsection that applies to your parcel .

What are the height and density limits in STA VIII?

STA VIII limits new buildings to two stories or a maximum height of 25 feet, whichever is more restrictive, and sets density options: 14 du/acre for single lots and 29 du/acre for parcels meeting frontage/area criteria; see § 17.20.010(K) for the exact phrasing and qualifying conditions .

Are accessory dwelling units (ADUs) treated differently in overlays?

The code specifically exempts ADUs/JADUs from some STA triggers in at least one STA — STA VIII notes accessory dwelling units and junior ADUs are exceptions to the planned development permit requirement for that STA (see § 17.20.010(K) and the accessory-use cross-reference) . Always confirm with the city and consult the ADU page (/us/california/adu) for state and local ADU rules.

If my lot is split by an overlay boundary which standard applies?

Where a district boundary splits a lot, rules say the lot is included within the district that is more restrictive; boundary determination rules are in § 17.12.040 — but you should get a formal boundary interpretation from the city if the map is unclear (§ 17.12.040) .

Do overlays change parking requirements?

Not unless the overlay explicitly does so; generally the off-street parking schedule and rules from Chapter 17.24 still apply unless the STA or Special Sign District language states an alternative. Cross-check with Lemon Grove Parking and the zone’s listed references to § 17.24.010 (§ 17.24.x citations appear in zone sections) .

How does the Central Business Special Sign District work?

The sign district is an overlay that allows design-based flexibility in downtown sign design (subject to total sign-area/height limits in the city sign code). The criteria are in § 17.20.040(G) and you must still meet Chapter 18.12 limits unless the special sign district text provides an explicit exception .

Are the Entryway and Noise overlays active now?

No — § 17.20.020 (Entryway overlay) and § 17.20.030 (Noise impact overlay) are marked (RESERVED) in the code; they contain no operative standards. See § 17.20.020 and § 17.20.030 for the current status and confirm with staff for any future planned overlay text .

Who do I contact to verify whether my parcel is inside an STA?

Contact the city’s Community Development / Development Services Department and request an overlay/boundary determination; the zoning map and its official on‑file version control boundaries per § 17.12.030 and the boundary‑determination rules in § 17.12.040 .

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