Local zoning · Glendora
Glendora — Signage
Signage under the Glendora local zoning and planning code, with the controlling citations.
Last reviewed: July 2, 2026
Overview
This page summarizes what the City of Glendora's zoning and specific-plan provisions actually require for signs (types, sizes, illumination, placement, and review). It pulls directly from the Glendora Zoning Code and the city’s specific plans (Route 66 Corridor, Diamond Ridge, and the Glendora Commercial Specific Plan) and points you to the exact controlling code sections so you can verify on a parcel-by-parcel basis. For related procedural items see Glendora Zoning, design review, and development standards pages linked below.
Key local sign rules are located in § 21.10.280, § 21.10.390, § 21.11.030, and § 21.08.030 of the Glendora Municipal Code; the Route 66 specific-plan design guidelines supplement the standards for that area.
How the ordinance is organized (what controls what)
Citywide sign code standards are applied unless a specific plan or master development plan (e.g., Route 66 Corridor, Diamond Ridge, Glendora Commercial Specific Plan) provides its own sign program; where a specific plan applies, its rules take precedence for that area. See § 21.11.030 (Diamond Ridge) and § 21.08.030 (Glendora commercial specific plan) for the specific-plan rule that signage and other development standards live in the specific plan.
The Route 66 Corridor specific plan contains both design-guideline text and strict sign standards; the sign standards and review procedures for the Route 66 area are in § 21.10.280 and § 21.10.390.
(First mention links: Glendora Zoning, development standards, parking, design review, overlay districts, ADUs, and Title 24)
- See Glendora Zoning for zone maps and base rules. (/us/california/glendora/zoning)
- Specific-plan sign standards interact with the city's Development Standards (/us/california/glendora/development-standards), Parking rules (/us/california/glendora/parking), and Design Review procedures (/us/california/glendora/design-review).
- Overlays may modify signage in specific areas (/us/california/glendora/overlay-districts).
- Residential accessory sign/temporary sign situations sometimes touch ADU rules; check the ADU page when a sign is attached to or advertises an ADU (/us/california/glendora/adu).
- Structural elements and electrical/illumination also must comply with the California Building Standards Code (Title 24) (/us/california/building-codes).
District-by-district breakdown
Route 66 Corridor — overview and subdistricts (applies in the Route 66 specific plan area)
Purpose: Create a coordinated visual character along the Route 66 corridor and regulate sign scale and lighting to improve legibility and aesthetics. See § 21.10.280 (design guidelines) and § 21.10.390 (specific sign standards).
Subdistricts referenced in the sign standards: BG, GCG, RSC, CRR, LHG, TCO, TCMU, and GLG. The ordinance lists different allowances and exceptions by these subdistricts.
Typical permitted sign types: wall signs, monument signs, shopping-center primary and secondary identification signs, and limited pylon/monument signs for multi-tenant centers. Billboards are prohibited.
Key dimensional rules (selected, see table below for full quick-reference):
- Monument signs allowed in BG, GCG, RSC, CRR, LHG, TCO; TCMU and GLG generally do not permit monument signs except for properties fronting Route 66 that comply with the section. § 21.10.390
- Monument maximum height: 6 ft (exceptions for design features require reviewing-body approval). § 21.10.390
- Monument max sign face area: 40 sq ft per face. § 21.10.390
- Spacing between monument signs: minimum 75 ft unless waived by the planning director. § 21.10.390
- Shopping-center primary ID sign: max 100 sq ft per face, max 10 ft height, 10 ft streetside setback when center has ≥200 ft frontage. § 21.10.390
Illumination/design constraints: Only sign copy should be internally illuminated for monument signs (external illumination preferred); design must be consistent with Route 66 design guidelines and avoid glare/impacts to nearby residences. § 21.10.390 and § 21.10.280
Where it applies: properties inside the Route 66 Corridor specific plan area — check the Route 66 map and the subdistrict designation in the code. § 21.10.200–280 and § 21.10.390.
Glendora Commercial Specific Plan (Glendora Marketplace)
Purpose: Project-level sign program for a defined commercial redevelopment area; the specific plan sets project identification, pylon, and monument standards intended to be stricter / tailored than the base zoning. See § 21.08.030 and related figures.
Typical permitted sign types: large project pylon signs, freestanding monument signs, building-mounted tenant signs consistent with developer-approved sign program; no portable signs; billboards prohibited. § 21.08.030
Key dimensional rules (project-level):
- Project identification pylon (freeway-facing): up to 120 ft tall and up to 980 sq ft per side at a specified corner (measured from adjacent grade). § 21.08.030
- Secondary freestanding sign along Lone Hill Ave: up to 22 ft tall and up to 224 sq ft per side. § 21.08.030
- Monument signs for the project: up to 8 ft tall and 32 sq ft per face (incorporated into berming). § 21.08.030
- Ground-mounted signs must be set back from the ultimate curb face and placed so as not to create pedestrian/vehicular hazards; landscaped base equal to twice the area of one face often required. § 21.08.030
Materials / lighting: Tenant wall signs are limited to internally illuminated channel letters with Plexiglas face and sheet-metal return; exposed wiring or exposed lamps are prohibited; neon allowed in storefront windows only subject to approval. § 21.08.030
Where it applies: the Glendora Marketplace commercial specific plan area described in Chapter 21.08 and its appendices. § 21.08.030
Diamond Ridge Specific Plan (Diamond Ridge Marketplace)
Purpose: Site-specific sign program for the Diamond Ridge development; the specific plan both prescribes and limits sign types to maintain a coordinated appearance. See § 21.11.030 and supporting text/figures.
Typical permitted sign types: pylon/project ID signs, monument signs, directional signs, tenant wall signs, tenant panels on multi-tenant monuments, limited neon for specific tenants (theater), and gasoline pricing signs for service stations. § 21.11.030
Key dimensional rules (selected):
- On-site pylon signs: up to 30 ft height with 80 sq ft sign face per side (project pylon specs appear in the plan). § 21.11.030
- Monument signs: up to 8 ft tall and 32 sq ft sign face per side; directional signs up to 6 ft tall and 24 sq ft per side. § 21.11.030
- Major tenants (≥10,000 sq ft or other specified thresholds): allowed letter heights up to 8 ft and max sign area up to 500 sq ft (major-tenant rules vary by plan language). § 21.11.030
- Rear-elevation (service/secondary) signs: typically limited to 1.5 sq ft per linear foot of leased frontage, capped at 150 sq ft total and 48 in height; illumination for rear signs often prohibited. § 21.11.030
Design guidelines: signs must be high-quality materials, compatible with building architecture, limited copy (name/address/logo), and avoid animated, flashing, or audible signs except as specifically allowed (e.g., movie theater neon exceptions). § 21.11.030
Where it applies: Diamond Ridge specific plan boundaries (Chapter 21.11). § 21.11.030
Quick-reference standards table (decision‑relevant)
| Standard / Sign Type | Typical local limit | Code Reference |
|---|---|---|
| Monument sign — Route 66 subdistricts (height) | 6 ft max (exceptions allowed by review) | § 21.10.390 |
| Monument sign — Route 66 (area) | 40 sq ft per face | § 21.10.390 |
| Monument sign spacing | 75 ft minimum between monument signs | § 21.10.390 |
| Shopping-center primary ID sign | 100 sq ft per face; 10 ft height; 10 ft setback | § 21.10.390 |
| Glendora commercial SP — freeway pylon | 120 ft tall; 980 sq ft per side (project-level, specific location) | § 21.08.030 |
| Glendora commercial SP — Lone Hill freestanding sign | 22 ft tall; 224 sq ft per side | § 21.08.030 |
| Diamond Ridge — on-site pylon | 30 ft height; 80 sq ft per side | § 21.11.030 |
| Diamond Ridge — major tenant wall sign | up to 8 ft letter height; 500 sq ft max area | § 21.11.030 |
| Rear elevation (Diamond Ridge) | 1.5 sq ft per linear ft; max 150 sq ft; height 48 in; no illumination | § 21.11.030 |
| Animated / flashing signs | Generally prohibited (limited exceptions) | § 21.08.030 / § 21.11.030 |
Practical guidance / interpretation tips
Specific plans win. If your property sits inside a specific plan boundary (Route 66, Diamond Ridge, or Glendora Commercial SP), treat that plan as the primary rule set for signage and follow the plan’s figures and sign program first; the plan text explicitly states it supersedes the base zoning where it applies (e.g., § 21.11.030, § 21.08.030).
Don’t assume “typical” zoning numbers apply — shopping-center signage, freeway pylon signs, or project identification signs in specific plans have much larger, project-level allowances and are often tied to the master development plan figures (e.g., the Glendora commercial SP pylon specs). Verify precise location, frontage, and approved master plan figures before budgeting a custom pylon. § 21.08.030
Illumination and glare are controlled both by sign sections and by design guidelines. Route 66 guidelines emphasize legibility and avoiding competing visual clutter; monument external illumination is preferred so that only copy is lit. § 21.10.280 and § 21.10.390
Tenant signs in multi-tenant buildings: pay attention to the tenant-size rules (percentage of storefront width, letter-height caps, and centering requirements) in the specific plans — violations are common and often require redesign or a minor modification. § 21.11.030 / § 21.08.030
Visibility & traffic safety: all sign placements must avoid impeding sight distances and must respect curb/clearance requirements (setbacks from ultimate curb face are repeatedly required in specific plans). Confirm sight-distance rules with Public Works and the Caltrans manual when freeway-facing signs are involved. § 21.08.030 and Route 66 sign sections reference sight-line safety.
Checklist (what an applicant must satisfy before installing a sign)
- Confirm whether the parcel is inside a specific plan (Route 66, Diamond Ridge, Glendora Commercial SP) — if so, use that plan’s sign program (verify § 21.11.030 or § 21.08.030).
- Use the applicable dimensional limits (height, area, spacing, setbacks) from the correct section: § 21.10.390, § 21.10.280, § 21.11.030, or § 21.08.030.
- Prepare sign drawings showing size, materials, colors, copy area, structural supports, electrical/illumination details, and exact location relative to curb/curb face; include landscaping plan if a landscaped base is required. (Specific-plan text requires developer and planning-agency approval for tenant signs.)
- Check illumination restrictions (internal vs. external, neon limits, brightness adjacent to residences). § 21.10.280 and § 21.10.390 contain guidance.
- Confirm you are not proposing a prohibited sign type (billboards are prohibited in the plans). § 21.08.030 / § 21.11.030.
- Submit sign permit application to the Planning/Building Department and obtain planning approval (some deviations require planning-agency or reviewing-body approval or a variance). See Glendora Design Review and Variances and Exceptions pages. (/us/california/glendora/design-review) (/us/california/glendora/variances-and-exceptions)
- Coordinate any structural/electrical/installation work with Building Division and comply with California Building Standards Code (Title 24). (/us/california/building-codes)
Risks & Ambiguities
| Issue | Why it matters | What to verify |
|---|---|---|
| Specific-plan vs. base zoning conflict | Specific plans (e.g., Diamond Ridge § 21.11.030) take precedence but may not repeat every base-code detail — missing topics revert to Title 21. If you rely on generic zoning rules you'll risk nonconformance. | Confirm the parcel’s plan boundary and which chapter applies; check § 21.11.030 and § 21.08.030. Verify with the planning division. |
| “Major tenant” thresholds and letter-height caps | Major-tenant allowances (large letters / larger areas) vary by plan and by whether a tenant meets square-foot thresholds — misclassifying a tenant can lead to rejected plans. | Verify tenant-size thresholds in the applicable plan language (e.g., Diamond Ridge major-tenant rules § 21.11.030). |
| Rear-wall signage illumination prohibition | Some specific-plan rear-sign rules forbid illumination; assuming back-wall signs can be lit may violate the plan. | Check rear-elevation table and illumination notes in § 21.11.030 / specific plan figures. |
| Freeway-facing pylon measurements | Height is measured from adjacent surface grade and figures in the specific plan define exact location — measurement/grade differences can change allowable heights. | Confirm the master development plan figure and verify measurement method (see § 21.08.030). |
| Design-review vs. ministerial sign permits | Some signs require design-review or reviewing-body approval (exceptions, tall monuments, or deviations). Assuming a straight ministerial sign permit may delay your project. | Check the specific-plan sign program and the city's design-review rules; if in doubt, assume planning review is required. See § 21.10.280 and the Design Review page. (/us/california/glendora/design-review) |
Plain-English Summary
If your property is inside a Glendora specific plan (Route 66, Diamond Ridge, or the Glendora Commercial SP), follow that plan’s sign program first — it contains the exact sizes, heights, illumination limits, and appearance rules (e.g., pylon size, monument area, neon allowances). Otherwise, Route 66 and the city’s sign chapters set limits like 6 ft monument heights and 40 sq ft faces in some subdistricts; many larger signs are allowed only as part of a developer-approved master plan and usually require planning review. Always confirm the parcel’s plan/zoning and follow the section numbers cited here when preparing sign drawings.
Source References
- § 21.10.280 (Route 66 signage design guidelines) — Glendora Zoning Code.
- § 21.10.390 (Route 66 Corridor sign standards — monument, shopping-center signs, illumination, spacing) — Glendora Zoning Code.
- § 21.11.030 (Diamond Ridge specific plan — land use and sign program, dimensions for pylon/monument/tenant signs) — Diamond Ridge specific plan (Chapter 21.11).
- § 21.08.030 (Glendora commercial specific plan — Glendora Marketplace sign program: freeway pylon, Lone Hill freestanding sign, monument standards) — Glendora commercial specific plan (Chapter 21.08).
- City-specific plan appendices and figure callouts that fix specific sign locations and master development plan parameters (see Chapter 21.08 Appendices and figures). § 21.08.A.010–.040 and related figures.
- For structural/electrical and installation compliance, consult the California Building Standards Code (Title 24). (/us/california/building-codes)
Sources
Retrieved passages
- CBC § 030 High relevance
- CBC § 030 (section of) High relevance
- California Building Code (section of) High relevance
- Glendora Zoning Code (§ 21.10.390.) High relevance
- Glendora Zoning Code High relevance
- Glendora Zoning Code High relevance
- Glendora Zoning Code High relevance
- Glendora Zoning Code High relevance
- Glendora Zoning Code (section of) Medium relevance
- CBC § 425 (section of) Medium relevance
- Glendora Zoning Code (§ 2) Medium relevance
- Glendora Zoning Code (section addresses) Medium relevance
- Glendora Zoning Code (chapter includes) Medium relevance
- Glendora Zoning Code Medium relevance
- Glendora Zoning Code (chapter includes) Medium relevance
- Glendora Zoning Code (§ 2) Medium relevance
Cited sections
- **§ 21.10.280** (Route 66 signage design guidelines) — Glendora Zoning Code. (§ 21.10.280)
- **§ 21.10.390** (Route 66 Corridor sign standards — monument, shopping-center signs, illumination, spacing) — Glendora Zoning Code. (§ 21.10.390)
- **§ 21.11.030** (Diamond Ridge specific plan — land use and sign program, dimensions for pylon/monument/tenant signs) — Diamond Ridge specific plan (Chapter 21.11). (§ 21.11.030)
- **§ 21.08.030** (Glendora commercial specific plan — Glendora Marketplace sign program: freeway pylon, Lone Hill freestanding sign, monument standards) — Glendora commercial specific plan (Chapter 21.08). (§ 21.08.030)
- City-specific plan appendices and figure callouts that fix specific sign locations and master development plan parameters (see Chapter 21.08 Appendices and figures). **§ 21.08.A.010–.040** and related figures. (Chapter 21.08)
- For structural/electrical and installation compliance, consult the California Building Standards Code (Title 24). (/us/california/building-codes) (Title 24)
- Glendora_ZoningCode.md
- 2025 California Building Code.md
Frequently asked questions
Can I put a monument sign in any Route 66 subdistrict?
No — monument signs are allowed in the BG, GCG, RSC, CRR, LHG and TCO subdistricts; they are generally not permitted in TCMU or GLG except for properties fronting Route 66 that comply with the Route 66 sign section. See § 21.10.390.
What is the maximum size for a monument sign in the Route 66 plan?
Monument signs in the Route 66 area are typically limited to 6 ft in height and 40 sq ft per face; exceptions for architectural features require reviewing-body approval. See § 21.10.390.
Do the specific plans allow tall freeway-facing pylons?
Yes — the Glendora Commercial Specific Plan contains project-level allowances (example: a freeway-facing project pylon up to 120 ft and very large face area, located at a specific site corner) but those are tied to the master plan figures and site-specific approvals. See § 21.08.030.
Are animated or flashing signs allowed?
Generally no. The specific-plan sign programs and design guidelines prohibit animated, flashing or audible signs except where a specific tenant (e.g., theater) is explicitly allowed certain treatments; always check the applicable specific plan text (§ 21.08.030, § 21.11.030, § 21.10.280).
How are tenant wall signs limited in multi-tenant buildings?
Specific plans commonly limit tenant signs to a fraction of storefront width (e.g., 70% of storefront width) with letter-height caps (e.g., 3 ft for all-uppercase, 18 in for mixed case) and center placement; major tenants have separate allowances (see § 21.11.030 / Diamond Ridge rules).
Do sign rules require landscaping around the base of freestanding signs?
Yes. Several specific-plan provisions require a landscaped base with the landscaped area equal to twice the area of one face of the sign and a permanent irrigation system to prevent obstruction of copy. See § 21.10.390 and related specific-plan text.
Can I install a rear-facing sign for service/ancillary uses?
Some specific plans allow rear or secondary signs but they are tightly limited (example: 1.5 sq ft per linear foot of leased premises, 150 sq ft max, 48 in height, and often no illumination). Check the Diamond Ridge rear-wall table and your specific plan before assuming illumination is permitted. § 21.11.030.
If my sign exceeds the plan’s height limit, is there a path to approval?
Possibly — many sign-height exceptions require approval by the reviewing body (planning commission or council) and findings that the extra height accommodates desirable architectural features and contributes to quality design. See the exception process in § 21.10.390 and the specific plan implementation language.
Where do I find parking and circulation requirements that might affect sign placement?
Sign placement frequently interacts with parking and driveway sightlines; the specific plans reference parking standards and require signs not to obstruct site lines. See the Route 66 and Diamond Ridge plan sections that address parking and circulation. (/us/california/glendora/parking)
Do I also need building permits besides the planning sign permit?
Yes. Structural supports, electrical wiring for illumination, and any foundations must comply with the California Building Standards Code (Title 24) and require building permits from the Building Division. (/us/california/building-codes)
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