Sign Regulations in Diamond Bar, California
Diamond Bar, California has specific sign regulations covering 62 sign types across 10 zoning districts. Regulated sign types include Default Sign Standards, Freestanding Monument Sign - General Standards, Wall Sign - General Standards. Height restrictions apply. Permits are required for most commercial signs. Use PermitPal to get instant access to the complete regulations.
Data last verified: December 19, 2025
Sign Regulation Overview for Diamond Bar, California
Sample Sign Requirements in Diamond Bar
| Sign Type | Max Height | Max Area | Setback |
|---|---|---|---|
| Freestanding Monument Sign - General Standards | Per zone-specific limits; general freeway-oriented monument option up to 12 ft (C-3 freeway-adjacent, by CUP) | As approved per zone-specific limits; address plate up to 4 sq ft does not count toward sign face area | Not closer than 25 ft from a property line, except may be up to 10 ft from ultimate street right-of-way line. |
| Wall Sign - General Standards | Below edge of roof | Per zone-specific calculations | — |
| Window Sign - General Standards (Permanent) | — | Up to 25% of each window area (includes permanent and temporary combined) | — |
* Sample data shown. Actual requirements may vary by zone. Use PermitPal for complete, location-specific regulations.
PermitPal Coverage for Diamond BarFull Coverage
Sign Types Covered
62
- Default Sign Standards
- Freestanding Monument Sign - General Standards
- Wall Sign - General Standards
- Window Sign - General Standards (Permanent)
- +2 more types
Zoning Districts
10
Different zoning districts with specific sign regulations
Data Includes
- Permit requirements
- Height restrictions
- Illumination rules
Official Resources for Diamond Bar
Other Cities in California
Frequently Asked Questions
In Diamond Bar, wall signs can be up to Below edge of roof and monument signs are limited to Per zone-specific limits; general freeway-oriented monument option up to 12 ft (C-3 freeway-adjacent, by CUP). Height limits vary by zoning district and sign type. Use PermitPal to get exact requirements for your specific location.
To get a sign permit in Diamond Bar, submit an application to the local building or planning department with sign dimensions, location, and design specifications. Our data confirms permits are required for most commercial signs. Processing typically takes 1-4 weeks. PermitPal helps you identify specific requirements and prepare complete applications.
In Diamond Bar, regulated sign types include Default Sign Standards, Freestanding Monument Sign - General Standards, Wall Sign - General Standards, Window Sign - General Standards (Permanent), and 2 more types. Most commercial signs require permits. Temporary signs and certain small signs may be exempt. Use PermitPal for specific exemptions.
In Diamond Bar, monument signs typically require a Not closer than 25 ft from a property line, except may be up to 10 ft from ultimate street right-of-way line. setback from property lines. Setbacks may increase near residential zones or intersections. Wall signs attached to buildings generally don't have setback requirements. Use PermitPal for location-specific setback data.
Digital and LED signs in Diamond Bar are regulated with specific requirements for brightness, animation, and message duration. Diamond Bar has documented illumination rules in our database. Use PermitPal to see the exact requirements for electronic message centers.
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Diamond Bar, California Sign Rules at a Glance
Diamond Bar, California regulates 62 sign types across 10 zoning districts. Facility Identification (Multi-Family, Condominium, Mobile Home Park) - Walls in the Rural Residential (RR); Low Density Residential (RL); Low/Medium Density Residential (RLM); Medium Density Residential (RM); Medium/High Density Residential (RMH); High Density Residential (RI-I); High Density Residential-30 units/acre (RH-30) zoning district are capped at Below edge of roof tall and Max 16 sq ft, with a Minimum front setback 10 ft; side setback 5 ft setback (Sec. DBMC § 22.36.130, Table 3-14(a), Row 2). Most commercial signs in Diamond Bar require a permit.
Detailed Sign Ordinance Requirements for Diamond Bar, California
Sign Rules by Zoning District in Diamond Bar (10 zones)
| Zoning District | Sign Types Regulated | Max Height | Max Area | Permit Required |
|---|---|---|---|---|
| General Regulations For All Zones | 31 | ≤ 65 ft | ≤ 1,000 sq ft total face area (ERB area ≤ 33% of total) | — |
| Rural Residential (RR); Low Density Residential (RL); Low/Medium Density Residential (RLM); Medium Density Residential (RM); Medium/High Density Residential (RMH); High Density Residential (RI-I); High Density Residential-30 units/acre (RH-30) | 8 | 6 ft | ≤ 24 sq ft each | — |
| Office, Professional (OP); Office, Business (OB); Commercial Office (CO); Neighborhood Commercial (C-1); Community Commercial (C-2); Regional Commercial (C-3); Light Industry (I) | 14 | Below second floor or ≤ 20 ft whichever is less | ≤ 125 sq ft per use | — |
| Agricultural (AG) | 1 | — | — | — |
| Open Space/Conservation (OS) | 1 | — | — | — |
| Recreation (REC) | 1 | — | — | — |
| Specific Plan (SP) | 1 | — | — | — |
| Specific Plan Overlay | 1 | — | — | — |
| Planned Development (PD) | 1 | — | — | — |
| Hotel Overlay (C-3-PD/Hotel) | 5 | ≤ 65 ft | ≤ 1,000 sq ft (ERB portion ≤ 33%) | — |
Zone-by-Zone Sign Requirements in Diamond Bar(sample of 3 of 10 zones)
General Regulations For All Zones
| Sign Type | Max Height | Max Area | Max Width | Setback | Signs Allowed | Location | Permit Required | Premium Details(Illumination, Size Formula, Permit Requirements, Additional Requirements — available with a free PermitPal account) | Ordinance Citation |
|---|---|---|---|---|---|---|---|---|---|
| Freestanding Monument Sign - General Standards | Per zone-specific limits; general freeway-oriented monument option up to 12 ft (C-3 freeway-adjacent, by CUP) | As approved per zone-specific limits; address plate up to 4 sq ft does not count toward sign face area | — | Not closer than 25 ft from a property line, except may be up to 10 ft from ultimate street right-of-way line. | — | Only for frontages adjoining a public street; shall not project over public property, vehicular easements, or rights-of-way; shall not obstruct traffic safety sight areas. | — | Unlock | DBMC § 22.36.120(b)(1)-(6) |
| Freeway-Oriented Freestanding Sign (Fuel/Food/Lodging) | ≤ 25 ft above adjacent street grade or freeway travel lanes (excluding ramps) | Max face: 10 ft (H) × 20 ft (W) per face | ≤ 20 ft | — | 1 per site | Freeway-adjacent site; uses located within 200 ft of freeway ROW; only if wall signage cannot be sited to be visible to freeway motorists both directions. | — | Unlock | DBMC § 22.36.120(c)(1)-(6) |
| Freeway-Oriented Sign with Electronic Reader Board (C-3 only, Commercial Development Complex) | ≤ 65 ft | ≤ 1,000 sq ft total face area (ERB area ≤ 33% of total) | — | — | 1 per commercial development complex | C-3 zone; commercial development complex on parcel(s) totaling ≥ 4.5 acres immediately adjacent to freeway; sign parcel ≥ 1,300 ft from any residential property. | — | Unlock | DBMC § 22.36.120(c)(7)(a)-(f) |
| Real Estate Sign (Single-Family Dwelling) | ≤ 6 ft | ≤ 4 sq ft; plus up to four “open house” signs ≤ 2 sq ft each when agent/owner present | — | — | 1 per street frontage; plus up to 4 open house signs during event | On private property with owner’s permission. | — | Unlock | DBMC § 22.36.050(4)(a)1,5 |
| Real Estate Sign (Multifamily Dwellings) | ≤ 6 ft | ≤ 32 sq ft | — | — | 1 per street frontage | On private property with owner’s permission. | — | Unlock | DBMC § 22.36.050(4)(a)2,5 |
| Real Estate Sign (Individual Commercial/Office/Industrial Property not in a Center/Park) | ≤ 6 ft | ≤ 16 sq ft (Director may allow larger/higher for parcels with >200 ft frontage, freeway orientation, or constrained visibility) | — | — | 1 per street frontage | On private property with owner’s permission. | — | Unlock | DBMC § 22.36.050(4)(a)3,5 |
| Real Estate Sign (Individual Tenant Space within Multitenant Centers/Office Structures/Industrial Subdivisions) | ≤ 6 ft (frontage sign) | Frontage sign: ≤ 16 sq ft; Additional at tenant space: ≤ 6 sq ft | — | — | 1 per street frontage; plus 1 per tenant space available (≤ 6 sq ft) | On private property with owner’s permission. | — | Unlock | DBMC § 22.36.050(4)(a)4-5 |
| Future Tenant Identification Sign (During Construction) | ≤ 6 ft | ≤ 32 sq ft; ≤ 50 sq ft if combined with a construction sign | — | — | 1 per street frontage (plus 1 extra if frontage > 500 ft) | On project site during construction. | — | Unlock | DBMC § 22.36.050(4)(c)1-3 |
Rural Residential (RR); Low Density Residential (RL); Low/Medium Density Residential (RLM); Medium Density Residential (RM); Medium/High Density Residential (RMH); High Density Residential (RI-I); High Density Residential-30 units/acre (RH-30)
| Sign Type | Max Height | Max Area | Max Width | Setback | Signs Allowed | Location | Permit Required | Premium Details(Illumination, Size Formula, Permit Requirements, Additional Requirements — available with a free PermitPal account) | Ordinance Citation |
|---|---|---|---|---|---|---|---|---|---|
| Name Plate or Street Address (Single-Family/Duplex Identification) | Below edge of roof | 1 sq ft | — | — | 1 per dwelling or occupant | Wall, fence, or mailbox | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 1 |
| Facility Identification (Multi-Family, Condominium, Mobile Home Park) - Wall | Below edge of roof | Max 16 sq ft | — | Minimum front setback 10 ft; side setback 5 ft | 1 per facility | On wall | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 2 |
| Facility Identification (Multi-Family, Condominium, Mobile Home Park) - Monument | 4 ft | Max 16 sq ft | — | Minimum front setback 10 ft; side setback 5 ft | 1 per facility | Within required setbacks | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 2 |
| Bed and Breakfast Facility Sign - Wall | Below edge of roof | 4 sq ft max | — | 10 ft minimum front and streetside setback | 1 per facility | On wall | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 3 |
| Bed and Breakfast Facility Sign - Monument | 4 ft | 4 sq ft max | — | 10 ft minimum front and streetside setback | 1 per facility | Within required setbacks | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 3 |
| Religious, Educational, and Governmental Facility Sign - Wall | Below edge of roof | ≤ 16 sq ft (≤ 24 sq ft if frontage ≥ 100 ft) | — | 10 ft minimum front and streetside setback | 1 per street frontage | On wall | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 4 |
| Religious, Educational, and Governmental Facility Sign - Monument | 6 ft | ≤ 16 sq ft (≤ 24 sq ft if frontage ≥ 100 ft) | — | 10 ft minimum front and streetside setback | 1 per street frontage | Within required setbacks | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 4 |
| Subdivision Entry Feature - Monument | ≤ 6 ft | ≤ 24 sq ft each | — | — | 1 per entrance | At subdivision entrance | — | Unlock | DBMC § 22.36.130, Table 3-14(a), Row 5 |
Office, Professional (OP); Office, Business (OB); Commercial Office (CO); Neighborhood Commercial (C-1); Community Commercial (C-2); Regional Commercial (C-3); Light Industry (I)
| Sign Type | Max Height | Max Area | Max Width | Setback | Signs Allowed | Location | Permit Required | Premium Details(Illumination, Size Formula, Permit Requirements, Additional Requirements — available with a free PermitPal account) | Ordinance Citation |
|---|---|---|---|---|---|---|---|---|---|
| Wall Sign - Business Identification (Single-Tenant Site, Not a Center) | Below edge of roof | ≤ 125 sq ft per use | — | — | 1 per building frontage | On building frontage(s) | — | Unlock | DBMC § 22.36.130, Table 3-14(b) A.1; § 22.36.120(g) |
| Monument Sign - Business Identification (Single-Tenant Site) | 6 ft | ≤ 24 sq ft per sign (≤ 32 sq ft if site has ≥ 200 ft of street frontage) | — | 10 ft from property lines or ultimate ROW line (per Table 3-14(b)); general standards also state not closer than 25 ft from a property line except up to 10 ft from ultimate ROW (§ 22.36.120(b)(2)) | 1 per street frontage | Along street frontage | — | Unlock | DBMC § 22.36.130, Table 3-14(b) A.2; § 22.36.120(b) |
| Service Station Monument Sign - Identification and Pricing | 6 ft | ≤ 32 sq ft per sign | — | Shall not block traffic safety area | 1 per use | Visible from street but not blocking traffic safety area | — | Unlock | DBMC § 22.36.130, Table 3-14(b) A.5.b |
| Secondary Tenant Identification (Major Tenant) - Wall | Below second floor or ≤ 20 ft whichever is less | ≤ 20 sq ft per sign; max letter height 18 in | — | — | 4 per building, or 1 per tenant, whichever is less | Near unit entrance | — | Unlock | DBMC § 22.36.130, Table 3-14(b) A.6 |
| Center Identification Monument (Single-Tenant Site also allowed in addition) | 6 ft | ≤ 32 sq ft per sign | — | — | 1 per street frontage | Near main entrance | — | Unlock | DBMC § 22.36.130, Table 3-14(b) A.7; § 22.36.120(b) |
| Center Identification Monument (Multi-Tenant Shopping Center) | 6 ft | ≤ 36 sq ft per sign | — | 10 ft from property lines or ultimate ROW line; shall not block traffic safety area | 1 per street frontage | Set back from property lines/ROW as required | — | Unlock | DBMC § 22.36.130, Table 3-14(b) B.1 |
| Monument Sign - Business Identification for Detached Building >10,000 sq ft GFA (Within 40 ft of Public Street) | 5 ft | ≤ 20 sq ft per sign | — | 10 ft from property lines or ultimate ROW line; shall not block traffic safety area | 1 per street frontage | For business located within 40 ft of public street | — | Unlock | DBMC § 22.36.130, Table 3-14(b) B.2 |
| Wall Sign - Business Identification (Multi-Tenant Shopping Center) (Ground Floor) | Below edge of roof | 30 sq ft minimum and 125 sq ft maximum per use | — | — | 1 per tenant | On tenant’s building frontage | — | Unlock | DBMC § 22.36.130, Table 3-14(b) B.3; § 22.36.120(g) |
PermitPal covers all 10 zoning districts in Diamond Bar — full sign requirements for every zone, plus illumination rules, size formulas, and permit requirements for every sign type — with a free account.
See all 10 zones for Diamond Bar — start freeProhibited Signs in Diamond Bar
- Abandoned or dilapidated signs and sign structures are prohibited citywide.
- Use of live or simulated animals or human beings to attract attention is prohibited.
- Animated, moving, flashing, blinking, reflecting, or revolving signs are prohibited (except time/temperature devices, barber poles, and holiday decorations).
- Banners, streamers, and pennants are prohibited except as specifically allowed under section 22.36.120(f).
- Bench signs are prohibited except at approved bus passenger loading areas.
- Changeable copy signs are prohibited except for civic organizations/institutions, places of worship, movie theaters, or gasoline pricing.
- Electronic reader board signs are prohibited except time/temperature devices and as provided in section 22.36.120(c)(7).
- Inflated signs, balloons, and figures are prohibited except as provided in section 22.36.120(f)(2).
- Neon signs are prohibited except when approved through a comprehensive sign program.
- Obscene or offensive signs are prohibited.
- Off-site signs (including billboards and outdoor advertising) are prohibited unless expressly allowed by this chapter.
- Painted signs on fences, walls, or roofs are prohibited.
- Portable signs are prohibited except as approved through a comprehensive sign program.
- Pole-mounted signs are prohibited.
- Price signs are prohibited except for service stations.
- Projecting signs are prohibited.
- Roof signs that extend above the edge of the roof are prohibited.
- Signs may not interfere with or obstruct fire escapes, exits, standpipes, required ventilators, doors, stairways, or windows above the first story.
- Any sign not in compliance with the sign chapter is prohibited.
- Signs emitting audible sounds, odors, or visible matter are prohibited.
- Signs that conflict with or imitate traffic control devices or that interfere with safe vehicular or pedestrian traffic are prohibited.
- Signs on public property or projecting within the public right-of-way are prohibited, except political signs and signs with a city encroachment permit.
- Strings of lights or signs outlined with individual light bulbs are prohibited.
- Signs attached to or painted on motor vehicles or trailers parked for more than 48 consecutive hours primarily to advertise are prohibited.
- Signs attached to trees are prohibited.
- Permanent “come-on” signs that advertise continuous sales or special prices are not allowed.
- Illuminated signs may not have blinking, flashing, or fluttering lights or changing light intensity, brightness, or color.
- Colored lights may not be used so as to be confused with traffic control devices.
- Reflective-type bulbs and incandescent lamps exceeding 15 watts may not be exposed on sign exteriors facing public rights-of-way or adjacent property.
- Neither direct nor reflected light from primary sources may create a hazard to motor vehicle operators.
- Illumination intensity or brightness may not interfere with the reasonable enjoyment of nearby residential properties.
Exempt Signs in Diamond Bar
- Signs within shopping centers or similar areas that are not visible from any point on the boundary of the premises (permit-exempt).
- Official and legal notices required by a court or governmental agency (permit-exempt).
- Signs erected and maintained in discharge of a governmental function or required by law/regulation, including public utility signs (permit-exempt).
- Signs on licensed commercial vehicles, including trailers (permit-exempt), provided vehicles/trailers are not used as parked/stationary outdoor display signs.
- Bench and other signs located at designated public transit locations (permit-exempt).
- Change of copy within an approved comprehensive sign program that conforms to the program (permit-exempt).
- Occupant name, street number, and street name signs up to 2 square feet per single-family or multifamily unit; address numerals minimum 4 inches (permit-exempt).
- Signs for commercial, office, and industrial uses up to 2 square feet limited to business identification, hours of operation, address, and emergency information (permit-exempt).
- Vehicle-oriented safety and directional signs on private property (no advertising): up to 4 square feet in residential districts and 6 square feet in commercial districts; freestanding height up to 4 feet (permit-exempt; taller may be approved by the director if visibility will not be impaired).
- Affiliation signs for auto-related uses, motels, and hotels (e.g., services provided or required by law, trade affiliations, credit cards accepted) attached to an otherwise approved freestanding sign or structure; up to 0.5 square foot per sign; max six signs per business (permit-exempt).
- Gasoline pump face signs identifying brand, types, and octane rating up to 2 square feet per pump face (permit-exempt).
- Names of structures, commemorative plaques, tablets, dates of construction, etc., in permanent materials; up to 4 square feet area and 5 feet height (permit-exempt).
- Official flags of a nation, the State of California, other states, and municipalities (permit-exempt) subject to pole height limits: 25 feet in residential districts and 35 feet in nonresidential districts; flag length not more than one-fourth of pole height; larger flags may be approved by the director.
- Menu boards for drive-through restaurants: maximum height 6 feet; placed within a landscaped area; only two menu signs allowed per restaurant (permit-exempt).
- Real estate signs offering property for sale, lease, or rent on private property (permit-exempt) subject to limits: single-family (1 per frontage, ≤4 sq ft, 6 ft height; plus up to four 2 sq ft open house signs while agent/owner present), multifamily (1 per frontage, ≤32 sq ft, 6 ft height), individual commercial/office/industrial properties not in centers (1 per frontage, ≤16 sq ft, 6 ft height; larger/higher may be allowed by director for ≥200 ft frontage, freeway orientation, or limited visibility), individual tenant spaces in multitenant centers (1 per frontage, ≤16 sq ft, 6 ft height; plus one ≤6 sq ft sign at tenant space). Signs must be removed within 10 days after sale, lease, or rental.
- Garage or yard sale signs (permit-exempt): ≤3 sq ft; displayed only during the sale; promptly removed at end of sale; not placed on public property, including public utility properties.
- Future tenant identification signs during construction (permit-exempt): 1 per frontage (add one additional sign if frontage exceeds 500 linear feet); ≤32 sq ft and 6 ft height (≤50 sq ft if combined with a construction sign); remove upon occupancy.
- Construction signs naming architects, engineers, and contractors (permit-exempt): 1 per frontage; ≤20 sq ft and 6 ft height (≤32 sq ft if combined with a future tenant sign); remove upon first occupancy.
- Temporary signs placed on public property (permit-exempt) subject to strict limits: no projection over public walkways/alleys/streets except with minimum 7 ft clearance and ≤6 inches projection from building face; not allowed on center medians; must not interfere with construction, maintenance, or facilities (landscape, hardscape, meters, irrigation, etc.); not affixed to trees/plant materials; maximum 6 sq ft sign area; only one sign per side of a single block per idea/event; event-related signs may be placed no more than 30 days prior and must be removed no later than 10 days after the event date.
Sign Plan & Submission Notes for Diamond Bar
- A comprehensive sign program is required for new multitenant developments of three or more separate tenants sharing the same parcel or structure with common access and parking (Sec. 22.36.060(b)(1)).
- A comprehensive sign program is required whenever five or more signs are proposed for a new or existing development (Sec. 22.36.060(b)(2)).
- A comprehensive sign program is required when wall signs are proposed on structures over two stories in height (Sec. 22.36.060(b)(3)).
- A comprehensive sign program is required when a single tenant in an existing multitenant project requests two or more signs and the project is not currently covered by a comprehensive sign program (Sec. 22.36.060(b)(4)).
- The director may require a comprehensive sign program due to special circumstances (e.g., number/size of signs, constrained visibility, location relative to major routes) (Sec. 22.36.060(b)(5)).
- Single-use buildings with 200 feet or more of frontage may use a comprehensive sign program to exceed the maximum aggregate sign area up to 200 sq ft, subject to limits (no single wall sign >125 sq ft; combined signs exceeding 125 sq ft must be separated by at least half the building frontage; overall max 125 sq ft per use unless otherwise stated) (Sec. 22.36.060(c)).
- Neon signs and portable signs are only allowed if approved through a comprehensive sign program (Secs. 22.36.080(9) and 22.36.080(13)).
- Change of copy within an approved comprehensive sign program is exempt from a sign permit (Sec. 22.36.050(1)(f)).
- Minor revisions to a comprehensive sign program may be approved by the director; substantial deviations may require planning commission approval (Sec. 22.36.060(f)).
- Certain freeway-oriented signage (freestanding, electronic reader boards, monument, and wall signs adjacent to the freeway in C-3) requires conditional use permit approval (Sec. 22.36.120(c), (8), (9)).
Source: municode municipal code