Sign Regulations in Caldwell, Idaho
Caldwell, Idaho has specific sign regulations covering 26 sign types across 21 zoning districts. Regulated sign types include Freestanding Monument Sign, Window Signs, Freeway-Oriented Pole Sign (Billboard) — I-84 Frontage. Height restrictions apply. Permits are required for most commercial signs. Use PermitPal to get instant access to the complete regulations.
Data last verified: May 26, 2026
Sign Regulation Overview for Caldwell, Idaho
Sample Sign Requirements in Caldwell
| Sign Type | Max Height | Max Area | Setback |
|---|---|---|---|
| General — Permit Requirement (All Signs) | — | — | Minimum 3 ft from property line for all permanent signs; no part (including base/footings) may encroach into required setback. No sign over 3 ft high may be within any vision triangle. Freestanding pole signs (where permitted) require 30 ft minimum setback from all property lines and 1,000 ft minimum separation from other pole signs (see district-specific allowances). |
| General — Measurement & Placement Rules | — | — | 3 ft min from property lines; pole signs 30 ft min setback and separation where permitted; no sign over 3 ft tall within any vision triangle. |
| General — Temporary Signs & Banners | — | Commercial/industrial/special purpose: one banner up to 32 sq ft per property or storefront. | — |
* Sample data shown. Actual requirements may vary by zone. Use PermitPal for complete, location-specific regulations.
PermitPal Coverage for CaldwellFull Coverage
Sign Types Covered
26
- Freestanding Monument Sign
- Window Signs
- Freeway-Oriented Pole Sign (Billboard) — I-84 Frontage
- Building Signs (Wall/Hanging/Suspended/Projecting)
- +2 more types
Zoning Districts
21
Different zoning districts with specific sign regulations
Data Includes
- Permit requirements
- Height restrictions
- Illumination rules
Official Resources for Caldwell
Other Cities in Idaho
Frequently Asked Questions
Sign height limits in Caldwell vary by zone and sign type. Wall signs typically range from 25-40 feet, while monument signs are usually limited to 6-10 feet. Use PermitPal to get exact requirements for your property.
To get a sign permit in Caldwell, 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 Caldwell, regulated sign types include Freestanding Monument Sign, Window Signs, Freeway-Oriented Pole Sign (Billboard) — I-84 Frontage, Building Signs (Wall/Hanging/Suspended/Projecting), and 2 more types. Most commercial signs require permits. Temporary signs and certain small signs may be exempt. Use PermitPal for specific exemptions.
Sign setback requirements in Caldwell vary by zone and sign type, typically ranging from 5-15 feet from property lines. Use PermitPal for specific setback requirements at your location.
Digital and LED signs in Caldwell are regulated with specific requirements for brightness, animation, and message duration. Caldwell has documented illumination rules in our database. Use PermitPal to see the exact requirements for electronic message centers.
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Caldwell, Idaho Sign Rules at a Glance
Caldwell, Idaho regulates 26 sign types across 21 zoning districts. Freestanding Monument Signs in the Neighborhood Commercial (C-1) zoning district are capped at Private/local road: 10 ft; Minor collector: 15 ft; Minor arterial: 15 ft; Major collector: 20 ft; Major arterial: 20 ft; Hwy/Interstate: 40 ft tall and Private/local road: 24 sq ft; Minor collector: 32 sq ft; Minor arterial: 32 sq ft; Major collector: 48 sq ft; Major arterial: 48 sq ft; Hwy 55/20-26/I-84 frontage: 60 sq ft, with a ≥3 ft from property line; maintain vision triangles. setback (Sec. 10-02-06-8(2)A, Table 10-02-06-8 (C-1 column) and notes). Most commercial signs in Caldwell require a permit.
Detailed Sign Ordinance Requirements for Caldwell, Idaho
Sign Rules by Zoning District in Caldwell (21 zones)
| Zoning District | Sign Types Regulated | Max Height | Max Area | Permit Required |
|---|---|---|---|---|
| General Regulations For All Zones | 4 | — | Commercial/industrial/special purpose: one banner up to 32 sq ft per property or storefront. | — |
| RS-1 Semi-Rural Residential - 1 (R-S-1) | 4 | 15 ft; must not exceed roofline height of the tallest building served | 60 sq ft per sign face | — |
| RS-2 Semi-Rural Residential - 2 (R-S-2) | 4 | 15 ft; not higher than tallest building roofline it serves | 60 sq ft | — |
| Neighborhood Residential (R-1) | 4 | 15 ft and not above roofline of tallest building it serves | 60 sq ft | — |
| Community Residential (R-2) | 4 | 15 ft; not above tallest served roofline | 60 sq ft | — |
| Urban Residential (R-3) | 4 | 15 ft (not over roofline of tallest building served) | 60 sq ft | — |
| Neighborhood Commercial (C-1) | 6 | 60 ft (max) | 672 sq ft (max) | — |
| Community Commercial (C-2) | 7 | 60 ft | 672 sq ft | — |
| General Commercial (C-3) | 7 | 60 ft | 672 sq ft | — |
| Service Commercial (C-4) | 6 | 60 ft | 672 sq ft | — |
| Mixed Use / Regional Commercial (H-C) | 6 | 60 ft | 672 sq ft | — |
| General Industrial (M-1) | 6 | 60 ft | 672 sq ft | — |
| Heavy Industrial (M-2) | 6 | 60 ft | 672 sq ft | — |
| Industrial and Business Park (I-P) | 6 | 60 ft | 672 sq ft | — |
| Downtown City Center (D-CC) | 1 | — | — | — |
| Downtown Central Business (D-CB) | 1 | — | — | — |
| Downtown Transition Neighborhood (T-N) | 4 | 15 ft; not higher than tallest building roofline it serves | 60 sq ft per entry sign | — |
| Airport District (A-D) | 6 | 50 ft | 672 sq ft | — |
| College District (C-D) | 6 | 50 ft | 672 sq ft | — |
| Healthcare District (H-D) | 6 | 50 ft | 672 sq ft | — |
| Public District (P-D) | 6 | 50 ft | 672 sq ft | — |
Zone-by-Zone Sign Requirements in Caldwell(sample of 3 of 21 zones)
Neighborhood Commercial (C-1)
| 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 | Private/local road: 10 ft; Minor collector: 15 ft; Minor arterial: 15 ft; Major collector: 20 ft; Major arterial: 20 ft; Hwy/Interstate: 40 ft | Private/local road: 24 sq ft; Minor collector: 32 sq ft; Minor arterial: 32 sq ft; Major collector: 48 sq ft; Major arterial: 48 sq ft; Hwy 55/20-26/I-84 frontage: 60 sq ft | — | ≥3 ft from property line; maintain vision triangles. | 1 per frontage (plus 1 extra if frontage >300 ft); additional 60% area signs at vehicular entrances for centers/parks | On private property; ≥3 ft setback; not in vision triangle. Not to exceed 25 ft height when adjacent to a residential neighborhood. | — | Unlock | 10-02-06-8(2)A, Table 10-02-06-8 (C-1 column) and notes |
| Electronic Message Center (part of a Monument Sign) — Special Use Permit | As part of the parent monument allowance | EMC portion ≤25% of the permitted monument sign copy area | — | Per parent monument sign. | 1 EMC/changeable copy sign per property (via SUP) | On the monument sign at permitted locations and setbacks. | — | Unlock | 10-02-06-8(2)B(1)-(2)(A); 10-02-06-2(2) |
| Building Signs (Wall / Hanging / Suspended / Projecting) | — | Aggregate building sign area ≤20% of the wall area where mounted | — | — | Multiple allowed up to 20% wall area | Affixed to building walls/facades of commercial uses. | — | Unlock | 10-02-06-8(2)D |
| Awning Sign | — | Copy area on awning faces ≤20% of overall awning square footage; valance only for primary copy | — | — | 1 per street frontage | On the awning valance (face/side content allowed within 20% copy area cap). | — | Unlock | 10-02-06-8(2)E |
| Window Signs | — | ≤25% of the window area on each building facade | — | — | — | Inside or on surface of windows with street or alley frontage. | — | Unlock | 10-02-06-8(2)F |
| Freeway-Oriented Pole Sign (Billboard) — I-84 Frontage | 60 ft (max) | 672 sq ft (max) | — | 30 ft min setback; 1,320 ft min separation. | Max 1 freeway-oriented pole sign per eligible parcel | Only on commercial/industrial/public/semi-public/institutional parcels located within 500 ft of the I-84 Interstate right-of-way. | — | Unlock | 10-02-06-8(2)C |
Community Commercial (C-2)
| 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 | Private/local: 15 ft; Minor collector: 20 ft; Minor arterial: 20 ft; Major collector: 25 ft; Major arterial: 25 ft; Hwy/Interstate: 40 ft | Private/local: 24 sq ft; Minor collector: 32 sq ft; Minor arterial: 32 sq ft; Major collector: 48 sq ft; Major arterial: 60 sq ft; Hwy/Interstate frontage: 100 sq ft | — | ≥3 ft; clear of vision triangles. | 1 per frontage (+1 if frontage >300 ft); entrance signs at 60% area allowed | On private property; not within vision triangles; ≤25 ft height when adjacent to a residential neighborhood. | — | Unlock | 10-02-06-8(2)A, Table 10-02-06-8 (C-2 & C-3 column) notes 1-3 |
| Electronic Message Center (part of Monument) — Special Use Permit | — | EMC area ≤25% of the permitted monument copy area | — | Per parent monument. | 1 EMC/changeable copy sign per parcel (via SUP) | Same as parent monument. | — | Unlock | 10-02-06-8(2)B(1)-(2)(B) |
| Building Signs (Wall/Hanging/Suspended/Projecting) | — | ≤20% of wall area per elevation used | — | — | Multiple allowed up to 20% wall area | On building walls. | — | Unlock | 10-02-06-8(2)D |
| Awning Sign | — | Copy area ≤20% of awning area; valance height ≤18 in | — | — | 1 per frontage | Awning valance; content may be on face/sides within 20% limit. | — | Unlock | 10-02-06-8(2)E |
| Window Signs | — | ≤25% of window area per facade | — | — | — | Windows facing street or alley. | — | Unlock | 10-02-06-8(2)F |
| Freeway-Oriented Pole Sign (Billboard) — I-84 Frontage | 60 ft | 672 sq ft | — | 30 ft min; 1,320 ft separation. | 1 per eligible parcel | Parcel within 500 ft of I-84 ROW. | — | Unlock | 10-02-06-8(2)C |
| Vehicle Small Flags (Auto Sales/Rental Lots) | No more than 2 ft above vehicle height as displayed at grade | ≤1 sq ft per flag | — | — | 1 per displayed vehicle | Attached to displayed vehicles on the lot. | — | Unlock | 10-02-06-8(2)G |
General Commercial (C-3)
| 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 | Private/local: 15 ft; Minor collector: 25 ft; Minor arterial: 20 ft; Major collector: 25 ft; Major arterial: 25 ft; Hwy/Interstate: 40 ft | Private/local: 24 sq ft; Minor collector: 32 sq ft; Minor arterial: 32 sq ft; Major collector: 48 sq ft; Major arterial: 60 sq ft; Hwy/Interstate frontage: 100 sq ft | — | ≥3 ft; clear vision triangles. | 1 per frontage (+1 if >300 ft); extra at entrances (60% area) | On private property; not in vision triangles; ≤25 ft high when adjacent to a residential neighborhood. | — | Unlock | 10-02-06-8(2)A, Table 10-02-06-8 (C-2 & C-3) |
| Electronic Message Center (part of Monument) — Special Use Permit | — | ≤25% of permitted monument copy area | — | Per monument sign. | 1 EMC/changeable copy per site (via SUP) | On the monument sign. | — | Unlock | 10-02-06-8(2)B |
| Building Signs (Wall/Hanging/Suspended/Projecting) | — | ≤20% of wall area | — | — | Multiple up to 20% wall area | On building walls. | — | Unlock | 10-02-06-8(2)D |
| Awning Sign | — | Copy ≤20% of awning area; valance ≤18 in | — | — | 1 per frontage | Awnings on street frontages. | — | Unlock | 10-02-06-8(2)E |
| Window Signs | — | ≤25% of window area per facade | — | — | — | Windows on street or alley frontage. | — | Unlock | 10-02-06-8(2)F |
| Freeway-Oriented Pole Sign (Billboard) — I-84 Frontage | 60 ft | 672 sq ft | — | 30 ft min; 1,320 ft min separation | 1 per eligible parcel | Parcel within 500 ft of I-84 ROW. | — | Unlock | 10-02-06-8(2)C |
| Vehicle Small Flags (Auto Sales/Rental Lots) | ≤2 ft above vehicle height at grade display | ≤1 sq ft per flag | — | — | 1 per vehicle | Attached to vehicles on display. | — | Unlock | 10-02-06-8(2)G |
PermitPal covers all 21 zoning districts in Caldwell — full sign requirements for every zone, plus illumination rules, size formulas, and permit requirements for every sign type — with a free account.
See all 21 zones for Caldwell — start freeProhibited Signs in Caldwell
- Pole signs, except freeway-oriented pole signs permitted under the code
- Roof and roof-supported signs
- Wall signs that extend above the parapet wall
- Temporary signs placed within landscaped areas on commercial, industrial, public, semi-public, or institutional properties, or otherwise placed into the ground
- Any sign that blocks the ADA-required minimum sidewalk width
- Mechanically moving signs or displays with actual motion (e.g., searchlights, beacons, strobe lights, streamers, spinners, pennant strings, scintillating lights, similar lights)
- Dynamic signage including moving, revolving, intermittent, oscillating, animated, or flashing signs
- Inflatable signs and other permanent inflated objects (balloons only allowed for temporary non-commercial residential special occasions)
- Signs that imitate or may be confused with traffic control signs/signals/devices or emergency vehicle lights
- Simulated traffic signs or signs that obstruct authorized traffic signs/signals, sight-distance triangles, or extend into the public right-of-way
- Signs within street or highway rights-of-way, except authorized public signs (subject to immediate removal)
- Posters, handbills, and similar signs tacked, pasted, taped, or affixed to trees, poles, fences, hydrants, bridges, or similar structures (except private property warning signs)
- Display of items for sale within any landscape area or required parking area
- Signs attached to trailers or vehicles that are permanently parked along public highways/streets or within the right-of-way
- Highly reflective or fluorescent signs unless required by the Fire Department
- Signs on benches and shelters, except those installed/approved by public transit or city authority through the permitting process (illegally attached signage removed)
- Dilapidated, deteriorated, or unsightly signs
- Abandoned signs
- Rotating signs
- Sandwich board/A-frame/wheeled signs, except where specifically allowed elsewhere in the code
- Pennant strings, streamers, spinners, propellers, search lights, and other similar mechanically moving signs
- Any sign in violation of the sign chapter
- Any sign in violation of local, state, or federal law over which the city has jurisdiction
- Any sign without a required permit/approval or with an expired permit/approval
Exempt Signs in Caldwell
- Public regulation and information signs (may be permitted in the public right-of-way upon City Traffic Commission authorization)
- Curb addresses and private street numbers (may be permitted in the public right-of-way upon authorization)
- Signs erected by public service companies for safety purposes (may be permitted in the public right-of-way upon authorization)
- Public signs by government agencies or utilities, including traffic, utility, safety, railroad crossing, identification, and informational signs for public facilities (may be permitted in the public right-of-way upon authorization)
- Official notices issued by any court, public agency, or officer (may be permitted in the public right-of-way upon authorization)
- Signs required by local, state, or federal law (may be permitted in the public right-of-way upon authorization)
- Security and warning signs on private property (e.g., no trespassing, no hunting, no soliciting, safety warnings) (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Flags of any country, state, or unit of local government (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Flagpoles (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Internal traffic directional signs less than 3 square feet (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Holiday decorations and signs of a decorative nature incidental to national, local, or religious holidays (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Signs being carried by people (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Handicap parking space signs per federal law (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Private drive signs not exceeding 2 square feet in area (not permitted within or over the public right-of-way; must meet vision triangle rules)
- Any sign deemed appropriate by the Director consistent with the section (not permitted within or over the public right-of-way; must meet vision triangle rules)
Source: amlegal municipal code