Rapid City, SD Sign Regulations: Digital Billboards (2026)
Key Facts
- Conversion permit
- No new CUP needed, § 17.50.090A.3
- Content limit
- Static messages only, no full motion
- Minimum hold time
- 8 seconds between static messages
- Brightness standard
- § 17.50.080N dimming rule applies
- Governing sections
- §§ 17.50.080O, 17.50.090A.3
Summary
Rapid City lets an existing off-premises sign convert to digital without a new conditional use permit under § 17.50.090A.3, but § 17.50.080O locks any digital, LED or video billboard face to static copy, bans full motion video, and requires an 8-second minimum hold between messages.
O. Existing digital, LED or video type signage. Existing off-premises signs and public purpose signs displaying variable messages through the use of internal illumination technology or through light emitting diodes, liquid crystal displays, plasma image displays, or any other similar light emitting technology may only display static messages. Full motion images, graphics or video are prohibited. Static copy on these signs may be changed at a minimum interval of 8 seconds. ... ... 3. If any zoning district requires a conditional use permit for an off-premises sign, prior to a sign building permit being issued pursuant to § 17.50.080, approval of the conditional use permit must be obtained. A conditional use permit is required for any new off-premises sign. A conditional use permit is not required for any work to an existing or approved off-premises sign, including converting to a digital sign.
Full Breakdown
Rapid City treats digital billboards as a subset of its off-premises sign rules rather than a separate category. 3 says a conditional use permit is required for any new off-premises sign, but is not required for work to an existing or approved off-premises sign, including converting that sign to a digital display; a major amendment to an existing conditional use permit is likewise unnecessary for that conversion as long as the work otherwise complies with Title 17. That lets a billboard owner swap an existing static face for a digital one, or replace the entire digital cabinet, without going back through the Planning Commission for a new conditional use approval.
080O caps what the display can show: existing off-premises signs and public purpose signs using internal illumination, LEDs, LCD, plasma or similar technology may only display static messages, full motion images, graphics or video are prohibited outright, and static copy can change no more often than once every 8 seconds. 1 separately exempts, from the sign building permit itself, maintaining or replacing the digital components or modules on an existing digital sign, including the entire digital cabinet, as long as the change doesn't require other structural modifications. 090B.
Violations & Fines
Showing full motion video, scrolling animation or graphics on a digital billboard, or changing static copy faster than every 8 seconds, violates § 17.50.080O and exposes the sign to removal as unlawful under § 17.50.080C. Converting an off-premises sign to digital without meeting the underlying conditional use and brightness requirements can also draw the city's general penalty under § 1.12.010.
Frequently Asked Questions
Can an existing Rapid City billboard be converted to a digital display?
Can a digital billboard in Rapid City show video or animation?
Do digital billboards in Rapid City have to meet brightness limits?
Sources & Official References
Other rules in Rapid City
Compare Rapid City to another location·View the South Dakota sign regulations overview
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