An incident unfolds in a parking garage. Someone is assaulted. A medical emergency occurs. The immediate response is to call 911, yet the call will not connect. This scenario is not hypothetical. Facilities managers and technology leaders regularly report persistent signal gaps in below-grade structures. One client described it as a recurring concern: not whether an emergency might happen, but whether communication will function when it does. In environments where safety risks are well documented, failing to address known connectivity deficiencies exposes both occupants and facilities teams to unnecessary risk.
Underground and enclosed parking garages present a persistent challenge for facilities managers responsible for occupant safety and day-to-day operations. Industry crime data has consistently shown that parking environments rank among the most common locations for violent incidents, prompting many facilities to invest in surveillance cameras, emergency intercoms, access control systems, and mobile safety applications. These tools are widely viewed as essential risk mitigation measures. However, their effectiveness depends on a foundational element that is often overlooked: reliable connectivity.
Without dependable cellular and wireless signal coverage, even the most advanced security technologies may fail when they are needed most. Cameras may lose backhaul, intercoms may not connect to monitoring centers, and occupants may be unable to place calls from their mobile devices. For facilities managers, this gap represents both a safety concern and an operational liability.
Why Connectivity Is Unreliable in Parking Garages
Parking garages are among the most radio-frequency-hostile environments in the built world. Reinforced concrete, steel decking, below-grade construction, and narrow sightlines all attenuate cellular signals that originate outdoors. Unlike office floors, garages are rarely designed with connectivity in mind, particularly in older properties where wireless infrastructure was never considered during original construction.
Compounding the issue, garages often house critical safety systems that require constant up-time. Emergency phones, license plate recognition cameras, security call stations, and building automation sensors increasingly rely on IP connectivity. When signal strength is inconsistent or nonexistent, these systems may appear functional during routine checks but fail under real-world conditions, such as during peak occupancy or an emergency event.
Common Misconceptions About Garage Connectivity
A frequent assumption is that if cellular service is acceptable on upper floors or outdoors, it should extend naturally into the garage. In practice, this is rarely the case. Signal penetration decreases rapidly below grade, and coverage can vary significantly even within the same garage, with dead zones occurring near ramps, corners, or elevator lobbies.
Another misconception is that Wi-Fi alone can compensate for poor cellular coverage. While Wi-Fi may support certain applications, it does not replace native cellular service for emergency calling, particularly for visitors or tenants who are not authenticated on the network.
Finally, some facilities rely on anecdotal testing, such as walking the garage with a single phone on a single carrier. This approach provides limited insight and can create a false sense of confidence.
How Facilities Managers Can Test Garage Connectivity
Evaluating connectivity in a parking garage does not require guesswork, but it does require a disciplined process. Testing should be conducted across multiple carriers to reflect real-world usage. Assessments should include both signal strength and usability by placing calls, sending texts, and loading data-intensive applications from multiple locations.
Testing should also be performed at different times, as performance can fluctuate with occupancy and network load. Results should be documented to map consistent coverage, weak signal, and no-service zones. This documentation provides a factual baseline to inform budgeting, planning, and risk discussions.
Indicators That Improvement Is Needed
Repeated reports of dropped calls or inability to place emergency calls are the most obvious warning signs. Less visible indicators include intermittent camera outages, delayed alerts from security devices, or reliance on manual patrols to compensate for technology gaps.
Facilities managers should also reassess connectivity when adding new systems such as cameras, access control points, or electric vehicle charging stations. Increased demand can expose or worsen existing deficiencies.
Options for Improving Connectivity
Localized solutions, such as signal repeaters or small cells, can address limited dead zones but may not scale across large or multi-level garages. More comprehensive approaches include distributed antenna systems (DAS) or similar in-building wireless infrastructure designed to deliver consistent, multi-carrier coverage.
In many cases, connectivity upgrades can be coordinated with broader capital projects, such as garage renovations or security system refreshes, to reduce disruption and improve return on investment.
Balancing Cost, Risk, and Accountability
Connectivity improvements are often evaluated primarily by cost. However, unreliable connectivity also introduces safety, liability, and operational risks. By grounding recommendations in documented testing results, facilities managers can help stakeholders weigh the cost of upgrades against the risk of inaction.
Building Connectivity into Ongoing Facility Strategy
Parking garages should not be treated as an afterthought in connectivity planning. Incorporating garage assessments into routine inspections and security audits helps ensure that deficiencies are identified early. Reliable connectivity is now a prerequisite for effective safety operations. In parking environments, ensuring that communications work as intended is a fundamental responsibility.
Craig Gillespie is the CEO of Airtower Networks, which designs, installs, and operates custom 5G cellular, Wi-Fi, private LTE, and emergency responder radio networks across various industries. Gillespie has been active in the real estate and facilities management markets for more than 20 years, specializing in technology and services. Before joining Airtower, he served as managing director of MRI Software’s Occupier division. Previously, he was the CEO of Manhattan Software.