The total cost of an intercom system varies extensively depending on the scale, complexity, and technology type, ranging from $100 for a basic DIY wireless smart video doorbell up to $5,000 or more for comprehensive hardwired multi-tenant commercial systems. Professional-grade setups involving multiple sub-masters, weather-resistant door stations, integration with electric strikes, and complex cabling require significant hardware and labor investments. Installation fees, wiring requirements, and enterprise software licenses further influence the final overall project budget.