The present invention provides methods and systems for a modular alert system that includes at least two modules having a top portion and a bottom portion. The modules provide an alarm for one or more monitored conditions, and the bottom portion and the top portion of one module contains mating features. A mounting plate that has a top portion and a bottom portion contains mounting features, and the mounting features of the bottom portion correspond to the mounting features of the top portion of one module for forming a selectively secured arrangement. The system may also include at least one speaker housed within the module, and a smoke detector.