The growing demand for precise and accurate measurement systems in space missions has stimulated the development of innovative solutions in the field of accelerometers, capable of delivering high sensitivity and low noise over a wide frequency range. To achieve these requirements, an accelerometer based on a mass–spring system with a low natural frequency is needed, since both acceleration noise and sensitivity are related to the square of the natural frequency. This thesis addresses this challenge through the design, prototyping, and testing of an elastic suspension for a new accelerometer architecture intended for space applications, employing a heterodyne laser interferometry readout to detect the displacements of the proof mass.