Guide dogs are widely used by blind and low-vision (BLV) individuals for assistance in navigation, due to their autonomy, safety, and efficiency. However, the cost and responsibility of guide dogs limits access for many. In contrast to their animal counterparts, robot guide dogs offer lower cost, ease of maintenance, and potential for mass production. These advantages make the idea of a robotic guide dog attractive. Existing quadruped robots are either too large for everyday use or cannot traverse obstacles such as stairs. The UMass Dynamic and Autonomous Robotic Systems (DARoS) Lab currently uses the Unitree Go1 robot as their guide dog robot research platform. This setup is unable to climb stairs, limiting its use to flat terrain. For these reasons our team designed and fabricated the body and legs of a lightweight guide dog robot prototype capable of stair climbing, while ensuring a compact body for portability and user-friendliness. Kinematic and dynamic analysis were conducted to optimize leg dimensions and transmission linkages were selected to drive these legs due to their efficiency and ease of control. The body was designed to accommodate the electronics used by the DARoS Lab while remaining smaller than carry-on suitcase dimensions for easy storage. It was also fabricated from plastic and aluminum to lower cost and weight while maximizing durability and modularity. The developed solution provides the DARoS Lab the opportunity to expand their guide dog robot research to include previously inaccessible environments.