Due to unsafe and unstable conditions, construction defects in mid-rise buildings have led to unfeasible occupancy. Building demolition is not a viable solution when architectural retrofit strategies can prevent demolition and reconstruction. These strategies are part of sustainable development, aiming to prolong building lifecycles and lifespans. New advanced materials in construction have facilitated the retrofitting of defective building structures. Carbon Fiber Reinforced Polymer (CFRP) and Ultra High-Performance Concrete (UHPC) serve different primary purposes; however, they work together to strengthen building structures. CFRP is effective for tensile strength, while UHPC is advantageous for compressive strength. This paper explains how architectural retrofit strategies can address building defects resulting from workmanship deficiencies that do not meet structural standards, such as improper moulding, concrete mixtures, and steel joint reinforcement. The research employs experimental techniques on a mid-rise building with structural defects to achieve feasible safety and sustainable development through preservation and improvement. Finally, this research explores new technologies and materials to implement retrofit strategies from an architectural perspective.