Burnt bricks are a predominant material in constructions in India and many other countries globally. The inherent resilience and longevity of brick structures make them suitable for repair and further strengthening. Several procedures are already in practice for the preservation and enhancement of seismic performance in existing masonry structures. One notable method, rooted in history and now under exploration, is the semiconfinement of existing masonry structures with horizontal and vertical reinforced concrete (RC) elements. This method exhibits all the characteristics of an effective retrofitting technique. Most importantly, it has been found to improve ductility and showcase enhanced seismic performance. In this context, two existing masonry constructions at the Structural Engineering Laboratory of IIT Kanpur are considered. These structures, having undergone cyclic testing, include one without any reinforcement (or control masonry) and the other retrofitted with semiconfining horizontal and vertical RC elements (strengthened masonry or retrofitted masonry). Both structures experienced crack formation during testing, with distinct characteristics reflecting their unique structural behaviors. These cracks were sealed using grouting, requiring minimal material and a “light” application. The primary objective of this study is to assess the behavior of these repaired buildings through condition assessment techniques and subsequent testing. For this purpose, accelerometers were installed at various locations, and Experimental Modal Analysis (EMA) was considered by shaker tests. The assessment of dynamic behavior in these structures will facilitate further studies on retrofitting the control masonry and enhancing the scheme of retrofitting or strengthening for improved performance.