An automatic lookup tool, which matches and retrieves similar floorplans from a large repository of digitized architectural floorplans can prove to be of immense help for the architects while designing new projects. In this paper, we have proposed a framework for the matching and retrieval of similar architectural floorplans under the query by example paradigm. We propose a room layout segmentation and adjacent room detection algorithm to represent layouts as an undirected graph. We have also proposed a novel graph spectral embedding feature to uniquely represent the layout of the architectural floorplan. This helps in effective and efficient matching of the room layouts. Room semantics in terms of both the room structures and room decor is used to retrieve similar floorplans from the repository. To match the semantic similarity between a pair of floorplans, we have proposed a two stage matching technique. We have validated the effectiveness of our proposed framework by performing experiments on publicly available floorplan dataset and achieved high retrieval accuracy. © 2016 IEEE.