Rittenhouse Plaza, Inc. is a residential cooperative located on the northwest corner of 19th and Walnut Street opposite Rittenhouse Square in Philadelphia. The 22-story building was built in 1925-26 and was designed by the architectural firm of McLanahan & Bencker.The rectangular site is approximately 19,500 square feet. The cooperative board and shareholders commissioned a survey and assessment of the entire building envelope, which identified a number of critical issues which needed to be addressed in order to keep the building safe and functional. The $20 million project is following a strategic plan developed by Aegis Property Group which will enable the necessary renovations to take place over a number of years.

Historic courtyard renovation, terrace roof replacements, exterior facade inspection and a roof anchor study were completed in 2009.