Little has been written about urban property investment in seventeenth-century London. Market norms for investors were developed in a relatively unregulated environment, and in response to surging urban growth. “Pattern books” (manuals of design, measuring, and building) provided information to investors, helping them to evaluate an assorted set of properties. While the methods of investment described in these books were initially rudimentary, there is evidence of increased sophistication in the latter part of the century. The gradual institutionalizing of real estate practices helped to attract the necessary capital to finance London's remarkable physical growth.