This series contains the official financial records of John McShain, Inc., as well as John McShain's personal financial statements. Trial balances (1935-1951) document work on most major Washington and Philadelphia projects. Statements for John McShain, Inc., of Philadelphia are complete for the years 1934-1947 and 1960-1979. Statements for John McShain, Inc., of Trenton document the years 1938-1947 and 1960-1974. Similarly statements for John McShain, Inc., of Maryland contain data for the years 1938-1946 and 1960-1975.

Personal financial statements, 1935-1981, include bound financial statements prepared by John McShain's accountant as well as statements of receipts and disbursements prepared by office personnel. McShain's own calculations are included in these volumes. Unfortunately, the statements for the 1940s and 1950s are missing. The series also includes financial records from John McShain's hotels, Barclay Stables, Killarney estates, and other corporate interests. The Columbia Plaza records contain financial documents relating to the changeover from a single owner corporation to limited partnership.