Kemper Development Company | 2,501 followers on LinkedIn. KDC is a premier, family-owned real estate company and a market leader in mixed-use & retail development in the US. | Kemper Development Company is a fifth-generation, family-owned company whose growth has mirrored the astounding boom of the Eastside of Puget Sound. What began as a 16-store shopping center more than 75 years ago has become an internationally renowned hub of life and entertainment, work and leisure, relaxation and pleasure—all at the epicenter of one of the country’s most sophisticated, fastest-growing markets.