Capitalizing Workforce Development Act of 2012 - Amends part A (Temporary Assistance for Needy Families) (TANF) of title IV of the Social Security Act to direct the Secretary of Health and Human Services (HHS) to award competitive grants to support the purchase, renovation, construction, or lease and improvement of real property to be used by qualified self-sustaining job programs that provide job training, job placement, or other employment-related services to individuals with employment challenges.