EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the KB Home 2014 Equity Incentive Plan, the Third Amended and Restated KB Home Non-Employee Directors Compensation Plan, and the KB Home 401(k) Savings Plan of our reports dated January 24, 2014, with respect to the consolidated financial statements of KB Home and the effectiveness of internal control over financial reporting of KB Home included in its Annual Report (Form 10-K) for the year ended November 30, 2013, filed with the Securities and Exchange Commission.

/s/ ERNST & YOUNG LLP

Los Angeles, California

July 17, 2014