Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements (Form S-8 Nos. 333-129273, 333-168179, 333-197521 and 333-212521) pertaining to the 401(k) Savings Plan of KB Home of our report dated June 12, 2020, with respect to the financial statements and schedule of the KB Home 401(k) Savings Plan included in this Annual Report (Form 11-K) for the year ended December 31, 2019.

/s/ Ernst & Young LLP

Los Angeles, California

June 12, 2020

16