Berkshire Hathaway (BRK-B) 10-K 2014 FY Annual report

Reg. S-K

Item 601

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-186257 on Form S-3 and Registration Statement Nos. 333-53046, 333-64284, 333-70609, 333-74312, 333-75612, 333-101662,333-164961, 333-164959, 333-164958, 333-111614, 333-179855 and 333-194948 on Form S-8 of our reports dated February 27, 2015, relating to the consolidated financial statements and financial statement schedule of Berkshire Hathaway Inc., and the effectiveness of Berkshire Hathaway Inc.’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Berkshire Hathaway Inc. for the year ended December 31, 2014.

/s/ Deloitte & Touche LLP

Omaha, Nebraska

February 27, 2015