Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-4 of our
reports dated February 28, 2007, relating to the consolidated financial statements and financial
statement schedule of Berkshire Hathaway Inc. (which report expresses an unqualified opinion and
includes an explanatory paragraph relating to the change in the Companys accounting for pension
and other postretirement benefits to conform to Statement of Financial Accounting Standards No.
158, Employers Accounting for Defined Benefit Pension and Other Postretirement Plans, an amendment
of FASB Statements No. 87, 88, 106, and 132(R)) and managements report on the effectiveness of
internal control over financial reporting, appearing in the Annual Report on Form 10-K of Berkshire
Hathaway Inc. for the year ended December 31, 2006 and to the reference to us under the headings
Experts in the Prospectus, which is part of this Registration Statement.
DELOITTE &
TOUCHE LLP
Omaha, Nebraska
June 7, 2007