Attached files

file filename
10-K - FORM 10-K - UNITIL CORPd499165d10k.htm
EX-99.1 - EX-99.1 - UNITIL CORPd499165dex991.htm
EX-32.1 - EX-32.1 - UNITIL CORPd499165dex321.htm
EX-31.3 - EX-31.3 - UNITIL CORPd499165dex313.htm
EX-31.2 - EX-31.2 - UNITIL CORPd499165dex312.htm
EX-31.1 - EX-31.1 - UNITIL CORPd499165dex311.htm
EX-21.1 - EX-21.1 - UNITIL CORPd499165dex211.htm
EX-12.1 - EX-12.1 - UNITIL CORPd499165dex121.htm
EX-11.1 - EX-11.1 - UNITIL CORPd499165dex111.htm

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-168394, and 333-221333 on Form S-3 and Nos. 333-184849 and 333-42266 on Form S-8 of our report dated February 1, 2018, relating to the consolidated financial statements of Unitil Corporation and subsidiaries and the effectiveness of Unitil Corporation and subsidiaries’ internal control over financial reporting, appearing in this Annual Report on Form 10-K of Unitil Corporation for the year ended December 31, 2017.

/s/ Deloitte and Touche LLP

February 1, 2018

Boston, Massachusetts