Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-1 filed pursuant to Rule 462(b) of the Securities Act of 1933 of our report dated March 15, 2017, relating to the financial statements and financial statement schedule of SiteOne Landscape Supply, Inc. and subsidiaries (the “Company”) appearing in the Annual Report on Form 10-K of the Company for the year ended January 1, 2017, and to the reference to us under the heading “Experts” in the Prospectus, which is part of the Registration Statement on Form S-1 (File No. 333-217327).

/s/ Deloitte & Touche LLP

Atlanta, Georgia

April 25, 2017