BlueLinx (BXC) 10-K 2021 FY Annual report

Exhibit 23.1 Consent of Independent Registered Public Accounting Firm BlueLinx Holdings Inc. Atlanta, Georgia We hereby consent to the incorporation by reference in the Registration Statements on Form S- 3 (File No. 333-234965) and Form S-8 (File No. 333-124721, No. 333-134612, No. 333-151529, No. 333-176130, No. 333-183027, No. 333-211838, No. 333-225444 and No. 333-256642) of BlueLinx Holdings Inc. and subsidiaries of our report dated March 3, 2021, relating to the consolidated financial statements which appear in this Form 10-K. /s/ BDO USA, LLP Atlanta, Georgia February 22, 2022