Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-220507 on Form S-8 and Registration Statement No. 333-226023 on Form S-3 of our reports dated February 23, 2021, relating to the financial statements of JBG SMITH Properties, and the effectiveness of JBG SMITH Properties’ internal control over financial reporting, appearing in this Annual Report on Form 10-K of JBG SMITH Properties for the year ended December 31, 2020.

/s/ Deloitte & Touche LLP

McLean, Virginia

February 23, 2021