Exhibit 5.1

June 25, 2021
Apogee Enterprises, Inc.
4400 West 78th Street - Suite 520
Minneapolis, Minnesota 55435
Re: Registration Statement on Form S-8
Ladies and Gentlemen:
We have acted as counsel to Apogee Enterprises, Inc., a Minnesota corporation (the “Company”), in connection with a Registration Statement on Form S-8 (the “Registration Statement”) relating to the registration of the offer and sale by the Company of up to 1,000,000 shares (the “Shares”) of common stock, $0.33 1/3 par value per share, of the Company pursuant to the Apogee Enterprises, Inc. 2019 Stock Incentive Plan, as Amended and Restated (2021) (the “Plan”).
We have examined such documents and have reviewed such questions of law as we have considered necessary or appropriate for the purposes of our opinions set forth below. In rendering our opinions set forth below, we have assumed the authenticity of all documents submitted to us as originals, the genuineness of all signatures and the conformity to authentic originals of all documents submitted to us as copies. We have also assumed the legal capacity for all purposes relevant hereto of all natural persons. As to questions of fact material to our opinions, we have relied upon certificates or comparable documents of officers and other representatives of the Company and of public officials.
Based on the foregoing, we are of the opinion that the Shares, when issued and delivered in accordance with the terms of the Plan, will be validly issued, fully paid and non-assessable.
Our opinions expressed above are limited to the laws of the State of Minnesota.
We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. In giving this consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission thereunder.
Sincerely,
/s/ Dorsey & Whitney LLP
RAR:skb
50 South Sixth Street | Suite 1500 | Minneapolis, MN | 55402-1498 | T 612.340.2600 | F 612.340.2868 | dorsey.com