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September 25, 2012

Board of Directors

Agree Realty Corporation

31850 Northwestern Highway

Farmington Hills, Michigan 48334

Re: Universal Shelf Registration Statement on Form S-3

Gentlemen:

We have served as special counsel to Agree Realty Corporation, a Maryland corporation (the “Company”), in connection with the Registration Statement on Form S-3 (the “Registration Statement”), to be filed on the date hereof by the Company with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Securities Act”). The Registration Statement relates to the issuance and sale from time to time by the Company of common stock of the Company, par value $0.0001 per share (the “Common Stock”), preferred stock of the Company, par value $0.0001 per share (the “Preferred Stock”), depository shares evidenced by receipts representing fractional interests in Preferred Stock (the “Depository Shares”), warrants to purchase shares of Common Stock or Preferred Stock (the “Warrants”), and rights to purchase shares of Series A Participating Preferred Stock of the Company, which are attached to all shares of Common Stock issued (the “Preferred Stock Purchase Rights” and, together with the Common Stock, the Preferred Stock, the Depositary Shares and the Warrants, the “Offered Securities”), having an aggregate maximum offering price of $250,000,000. The Offered Securities may be issued and sold from time to time in multiple transactions pursuant to Rule 415 of the General Rules and Regulations promulgated under the Securities Act and as set forth in the Registration Statement, any amendments thereto, the prospectus contained therein and any amendments or supplements thereto.

Depositary Shares will be issued under one or more Deposit Agreements (each, a “Deposit Agreement”) between the Company and the depositary party thereto (the “Depositary”), substantially in the form to be filed as an exhibit to a post-effective amendment to the Registration Statement or as an exhibit to a document filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and incorporated into the Registration Statement by reference. Any Warrants will be evidenced by a warrant certificate and issued pursuant to one or more warrant agreements (each, a “Warrant Agreement”) between the Company and the warrant agent party thereto substantially in the form to be filed as an exhibit to a post-effective amendment to the Registration Statement or as an exhibit to a document filed under the Exchange Act and incorporated into the Registration Statement by reference.

ATLANTA AUSTIN BANGKOK BEIJING BRUSSELS CHARLOTTE DALLAS HOUSTON LONDON LOS ANGELES

McLEAN MIAMI NEW YORK NORFOLK RALEIGH RICHMOND SAN FRANCISCO TOKYO WASHINGTON

www.hunton.com

Board of Directors

Agree Realty Corporation

September 25, 2012

Page 2

In connection with our representation of the Company, and as a basis for the opinion hereinafter set forth, we have examined originals, or copies certified or otherwise identified to our satisfaction, of the following documents:

(a) the Registration Statement and the related base prospectus included therein in the form in which it was filed with the Commission under the Securities Act;

(b) the Company’s Articles of Incorporation, as amended, as certified by the State Department of Assessments and Taxation of the State of Maryland (the “SDAT”) on April 13, 2010 and by the Secretary of the Company on the date hereof (the “Articles of Incorporation”);

(c) the Company’s Articles Supplementary to the Articles of Incorporation dated as of September 21, 2012, as filed with the SDAT on September 21, 2012 and certified by the Secretary of the Company on the date hereof (together with the Articles of Incorporation, the “Charter”);

(d) the Bylaws of the Company, as amended, as certified by the Secretary of the Company on the date hereof (the “Bylaws”);

(e) the form of certificate representing a share of Common Stock, as certified by the Secretary of the Company on the date hereof;

(f) the resolutions adopted by the board of directors (the “Board”) of the Company at a special meeting on August 17, 2012, relating to, among other things, the registration, issuance and sale of the Offered Securities, as certified by the Secretary of the Company on the date hereof;

(g) an executed copy of the certificate of the Secretary of the Company, dated the date hereof, as to certain factual matters; and

Board of Directors

Agree Realty Corporation

September 25, 2012

Page 3

(h) the certificate of the SDAT as to the due incorporation, existence and good standing of the Company in the State of Maryland dated September 20, 2012 (the “Good Standing Certificate”).

For purposes of the opinion expressed below, we have assumed (i) the authenticity of all documents submitted to us as originals, (ii) the conformity to the originals of all documents submitted as certified or photostatic copies and the authenticity of the originals thereof, (iii) the legal capacity of natural persons, (iv) the genuineness of all signatures and (v) the due authorization, execution and delivery of all documents by all parties and the validity and binding effect and enforceability thereof upon the Company.

As to factual matters, we have relied upon representations included in certificates of officers of the Company and in certificates of public officials.

Based upon the foregoing, and having regard for such legal considerations as we have considered necessary for purposes hereof, we are of the opinion that:

1. The Company is a corporation duly incorporated and existing under and by virtue of the laws of the State of Maryland and is in good standing with the SDAT, and has the requisite corporate power and authority to issue the Offered Securities.

2. With respect to the Common Stock, (a) when the terms of the issuance and the sale of the Common Stock have been duly established in conformity with the Charter and the Bylaws and (b) when the Common Stock has been duly issued and sold as contemplated by the Registration Statement (as declared effective by the Commission), the prospectus contained therein and any applicable prospectus supplement, and if all the foregoing actions are taken pursuant to the authority granted by the Board, or a duly authorized committee thereof, and so as not to violate any applicable law or result in a default under or breach of any agreement or instrument binding upon the Company and so as to comply with any requirement or restriction imposed by any court or governmental body having jurisdiction over the Company, and the Company has received full payment therefor in accordance with the authorization of the Board, or a duly authorized committee thereof, then the Common Stock, and the Preferred Stock Purchase Rights attached thereto, will be validly issued, fully paid and non-assessable.

Board of Directors

Agree Realty Corporation

September 25, 2012

Page 4

3. With respect to the Preferred Stock, (a) when the terms of the particular class or series of Preferred Stock and of the issuance and sale of such Preferred Stock have been duly established in conformity with the Charter and the Bylaws, (b) with respect to a particular class or series of Preferred Stock, when Articles Supplementary have been duly filed with and accepted for record by the SDAT establishing the relative powers, designations, preferences, rights, qualifications, limitations or restrictions of such Preferred Stock, and (c) when such class or series of Preferred Stock has been duly issued and sold as contemplated by the Registration Statement (as declared effective by the Commission), the prospectus contained therein and any applicable prospectus supplement, and if all the foregoing actions are taken pursuant to the authority granted by the Board, or a duly authorized committee thereof, and so as not to violate any applicable law or result in a default under or breach of any agreement or instrument binding upon the Company and so as to comply with any requirement or restriction imposed by any court or governmental body having jurisdiction over the Company, and the Company has received full payment therefor in accordance with the authorization of the Board, or a duly authorized committee thereof, the Preferred Stock will be validly issued, fully paid and non-assessable.

4. With respect to the Depositary Shares, (a) when the terms of the particular class or series of Preferred Stock represented by the Depositary Shares and of the issuance and sale of such Depositary Shares have been duly established in conformity with the Charter and the Bylaws, (b) with respect to a particular class or series of Preferred Stock represented by Depositary Shares, when Articles Supplementary have been duly filed with and accepted for record by the SDAT establishing the relative powers, designations, preferences, rights, qualifications, limitations or restrictions of such Preferred Stock and (c) when the Depositary Shares have been duly issued and sold as contemplated by the Registration Statement (as declared effective by the Commission), the prospectus contained therein and any applicable prospectus supplement, and if all the foregoing actions are taken pursuant to the authority granted by the Board, or a duly authorized committee thereof, and so as not to violate any applicable law or result in a default under or breach of any agreement or instrument binding upon the Company and so as to comply with any requirement or restriction imposed by any court or governmental body having jurisdiction over the Company, and the Preferred Stock represented by the Depositary Shares has been duly delivered to the Depositary under the Deposit Agreement and the Company has received full payment therefor in accordance with the authorization of the Board, or a duly authorized committee thereof, the Depositary Shares will be validly issued.

Board of Directors

Agree Realty Corporation

September 25, 2012

Page 5

5. With respect to the Warrants, (a) when the terms of the particular class or series of Warrants and of the issuance and sale of such Warrants have been duly established in conformity with the Charter and the Bylaws, (b) when such Warrants have been duly issued and sold as contemplated by the Registration Statement (as declared effective by the Commission), the prospectus contained therein and any applicable prospectus supplement, (c) when the applicable Warrant Agreement (including a form of certificate representing the Warrants) has been duly executed and delivered and (d) when the certificates representing such Warrants have been duly executed and delivered in accordance with the applicable Warrant Agreement, and if all the foregoing actions are taken pursuant to the authority granted by the Board, and so as not to violate any applicable law or result in a default under or breach of any agreement or instrument binding on the Company and so as to comply with any requirement or restriction imposed by any court or governmental body having jurisdiction over the Company, and the Company has received full payment therefor in accordance with the authorization of the Board, or a duly authorized committee thereof, then such Warrants will be validly issued and will constitute legal, valid and binding obligations of the Company, enforceable against the Company under New York law in accordance with the terms of such Warrants and the terms of the applicable Warrant Agreement, except as the enforceability thereof may be limited or otherwise affected by (i) bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer and other laws affecting the rights of creditors generally and (ii) principles of equity, whether considered at law or equity.

In expressing the opinions above, we have assumed that (i) any Common Stock or Preferred Stock will not be issued in violation of Article NINTH of the Charter, as amended or supplemented as of the date hereof, and (ii) the applicable Warrant Agreements will have been duly executed and delivered and governed by and construed in accordance with the laws of the State of New York.

Board of Directors

Agree Realty Corporation

September 25, 2012

Page 6

The opinion with respect to incorporation, existence and good standing of the Company in the State of Maryland is based solely on the Good Standing Certificate.

The foregoing opinions are limited to the Maryland General Corporation Law and the laws of the State of New York, and we do not express any opinion herein concerning any other law. We express no opinion as to the applicability or effect of any federal or state laws regarding fraudulent transfers or fraudulent conveyances. To the extent that any matter as to which our opinion is expressed herein would be governed by any provisions other than those set forth in the Maryland General Corporation Law or the laws of the State of New York, we do not express any opinion on such matter.

This opinion is being furnished to you for submission to the Commission as an exhibit to the Registration Statement in accordance with the requirements of Item 16 of Form S-3 and Item 601(b)(5)(i) of Regulation S-K promulgated under the Securities Act. We hereby consent to the filing of this opinion as Exhibit 5.1 to the Registration Statement with the Commission on the date hereof and to the use of the name of our firm in the section entitled “Legal Matters” in the Registration Statement. In giving this consent, we do not admit that we are within the category of persons whose consent is required by Section 7 of the Securities Act or the rules and regulations promulgated thereunder by the Commission.

This opinion is limited to the matters stated in this letter, and no opinion may be implied or inferred beyond the matters expressly stated in this letter. This opinion is given as of the date hereof, and we assume no obligation to advise you after the date hereof of facts or circumstances that come to our attention or changes in the law, including judicial or administrative interpretations thereof, that occur which could affect the opinions contained herein.

Very truly yours,

/s/ Hunton & Williams LLP