February 9,1961 plaintiff duly applied,, to the defendant city, for a permit authorizing construction of a “drive-in” restaurant on its recently purchased parcel of Detroit property. The parcel was then zoned B2, permitting such construction and' use. Some 3 weeks later the city notified plaintiff that the latter’s plans, submitted with the application, required certain corrections. The corrections were made. A week or so later the city’s building-department advised plaintiff that no permit would be issued; that a petition to rezone such parcel had just been filed per ordinance authorizing such a petition.
The common council of the defendant city promptly resolved that a public hearing, upon the petition to rezone, be conducted April 7th next at 10 o’clock in the morning. March 31st plaintiff filed in circuit the instant petition for mandamus to compel issuance of the permit it had applied for. Hearing on order to-show cause was set for April 7th, at 2 in the afternoon. April 7th, at 10 in the morning, the resolved public hearing was held. It concluded, allegedly, with announcement that a decision would be made at the regular meeting of the council to be held April 11th. However, after plaintiff and its counsel left the hearing, the council again took up the matter and voted to amend — with immediate effect — the then-ordinance so as to prohibit plaintiff’s intended use of such parcel. That afternoon the circuit judge, being advised of the council’s action, adjourned hearing of the order to show cause. Thereafter defendants amended their answer to plaintiff’s said petition so* as to include the amendatory ordinance as a defense, to which amended answer plaintiff filed an amended reply.
• The pleaded issues came to testimonial trial October 31, 1961, and resulted in judgment denying and dismissing plaintiff’s said petition. It reviews on granted leave.
*279
This case is a substantial duplicate of
Willingham v. City of Dearborn,
The circuit court might well — of discretion and upon authority of
Willingham
— have done here what the same court did in
Willingham.
It did not do so, however, and so the presented questions are controlled by
City of Lansing
v.
Dawley,
Mandamus proceedings, even though filed and considered on the law side, are governed by equitable principles. The writ is one of grace, and does not issue to compel performance of what is shown on due pleading and proof to no longer be a clear legal duty. In this case the circuit court was duly faced with a “law,” brand new yet valid for its purpose, which "between the filing of plaintiff’s petition and hearing thereof came to enactment prohibitory of that which •plaintiff sought to compel. Since the grant or denial ■of a petition for mandamus is, as in equity (see
*280
Carlson
v.
Williams,
Plaintiff’s remaining allegations of error have been duly considered. They are, respectively, that the amendatory ordinance was not validly enacted; that the action of the city “in preventing the issuance of a building permit * * * until the zoning ordinance could be changed” was invalid; that the amendatory ordinance by its terms is not “retroactive,” and that the ordinance as amended should be construed so as to exclude from its prohibitory purview any good faith previously intended use. We cannot agree with plaintiff’s contentions thus advanced. It follows that the circuit court’s judgment should be, and therefore is, affirmed. No costs.
