This case is submitted on the plaintiffs’ motion to affirm. Defendant appeals from the issuance of a writ of mandamus in Oakland County-Circuit Court compelling him to grant plaintiffs a building permit upon submission of a completed application. Plaintiffs, owners of an irregularly-shaped parcel of land on which a commercial building is situated, desired to construct an addition to their building and obtained the necessary variances from the city’s Zoning Board of Appeals. Defendant nevertheless refused to grant a building permit because the Planning Commission, subsequent to the action of the Zoning Board of Appeals, overruled the board. Plaintiffs petitioned in circuit court for a writ of mandamus which was granted upon the trial court’s finding that the Planning Commission had no right to interfere with the determination of the Zoning Board of Appeals.

With this conclusion, we cannot disagree. Shulhan v. Hamtramck City Council (1966), 5 Mich App 399. Although the board’s decision may have been open to attack, the Planning Commission’s withholding of a building permit was not the proper vehicle to challenge it; a Zoning Board of Appeals’ determination can be set aside only in the courts.

Plaintiffs have also submitted a request for punitive damages pursuant to GOB. 1963, 816.5. While the questions defendant has presented on appeal are *248unsubstantial and do not require formal submission to or oral argument before the Court, the appeal is not frivolous. Mullally v. Trenton Board of Education (1968), 13 Mich App 464, 469; In re Greening Estate (1967), 9 Mich App 22, 25.

Motion to affirm the judgment below is granted; motion to assess punitive damages is denied.