What setback applies to the street side of a corner lot in Troy?

It depends on the yard relationships on your block (Section 4.06.D.3).

• Where the block has a common rear-yard relationship and the block directly across the separating street has a common side-yard relationship, the street-facing side yard needs to meet only the district's required side yard (the greater of the two).
• Where those relationships do not exist, the street side must equal the full front setback of the district, and that yard counts as a front yard.

The difference is significant. In R-1B, for example, the required side yards are 10 and 15 ft while the front setback is 40 ft (Section 4.06.C).

A front-yard classification also affects fences: only 30 inches of fence height is allowed in front of a front building setback line, though qualifying corner lots may run a 48 inch non-obscuring fence along the common street line (City Code § 83-2(A)). Ask the Planning Department at 248-524-3364 how your lot is classified.