While few developers are building single-family homes or condos these days, the market for student housing on the UW campus seems immune from the economic downturn. To that end, developer Joe McCormick is pursuing a new five-story, 14-unit apartment project at the corner of North Brooks and West Dayton streets. The project, which was presented to the city Urban Design Commission this week, totals 38 bedrooms in a mix of unit sizes.