"We are attracting a different customer, a different demographic," Spencer said. "With our customer base, we have found that a better strategy is to work with each individual buyer."
At the current sales pace, it will take 5.6 years to move all the new condos off the market, the Delta Associates' report said.
And it seems clear that the existence of so many unsold condominiums is affecting the rental market, as well.
In a separate mid-year report on apartments, Delta Associates said the vacancy rate in Center City is up to 7.6 percent, from 5.4 percent last year, with average effective rents at $1,787, or $1.76 per square foot.