The county is experiencing an increase in activity levels in the Building Department, according to the weekly memo released by County Executive Officer Rick Haffey. Since Jan. 1, the department has received applications for 10 new single-family houses. In addition to the houses, the department received applications for five model homes to be constructed in the Cascade Crossing (previously known as the Saddle Ridge) subdivision in South County, the memo stated. “We are also seeing a marked increase in the number of people seeking service at the Community Development Agency counter,” the memo states. “We are on a pace to …