Last year in ZIP code 21701, the average listing price was $293,623, a 1.2 percent increase from the year prior. Year-over-year, inventory marginally declined 1.5 percent, from 200 listings to 197 homes on the market. ZIP code 21701 features a number of penthouses which offer tons of space, amazing views, and the conveniences of high-rise living. You can have a comfy evening snuggled up next to a burning log fire in many of the houses around this vicinity. A lot of the people in this place like to exercise in the nearby fitness centers, paving the path for physically fit and happy residents.