The spring market is in full swing and if this home sale is any indication, it’s as competitive as ever. It’s a four-bedroom split level with two bathrooms, built in 1960, and sits on a .23 acre lot in Closter. There was an hour-long line to get through the front door at the open house, said Jennifer Yang-Wu, the listing agent with Coldwell Banker Realty. And 18 offers. The home was listed Feb. 1 for $945,000, what Yang-Wu and the sellers thought was a fair list price. It closed March 29 for $1.2 million. That’s $255,000 above the asking price. “This spring market is even more competitive for …