A waterfront 10,009-square-foot Colonial house in Rye, New York, has returned to the market for $8.45 million, after the owner had made it a short-term rental while adding a private dock with deeded access to a peninsula over the summer.

The 1.65-acre property first came to the market for $8.95 million in June 2019. The price was reduced to $8.35 million this March, when it was relisted. It was taken off the market in June, listing records show.

During the past three months, it was rented out as a summer vacation home while the owner updated the property with the new dock, new roof to the house, and some work to the kitchen, according to listing agents Joanne Redding and Lisa Murphy of Houlihan Lawrence, who put the property back on the sales market on Sept. 18.

“It was very difficult to get permits to build the dock,” Ms. Redding said. “And it is a gorgeous place to be, anytime of the year, anytime of the day.”

The covered, mahogany porch, which runs the length of the house, is Ms. Murphy’s favorite part of the property. “You can enjoy the Long Island Sound view and breeze under any weather circumstances,” she said.

The house with six bedrooms and six-and-a-half bathrooms was designed by local architect Shope Reno Wharton in 1994. The current owner bought the property in 2008 for $6.6 million, the agents said, while declining to identify the seller.

The owner added a pool with a spa, and a guest wing attached to the main house, which includes a three-car garage, a basement, guest quarters, an office, and other flexible spaces, the listing agents said.

The home, which shares a gated entrance with two neighbors, “is very private but close to downtown restaurants, shops and train stations, easy to commute to Manhattan,” Ms. Murphy said.