Real Estate

Nat’s all

We’ve found Natalie Portman’s NYC digs. The “Star Wars” and “Garden State” hottie is staying at a Union Square rental building with her dog, Whiz.

Portman is getting stares from fellow residents/fans and protection from chivalrous doormen at the Fourth Avenue building.

Portman’s spokesperson tells us she is renting an apartment for her cousin, but our spies have seen the actress alone. (What, no boyfriend?) Her father has also been spotted visiting her.

We hear Portman has settled into one of the larger units, in a building where two-bedrooms start at about $5,000. She also has a home in Los Angeles and is currently filming “Thor” in New Mexico.

Looking for a match

Patti Stanger of Bravo’s “Millionaire Matchmaker” could be taking her show on the road and planning to move to the Hamptons for the summer, cupid skills in tow.

A Bravo spokesperson says it is too early to speculate about future East End episodes, but we hear that Stanger has been calling Hamptons brokers looking for a fancy beach manse to live and shoot in.

In fact, some brokers are rolling their eyes about how Stanger hopes to find an owner willing to give her a rental for little or nothing.

Isle be there

Investor Chris Knight has listed his Shelter Island bayfront beach cottage for $3.5 million. The four-bedroom, three-bathroom home (not far from hotelier Andre Balazs’ Shelter Island house) is about 2,000 square feet on 0.77 acres and is fully renovated. It comes with a fireplace, cathedral ceilings, a chef’s kitchen and dramatic water views. There is room to build a pool and dock.

Corcoran Group broker Penelope Moore has the listing.

In 2008, Knight sold Shorewood Manor, a Shelter Island waterfront estate once owned by former governor Hugh Carey and his family, for about $12 million. Knight had originally listed the estate for $33 million.

Mega-manse, $35M

A potentially stunning private mansion — the combination of two buildings — is on the market for the reduced price of $35 million. The structure at 133-137 E. 73rd St., with another entrance at 1024 Lexington Ave., is now completely gutted except for retail space that houses small stores.

The property is unique because while most of its frontage is on Lexington Avenue, it has a townhouse feel with its primary entrance on East 73rd Street. The current owner, BLDG Management, has obtained permission to transform the 27,500-square-foot, five-story elevator building into a private residence. And there is approval to build out an additional 2,500-square-foot duplex atop the building. Broker Ivan Hakimian of Itzhaki Properties declined to comment.

While the building has been used for medical offices for about 30 years, BLDG Management discovered that it had once been residential. The owner noticed residential wiring throughout the building, and fireplaces on each floor that could be restored. The property was listed for $40 million about a year ago.