Celebrity developer Joe Farrell has re-listed his five-bedroom Park Avenue pied-à-terre for $5.99 million following a broker swap. 

With clients such as Madonna, Justin Bieber, and Jay-Z and Beyoncé — who once famously rented his “Sandcastle” dream house in the Hamptons — Farrell knows a thing or two about high-end luxury. 

The 3,000-square-foot, gut-renovated apartment, at tony 510 Park Ave., comes with custom finishes like floor-to-ceiling steel doors with laminated glass.

It’s on the market, Farrell says, because he “rarely” spends time in the city — spending most of his time in the Hamptons and Florida where his company, Farrell Building Co., also has offices.

The unit features five bedrooms and a semi-private elevator landing. It’s anchored by a 48-foot-long sunlit corner living and dining room with eight oversize windows, and is well proportioned for entertaining. 

There’s also a chef’s kitchen and a main corner bedroom suite that includes a walk-in closet and a spa-like bath with radiant-heat floors.

Two other bedrooms come with ensuite baths, while a fourth bedroom is decked out with built-in Murphy bunk beds. A fifth bedroom is currently set up as a home office. 

The unit additionally features details that include new windows, 8-inch white oak floors and custom millwork. The listing broker is Kelly Killoren Bensimon of Douglas Elliman. 

Farrell bought the residence for $3.56 million in 2013.

The 15-story boutique co-op with a two-story limestone base was developed by Starrett Brokers and designed by F.H. Dewey & Co.

Built in 1925 and converted to co-ops in 1946, the building sits between 60th and 61st streets. Amenities include a gym and a bike room.