For many years, the twin towers of the Eldorado on Central Park West have been a quiet refuge for Bono and Adam.

Bono, sold his co-op there in 2008 after buying a bigger apartment farther down the street. Now Adam Clayton, has put his own three-bedroom co-op at the Eldorado on the market for $8.695 million.

The listing, by Emma and Michael Kerins of Halstead Property, shows a large co-op on the fourth floor with a 38-foot-long gallery, a formal dining room and seven large windows facing Central Park.

That large space was re-created by Mr. Clayton. During weaker times when the apartment was a rental, it had been chopped up into two separate units.

Mr. Clayton bought them in two transactions in the early 1990s and recombined them, according to Linda Reiner, a broker at Warburg Realty, who has lived at the Eldorado for three decades.

One apartment was purchased for $620,000 in 1993 and the other went for $430,000 the following January, according to transaction records compiled by Jonathan Miller an appraiser and president of Miller Samuel Inc.

The co-op was listed without fanfare earlier this month by Ms. Kerins, who declined to discuss it. A representative of U2 referred a caller to Ms. Kerins.

When Mr. Clayton renovated, he modified the apartment's original layout. He eliminated one small bedroom in what had been a four-bedroom apartment to create a master-bedroom suite, with a large bathroom and a 9-by-10-foot dressing room.

Two maids' rooms were replaced with a 22-foot-long eat-in kitchen with a butler's pantry.

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