When Seattle Opera opened its 105,000-square-foot, state-of-the-art opera center late last year, its leadership hoped to find an ideal nonprofit tenant to share it with.

Now, a longtime partner is gearing up to take that space, where both organizations will make beautiful music together.

“We do so many thing together any way, it will be that much easier when we just have to go up the stairs,” said KING FM CEO Brenda Barnes.

The commercial-free nonprofit radio station has until the end of February to move out of its current space at 10 Harrison St., which will be leveled and replaced with a seven-story, 110-unit apartment building with ground-floor retail. The late Leo Kreielsheimer gifted the property to the Corporate Council for the Arts in 1999.

“The very first space that we looked at was this,” Barnes said of the 4,000-square-foot office space Seattle Opera had put up for lease. “At that time, the opera center was still under construction.”

The space was deemed to small to accommodate the classical radio station’s needs during the first walkthrough.

“It was in the nick of time, actually, that we spoke,” said Aidan Lang, outgoing Seattle Opera general director.

Seattle Opera had additional space to share, he said, and was committed to finding a nonprofit that would be comfortable living with a performance art organization, Lang said. Adding those shared spaces gave KING FM the room it needed. The radio station has long broadcasted McCaw Hall performances and other collaborations with Seattle Opera, and soon it will be even easier to arrange an interview with an artist of interest or tease an upcoming performance.

“You can do it at lunch time,” Lang said, referring to the shared kitchen.

Barnes said KING FM expects to move into its new space on the second floor of the Seattle Opera Center near the end of February.

“We’re not going to move very much, because a lot of KING’s equipment is very old,” she said.

The buildout includes constructing five soundproof studios, with new equipment and furniture. Once construction is complete, it will take about two months to install the equipment and wiring. It’s a complex process, Barnes said, with a high price tag. KING FM has so far raised $2.3 million of its $3 million goal. Those wanting to chip in can visit king.org/campaign5.

“Typically, we will have to flip the switch from one station to the next,” Barnes said, which will likely occur after midnight on a weekend, to keep any broadcasting disruptions to a minimum.

Lang plans on checking in the next time he’s in Seattle. He recently left Seattle Opera to join the Welsh National Opera in the United Kingdom as its general director.

“I kind of started there,” he said, adding that opera company is starting work on its production of “Carmen,” which Seattle Opera just wrapped up. “Obviously, next season was done and dusted.”

Not only will KING FM be an even closer partner to Seattle Opera, the nonprofit classical radio station’s lease will provide the center with a reliable income stream.

“It makes it such a joy to write that rent check every month,” Barnes said. “We have so many opera fans on the staff at KING FM, more so than any other radio station where I’ve worked.”