Chicago Fire Executive Producer Reveals Everything About Where the Show Is Filmed

Firehouse 51 is inspired by the real-life Chicago Fire Department Engine 18.

Many Firehouse 51 scenes are filmed at Cinespace Film Studios — the studio that houses all three One Chicago series — but many interior and exterior Firehouse 51 scenes are filmed on-site at the local firehouse. Chicago Fire's production is very grateful for the engine's hospitality and support. 

"Engine 18 is our second home!" Diamantopoulos said. "We find ourselves filming there at least three days a month. The members of that house treat us well and we feel that they are part of the Chicago Fire family. It’s no easy task for them to make room for us and still meet the needs of the community they serve."

Molly's Pub, the beloved One Chicago watering hole, was initially filmed on-site at a bar called Lottie's in the Bucktown neighborhood during the series' early run.

"They were chosen, way back when, for their quintessential Chicago look, inside and out," Diamantopoulos said. "Bucktown is one of our favorite Chicago neighborhoods."

After Chicago Fire's success, Lottie's became a One Chicago tourist spot, leading production to recreate a Molly's on a stage at Cinespace to avoid disrupting the business. But, some moments outside of the bar still demand authenticity.

"While we have a stage set based on Lottie’s at our studio, we still film exteriors at the real Lottie’s from time to time," Diamantopoulos revealed. "As a matter of fact, we were there to film the last scene of Casey and Brett’s send-off." (That was in Season 12, Episode 6 ("Port in the Storm")).

Firehouse 51 saves civilians from all over, and Chicago is a big city: There are over 100 distinct neighborhoods that make up the Midwestern metropolis, and Chicago Fire has excelled at capturing the unique culture and verve of each location represented. 

"We take the story and characters into account when we first receive a script," Diamantopoulos explained. "Are the people we’re rescuing affluent or poor or somewhere in between? What is the rescue, a fire, a person trapped?"

"If it’s a blue-collar or middle-class family in the story, we might film in Pilsen or Bridgeport, which are near Cinespace Film Studios where our production is based," Diamantopoulos said. "A storyline about more affluent characters might lead us farther from the studio to Lincoln Park or The Gold Coast." 

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"Once we know our characters and the general architecture we need, we begin to consider logistics," Diamantopoulos continued. "Is the neighborhood amenable to street closures? Are we moving to another location on the same day?"

Diamantopoulos then shone a light on what a typical day filming for Chicago Fire looks like.

"Today, for example, we are filming on the north side of Chicago in the Lincoln Square area and we have three locations to film," Diamantopoulos shared during the interview. "On a day like this, we try to find all our locations near each other, so that we’re not losing filming time on travel from one location to another. We generally shoot 12 hours a day and try to use the time as practically as possible."

Millennium Park, The Bean, Navy Pier, and several other iconic Windy City landmarks have all made cameos on Chicago Fire. When asked if the crew had any favorite go-to spots, Diamantopoulos gave Chicago's lakeshore a shout-out.

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"There are so many places we love to film and, even after 12 seasons, we find new ones all the time. I think one of our favorites would be North Avenue Beach, especially on a beautiful summer day," Diamantopoulos said.

"Although, we have shot there in winter conditions as well!" she added. "Its view of the Chicago skyline is spectacular."