The area in the Mission District where a woman was shot in the head while sitting on a stoop is gentrifying with multimillion dollar homes, yet burdened by frequent drug use, growing homelessness and crime, said residents who live in and around the building where gunshots rang out Tuesday morning.

The 33-year-old victim, who was not identified and has life-threatening injuries, was shot around 11:45 a.m. Tuesday while on the stone stoop of a two-story brown home with orange doors on 23rd and Hampshire streets, said police and neighbors. No suspect was identified or arrested in the shooting.

Officials said the woman does not live at the home and does not have a connection to its residents. Neighbors didn’t know the woman’s name, but said she typically frequents the stone stoop during odd hours of the late night and early morning.

Investigators were working to determine a motive and circumstances of the shooting. Police did not know if the woman was targeted.

Chad Hajjar, 39, who lives next door to the home where the woman was shot, came home Tuesday afternoon to detectives pulling caution tape from the scene and scanning between nearby cars for evidence after paramedics took the woman to the hospital.

“All I know is that the lady hangs out here on the stoop, typically at odd hours,” Hajjar said.

After the shooting, a passerby called 911, saying the woman was “hit with an unknown object,” police said. Paramedics later discovered the woman was shot.

She was being treated just a block away from where she was shot — at San Francisco General Hospital.

“Being part of the Mission community, you always hear about some kind of gunshots,” Hajjar said. “This neighborhood has always had a certain notoriety because of the (economic) disparities between residents and some individuals who pass through en route to recycling centers or the nearby methadone clinic.”

He had been planning on installing security cameras on his building leading up to the shooting.

Leslie Golkin, 45, was walking her dog Bernardo with her 13-year-old daughter when she learned of the shooting Wednesday afternoon.

Though she said she was concerned about the shooting, she wasn’t surprised.

When her family first moved to Hampshire Street in 2014, there were four shootings in the first four weeks of her family settling into their new home, she said.

Golkin said she doesn’t let her 13 and 14-year-old daughters walk in the neighborhood alone after noon because of criminal activity, such as the shooting.

“It’s a stressful place to live,” Golkin said.

Evan Sernoffsky and Lauren Hernandez are San Francisco Chronicle staff writers. Email: esernoffsky@sfchronicle.com; lauren.hernandez@sfchronicle.com Twitter: @EvanSernoffsky @LaurenPorFavor