A lawsuit filed Friday says the Colorado Springs clinic lacked armed security guards and adequate fencing during the November attack. Three people were killed and nine others injured.
Planned Parenthood spokeswoman Whitney Phillips declined comment on the suit. She says the organization believes its facilities are safe and inviting for patients and staff.
Robert Dear has acknowledged opening fire at the clinic, telling investigators he was upset with Planned Parenthood for selling baby parts.
A judge has declared him incompetent and ordered him to undergo psychiatric treatment before his criminal case can proceed.