DNCC personnel began clearing out the office, which is being relocated to Mohammadpur
The body was recovered from Joinabari area on Friday night, said Superintendent Abul Bashar of Savar Model Police Station.
Bulbuli, a Sirajganj resident, was found strangled by a rope. An initial investigation found evidence that she was raped before her murder, said Superintendent Bashar.
Her family has been informed of her death, the police official said. A case will be filed over the incident and those involved are being sought, he added.
The body has taken to Dhaka Medical College Hospital morgue for a postmortem examination.