Police headquarters building, Chennai

The Police headquarters building is a heritage building in Chennai, Tamil Nadu, India. It is located facing the Marina Beach opposite the Queen Mary's College and the lighthouse on the junction of Dr. Radhakrishnan Salai and Kamaraj Salai. It was built in 1839. It houses the director general (DGP) of the Tamil Nadu Police. The building was renovated in 1993.

History
The building was built in 1839. Known as "Perfect Unanimity", the present building was originally a Free Masons lodge, which was taken on lease by the Police in 1865 for a rent of ₹ 90 per month. In 1874, the Madras Presidency Police bought the building for a sum of ₹ 20,000. The building was expanded and repaired at a cost of ₹ 10,000.

In 1993, the building was renovated.