For that reason, he considers complaints called in to the department to be a more reliable indicator of illegal construction.
They cannot enter private dwellings, though, and often illegal construction goes unnoticed.
"There's no way that we can remove these millions of people, living in illegal constructions, from Delhi," he said.
Most of these illegal constructions belong to the very poor who have migrated to the city from elsewhere.
His lawyer, David Lenetsky, said he had no knowledge of any illegal construction at the site.
The unexcavated portion, however, is threatened by the illegal construction of housing.
Its size has decreased much in recent years and some illegal constructions have been made.
City officials said the cause was illegal construction.
Another unsustainable act is illegal construction of buildings and structures, which are not in line with the government approved development plan.
The summer blazes and illegal construction are ruining perhaps the most beautiful country in Europe.