"It has been very frustrating. It's been a little bit of let down for us and for the people (living in the colonies)," Dikshit said when asked about the slow progress of infrastructure development in unauthorised colonies.
Delhi government had issued provisional regularisation certificates (PRCs) to over 1,200 unauthorised colonies ahead of assembly polls in 2008, which are home to around 40 lakh people and constitute an important votebank.
The then Sheila Dikshit government, while distributing the certificates, had promised to regularise the colonies if Congress came to power for the third term. However, not a single colony has been regularised so far.
The process slowed down considerably last year following allegations that some "non existent" as well as "ineligible" colonies were given provisional regularisation certificates flouting norms.
After Congress' electoral drubbing in civic polls, a number of party MLAs have said the party its support base in unauthorised colonies as the government failed to carry out developmental work there.
Dikshit said government was trying hard to build infrastructure in the unauthorised colonies which were given clearence by various concerned agencies.