On Saturday (April 13), Patkar announced on micro-blogging site Twitter that she had called off her fast after getting assurance from Maharashtra Chief Minister Prithviraj Chavan.
"Ended d fast after a meaningful resolution of issues following meetings with Secretary Housing & CM. Thanks everyone for support. Zindabaad!" Patkar tweeted on Saturday morning.
Chavan said an inquiry would be conducted into the demolition of a slum in Mumbai.
She ended her fast after midnight last night, an associate of the veteran activist said.
Patkar was fasting since April 4 after 43 houses of the Ganesh Krupa Housing Society in Mumbai's Golibar slum area were razed by civic authorities.
The NHRC has issued a notice to the Maharashtra Chief Secretary and the Director General of Police to reply within two weeks on the demolition.
Earlier, fellow-activist-turned-politician Arvind Kejriwal was on a fast to protest against inflated power and water bills in the national capital. Aam Aadmi Party (AAP) leader broke his fast after 15 days.