The approval to raise up to USD 500 million is valid for six months, HDFC Ltd said in statement.
HDFC would be raising the money under the ECB window for housing finance companies that the Reserve Bank of India (RBI) allowed for funding affordable housing projects.
Last year, it raised USD 300 million through ECB, the first by an housing finance company under the low-cost affordable housing scheme of RBI.
Meanwhile, HDFC today cut home loan rate by 0.2 per cent to 9.9 per cent for new as well as existing borrowers. Besides, it is also revising its deposit rates.
Earlier this week, many banks including State Bank of India, ICICI Bank, HDFC Bank and Axis Bank cut lending rate by up to 0.25 per cent after RBI Governor Raghuram Rajan's tough talk with bankers.