B L Kashyap and Sons Ltd is a construction and infrastructure development company with a pan India presence. Their service portfolio extends across the construction of factories and manufacturing facilities, IT campuses, commercial and residential complexes, malls and hotels. The company's operations extend over North, South and Western India and are coordinated through the corporated office at New Delhi and regional offices at Bangalore and Pune.

The company major projects includes The Grand Great Eastern Hotel in Kolkata, Biocon Research & Manufacturing Facility in Bangalore, Britannia Biscuit Plant in Uttarakhand, Carraro India Factory and Office Complex in Pune, Escorts Heart & Research Institute in Faridabad, Jaipur Golden Hospital in New Delhi and Specialty Cardiac Center for Fortis Healthcare in Mohali.

B L Kashyap and Sons Ltd was formally created and deployed as a legal entity on May 8, 1989 as B L Kashyap and Sons Pvt Ltd and subsequently converted into a public limited company on June 7, 1995. Then the name was changed to B L Kashyap and Sons Ltd.

In April 2005, the company executed a strategic acquisition of 11000 equity shares of BLK Furnishers & Contractors pvt Ltd, thereby making the company as a wholly owned subsidiary company. In November 2005, the company formed a wholly owned subsidiary company with the Soul space Projects Ltd to strategic emphasis mainly on the residential sector. In May 2006, the company bagged new projects worth over Rs 3700 million for nearly 5.17 Million sq ft all over India.

The company was among the top five construction companies in India for the year 2006 which was listed by Construction World in January 2007. Also, the company was ranked 249 on the Bangalore Times 500 list of India's most valuable companies.

In May 2007, the company bagged fresh construction orders for Rs 1007 crore. In February 2008, they bagged a new project worth over Rs 1100 crore and in March 2008, a new projects worth Rs 344 crore, for construction of 3.60 million sq ft of space.