The accused were arrested from north Delhi's Pitampura area, police said.
Rajesh Aggarwal and Manish Tuli, partners of Gurgaon-based private firm Micromax Informatics, have also been arrested for offering the bribe.
The bribe was for granting regularisation in an improper manner to a banquet hall at Wazirpur Industrial area in north Delhi.
"At least 15 places were raided. During the search at the house of a junior engineer of municipal corporation, Rs.40 lakh was recovered. During the search at the residence of one of the arrested accused, Rs.30 lakh and jewellery was recovered," said the official.
Two of the arrested employees of the municipal corporation were working 'beldars'. The DDA official was identified as Rajesh Gupta.
"It was alleged that the employees of municipal corporation were taking the bribe on behalf of a superintendent engineer, executive engineer, assistant engineer and junior engineer, all of the municipal corporation," said the official.