Addressing a press conference here, Yadav alleged that BJP candidate Rao Inderjit Singh has given the value of his immovable assets as Rs 14.1 crore, whereas its actual worth is over Rs 300 crore as per circle rates.
"The affidavit also incorrectly presents the fact that agricultural land, once converted for development of projects, cannot be termed agricultural any longer.
"There is one 41 acre property in Rampur tehsil in Rewari district and another 2.78 acre of prime land in Gurgaon which Singh has been given to Unitech and Krissh developers but are shown as agricultural land," Yadav claimed.
Yadav claimed that as per the circle rate, the value of 41 acre land is Rs 198 crore and the Gurgaon property is Rs 59.93 crore, but have been shown as Rs 8.27 crore and Rs 1.39 crore respectively.
Yadav also said that Congress candidate Rao Dharampal has not disclosed his entire property details and has stated that being a "deponent or Karta of HUF (Hindu Undivided family) he pays income tax for all their assets.
"He has declared the worth of his immovable properties as Rs 6.5 crore. If you say this to anyone, he will laugh at you. He is known as a big developer in Gurgaon.
"After disclosing his few properties, he through a small column has declared himself as 'karta of HUF', has just said he pays income tax for that," Yadav claimed.
Yadav said AAP will complain to the Election Commission of India about this and urge it take strict action against them.
Yadav said there is a requirement from Election Commission that every candidate discloses his or her assets in affidavit. But a mockery of this mandate is being made by candidates of Gurgaon constituency.
Yadav said AAP will urge the EC to clear its stand on such "covered" declarations for the sake of transparency.
He also alleged that in the present affidavit, the property owned by Singh in Gurgaon has been shown to be acquired in 1994, but it did not find any mention in his affidavits filed in 2004 and 2009.
In case of Dharampal, Yadav said his balance sheet shows that there are substantial land holdings in the form of a real estate company, valued over Rs 50 crore.
However, details of the lands are not exactly mentioned in the balance sheet, so the circle rates cannot be estimated, he added.
"In their affidavits, candidates of both major parties, BJP and Congress, have either not shown the properties or undervalued them even if they have shown.
"The nexus between politician and builders is evident as lands being developed by builders are shown as owned by politicians. The conversion of land, prevention of acquisition by government and undervaluing of wealth -- they all require a political umbrella," Yadav said.