@Mr. Sriram
You have reappeared after a long gap. In an earlier response you had mentioned that the Supreme Court judgments were dated after you acquired the parking space. Were you able to get the judgments? I am not able to get them. If you could get those judgments what were reasons given for the judgment that parking lots could not be sold?
A judgment may be applicable to the particular case before the court. Whether they will be applicable for similar cases or whether the cases are similar can be ascertained only if one reads the judgment.
A properly executed and registered deed between two parties is not sufficient to confirm the ownership of the buyer. Even before executing a deed the buyer should ascertain the title of the seller to the property, whether he has the necessary sanctions and approvals from competent authorities, what is the user for which approvals were given etc.
It was said that once upon a time a person sold the Eiffel Tower in Paris. The sale deed was perfect in all respects. It was also registered. The problem was that it did not occur to the buyer that he should ascertain and confirm the ownership of the Tower by the seller. No one has sold the Gateway of India yet, to the best of my knowledge.
As regards your flat, the builder would have submitted plans to the Municipality and other concerned agencies and got approvals. You can see your flat in the approved plan and the user also would have been stated as "residence".
Have you seen a similar plan of the stilted area where your parking lot is situated? Has your car parking slot been clearly marked in the drawing and also stated as "Car Parking". Generally in a transfer deed the property being transferred would have been described giving such details as its dimensions, boundaries etc.
Is property tax being levied on your parking space? If so does your Society give you a separate bill for the Property tax in addition to the parking fees? How much is the property tax? Is your parking slot and the parking slots of others identifiable by any distinctive mark or numbers? Municipality will generally give a tax calculation table to the Society. You ask the Society to give you a copy of the tax calculation table. If the Society doesn't give, you can get it direct from the Municipality through RTI. Find out whether your parking lot and other parking lots have been mentioned in their table.
You say you purchased the parking lot at Rs.700/- per sq.ft. What about the other parking slots? Were they purchased by other members? Were there unsold parking lots? Who purchased them? Were they transferred to the Society? Did the Society pay for parking lots transferred to them, if so, how much? Does the conveyance deed specifically mention the parking slots?
I suspect that the builder has taken you for a ride.