Normally the builder will run the society including security, maintenance etc., for a period of 6 months and register a society / association and will handed over to your members. In case, if he is not willing to form a society and hand over to you, then you can form the society / association and register with Registrar and will allocate you a number.
Initially you will have to call for a meeting of all owners. At least 2/3 members should be available. From this you will have to elect a President, vice president, Treasurer, secretary, joint secretary and executive member. Minimum 7 persons should be elected initially. Then your agenda and meeting should be endorsed in a register and all members have to sign with their name as given in the records.
point No. 2 - Collect sample bye-laws (2/3) from the legal office or from other society / association and see what are the terms and points required by your members.
Select those points and prepare your own bye law with your society / association name, address, office address and other details of selected members as required by you with a list of all members with their Flat No / Villa No / House No.
Then go to a legal agent office who are working with Registrar office and you tell them your requirement and they will prepare an affidavit on a stamp paper ( in kerala it is on Rs 500/-) and will notarize and give to you. Then you approach to registrar office with this affidavit and copy of your bye law. (The bye law should be signed by President, Treasurer and Secretary in each page). Then they will tell you the next procedures and other details. Once you have formed the society and Registration is obtained, then builder can not play with you. more