BYGG ET NYTT CARPORT PÅ ASKER

Hi, i live in a apartment at måsankroken, 1385, Asker. We 4 owners like to build a carport or 4 or 2 garage. Please find more details in the picture attached. Could you please come up with a estimate? You are welcome to survey our place (but we cannot pay for survey), we are in progress of getting bids various parties would appreciate if you could give a better deal. 4 House owners has to decide and proceed further so kindly give a better deals. Would be good if you could share your previous works reference building garage