After you show the contractor around, specify the quality of material you want used so he can give you an estimate accordingly. Get him to put it all down on paper (including breakups for specific jobs and timeless), and ensure there are no hidden costs. Once you have done this routine with three contractors, you would have an idea about who you can work with. A good tip on how professional the contractor will be is to see how he responds to your call. Does he say he will come at a certain time and not show up? Many contractors work on up to three sites simultaneously, so it’s better to find out how busy they are at the outset. Also, once you zero in on one, draw up a contract (experts suggest an “item rate contract with material” where the contractor gives you the rate for all the items listed by the architect and procure the material himself).
If you plan to buy the raw material (cement, bricks) yourself, you will know what cost to expect. But even if you are going to outsource this job, visit hardware stores once so that you have a fair idea of the rates. It also helps you get a feel of what kind of material you want to use. For example, would you rather stick to wood for windows or opt for the more contemporary anodized steel? Also, look into the availability of material at the time you are planning the renovation. Check for alternatives if availability is a problem, so that you need not stall the renovation.
Here’s some know-how to help you make the right choice