You should make use of reviews. It has been recommended that when you actually look for the top architects in Singapore. Using the reviews would put you in a position to understand the different kinds of services that you would be receiving from a potential company.
All you need to do would be to read the feedback that has been left by previous clients pertaining to the services they actually have received from the firm. In case, the customers were completely satisfied, you could think about moving forward with that specific company. You could make the potential architectural company your official home builders.