The variety of construction and finishing materials is enormous. It needs deep understanding of their properties and quality in order to select the ones that fit your taste and your budget.
Imagine a house with stone, concrete and steel in a remote location. The cost/time of shipping and handling will be very high. Furthermore, it might be difficult to find specialized workers.
In general, false materials selection can cause cost increase up to 50%.
On the other hand if you add some fine architectural details made from special materials, the additional cost will be low and the value of the house (either commercial or rental) will substantially increase.
Find the thin line between cost and value with your construction company’s advisors.