North America is heavily forested to this day and the soil and climate are ideal for relatively fast-growing trees used in most construction.
Clay to make bricks is relatively rare compared to the UK and Europe in general.
The Romans built with granite, marble and other types of stone because their volcanic geography left them with quite a lot of those materials very close by. When they arrived in the British Isles, they found little in the way of appropriate stone readily available, but quite a bit of clay and clay sand from which bricks could easily be made. So they built Londinium and their other major cities mostly out of brick and most of the rest of the British Isles did the same.
Also, brick and stone are horrible materials for seismically active areas, which includes most of the populated sections of Western North America as well as some other regions here. Wood is good because it will flex in an earthquake rather than collapse. That's part of the reason traditional Japanese construction used wood.
Material availability and suitability for local conditions tends to determine what materials are used. We've got lots of huge forests, easily grown softwoods and seismic conditions that favor flexibility over absolute strength. So wood is appropriate.
