You can decorate both a house and an apartment in the American style. The main thing is that the room is spacious. You can choose inexpensive materials for finishing, but not at the expense of quality.
Parquet or laminate in light shades are best suited for the floor. You can use ceramic tiles in light shades with alternating beige and brown tones.
Walls in the American design style are covered with single-color panels. The “wood” option is possible, especially if it is a country sub-style. Plaster or single-color paint will also be appropriate. Wallpaper is used less often, usually it is a floral theme on a textile or paper base.
Ceilings must be prepared for whitewashing or painting. Geometric stucco with moldings around the perimeter will also fit well into this style.