The width of the door you choose could directly affect aesthetics, but most often, door widths are selected for practical reasons. The most common interior door width found in a bedroom is 30 inches. However, if your bedroom plans include a reading nook with an over-stuffed sofa or a towering antique wardrobe, you need to make sure the door size can accommodate those pieces. Or maybe you’re creating a spare bedroom that also functions as an office. You might want a larger opening to accommodate a spacious desk or workstation. Most commercial buildings must have doors at least 32 inches wide to maintain access for those in a wheelchair. If you are building your dream house and plan on living in it for the rest of your life or are planning an addition to accommodate elderly parents who may someday need to use a wheelchair, you may want to install 32- or even 36-inch doors.