While it is certainly possible to design and decorate the interior of your home alone, having the input of a professional decorator or interior design expert can be incredibly helpful. These professionals can help you narrow down a color scheme, buy furniture that fits your style and craft a cohesive theme that flows effortlessly throughout the home. Of course, most homeowners are concerned with the costs of an interior designer. Let this guide help break down some of the most common services as well as what they cost to help you budget for this professional design assistance.