Larger furniture often has more components; some of the higher-ticket IKEA items are made up of a multitude of parts, which typically means a higher assembly cost. To simplify pricing, some assemblers charge based on the price you paid for the furniture. For example, Already Assembled of Perry Hall, Maryland, charges 20 percent of the entire purchase price; anything under $375 is a flat $85 (although there may be an additional charge for travel if you live out of the company's service range).