The article presents the results of studying urban estates of provincial merchants based on a field survey of the preserved buildings of Yelabuga and analysis of various sources. The estate form of development determined the type of urban space of Yelabuga from the beginning of the 19th century and to the 1917 revolutionary upheavals. According to their purpose, merchant estates can be divided into residential and commercial-industrial, which was in many ways typical of the trading cities of the Central Russian zone. The structure of a merchant estate included a residential building, courtyard with outbuildings (stables, sheds, a glacier and a barn), bathhouse, one or two outbuildings, and garden plot. Geographically, the estates occupied plots measuring 17–20 acres, located on the sides of longitudinal streets and extended into the depths of the block. After the 1850 great city fire, each estate was fenced on two (and in some cases three) sides with firewall walls. The front of the house with a gate overlooked the red line of the street. The composition of the manor house was determined by the norms of regular urban planning, location, functional use of the territories, size and configuration of the land plot, as well as a local landscape. In the second half of the 19th — early 20th centuries, when Yelabuga turned into a large commercial center, a new type of merchant estate, combining residential and trading functions, became widespread. On the estate territory, in addition to residential and commercial buildings, there were shops and stores, warehouses and storehouses. At the same time, the merchants began to pay considerable attention to the functional side of buildings, their convenience, comfort, lighting, and ventilation.