Kekushev's talent and recognition peaked in 1900-1903, when Art Nouveau, for a while, became the dominant style in Moscow. His buildings include such diverse luxury residences as the timber-framed Nosov House (Electrozavodskaya Street) and stone and steel Mindovsky House (44 Povarskaya Street, now Embassy of New Zealand - a part of a large affluent community developed by Jacob Reck). Kekushev, skilled in interior finishes, practiced Gesamtkunstwerk approach, designing interiors down to the smallest details. Unlike other architects, who commissioned artwork finishes to independent artists, all Kekushev buildings have distinct Kekushev metal ornaments.