Johan Christian Conradi (1709 – 30 September 1779) was a German born, Danish master builder, contractor and architect.
In the late 1740s he began routinely working for Niels Eigtved, architect to the Royal Court, executing projects such as the first Royal Danish Theatre at Kongens Nytorv (1748–49, demolished in 1874), Danish Asia Company's warehouse at Asiatisk Plads (1748–50), Christian's Church (1755-64) and the Lindencrone Mansion in Bredgade (1751).
These include two houses at 50–52 Prinsessegade (1750), the Royal Naval Hospice, now known as Søkvæsthuset (1753–55, later altered and expanded), the Wilder Warehouse at Wilders Plads (1762–63)[4] and Royal Greenland's warehouse at Grøndlandske Handels Palds (now North Atlantic House from 1764.
His own house at Christianshavn Canal (29 Overgaden neden Vandet, 1752) and his rectory for Christian's Church have both been demolished.
Among the buildings which are attributed to Conradi are Sæbygård in the west of Zealand (1740s, demolished), Christiansholm at Klampenborg (c. 1748), Kaalund Convent (originally a farm under Kalundborg Castle, 1751–52), 40–42 Amaliegade in Copenhagen (1756–60) and Store Godthåb in Frederiksberg (1770).