建材市场

Chinese 建材市场 are massive one-stop wholesale complexes where homeowners and contractors buy tiles, flooring, sinks, doors, light fixtures, and paint, effectively the raw materials of 装修 (home renovation). The 东方家园 / 红星美凯龙 / 居然之家 chains are the best-known national brands, while most cities also have legacy open-warehouse markets from the 1990s and 2000s boom.

建材 (building materials) as a prefix appears in many compounds: 建材店 (store), 建材行业 (industry), 建材展 (trade show). The full 市场 here implies a bazaar-style complex, not a modern retail showroom.