Comercial Mariano Juan

A family-owned building supply company

Comercial Mariano Juan is a family-owned company based in the Son Castelló Industrial Park in Palma de Mallorca, Balearic Islands. It has worked in building materials and plumbing supplies for more than 60 years and has become a key supplier in the Balearic Islands for installers and individual customers. The company is currently led by the three Juan Costa brothers.

History

Mariano Juan Servera founded the company after deciding at age 25 to invest in a supply business that would bear his name. It was the first company to sell Porexpan (expanded polystyrene) in the Balearic Islands and one of the first in Spain to adopt the Barbi brand’s plastic piping system. The original store was in Palma before growth led the company to move to its current warehouse in the Son Castelló Industrial Park.

Products and services

The company sells building and plumbing supplies, with a particular focus on plastic piping and Porexpan. Services include retail sales, sales through delivery routes, and technical support. It also provides pricing information and works with a range of brands.

Departments and contact

The company has several departments and contact channels:

• General inquiries: 971 755 608, cmjuan@marianojuan.com
• WhatsApp orders: 616 439 635
• Purchasing director: Mariano Juan Costa, machi@marianojuan.com
• Purchasing sales: Antonio Munar, vendor@marianojuan.com
• Administration and collections: Pere Juan Costa, pere@marianojuan.com
• IT department: Tomeu Juan Costa, tomeu@marianojuan.com
• Retail sales: Antonio Munar, vendor@marianojuan.com
• Delivery-route sales: Llorenç Moyà, llorenc_moya@marianojuan.com
• Accounting: Baltasar Bennassar, admi@marianojuan.com
• Warehouse: Gabi Stoica, almacen@marianojuan.com

Other listed phone numbers: 971 795 177, 971 468 760, 971 434 007, 971 452 218, and 608 338 755.

Group and social media

The company is part of Grupo Gesco and is on Instagram and Facebook as @comercialmarianojuan.