- JagerJanssen architects BNA
- JAGRAM-PRO S.A.
- Jahn Lykouria Design
- Jahnke GmbH & Co.KG
- Jaime Ferrer Forés architect
- Jaime Furtado, Arquiteto
- Jaime Juárez Arquitectura
- Jaime Sepulcre Arquitecturas
- Jaipur Home
- Jaipur Pietre
- jaipur pietre srl
- Jaipur Rugs
- Jaipur Rugs
- JAJA Architects
- JAKA-BKL GmbH
- Jake Phipps
- JAKKO PLASTIK SAN. VE DIS TIC. A.S.
- JAKOB
- Jakob + MacFarlane Architects