Surface immobilization of conjugated polymers to functionalized surfaces by their end-point to afford polymer brushes would be an interesting alternative for high-performance, long-term operation organic (opto)electronics, possibly helping charge injection and charge transport processes which are crucial for many devices. In this review we focus on the recent developments in the synthesis of conjugated semiconducting polymer brushes via a surface-initiated “grafting from” approach, along with their key physical/morphological properties, and their response in organic (opto)electronic devices.