A transfer seat assembly (100) comprising a support (110) forming a generally planar surface for supporting a user, an anchoring bracket (300) for anchoring the transfer seat assembly (100) to at least one structure of a vehicle, and a coupling mechanism (200) for coupling the support (110) to the anchoring bracket (300). The anchoring bracket (300) comprises an elongate shaft (310). The coupling mechanism (200) comprises a height adjustment mechanism (210) for adjusting the support (110) in a direction substantially normal to the generally planar surface. The height adjustment mechanism (210) comprises a height block (210) sized to at least partially surround the elongate shaft (310) of the anchoring bracket (300) and configured for slidable movement in either direction along the length of the elongate shaft (310). The coupling mechanism (200) preferably comprises one or more additional adjustment mechanisms such as a tilt adjustment means (220, 270) or means to extend the support away from the anchor (120, 230). The device provides a disabled user with an intermediate place to sit to transfer themselves between a wheelchair and a vehicle, for example.