A transfer seat to be used in conjunction with a toilet improves access to sanitary facilities by the disabled. The transfer seat may be used as one element of a modular system for improving bathroom fixtures designed for use by the handicapped. This modular system includes a transfer seat to be used in conjunction with a toilet; a hand rail assembly designed for use with the transfer seat; and a shower distribution system designed for use with the hand rail assembly. The components of this modular system may be used separately or together.