"Medical providers must not make weight loss or weight gain related intervention a condition for treatment."
"Employers must strive to maintain a respectful, non-hostile environment related to weight and height. Verbal or written harassment against an employee based on weight or height is prohibited. Unsolicited comments, advice, or literature recommending weight loss or gain are inappropriate."
"If a tenant needs and requests an accommodation because of weight or height, it must be made if it is readily achievable. Some examples of alterations that are usually readily achievable include: installing offset hinges to widen doorways, rearranging furnishings, lowering mirrors or replacing shower doors with shower curtains. The need or potential need to make an accommodation may not be considered as a factor in the decision to select a tenant."
[1] http://sf-hrc.org/sites/sf-hrc.org/files/migrated/FileCenter...
The "widening doorways" thing might be a bit too much unless the person in question actually has a medical condition though.