There's a good chance your home is more energy-efficient than an office building. This can go either way, and perhaps modern office buildings would win, but my experience with ridiculous behavior around heating and aircon provides a counterbalance. As for water use, I think people drink and use the restroom at the same rate, regardless of whether they're at home or in the office, so the only difference here is who's footing the bill - which is irrelevant in terms of emission reduction.

On top of commute, if you work in an office, you also probably eat out or take delivery - both being arguably much more wasteful than eating at home.