You'll be paying for your own utility costs (power and water), so your utility bill will probably double. Make sure your salary is high enough to cover those extra costs.

Does the company already have a good system in place for remote collaboration, e.g. Slack channels for asynchronous standups, shared calendars, Confluence documentation, screen sharing tools for pairing, Google Hangouts, a healthy PR and code review process? Those tools and processes will need to be habitual for you to be a productive member of the team.