4476 is a community team, and consequently we have had to figure this out ourselves!
In the early stages of our team (ie 2013/2014), we built out of a garage and basement at the house of one of our lead mentors. However, with team growth and the desire to become more sustainable, we recognized that this was not going to be suitable for our needs in the future. Regardless, it worked well enough when we needed it to while we were smaller.
In 2015, we partnered with the City of Kingston and the Pump House Steam Museum to form a mutually beneficial relationship which resulted in us finding a more permanent build space. From 2015-2018 we worked out of this space (primarily during the school year as the museum would close in the winter to the general public), and when the museum underwent renovations, they built us a table suitable for an FLL table and considered needs we may have. That partnership has been fantastic.
However, with renovations it meant we were not able to stay there this year full time. During the offseason, we would occasionally host meetings at rooms booked by the FRC alumni chapter of our local university, or at mentors houses. During build, the city relocated us to a conference room at a local hockey arena (Cataraqui Arena) for a few weeks, but then on stop build day we had to move again to a space they had left empty in the Harold Harvey Centre (which is shared between us and a local performance theatre). This is where we are currently staying.
Overall, if you can form a relationship with your municipality I would certainly recommend it. It means you don’t have to rent and is, in my opinion, more sustainable than renting. If this isn’t something you can do, certainly ask your sponsors as they will be more than happy to help you or point you in the direction of someone who can.