I had a great office layout which was a large room with 10-25 developers and managers as the team grew. The key factors which made the office work well was: ple

I had a great office layout which was a large room with 10-25 developers and managers as the team grew. The key factors which made the office work well was: plenty of space per developer (L shaped desk about 8x8ft), generally courteous noise levels, and a a few other rooms for louder work or larger conversations (meeting room, lab, extra rooms). Collaboration was great which was important for a new project. I think for an existing long running project less collaboration may be necessary and extra separation may be better for productivity.