When we did the math (over 20 years ago), the difference between cubes and private offices was about $500 a year per person (At roughly $20 per square foot). Ou

When we did the math (over 20 years ago), the difference between cubes and private offices was about $500 a year per person (At roughly $20 per square foot). Our average developer cost was close to $100K a year, so a 1% increase in productivity would have paid for it. The cost difference between one person and two person offices is so trivial to never be worth considering. The real problem is when you are getting an allowance from your landlord for build-out as part of your lease. In that case the landlord is going to fight very hard for you to build two person offices (or open space) because they'll perceive it as far easier to re-let if you leave.