how are you going to put this in a way where you can make a strong case for spending more on facilities? you can easily make a case for saving money with open p

how are you going to put this in a way where you can make a strong case for spending more on facilities? you can easily make a case for saving money with open plan and showing how much you can save, what about the reverse? how can you justify spending 2x what your competitors spend on rent? how can you quantify "lost productivity due to constant interruptions" or "more bugs due to developers not being able to focus" in an accountable way? Also, are the people that make the budget decisions the type of people that thrive on collaboration and open plans, or the type of people that prefer quiet and isolation? if they are the type of people that thrive on open plans they might feel negatively about private offices period, which leads to making your case about their positives even harder. On one hand you have hard data, open offices cost x, open plan costs x/2, on the other hand you have "engineers say they could be more productive with offices" against "do you remember when we were small and working in a single room, that was awesome, we were so agile and communicative" (whether or not that is applicable at your particular company size or stage, burning the midnight oil on your stack to cobble together a demo for a pitch is not the same as writing production level tricky security code)