I think it is done frequently in commercial development, just not as a product that would be sold directly. The whole point of hiring an architect is so that y

I think it is done frequently in commercial development, just not as a product that would be sold directly. The whole point of hiring an architect is so that you don't have to build that team within your own company. Even if you bought a set of blueprints you still need expertise to check, adjust, sign-off and take responsibility for that. And you have to get all that through corporate management and politics. All for something that is probably not your core business. You might as well hire an architect. And I doubt that the plans are even a large proportion of the price. There is communication, project management, scheduling, keeping aligned with all the other specialists, insurance, legal fees and just normal overheads. And when you want to build another building of a similar design the architect can reduce their fees to take advantage of reusing existing content. The architect becomes the go-to for a particular kind of development and can win bids based on experience. If you can do it in-house the designs become proprietary and won't be shared externally.