[AngryData]

For a large part of residential construction if everything is new it only takes a few days to assemble for each step, the rest is just the logistics of choosing and buying the materials and getting delivery. Like even a large house can be entirely framed in a few days, a week at most, with two or three if all the materials are available and the frame design is finalized. With dimensional lumber construction there is a pretty simple way to stack and nail the floors then walls then ceilings then next floor if there is, then rafters. Work goes as fast as you can toss lumber and shoot nails. Everything so with simple blueprints of where the walls are, the height of the walls, and window and door placements. For a framer its like constructing with legos. Then a roof can be put on in half a day, siding 2-3 days, electrical and plumbing a day or two, drywall a day or two to hang and a day or two to mud and sand, painting can be done in a day or two. Getting decent trim might take longer, but it is also a more skilled and detail orientated work. With framing you can ignore 1/16th gaps and everything will settle and flex into a solid foundation. With pieces of trim a 1/16th gap could be a visible problem.

You could potentially go from nothing to an entire nearly finished house in 2 weeks worth of labor, however because the framers, electrocutions, plumbers, siding, flooring, drywall guys are often all separate contractors and the shipping for all those materials are all on different schedules it takes longer. Or if a few guys are doing it all, they will lose a bit of speed by not being specialists for each task, but can make up that time having a more centrally coordinated plan of attack.

Even then the permits and design planning and choosing the windows and siding and flooring and all that is often still the biggest speed bottleneck.