Phasing a 46 lot subdivision versus delivering all lots at once

Take a 46 lot subdivision with a single entrance, where an engineer can plat it as one phase or split it into two phases of 23. Two phase typically costs more in total, often in the range of $60k, because mass grading and erosion control get mobilized twice even though the storm outfall has to be built for the full build-out either way. What that premium buys is revenue roughly eighteen months sooner on the first 23 lots, which pays down the development loan and takes real carry off the second half. What it costs is that a builder buying the whole site would usually rather close on all 46 at once, and a half-finished subdivision can show worse to a retail buyer if any lots end up sold individually. The way to think about it is carry cost against optionality. If the development loan's interest rate makes carrying 46 lots for the full build-out expensive relative to $60k, phasing wins on the numbers even though it costs more in total dollars, because it moves cash forward when it is worth more. If the buyer pool is dominated by one builder who wants a single closing, that preference can outweigh the carry savings, since losing the buyer altogether costs more than the phasing premium ever would.