A lift station or forty fewer lots, with three weeks to decide
Here is a mid-project decision worth working through as a room, because the mechanics repeat on almost any site that drains two ways. Take 112 acres rezoned last year with a preliminary plat approved for 296 lots at an average of 62 foot fronts. About 70 percent of the site falls toward an existing gravity sewer at the south boundary. The remaining 30 percent, call it 96 lots, sits on the other side of a ridge and cannot reach that main by gravity. Option A is a lift station and force main to serve the 96. An engineer's opinion of probable cost lands at $1.35 million all in, and the city adds a maintenance escrow and a redundancy standard that rarely makes it into the original budget. Call it $1.5 million, or about $15,600 per lot for those 96 lots on top of a base improvement cost of $41,000 a lot. Those lots go to roughly $56,600 all in against a finished lot price of $78,000 to $82,000 in that kind of submarket. Option B is dropping the north side to large lots on septic. Say perc results come back marginal in two of five test pits. Best case is 26 lots at roughly 1.5 acres, priced at a level production builders generally will not take because they do not build that product. Those go to individual buyers over years, which is a different business with a different sales cost. Option C is pumping to a neighboring development's existing lift station under a capacity share agreement, assuming that station has headroom. That is a private negotiation plus city approval plus a cost share nobody has scoped. Now set the constraints an operator in that position usually carries. The loan is drawn 40 percent, month 14 of a projected 30 month buildout, and a first phase of 88 lots closes to a builder next month at $79,500, which funds the phase after it. Phase 2 engineering has to be final in three weeks or the paving crew's window is gone and the whole thing slips to spring. Option A pencils thin. Option B changes the business. Option C is a maybe with no numbers attached. What does that three-way framing leave out?