How a rock ledge under the driveway nearly ate the margin on a spec build, laid out with the full numbers
Take a lot bought for 62,000 cash and a finished house that closes at 452,000, eleven months from first excavator to closing table, for a builder new to ground-up construction after owning a couple of small buildings. Worth laying out in full since these numbers rarely get shared this plainly. The house: 1,780 square feet, three bed, two bath, one story, on a flat-ish infill lot in a neighborhood built mostly in the 1970s where everything sells fast. What it costs: Lot: 62,000 Soft costs (plans, survey, engineering, permits, impact fee): 21,400 Site work: 33,800 Vertical construction: 244,000 Loan interest and fees: 18,900 Taxes, insurance, utilities during the build: 3,600 Total: 383,700 Sold at 452,000, minus 27,500 in commission and closing costs, nets 424,500. Profit 40,800. A few terms worth defining plainly. A construction loan funds in draws, meaning the bank pays out in chunks as work gets completed and inspected, not all up front. A CO is the certificate of occupancy, the document from the county saying a person may legally live in the house. An allowance is a dollar figure the builder writes into the contract for something not yet picked, like flooring, with the buyer paying the difference for anything nicer. The near miss: site work budgeted at 19,000 comes in at 33,800 when a rock shelf about four feet down runs under what becomes the driveway and garage slab. Two weeks of hammering, and a bank that won't increase the loan for it turns 14,800 into an out-of-pocket hit in a single week. Had the shelf run under the whole footprint instead of a third of it, the outcome looks very different. A second scare: a framing crew that vanishes for 19 days for a bigger job across town, with no contractual hold in place. Paying the balance of the framing draw two days after completion instead of at month's end is often the only lever that brings a crew back. What holds up: locking the lumber package price at permit issuance instead of at order, and a rule that no change over 500 dollars happens without a signed approval first. What to change: paying for test pits before closing on the lot, a few hundred dollars against a 14,800 surprise.