Budget · July 2026 · 6 min read
The overage is almost never the kitchen. It is what happens before the slab.
When a custom home goes 20 percent over, people assume somebody got carried away at the tile showroom. In our experience the money leaks out of the ground long before anyone picks a finish.
Here are the seven items that most often arrive uninvited on a Northern CA build, and roughly what they run in this market.
A rural parcel can sit 600 ft from the nearest transformer. Dry utility trenching, joint trench coordination, a well or a water meter and a septic system carry real money on their own, and none of it shows up in a per-sq-ft rule of thumb.
Hillside lots look like a view and price like an earthworks project. Moving dirt is cheap. Hauling it off site is not. Export by the truckload is the single most common surprise on foothill jobs.
Expansive clay or a low bearing capacity can push you from a conventional footing into a post-tension slab, piers or an over-excavation. That is a large swing in the budget, decided by a soils report that is cheap by comparison.
Chapter 7A materials, ember-resistant vents, dual-glazed tempered windows and the required clearance work are not optional in a wildland urban interface zone, and much of Placer and El Dorado county is in one.
Engineered walls, subdrains, swales and area drains rarely make it into an early estimate because they get designed late. On a sloped site, budget for them from day one.
Windows, steel and specialty appliances can carry 20 to 40 week leads. Order late and you either pay to expedite or pay the general conditions of a stalled site. Both cost real money.
Placeholder allowances for cabinetry, tile, plumbing fixtures and lighting are where budgets go to die. Price the actual scope you want early, even if you change it later. A number you have argued with is worth ten you have not.
We would rather have the hard conversation in pre-construction than in month five. Send us the parcel and we will tell you what the dirt is likely to cost.
