Land clearing comes first, then rough grading, then utility trenching for sewer, water, and electrical, then storm drainage, and compaction of the house pad happens last, right before the foundation crew shows up. Run that order backward, even by one step, on a lot in Tehama, Butte, or Shasta County, and you end up paying to redo work that was already finished once. This isn't a preference. It's how water, soil, and county inspections actually work together on a build site.
Walberg, Inc. plans the site work sequence for general contractors and property owners building new construction, ADUs, and shops across Northern California, and the same mistake shows up every year: someone hires each trade separately, on its own schedule, and the pieces don't line up. A well-run site moves through the same handful of steps in the same order every time, whether it's a rancher off Corning Road putting in a pole barn or a GC building three spec homes in Chico.
Why the order matters more than the calendar
Every step in site work either sets a condition the next step depends on, or it doesn't. Grading sets the finish elevation everything else references. Utility trenches need that elevation locked in before anyone can calculate pipe slope or trench depth correctly. Compaction has to happen after the trenches are backfilled, not before, or the fill settles unevenly under a slab that's already poured. Skip a step out of order and you're not saving time. You're borrowing it from the end of the project, usually with interest.
A GC who pours a house pad before the sewer and water lines go in has to cut back into a pad that's already been compacted to spec, and that cut has to be recompacted and reinspected before the foundation crew can touch it. A property owner who runs the electrician's trench before rough grading sets final elevation ends up with conduit that's either too shallow once the grade drops, or buried under two extra feet of fill nobody planned to move.
The sequence, start to finish
| Step | What happens | What it depends on |
|---|---|---|
| 1. Land clearing | Trees, brush, stumps, and old structures come off the building envelope | Dry ground; wet clearing tears up the surface you're about to grade |
| 2. Rough grading | Cut and fill sets the pad's finish elevation and drainage slope | A grading permit in most of Tehama, Butte, and Shasta County, plus dry, workable soil |
| 3. Utility trenching | Sewer, water, and electrical conduit go in against the elevation grading just set | Rough grade being finished, so trench depth and pipe slope are measured off real numbers, not a guess |
| 4. Storm drainage | Catch basins and drain lines route runoff to a legal discharge point | Trenches for other utilities, coordinated so the crew isn't opening the same ground twice |
| 5. Compaction | Fill gets densified in lifts and verified by a geotechnical engineer | All trenching finished and backfilled; a compacted pad that gets cut open again has to be redone |
| 6. Foundation handoff | The pad is inspected, signed off, and turned over to the framing crew | Everything above, done in order, with paperwork to show for it |
Two of those steps can run side by side instead of strictly in sequence. Sewer, water, and electrical trenching often happen together in the same mobilization, since it's the same excavator and the same open ground either way. Storm drainage sometimes shares that window too, if its discharge point and the utility route don't cross paths. What can't move is compaction. That step is always last, right before the pad gets handed off.
Where this actually breaks down
The most common failure isn't skipping a step. It's running the steps through three or four different crews on three or four different schedules that never talk to each other. A property owner hires an excavator for grading, a separate plumber for the sewer line, and an electrician for the trench, each booked around their own calendar instead of the site's actual sequence. The plumber shows up before grading is done and has to guess at final elevation. The electrician shows up after the pad is already compacted and has to cut it open again.
Any one of those trades can do solid work on its own. None of them is responsible for making sure the others show up in the right order. That's the actual value of coordinating grading, excavation, sewer and water lines, and storm drains under one contractor instead of four separate ones: one schedule, one crew that already knows what the next step needs before it starts.
Utility trenching has its own rules once grading is done
Before any trench opens, whoever's digging has to call USA North 811 at least two full business days ahead so gas, water, sewer, and communication lines get marked. That call happens regardless of who's doing the digging or how many trades are involved, and skipping it is how a backhoe finds a line the hard way. Once the locate is in hand, sewer and water trenches need a minimum horizontal separation from each other under most local plumbing codes, so they get planned side by side rather than stacked or crossed without a look at the drawing first.
Grading permits in Tehama, Butte, and Shasta County each trigger at a different volume of cut and fill, and review can take weeks once an application is filed. The part that catches people off guard on sequencing specifically: that review has to clear before equipment moves, which means the application needs to go in while the site plan is still being finalized, not after an excavator is already booked. Tehama County Public Works posts current permit forms and review timelines, and Butte and Shasta counties run similar processes through their own building departments. Filing late doesn't just delay grading. It pushes every step behind it back by the same number of weeks.
Timing it against the wet season
Late summer through mid-October is the window to run this whole sequence in one push, for the same reason it's the best time to grade land in Northern California: dry soil compacts to spec, and equipment doesn't tear up access roads getting to the site. Start the sequence now, in late September, and a typical single-family lot can clear compaction and be ready for framing before the rain sets in. Start in November instead, and grading alone can stall for weeks waiting on a dry stretch, before utility trenching or compaction even get scheduled.
If you're planning a spec home, an ADU, or a shop for next spring, the honest move is to start the sequence now rather than in February, once the ground finally dries out enough to move equipment on it. We've had general contractors lose six weeks off a spring framing start because grading didn't clear until March.
Common Questions
Can utility trenching happen before grading is finished?
Not accurately. Sewer, water, and electrical trenches get cut to a depth measured against finish grade, and if that grade isn't set yet, the depth is a guess. It's faster in the long run to finish rough grading first, even if the utility crew has to wait a few extra days to mobilize.
Do sewer, water, and electrical trenching need to happen in a specific order relative to each other?
Not usually. They're commonly run together in the same mobilization since they disturb the same ground with the same equipment. Local plumbing code does require a minimum horizontal separation between sewer and water lines, so the two trenches get planned and marked out side by side rather than crossed without coordination.
What happens if compaction gets done before the utility trenches are backfilled?
The trench backfill settles at a different rate than the compacted pad around it, and that uneven settling can crack a slab or foundation later. That's why compaction always comes last. A pad compacted before trenching is finished has to be cut open again, then recompacted and reinspected before it counts toward the permit.
How long does the full sequence take on an average residential lot?
Land clearing and rough grading typically run one to two weeks combined, depending on lot size and soil. Utility trenching adds a few more days to a week. Compaction and final inspection can add several more days once trenching is backfilled. Permit review runs alongside or ahead of the physical work and is usually the longest single piece of the calendar.
Does a general contractor need to hire one company for the whole sequence?
No, but coordinating it under one contractor removes the scheduling risk of three or four separate trades working off three or four separate calendars. Using separate contractors for grading, utilities, and drainage puts the GC or property owner in charge of making sure each crew shows up in the right order, which is a real job on its own, on top of everything else a build already asks of them.
Bottom line
The sequence matters more than any single step inside it. If you're planning site work for a new build in Tehama, Butte, or Shasta County, get your grading permit application moving before you book any equipment, and line up grading, utility trenching, and compaction with one contractor if you can, so the order isn't left to chance. Request a free estimate and we'll walk the site and lay out the actual sequence for your lot before you commit to a start date.