Builders need grading done to the plan, on schedule, and in a way that passes the final inspection. We set the pad, rough grade around the foundation, and finish grade the lot with positive drainage and erosion control in mind.
Site Grading for Builders in Boise and the Treasure Valley
On a new home or small commercial building, grading happens more than once. The pad gets cut before the foundation. The lot gets rough graded after backfill. The final grade goes in right before the inspection. Each pass has to hit the elevations on the plan, and the last one has to hold up through the first spring.
We work with builders, general contractors and owner-builders in Boise, Meridian, Eagle, Star, Nampa and Kuna, and we're based in Caldwell. We fit each pass into your build schedule, from the pad cut through final grade, and come back for the next stage when the lot is ready for it.
Working to the Grading Plan
Most subdivision lots and many infill lots come with a grading plan or plot plan. It shows finished floor elevation, pad elevation, spot grades at the corners and the direction water has to leave the lot. We grade from the surveyor's stakes and the benchmark on the plan, and we check elevations as we go rather than at the end.
When the ground doesn't match the paper, like a neighboring lot that was built higher or a corner that comes in lower than shown, we call you before we improvise. The engineer or the plan sets the grade. Our job is to hit it, and to flag it early when something doesn't add up.
Infill lots in older Boise neighborhoods often have no formal grading plan. There we work from the plot plan, the finished floor height and the existing grades along the property lines, and we talk through the drainage route with you before we cut.
What We Need to Bid Your Lot
- Grading plan or plot plan. Elevations, finished floor height and which way water leaves.
- Soils report, if there is one. It can set the fill material and compaction requirements.
- Your schedule. When the foundation, framing and flatwork crews are planned.
- Staking. Who sets the stakes, usually your surveyor, and when they'll be out.
- Dirt plan. Whether extra dirt stays on the lot or has to be exported.
If the plans call for compaction testing, a third-party geotechnical firm does it. We place fill in lifts to the plan and time the work so the tester can check each stage before we cover it.
Grading Through the Build
Before the foundation
We strip topsoil, cut or fill the pad to subgrade, and compact it. If footings or a crawlspace are part of the dig, see foundation excavation. For lots that need a deeper cut into a slope, our site cut for new homes page has more.
After the foundation
Once the walls are waterproofed and the inspector has signed off, we backfill in lifts and rough grade the lot. The point at this stage is to move water away from the foundation during framing, so the crawlspace or basement doesn't fill every time it rains. Rough grade also gives the framers and the flatwork crew a usable site.
Finish grade before the final
Finish grade is the last pass before landscaping and the final inspection. The building code calls for at least 6 inches of fall in the first 10 feet away from the foundation, and inspectors check it. We set that slope, shape the swales, and leave the topsoil ready for the landscaper or the homeowner.
Swales and Positive Drainage
Positive drainage means every surface around the building sends water away from it and off the lot by a planned route. On tight subdivision lots in Meridian and Star, that route is usually a shallow swale down the side yard between houses, placed so it doesn't push water onto the neighbor. Fences, window wells, AC pads and landscaping all end up in that side yard later, so the swale has to be clear and well defined from the start.
Driveways, walks and patios should pitch away too. Where grade alone can't carry the water, drainage solutions like a buried drain line may be part of the plan. Downspouts matter as much as grade. If they dump water at the foundation, even a good slope can't keep up, so decide where each one discharges before finish grade is set.
Erosion and Track-Out Control
Cities in the valley expect sediment to stay on the lot. On a typical home site that means silt fence or wattles on the low side, protection on nearby storm inlets, and a gravel construction entrance so trucks don't drag mud into the street. Clay sites in spring and fall are the hard ones. We grade with those controls in mind and work around them instead of tearing them out, and getting to finish grade and topsoil sooner helps get bare ground covered.
Stormwater Rules for Sites Over an Acre
Projects that disturb an acre or more generally need construction stormwater permit coverage before ground is broken. The permit holder, usually the owner or GC, is responsible for the plan and the inspections that come with it. A lot under an acre can still fall under that coverage when it's part of a larger subdivision being built out, so check with the developer. Our subdivision earthworks page covers bigger developments.
Why Builders Work With Us
Tanner bids from your plans, gives you a clear number, and shows up when he says he will. Our reviews describe us as "professional, efficient and highly skilled" and mention quick bids and getting to the job before the rains came. We're an Idaho registered contractor (RCE-65836) with a 5.0 rating on Google. Call (208) 697-2429 or request a free estimate.
