A building permit authorizes construction of a structure. A grading permit authorizes earthwork: excavation, fill, grading, and the movement of soil on a site. They are separate permits, issued by different departments (or different divisions within the same department), with different plan requirements and different inspections. Many projects require both, and the grading permit often must be obtained first because the site must be graded before the building foundation can be constructed.
What a Building Permit Covers
A building permit authorizes the construction, alteration, or demolition of a building or structure. The building department reviews the plans for code compliance: structural adequacy (IBC/CBC), fire and life safety, energy efficiency, accessibility (ADA/CBC Chapter 11B), plumbing, mechanical, and electrical systems. The building permit plan set includes architectural, structural, MEP (mechanical, electrical, plumbing), and site plans.
The site plan in a building permit typically shows the building footprint, property lines, setbacks, parking, utility connections, and finish grades around the building. But the building permit does not cover the earthwork needed to bring the site to those finish grades.
What a Grading Permit Covers
A grading permit authorizes earthwork operations: cutting and filling soil, creating building pads, constructing slopes, building retaining walls, installing site drainage, and shaping the terrain. The grading plan set typically includes:
- Existing and proposed topography (contour lines and spot elevations).
- Cut and fill areas with earthwork quantities.
- Slope ratios and slope heights.
- Retaining wall locations and heights.
- Site drainage design (swales, V-ditches, area drains, storm drain pipes).
- Erosion and sediment control plan (SWPPP if the project disturbs 1 acre or more).
- Geotechnical recommendations and how the grading design addresses them.
When Each Is Required
| Scenario | Building Permit | Grading Permit |
|---|---|---|
| New building on a flat, previously graded lot | Yes | Usually no (minimal earthwork) |
| New building on an ungraded lot requiring pad creation | Yes | Yes |
| Parking lot construction (no building) | No (unless structures like carports are included) | Yes |
| Retaining wall over 4 feet | Yes (structural permit for the wall) | Yes (for the earthwork behind the wall) |
| Site regrading only (no new structures) | No | Yes |
| Interior tenant improvement (no site work) | Yes | No |
| Swimming pool installation | Yes (building/pool permit) | Sometimes (depends on excavation volume) |
Grading Permit Triggers
The threshold for requiring a grading permit varies by jurisdiction but commonly includes any of the following:
- Earthwork volume. Moving more than 50 cubic yards of soil (IBC Appendix J, Section J103.1). Many jurisdictions adopt lower thresholds (as low as 20 CY).
- Cut or fill depth. Cuts or fills exceeding 5 feet in depth.
- Slope steeper than 3:1. Creating a slope steeper than 3 horizontal to 1 vertical.
- Disturbance area. Disturbing more than a certain area (commonly 5,000 SF or 10,000 SF).
- Drainage alteration. Changing the direction or volume of drainage flow off the property.
- Location in a hillside overlay zone. Many jurisdictions have hillside grading ordinances with lower thresholds or additional requirements for properties on slopes.
Who Prepares Each
Building Permit Plans
The architect prepares the architectural plans. The structural engineer prepares the structural plans. MEP engineers prepare the mechanical, electrical, and plumbing plans. The civil engineer typically prepares the site plan (showing utility connections, finish grades, and site improvements) that is included in the building permit set.
Grading Permit Plans
The civil engineer prepares the grading plans. The grading plans must be stamped by a licensed civil engineer (PE). In some jurisdictions, the geotechnical engineer must also stamp or co-sign the grading plans (or provide a letter stating that the grading design conforms to the geotechnical recommendations).
Review and Approval Timeline
| Permit Type | Reviewing Department | Typical First Review | Typical Total Time |
|---|---|---|---|
| Building permit | Building department | 4-8 weeks | 3-6 months |
| Grading permit | Public works / engineering | 3-6 weeks | 2-4 months |
Some jurisdictions allow parallel submittal (building and grading at the same time). Others require sequential submittal (grading first, then building). When the grading design affects the building design (pad elevation, retaining wall loads, drainage), it makes practical sense to finalize the grading design before completing the building plans, even if parallel submittal is allowed.
Inspections
Grading Inspections
- Pre-grading meeting (before any earthwork begins).
- Clearing and grubbing (after vegetation and debris are removed).
- Keyway and bench cuts (for fill slopes placed on existing slopes).
- Compaction testing (during fill placement, at intervals specified in the geotechnical report).
- Subdrain installation (before backfill).
- Rough grading certification (after all earthwork is complete, before building construction begins).
- Final grading (after all improvements are in, verifying drainage patterns and finish grades).
Building Inspections
- Foundation (before concrete pour).
- Framing (structural frame complete, before drywall).
- MEP rough-in (plumbing, electrical, mechanical before walls are closed).
- Insulation and moisture barrier.
- Final (occupancy readiness, fire safety, accessibility).
Sequencing: Which Comes First?
On most projects, the grading permit is obtained and rough grading is completed before the building permit is issued. The sequence is:
- Obtain grading permit.
- Perform rough grading (create building pads, slopes, drainage infrastructure).
- Obtain rough grading certification from the geotechnical engineer and civil engineer.
- Obtain building permit (the approved grading sets the pad elevations the building design is based on).
- Construct the building.
- Perform final grading (fine grading around the building, finish drainage connections).
- Obtain final grading inspection and building final inspection.
Some projects combine the grading and building permit into a single "combined" permit. This is common for smaller projects where the grading is minimal and directly related to the building construction (e.g., a single-family house on a flat lot with a shallow foundation excavation).
Common Mistakes
- Starting grading without a permit. Grading without a permit is a code violation that can result in stop-work orders, fines, and a requirement to restore the site to its original condition. This happens frequently when contractors begin site clearing before the grading permit is issued.
- Assuming the building permit covers site grading. It does not. The building permit site plan shows finish grades, but the grading permit authorizes the earthwork to achieve those grades. On projects with significant grading (pad creation, slope construction, retaining walls), a separate grading permit is required.
- Inconsistent grades between the two permits. The pad elevation on the building permit must match the pad elevation on the grading permit. If the grading plan shows a pad at 100.0 and the building plan shows finished floor at 100.5 (accounting for slab thickness), the dimensions must be consistent. Discrepancies generate plan check comments and construction confusion.
- Not getting a geotechnical report before the grading plan. The grading design should be based on geotechnical recommendations for slope ratios, fill compaction, setbacks from slopes, foundation depth, and drainage. Designing the grading without a geotechnical report risks plan check rejection and redesign.
Have a project like this?
We can scope the civil engineering work and get you a proposal — usually within a week.