Excavation & Site Work · Government contracting
Excavation & Site Work Government Contracts & Bids
Last reviewed August 14, 2026 · How we source this
Nearly every public construction project starts with site work — clearing, grading, earthwork, and underground utilities. Excavation and site-prep contractors win this work as subcontractors on building and road projects and as prime contractors on standalone grading, demolition, and utility jobs.
NAICS codes for excavation & site work contractors
- 238910 — Site Preparation Contractors
- 237110 — Water and Sewer Line and Related Structures Construction (utility work)
Not sure which codes apply to your business? See the NAICS code definition in the glossary.
Typical government excavation & site work projects
- Grading, earthwork, and site preparation for public buildings and roads.
- Underground utility trenching and installation — water, sewer, storm, and dry utilities.
- Demolition and site clearing.
- Erosion control and stormwater work.
- Mass and structural excavation for building foundations.
Where the work is
Site work is bid at every level — as a subcontractor to general contractors on public buildings, as a subcontractor or prime on DOT road projects, and as a prime on standalone grading, demolition, and utility contracts posted by city and county public-works departments. Federal projects post on SAM.gov.
You can also browse opportunities by state to see how the work is posted where you operate.
What it takes to win excavation & site work bids
- You'll work as both prime (standalone grading, utility, and demolition) and subcontractor (the site package under a GC or civil prime) — set both roles in your profile.
- Prevailing wage / Davis-Bacon usually applies on public site work.
- Underground utility work often requires specific licensing or certifications — confirm the jurisdiction's requirements.
- Bid, performance, and payment bonds are standard; demolition and utility work may carry extra insurance and permitting requirements.
- Accurate earthwork quantity takeoffs make or break margins on low-bid site work.
For the full pursuit process, read How to Win Government Contracts.
Excavation & Site Work government contracting FAQ
What NAICS code do excavation and site-work contractors use?
What NAICS code do excavation and site-work contractors use?
The primary code is NAICS 238910, Site Preparation Contractors, covering grading, excavation, and site prep. Utility line work falls under 237110 and road-related civil work under 237310. Carry the codes that match what you self-perform.
Where is government excavation and site work posted?
Where is government excavation and site work posted?
Site packages are often subcontracted under general contractors on public buildings and under civil primes on DOT road projects. Standalone grading, demolition, and utility contracts are posted by city and county public-works departments, and federal work is on SAM.gov.
Do excavation contractors bid as prime or subcontractor?
Do excavation contractors bid as prime or subcontractor?
Both. Standalone grading, utility, and demolition contracts are bid as prime work, while the site-preparation scope on a building or road project is usually performed as a subcontractor. Set both roles in your profile so all of it surfaces.
Find excavation & site work contracts that match your business
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