Key Takeaways
- •SAM.gov is free and covers all federal agencies — register before you need it (1–3 day activation).
- •State procurement portals are separate from federal — most subs miss 60–70% of public bid volume by not checking both.
- •NAICS codes 236, 237, and 238 cover construction broadly — use 6-digit codes for your specific trade to filter accurately.
- •Set-aside filters (8(a), HUBZone, WOSB, SDVOSB, small business) reduce competition to 3–8 bidders vs. 15–30 on open competitions.
- •Email alerts on each portal beat manual checking — configure them once and let opportunities come to you.
Federal vs. State vs. Local: The Three-Tier Framework
Tier 1 — Federal (SAM.gov)
All federal agencies must post solicitations above $25,000 on SAM.gov (System for Award Management). This includes the Army Corps of Engineers, GSA, VA, NAVFAC, Air Force Civil Engineering, and hundreds of smaller agencies. Federal bids include robust set-aside programs, prevailing wage requirements under Davis-Bacon, and certified payroll (WH-347) obligations. Registration is free; create an account at sam.gov and activate your entity registration to bid.
Tier 2 — State Agencies
State departments of transportation, education, corrections, and general services post bids on state-run procurement portals. State DOTs are among the largest sources of public construction work — road resurfacing, bridge work, utility line installation, and right-of-way clearing generate thousands of solicitations annually. State prevailing wage laws (like California's Little Davis-Bacon under Labor Code § 1771) apply to these contracts.
Tier 3 — Local Agencies (Counties, Cities, Schools)
County governments, city public works departments, school districts, water authorities, and transit agencies post bids on their own websites or through third-party aggregators like DemandStar, BidNet, or Onvia. This tier is the least centralized and the most work to monitor, but it also has lower competition — fewer subs are watching local agency portals. School construction and renovation projects are particularly active in this tier.
NAICS Code Strategy for Construction Subs
NAICS codes are the primary filter on SAM.gov and most state portals. Using the right 6-digit code is critical — too broad and you get irrelevant notices; too narrow and you miss relevant work.
| NAICS Code | Description | Typical Subs |
|---|---|---|
| 238110 | Poured Concrete Foundation and Structure Contractors | Concrete subs |
| 238160 | Roofing Contractors | Roofers |
| 238210 | Electrical Contractors | Electricians |
| 238220 | Plumbing, Heating, and Air-Conditioning Contractors | Plumbers, HVAC |
| 238290 | Other Building Equipment Contractors | Fire suppression, specialty MEP |
| 238310 | Drywall and Insulation Contractors | Drywall, framing |
| 238320 | Painting and Wall Covering Contractors | Painters |
| 238330 | Flooring Contractors | Flooring installers |
| 237310 | Highway, Street, and Bridge Construction | Civil, paving, striping |
| 237110 | Water and Sewer Line Construction | Utility subs |
Tip: Register multiple NAICS codes in your SAM.gov entity profile — you can list all codes relevant to your firm. This improves your visibility to primes looking for subs and ensures set-aside checks are accurate.
State Procurement Portal Directory
The 8 largest states by construction volume — plus key notes on DOT portal separation.
| State | Portal Name | Notes |
|---|---|---|
| California | Cal eProcure | Covers state agencies; Caltrans uses separate portal for DOT-funded work |
| Texas | TxSmartBuy | TxDOT uses separate portal for highway construction; check both |
| Florida | MyFloridaMarketPlace (MFMP) | Covers most state agencies; FDOT bids posted separately |
| New York | NYS Contract Reporter | All state agency solicitations required to be posted here |
| Illinois | BidBuy | IDOT highway work posted separately on IDOT procurement site |
| Washington | WEBS (Washington eProcurement) | WSDOT uses WSDOT Consultant Services Portal for engineering work |
| Ohio | Ohio Procurement (IntelliSource) | ODOT bids listed at ODOT Opportunity site |
| Pennsylvania | eMarketplace | PennDOT uses eMarketplace plus separate eNotify email system |
Certification Set-Aside Filter Walkthrough
On SAM.gov, after entering your NAICS code and location, use the "Set-Aside" filter to narrow to opportunities where your certification confers a competitive advantage. Here is what each set-aside means for your search:
Small Business Set-Aside
Reserved for firms meeting SBA size standards by NAICS. Most construction NAICS codes have a size standard of $19M–$45M annual revenue. This is the broadest set-aside — still competitive but eliminates large GCs.
8(a) Business Development
Reserved for SBA-certified 8(a) firms. Solo-sourced contracts possible up to $4M (construction). Competition limited to other 8(a) firms when competed. Very high win probability for firms in the developmental stage.
HUBZone Set-Aside
Reserved for SBA HUBZone-certified firms. Also provides a 10% price preference on full-and-open competitions (your bid is evaluated as if 10% lower than non-HUBZone competitors). Effective for firms in designated zones in urban cores or rural areas.
Women-Owned Small Business
Reserved for SBA-certified WOSB firms in industries where women are underrepresented. Construction is designated as underrepresented, making this set-aside broadly applicable. EDWOSB (Economically Disadvantaged WOSB) has additional net worth requirements but the same competitive pool.
Service-Disabled Veteran-Owned Small Business
Reserved for veteran-owned firms with service-connected disability. VA contracts strongly favor SDVOSB; also used across civilian agencies. Since 2023, certification is administered by SBA (moved from VA). Apply at certify.sba.gov.
Saved Search Tactics for SAM.gov
A saved search on SAM.gov will email you new matching opportunities daily or weekly. Here is how to build a high-signal search:
- 1Navigate to Contract Opportunities — on SAM.gov, go to Search > Contract Opportunities. Do not search from the home page (it searches all award types).
- 2Set NAICS — enter your primary NAICS code (e.g., 238210 for electrical). If you cover multiple trades, create separate saved searches for each code.
- 3Set Place of Performance — filter to your state(s) or specific counties. Radius filtering is not available on SAM.gov, so use state + county filters or create state-level searches.
- 4Apply Set-Aside filters — if certified, select your applicable set-aside type. If not certified, either omit the filter or select "Small Business" to see all small-business set-asides.
- 5Save and name clearly — click "Save Search," name it descriptively (e.g., "Electrical 238210 – TX – HUBZone"), and select daily email notification. Create a dedicated email folder for SAM.gov alerts.
Related Tools
SAM.gov Saved Search Builder
Configure trade, state, NAICS, and set-aside filters to generate a ready-to-use SAM.gov search URL.
Trade Certification Fit Checker
Select your trade, certifications held, and business size to see which set-aside categories you qualify for.
Service Area Radius Map
Visualize your bidding radius by address and distance to see which projects fall in range.
Frequently Asked Questions
Get bid alerts matched to your trade, certifications, and service area
Sub-Hub monitors federal, state, and local agency portals and sends you matched opportunities — no more manual portal checking.
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