N°03 — Sub-Hub Trade Bids
Concrete Bids for Subcontractors
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Concrete bid opportunities are not limited to one phrase. Public owners and general contractors describe the same work as concrete, flatwork, foundations, slabs, curb and gutter, paving, sidewalks, formwork, rebar, ready-mix, site concrete, or structural concrete work. A useful concrete bid page has to watch those terms together, not as separate searches.
ConstructionBids.ai monitors 12,500+ public bid portals and helps subcontractors turn that spread of source language into a workable daily search. Sub-Hub Free lets concrete firms start without a credit card. Sub-Hub Pro adds the full match-score breakdown, AI scope analysis, alerts, saved bids, and document access for $39/mo after a 7-day free trial.
Use this page as a reference for where concrete bids appear, how GC bid invitations usually reach concrete subs, and what to prepare before asking to be added to a GC bid list.
| NAICS | 238110 Poured Concrete Foundation and Structure Contractors |
|---|---|
| CSI | Div 03 Concrete, Div 32 Exterior Improvements |
N°02 — Live Public Bids
Open Concrete Bids Right Now
426 open concrete bids across 26 states on public portals. Updated Aug 22, 2026.
Every listing is a public solicitation posted by an agency or public owner — not a GC invitation. Smaller trade contracts can often be bid directly; larger prime bids show you which projects to price for the GCs bidding them.
| Project | Agency | Location | Bid due |
|---|---|---|---|
| ENTERPRISE RESOURCE PLANNING (ERP) / FINANCIAL MANAGEMENT SYSTEM REPLACEMENT | Arkansas Purchasing Group | AR | Aug 24, 2026 |
| Law Enforcement Liaison | Idaho Purchasing Group | ID | Aug 24, 2026 |
| Concrete | Kansas Purchasing Group | KS | Aug 24, 2026 |
| Pedestrian Ramp | SC Commission for the Blind | SC | Aug 25, 2026 |
| Dell Server Warranty Renewals & Replacements | Rocky Mountain E-Purchasing System | CO | Aug 25, 2026 |
| Moscow East City Park Stage Replacement | Idaho Purchasing Group | ID | Aug 25, 2026 |
| 22 FSS Auto Lift Replacement | Kansas Purchasing Group | KS | Aug 25, 2026 |
| WB GRANT AVENUE BRIDGE APPROACH SLAB REPLACEMENT (GRANT AVENUE OVER REPUBLICA... | Kansas Purchasing Group | KS | Aug 25, 2026 |
| Audio Microphone and Sound System Replacement | Kentucky Purchasing Group | KY | Aug 25, 2026 |
| UND WITMER HALL HEAT EXCHANGER REPLACEMENT | North Dakota Purchasing Group | ND | Aug 25, 2026 |
| Concrete Foundation S-26-20 | Nebraska Purchasing Group | NE | Aug 25, 2026 |
| Veterans Plaza Gutter Replacement | Tennessee Purchasing Group | TN | Aug 25, 2026 |
N°03 — Award Statistics
What Concrete Public Work Actually Wins For
Based on 957 awarded public concrete projects across 11 states, drawn from public bid tabulations (2009-2026).
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N°04 — Beyond Public Portals
How GCs invite concrete subs
Sub-Hub itself lists direct public solicitations. The notes below cover the separate GC-invitation channel that runs alongside them, and how to get on those lists.
GC concrete invitations usually start from a bidder list built around crew capacity, finish quality, formwork experience, service geography, bonding capacity, safety record, and whether the project is structural concrete, site concrete, or paving. The invitation can arrive through a plan room, bid management platform, direct estimator email, or a public pre-bid attendee list.
Concrete scopes are often split across foundations, slabs, walls, site flatwork, curb and gutter, paving, reinforcing, excavation by others, sawcutting, patching, and testing coordination. Smaller projects may bundle form, place, finish, and reinforcing. Larger civic, school, transportation, and utility projects may separate structural and exterior concrete to compare schedule and crew coverage.
The best response confirms what mix designs, reinforcing, embeds, vapor barriers, subgrade prep, curing, testing, winter protection, and cleanup are included. GCs want a quote that makes weather assumptions, pour sequencing, and exclusions clear enough to level against civil, sitework, and structural drawings.
N°05 — Bid Better
Win more of the right bids
- Search beyond concrete. Include flatwork, foundation, slab, curb and gutter, sidewalk, paving, formwork, rebar, ready-mix, patching, and site concrete terms.
- State weather and seasonal assumptions for hot-weather pours, cold-weather protection, curing, blankets, accelerators, and rain delays when they affect labor or schedule.
- Confirm whether subgrade prep, aggregate base, vapor barrier, reinforcing, embeds, dowels, sawcutting, joint layout, and testing coordination are included.
- Separate Division 03 structural concrete from Division 32 exterior flatwork when the drawings place paving, sidewalks, or curb work in civil sheets.
- Track addenda for slab thickness, reinforcing changes, mix requirements, joint details, finish requirements, and alternate paving sections.
- Get ready-mix, pump, place-and-finish, and reinforcing quotes early enough to confirm availability for the bid date and planned pour sequence.
N°06 — How to Bid
How to Bid Concrete Work on Public Projects
- Step 01
Find concrete bid opportunities
Search public portals, SAM.gov, state DOT sites, city and county procurement pages, school district listings, utility bids, and local plan rooms. Use concrete plus flatwork, slab, foundation, curb and gutter, sidewalk, paving, formwork, rebar, ready-mix, patching, and site concrete terms. Many public scopes appear inside broader civil or facility packages.
- Step 02
Read Division 03 and 32 documents
Review Division 03 concrete and Division 32 exterior improvements along with structural, civil, and landscape sheets. Confirm slab thickness, rebar, dowels, joint layout, finish class, curing, vapor barriers, mix design, testing, sawcutting, subgrade prep, and whether curb, paving, and sidewalks are unit-price or lump-sum items.
- Step 03
Check eligibility and compliance
Confirm registration, insurance, bonding, safety, prevailing-wage, certified-payroll, and subcontractor listing rules before pricing. Some public concrete work requires prequalification, special inspection coordination, traffic control, or DOT material compliance. Make sure crew capacity and ready-mix availability fit the bid date and construction window.
- Step 04
Estimate quantities and production
Build the estimate from drawings, takeoff quantities, unit prices, formwork, reinforcing, ready-mix, pumping, finishing, curing, protection, cleanup, and equipment. Separate structural concrete from site flatwork and paving. State assumptions for weather, winter protection, hot-weather pours, testing, subgrade readiness, access, and pour sequencing.
- Step 05
Submit forms and scope letter cleanly
Follow portal instructions for bid forms, addenda, alternates, unit prices, bonds, certifications, and upload deadlines. For GC bids, send a scope letter that names inclusions, exclusions, specifications used, addenda reviewed, unit-price assumptions, and whether excavation, base, embeds, reinforcing, testing, patching, or restoration are by others.
- Step 06
Review tabulations and awards
Concrete results often reveal whether your quantities, production rate, or scope assumptions were off. Review bid tabs, award notices, and GC leveling questions for missed alternates, unit-price gaps, finish requirements, or rebar scope. Feed those notes back into future concrete takeoffs and bid/no-bid filters.
N°07 — FAQ
Concrete bid questions
Where can concrete subcontractors find public bids?
Concrete subcontractors can find public bids on city, county, state, school district, transportation, utility, park, and federal procurement portals. Search NAICS 238110 with scope words such as concrete, flatwork, foundation, slab, curb and gutter, sidewalk, paving, formwork, rebar, and ready-mix.
How do concrete subcontractors get on GC bid invitation lists?
Start with a concise capability profile, insurance certificates, bonding capacity, service area, safety contact, project-size range, crew capacity, finishing capabilities, and relevant public-project references. Tell estimators whether you pursue structural concrete, flatwork, paving, foundations, or repair work.
Do concrete subcontractors need bonding for public work?
Bonding depends on project size, owner rules, and the GC's subcontract requirements. Concrete subs may be asked for bonding capacity, a consent of surety, or proof that they can support labor, ready-mix, reinforcing, and equipment commitments on larger packages.
What prequalification documents do GCs usually ask concrete subs for?
Common prequalification items include insurance certificates, safety history, EMR or OSHA information, bonding capacity, references, project-size range, financial information for larger packages, equipment list, crew capacity, finish capabilities, and examples of similar structural, flatwork, or paving work.
What project scopes are typical concrete bid opportunities?
Typical scopes include foundations, slabs-on-grade, walls, sidewalks, curb and gutter, paving, equipment pads, ramps, stairs, patching, structural repairs, formwork, reinforcing placement, vapor barriers, sawcutting, curing, and concrete work tied to schools, civic facilities, utilities, parks, and transportation projects.
What NAICS code should concrete contractors use for bid searches?
The core NAICS code is 238110, Poured Concrete Foundation and Structure Contractors. Use the code with text searches because many bid portals do not tag opportunities consistently by NAICS, especially when flatwork, paving, foundations, and site concrete are described separately.
How large are concrete subcontractor bid packages?
Concrete packages can range from small sidewalk and pad repairs to large foundation, slab, wall, paving, and site-concrete scopes. Review drawings, specifications, addenda, bonding requirements, weather conditions, site access, testing requirements, and ready-mix availability before deciding whether the package fits your capacity.
Can Sub-Hub help concrete subs without a credit card?
Yes. Sub-Hub Free has no credit card requirement. Concrete subcontractors can start with bid discovery and upgrade to Sub-Hub Pro when they need full score breakdowns, alerts, saved bids, document access, and AI scope analysis.
How do I bid concrete work with no GC relationships?
Use public portals, SAM.gov, state DOT bid lists, municipal procurement pages, and plan rooms to find owner-posted concrete scopes. Then contact bidding GCs with a capability profile covering flatwork, structural concrete, paving, crew capacity, service area, insurance, and bonding capacity.
Should concrete bids be unit price or lump sum?
Use the project documents. Public civil work often asks for unit prices for curb, sidewalk, paving, or patching quantities, while building concrete may be lump sum. Read the bid form, Division 03, Division 32, drawings, and addenda before deciding how to present pricing.
N°08 — Start With Concrete Bid Matches
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