Gravel Base Contractor Quote Checklist
Compare gravel base contractor quotes by excavation, depth, aggregate type, geotextile, compaction, drainage, access, cleanup, and exclusions.
A gravel base contractor quote should define excavation, base depth, aggregate type, delivery, geotextile if needed, compaction, drainage, grading, access, cleanup, warranty, and exclusions before concrete is placed.
Use this checklist before comparing slab, driveway, patio, garage floor, or shed base bids in the Concrete Quote Reviewer. Contractors can convert the accepted base scope into a client estimate with the Concrete Proposal Kit.
Competitor pages such as ConcreteCalculatorMax's gravel calculator and ConcreteCalculator.pro's concrete aggregate calculator cover material quantity. The quote gap is base prep: excavation, compaction, drainage, geotextile, and proof that the base is ready for concrete.
Quick answer
Compare gravel base contractor quotes with this structure:
gravel base quote =
excavation, subgrade repair, aggregate type, base depth, delivery
+ geotextile, grading, compaction, drainage, cleanup, and exclusions
Base prep affects settlement, drainage, and durability. Confirm soil, drainage, compaction, thickness, and local requirements with qualified local professionals.
Gravel base quote inputs
| Input | Why it matters | What to ask |
|---|---|---|
| Base depth | Depth changes tons, delivery, and labor. | What compacted depth is included? |
| Aggregate type | Crushed stone, gravel, and recycled base behave differently. | What material is specified? |
| Excavation | Over-dig and spoil handling can change price. | What excavation and haul-off are included? |
| Geotextile | Fabric may be needed over weak soil. | Is fabric included or excluded? |
| Compaction | Loose base is not the same as compacted base. | What compaction method is included? |
| Drainage | Water under slabs can create failures. | How is drainage handled? |
| Access | Tight sites slow delivery and spreading. | Can trucks dump near the work area? |
| Cleanup | Extra gravel and spoil need removal. | Is cleanup included? |
For quantity, use the Gravel Base Calculator for Concrete. For slab cost, review Concrete Slab Cost per Square Foot.
Gravel base quote worksheet
| Quote line | Bid A | Bid B | Notes |
|---|---|---|---|
| Work area | Slab, patio, driveway, garage, shed base. | ||
| Excavation | Depth, spoil, roots, old base, haul-off. | ||
| Aggregate type | Stone size, recycled, clean, dense grade. | ||
| Compacted depth | Installed and compacted, not loose depth. | ||
| Geotextile | Included, excluded, or allowance. | ||
| Compaction method | Plate compactor, roller, lifts, proofing. | ||
| Drainage and slope | Grade, outlet, soft spots, water control. | ||
| Cleanup and warranty | Leftover material, yard repair, exclusions. |
Red flags in gravel base quotes
| Red flag | Follow-up question |
|---|---|
| "Base included" only | What material, depth, and compaction are included? |
| Loose depth quoted | Is the depth compacted depth or dumped loose depth? |
| No subgrade note | What happens if soft soil, roots, or water are found? |
| No compaction method | How is the base compacted and checked? |
| Drainage ignored | Where does water go under or around the slab? |
| Cleanup excluded | Who removes extra gravel, spoil, and debris? |
FAQ
What should a gravel base quote include?
It should include excavation, aggregate type, compacted depth, delivery, geotextile if needed, grading, compaction method, drainage, cleanup, warranty, and exclusions.
Is compacted depth different from loose depth?
Yes. Loose gravel settles during compaction. Ask whether the quoted depth is the final compacted base depth.
Should geotextile fabric be included?
Sometimes. Fabric depends on soil, drainage, and project requirements. The quote should state whether it is included, excluded, or optional.
Why do gravel base bids vary?
They may assume different excavation depths, aggregate types, compaction methods, access, drainage fixes, and cleanup.
Is this soil or engineering advice?
No. Confirm soil, drainage, base design, compaction, and local requirements with qualified local professionals.
Next step
Enter each base scope into the Concrete Quote Reviewer. Compare concrete price only after excavation, aggregate, compaction, and drainage are aligned.
Quote planning next step
Turn this guide into a concrete buying check
Run the matching calculator, then compare ready-mix, bagged concrete, delivery fees, access needs, and quote gaps before you buy materials or approve a contractor number.