How to Read and Compare Paving Contractor Estimates

Making Sense of Paving Estimates

You have three estimates for your driveway or parking lot paving project. One is $4,500, another is $7,200, and the third is $9,000. How do you know which is the best value?

The answer is almost never the lowest number. Paving estimates vary because the specifications behind them vary. Learning to read estimates on equal terms is the single most important skill for getting a quality paving job at a fair price.

Anatomy of a Paving Estimate

A complete paving estimate should contain these sections. If any are missing, ask for clarification before comparing.

1. Scope of Work

This section describes what the contractor will do. Look for:

• Demolition and removal: Removing existing pavement and hauling it away
• Excavation depth: How deep they will dig below the existing surface
• Base preparation: What base material, how thick, and how it will be compacted
• Asphalt specifications: Mix type, thickness, number of lifts
• Drainage provisions: Slope, edge treatment, connections
• Cleanup: Site restoration, street sweeping, debris removal

2. Material Specifications

The most critical section. Compare these numbers directly:

| Specification | Budget Bid | Standard Bid | Premium Bid | |---|---|---|---| | Excavation depth | None (overlay) | 6-8 inches | 8-12 inches | | Base material | Existing gravel | 3/4" crushed aggregate | 3/4" crushed aggregate | | Base thickness | 0 inches (existing) | 4-6 inches | 6-8 inches | | Base compaction | Not specified | Plate compactor | Vibratory roller + testing | | Asphalt mix | Not specified | Level 2 (1/2" dense) | Level 2 (1/2" dense) | | Asphalt thickness | 1.5-2 inches | 2-2.5 inches | 2.5-3 inches | | Tack coat | Not mentioned | Included | Included |

3. Exclusions

What is NOT included matters as much as what is. Common exclusions:

• Permits and fees: Some contractors include them, others do not
• Utility adjustments: Raising manholes, valve boxes, or cleanouts to the new surface level
• Soft spot repair: Over-excavation and replacement of unstable subgrade
• Drainage improvements: French drains or regrading beyond the pavement area
• Striping and marking: For parking lots
• Landscape restoration: Repairing disturbed lawn or landscaping at pavement edges

4. Timeline

• Start date and estimated completion
• Number of working days
• Curing time before you can drive on the surface
• Weather contingency policy

5. Payment Terms

• Deposit amount (should be 10-20%, never more than 30%)
• Progress payment milestones
• Final payment terms
• Accepted payment methods

6. Warranty

• Duration (1-5 years typical)
• What is covered
• What is excluded
• Process for filing a claim

How to Compare Estimates on Equal Terms

Step 1: Normalize the Scope

Before comparing prices, ensure each estimate covers the same work:

• Same demolition and removal scope
• Same excavation depth
• Same base material and thickness
• Same asphalt type and thickness
• Same drainage provisions

If one estimate includes items the others exclude, add the cost of those items to the cheaper bids for a true comparison.

Step 2: Calculate Price Per Square Foot

Divide the total price by the paved area to get a per-square-foot cost:

| Metric | Budget Range | Standard Range | Premium Range | |---|---|---|---| | Residential driveway (per SF) | $3 - $5 | $5 - $8 | $8 - $12 | | Commercial lot (per SF) | $2.50 - $4 | $4 - $7 | $7 - $10 |

For Oregon-specific pricing, see our asphalt paving cost guide.

Step 3: Evaluate Base Preparation

Base preparation should represent 30-40% of the total estimate for a new installation. If a bid is significantly cheaper, check whether the base specification is adequate:

• Minimum residential: 4 inches of compacted aggregate over stable subgrade
• Recommended residential: 6 inches of compacted aggregate
• Commercial/heavy traffic: 8-12 inches of compacted aggregate

A contractor who specifies no base preparation or minimal base is not saving you money. They are selling you a pavement that will fail early, requiring resurfacing or replacement sooner.

Step 4: Check Asphalt Thickness

The difference between 2 and 3 inches of asphalt is the difference between a 10-year and a 20-year surface:

• 2 inches: Minimum for light residential traffic. Adequate for low-traffic driveways with excellent base
• 2.5 inches: Recommended for standard residential driveways
• 3 inches: Best for driveways with heavy vehicles, RVs, or above-average traffic
• 3-4 inches: Required for commercial applications

Step 5: Compare Warranties

A 3-year warranty from a contractor who has been in business for 15 years is worth more than a 5-year warranty from a company that started last year. Evaluate:

• Contractor longevity: Will they be around to honor the warranty?
• Coverage scope: What specific defects are covered?
• Exclusions: Are the exclusions reasonable?
• Claim process: Is it clearly defined?

Red Flags in Paving Estimates

Suspiciously Low Prices

If one bid is more than 25-30% below the others, investigate why. Common reasons:

• Thinner asphalt (1.5 inches instead of 2.5)
• No base preparation (paving directly over existing surface)
• Inferior materials (cold mix instead of hot mix)
• No cleanup or restoration included
• Unlicensed or uninsured contractor

Vague Specifications

Avoid estimates that say:

• "Pave driveway" without specifying dimensions, materials, or thickness
• "Prepare base" without specifying depth, material, or compaction method
• "Asphalt" without specifying mix type or thickness
• "Standard industry practice" without defining what that means

Pressure Tactics

Walk away from contractors who:

• Claim the price is only good "today"
• Happen to have "extra material" from a nearby job
• Refuse to provide a written estimate
• Demand large upfront payments
• Want cash only

Missing Information

A complete estimate should always include:

• CCB license number
• Insurance verification
• Material specifications
• Written warranty terms
• Payment schedule

Sample Estimate Comparison

Here is what comparing three real estimates might look like for a 600-square-foot residential driveway:

| Item | Contractor A ($4,200) | Contractor B ($6,800) | Contractor C ($8,500) | |---|---|---|---| | Remove existing | Overlay existing | Full removal + haul | Full removal + haul | | Excavation | None | 8 inches | 10 inches | | Base material | Existing | 6" crushed aggregate | 8" crushed aggregate | | Compaction | Not specified | Plate compactor | Roller + testing | | Asphalt | 2" (type unspecified) | 2.5" Level 2 | 3" Level 2 | | Drainage | Not addressed | 2% slope to street | 2% slope + edge drain | | Warranty | 1 year | 2 years | 3 years | | Per square foot | $7.00 | $11.33 | $14.17 |

In this example, Contractor A is paving over the existing surface with thin asphalt and no base work. It will look good initially but likely fail within 5-7 years. Contractor B provides a solid specification at a fair price. Contractor C delivers a premium installation that will last the longest but at a significant price premium.

For most residential projects, Contractor B represents the best value.

Get a Transparent Estimate from Cojo

Cojo provides detailed, line-item estimates with clear material specifications, defined scope, and written warranties. We explain every line item so you understand exactly what you are paying for.

Request your free estimate or read about what to expect during your paving project. Learn more about hiring a paving contractor.