How to Bid a Parking Lot Paving Job

Start With A Real Measurement

Every number on a paving bid descends from the area. Tonnage, tack coat, labor hours, trucking, striping, they all scale off the square footage of pavement. That makes the measurement the highest-leverage step in the whole bid, and the easiest to get lazy about.

Measure the true paved area, not the gross rectangle. Subtract the islands, the medians, and the building pad. A pace count or a rough guess off a site plan is where under-bids are born, because a 10 percent measurement error is a 10 percent error in material and labor before you have priced a single line. Trace the lot from imagery or field-measure it, but start from a number you can defend.

Convert Area To Material

Once you have the square footage, asphalt tonnage follows from the thickness and the density of the mix. Compacted hot mix weighs roughly 145 pounds per cubic foot, which works out to a handy rule: tons are about the square feet times the compacted thickness in inches times 0.006. A 40,000 square foot lot at a 2 inch surface course is about 40,000 x 2 x 0.006, or roughly 480 tons.

Do not stop at the surface. A bid may include a binder course under the surface, tack coat between lifts, aggregate base repair, and the fuel and trucking to haul it all. The tonnage calculator handles the mix math; your job is to make sure every layer the scope calls for is in the quantity.

Add Labor, Equipment, And Mobilization

Material is only part of the cost. Build the labor and equipment side around the crew and the machines the job actually needs, and do not let mobilization hide.

• Crew and hours. Estimate the crew size and the days on site from the lot area and the scope. Paving, milling, and striping are different crews and different days.
• Equipment. Paver, rollers, milling machine, sweeper, and trucks each carry a cost, whether owned or rented, plus the operator.
• Mobilization. Getting the crew and the iron to the site is a real, mostly fixed cost. On a small lot it can be the largest single line, which is why small jobs cost more per square foot.
• Site costs. Traffic control, disposal or hauling of milled material, manhole and valve adjustments, tack coat, and prep all belong in the bid, not in your margin after the fact.

Set Overhead And Margin

The direct costs, material, labor, equipment, mobilization, are what the job costs you. The bid is that plus the overhead that keeps the business running (office, insurance, licensing, the truck that never bills) and the profit margin that makes the work worth doing. Apply your markup deliberately as a line, not as a fuzzy round-up at the end. A bid that covers direct cost but forgets overhead looks competitive and loses money on every job.

The Traps That Cause Under-Bids

The same handful of misses sink paving bids over and over:

• Skipping the cutouts. Measuring the gross rectangle instead of the true paved area overstates the lot, which feels safe, but the opposite error, an old measurement that missed an expansion, under-bids it.
• Forgetting mobilization on small jobs. A tiny lot priced only on material and square footage ignores the fixed cost of just showing up. Carry a job minimum.
• Guessing the thickness. Two inches versus three is a third more tonnage. Confirm the spec before you price the tons.
• Leaving out prep and disposal. Crack repair, base patching, milling haul-off, and tack coat are easy to picture as included and easy to leave out of the number.
• Rounding the measurement. A number pulled from a pace count or a rough site plan can be off enough to erase the margin. Bid from a measured area.

What A Clean Scope Looks Like

The proposal that wins and protects you is specific. Instead of a lump sum, it lists what is included: the measured area, the mix and thickness of each course, the prep and crack repair, milling and disposal if any, striping and its counts, and the mobilization. A clear scope does two jobs at once. It shows the customer they are comparing apples to apples against the other bids, and it draws the line on what is not included, so the change order for the surprise base failure is a conversation, not a fight. Attach the measurement to the proposal so the number behind the bid is visible.