Parking Lot Cost Calculator: Cost to Build Per Space

With the defaults, a 50-space lot at 300 sq ft per space comes to $122,863, which is $2,457 per space and $8.19 per sq ft. That is 4 in of asphalt over 8 in of aggregate on a lightly vegetated site, with barrier curb around the estimated perimeter and the spoil left on site. Asphalt is $45,313, aggregate base $23,625 and curb $20,580, which together are $89,518, or 73% of the total. Excavation is $13,889, fine grading $5,250, clearing $2,583, silt fence $1,715, striping $1,370, accessible signs $500 and mobilization $8,038.

Per space and per square foot answer different questions. The cost per space moves with the area you allow each space: at the default prices the same 50 spaces are $2,092 per space at 250 sq ft, $2,819 at 350 sq ft and $3,889 at 500 sq ft, while the cost per sq ft stays between $7.78 and $8.37. The Victoria Transport Policy Institute’s Parking Costs chapter (October 2022) says off-street parking typically requires 250 to 350 sq ft per space, including access lanes and landscaping, and that a survey of six typical lots averaged 85 spaces per acre, which works out to about 512 sq ft per space. So try a higher area per space if the lot has islands or an awkward shape.

A price per square foot for paving alone reads lower than this total, because it covers less. At the defaults the asphalt line alone is $3.02 per sq ft, and asphalt plus aggregate base is $4.60 per sq ft, against $8.19 for the whole job with site work, curb, striping and mobilization.

Lot size changes the cost per space, because curb and silt fence follow the perimeter while the paving follows the area. With the other defaults unchanged, 20 spaces come to $55,043 ($2,752 per space), 100 spaces to $231,278 ($2,313) and 200 spaces to $441,674 ($2,208). The $5,000 minimum is a floor that sets the price only when the job adds up to less: a one-space gravel job on a cleared site with no curb has lines that add up to $1,782, so the minimum sets the price at $5,000, and with every quantity at zero the total is also $5,000. Mobilization is a charge, 7% of the lines.

This is a bare-site estimate. It does not include lighting, landscaping, sidewalks, gates, street frontage work, stormwater detention, utilities, permits or design fees, and on a real public lot those can cost more than the pavement. Budget them separately before you compare this figure with a finished project.

The City of Sequim, Washington shows the size of the gap. Its W Spruce St Parking Lot bid tabulation (CFL-110NC, bids opened February 12, 2025) was for a new lot that the Sequim Gazette (March 5, 2025) reported as 40 spots, 4 of them pay-to-use EV spots, gated. The low bid, from Hoch Construction, was $618,901.46, lowest of 10, which is $15,473 per space. That whole-bid figure includes electrical, lighting, gates and EV chargers, with 8.9% sales tax on Schedules B and C. Without Schedule B, which holds the electrical, lighting, gate and charger items, the three lowest bids work out to $9,344 to $10,991 per space. Neither figure is the same scope as the calculator’s bare-site $2,457.

The other bids ran up to $813,573.90. One more total on the tab, $4,994,728.69, is not a real price for the job: a $21,000 unit price on a 200 SY asphalt removal item was extended to $4.2 million, and the tab marks it as a bid proposal error corrected in accordance with Section 1-03.1. It should not be read as the top of a range.

Sequim also shows that a real lot can use more of everything per space. The tab has no lot area, and the only area in it is the 0.44 acre of clearing, which is 479 sq ft per space. Its four curb items add up to 1,015 LF, which is 25 LF per space against 10 LF per space in the calculator’s default. The tab’s direct lot items (clearing, curb, base, ballast, asphalt, paint, drain pipe and catch basins, no mobilization) come to $193,878 to $286,500 across the ten bids, a median of $242,181. The calculator’s unit prices on those same quantities come to $150,788, which is 78% of the lowest and 62% of the median. Part of that gap is asphalt, which Sequim’s bidders priced at $156 to $202 per ton, and part is clearing, which was $11,000 to $44,000 for the item against $3,300 here.

The default section is an estimate. No public source we opened gives a default section for a parking lot, and the Colorado Asphalt Pavement Association’s Parking Lot Design Guide (2nd edition, December 2016) recommends “that the thickness of the asphalt pavement section for parking lots be designed by a qualified and licensed Professional Engineer.” That guide gives 4 in as the minimum thickness of untreated aggregate base course for Class 6 (3/4 in) material. It also says that if a small, low-traffic lot gets a weekly or bi-weekly trash truck, it would be more economical to build the entire lot to handle the truck traffic. So get a design before you commit to a depth. The depths change the price: 3 in over 6 in comes to $100,706 ($2,014 per space), 5 in over 8 in to $136,222 ($2,724) and 6 in over 12 in to $167,175 ($3,344).

A gravel surface at the default 4 in comes to $89,885, which is $1,798 per space and $5.99 per sq ft. It swaps the $45,313 asphalt line for $15,863 of gravel and drops the $1,370 striping line, because paint needs a paved surface. Taking the curb off as well brings it to $67,865 ($1,357 per space, $4.52 per sq ft). The $47 per ton gravel price comes from the private road paving calculator and was not researched separately for parking lots. The U.S. Access Board’s guide says accessible parking is required in unpaved lots too: “including gravel or grass lots, parking spaces and access aisles must be marked and have firm, stable, and slip resistant surfaces”. The calculator keeps the accessible signs on gravel, but it does not price marking those spaces or a firmer surface for them.

Drainage is off by default. Adding 2 catch basins and 100 LF of 12 in storm pipe adds $15,000 of lines, and with mobilization the default job comes to $138,913, which is $2,778 per space and $9.26 per sq ft. The same drainage on the gravel lot comes to $105,935 ($2,119 per space, $7.06 per sq ft). Adding geotextile to the asphalt job with drainage brings it to $145,154 ($2,903 per space). This is an allowance for moving water off the lot, not a drainage design, and it does not include stormwater detention.

Earthwork is the weakest line. The $25 per CY is an estimate between Tennessee DOT’s 2025 statewide average of $18.84 and its Region 1 price of $30.65, which are large-job prices. The only small-job evidence we found is lump sums. On a level site that keeps its spoil it is $13,889 of the default, but hauling all 555.6 CY off-site at the estimated $45 per CY brings the default to $149,613, and a sloped site needs extra cut. If the site is not level, get a grading quote.

Asphalt is $125 per ton on this page, and the parking lot resurfacing and private road paving calculators use $105. The difference is deliberate: this is a small new lot priced from small-lot bids. The City of McHenry, Illinois tabulated eight bids on July 18, 2024 for its Main Street Parking Lot Reconstruction Project, a reconstruction with no stall count. The 130 tons of binder course were bid at $100 to $145, median $119, and the 160 tons of surface course at $120 to $155, median $128.88, which blends to $124.45 per ton. Tennessee DOT’s 2025 statewide averages run from $119.08 to $136.04 across three asphalt items. At $105 per ton the default job would be $115,105.

Aggregate base is $35 per ton, from Tennessee DOT’s 2025 average of $35.22 over 1,169,536 tons, and the private road and concrete lot calculators use $32. A state DOT price is one state’s price for highway lettings, and the spread inside one state is wide: that item ran from $29.34 to $53.47 per ton by region, which moves the default job from $118,775 to $136,202. Enter your local prices in the pricing section.

The closest bid comparison we found is the bid tab titled “Collection Systems Operations Facility Parking Lot, Capital Project No. 2217”, published at fourrivers.illinois.gov. It prints no date, and its file path shows 2023/08. It lists two bidders and no stall count. It gives three lines at the tab’s quantities plus its lump-sum earthwork. On the three measured lines (2,294 SY of 12 in aggregate, 646 tons of asphalt and 1,101 LF of curb and gutter), the calculator is $175,768 against $135,054 for the low bid and $144,716 for the second bid, which is 130% and 121%. Aggregate is $48,776 against $34,410 and $36,704, asphalt $80,750 against $67,614 and $72,780, and curb $46,242 against $33,030 and $35,232. The earthwork item is a lump sum with no stated quantity, $85,552 and $61,825, and the job also has 3,229 SY of topsoil and seeding, so it may cover more ground than the paved area. The calculator’s $34,308 for excavating a 17 in box under the paved area, a depth we derived from the tab’s tons, plus fine grading, is not a like-for-like price for that item, so we do not add the four lines into a total. That is one project with two bidders, so it does not validate any single unit price. It also leaves out mobilization, which that tab has no line for.

Treat these as reference points, not as our prices. They are public jobs in Illinois, Washington and Tennessee, and no private-job price was found. A private rural lot may differ in either direction.