Parking Spaces
80
Guest Cars
69
Staff
7
Lot Size
0.33 ac
Total Parking Spaces
80
14,400 sq ft (0.33 acres)
Guest
69
Staff
7
ADA
4
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Inputs
Result
150 / 2.2 = 68.2 → 69 guest cars. Staff: ceil(69 × 0.10) = 7. ADA: ceil(76 × 0.05) = 4. Total: 69 + 7 + 4 = 80. Lot: 80 × 180 = 14,400 sq ft = 0.33 acres.
Inputs
Result
200 / 2.2 = 91. Shuttle -20%: 73 guest cars. Staff: 8. ADA: 4. Total: 85. Valet: 85 × 120 = 10,200 sq ft = 0.23 acres.
With the average carpool rate of 2.2 guests per car, 150 guests need 68 guest cars plus 7 staff cars plus 4 ADA spaces = 79 total spaces. Valet service reduces space by 33% (53 spaces). A shuttle service from an off-site lot reduces guest cars by 20% (63 total spaces).
| Guests | Self-Park | Valet | With Shuttle |
|---|---|---|---|
| 75 | 40 spaces | 27 spaces | 33 spaces |
| 150 | 79 spaces | 53 spaces | 64 spaces |
| 250 | 131 spaces | 88 spaces | 106 spaces |
| 400 | 210 spaces | 140 spaces | 169 spaces |
A standard self-park space needs 180 sq ft (9×20 ft including drive aisle share). Valet parking needs only 120 sq ft because cars are stacked without drive aisles. Parallel street parking needs 200 sq ft per space. For 79 spaces: 14,220 sq ft (self) or 9,480 sq ft (valet).
The ADA requires a minimum percentage based on total lot size: 1 space for 1–25 total, 2 for 26–50, 3 for 51–75, and about 5% for larger lots. For a 79-space event lot, plan 4 ADA spaces with at least 1 van-accessible space (8 ft wide with 8 ft access aisle).
Yes, valet parking saves about 33% of lot space. Standard self-park needs 180 sq ft per space (including drive aisles). Valet attendants stack cars in tandem rows without drive aisles, reducing to 120 sq ft per space. For 100 cars: 18,000 sq ft (self) vs 12,000 sq ft (valet) — saving 6,000 sq ft.
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Last Updated: Mar 20, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.