Parking Ratio Calculator

Parking ratio (stalls per 1,000 SF of building) is one of the most underweighted leasing variables. Below-market parking discounts rent and shrinks the tenant pool; abundant parking suppresses walkability and ground-floor retail value. This calculator computes the ratio, the surplus or deficit versus market norms, and the annual parking revenue at the configured occupancy and rate.

Building SF

Parking stalls

Market parking ratio

Stalls per 1,000 SF

Monthly rate / stall

Stall occupancy %

Parking ratio (stalls / 1K SF)

3.53

Surplus / deficit vs market

-35

Annual parking revenue

$405,450

How the math works

Parking ratio = stalls per 1,000 SF of building. Suburban office targets 4.0/1K; urban offices manage with 1.0-2.5/1K plus transit; medical office wants 5.0-6.0/1K; retail shopping centers 4.5-5.5/1K.

Below-market parking ratios deflate rent — tenants discount their offer or refuse to lease. In transit-oriented markets, abundant parking can also depress walkability and ground-floor retail value.

How to Use

Enter building SF and total parking stalls.
Enter the market parking ratio target (4.0/1K typical suburban office).
Enter monthly rate and stall occupancy.
Read parking ratio, surplus/deficit, and annual revenue.

Frequently Asked Questions

Typical ratios by use?

Office 3.5-4.5/1K (urban) or 4-5/1K (suburban); medical 5-6/1K; retail 4.5-5.5/1K; restaurants 10-20/1K of dining; warehouse 1-2/1K.

Can parking be ancillary income?

Yes — many urban office and mixed-use buildings monetize parking $50-300/stall/month. Some assets generate 10-20% of NOI from parking.

Do leases include parking?

Office leases typically include 'X stalls per 1,000 SF leased' as bundled — additional stalls cost extra. Retail centers usually share parking common.