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The Cost of Parking

In the wake of a new report that found 640,000 more spots than residents, Philly 3.0’s engagement director calls for real changes to how we manage parking in Philly

The Cost of Parking

In the wake of a new report that found 640,000 more spots than residents, Philly 3.0’s engagement director calls for real changes to how we manage parking in Philly

A big new study from data scientist Eric Scharnhorst for the Research Institute for Housing America measures the parking supply in five large U.S. cities and finds that Philadelphia is actually flush with parking, with a parking density about 3.7 times greater than the density of homes.

According to Scharnhorst’s analysis, Philadelphia has about 2.2 million parking spaces for just 1.56 million people, two-thirds of which is off-street parking. That includes single-use parking lots, driveways, and ancilliary parking for other uses. The spaces are fairly evenly distributed throughout the city.

(Household density vs. parking density | Image: Research Institute for Housing America)

So not only does parking take up a ton of land, but for every car in the city, there appears to be a multiplier on the amount of land that gets devoted to storing cars.

(Housing unit density vs. parking density | Image: Research Institute for Housing America)

Scharnhorst demonstrates how expensive this all is by estimating the replacement value of all these parking spaces, along with the distribution of land values in Philadelphia. Taken together, you get a sense of the opportunity cost of allocating so much space to idle vehicles, particularly on expensive downtown land.

Philadelphia’s 2.2 million parking spaces have an estimated replacement cost of over $17 billion. This equates to about 3.7 parking stalls per household with a total per-household share of the cost of just under $30,000. Seventy percent of Philadelphia’s estimated parking replacement cost sits in structured parking, even though this type of parking represents only 11 percent of the parking supply in Philadelphia […]

Researchers claim that structured parking spaces can cost $60,000 or more, each, to build. This matches closely with the low end of per-stall costs in Philadelphia, Seattle, and Jackson (Beekman; Shoup)…Figure 9 shows structured parking density increases as land prices increase. Surface parking in Philadelphia remains high, even in areas with the most expensive land.

Philadelphia’s abundant off-street surface parking, even in the most expensive areas, is an opportunity for developers to transform parking lots into other uses in convenient locations.“‘

(Surface parking coverage in central Philadelphia | Image: Research Institute for Housing America )

In parts of the city with high land values, every surface parking lot presents an opportunity cost to the city’s economy in foregone jobs, revenues, and residents, since almost anything else creates more economic value and generates more tax revenues on a per-acre basis than storing vehicles.

We might decide this cost is worth paying to some extent, but the point is that public policy at the very least shouldn’t put a thumb on the scale in favor of building more parking than what renters and home-buyers want to pay for, particularly when occupancy rates are declining, and some noteworthy parking garages under-occupied.

Twenty-five years of parking studies in the City Center of Philadelphia show that public parking occupancy rates have been declining since 2005, despite infill development reducing the overall amount of parking in the area. A 110 space parking lot that was converted to a 540-space above-ground public parking garage with ground floor retail recorded just 56 percent parking occupancy in 2015, or 302 empty parking spaces (Philadelphia City Planning Commission).

What does this mean for public policy? As Caitlin McCabe’s philly.com piece explains, there’s much more that could be done to actively manage curb parking in the city, or to discourage surface parking as a land use. The failure to manage curb parking is at the root of the issue, and the resulting problems end up driving a lot of other bad policies designed to cope with them. So the first step is for some enterprising Councilmembers to start putting together a parking permit bill with a package of changes to price permits correctly, limit the number, finally create an employee parking permit, and generally make the system more comprehensive and less ad hoc.

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The City also needs to inventory all of our policies that still inappropriately privilege parking uses and come up with an exit strategy. The first step is to stop digging, and withdraw Bill 160710, currently stuck in the Rules Committee. That bill, which is supported by Council President Darrell Clarke and 3rd District Councilmember Jannie Blackwell, proposes doubling the minimum parking requirements in the zoning code for residential construction—a move that would super-charge how much extra space we’re wasting on parking, and drive up the cost of housing by anywhere from $150-400 a month. McCabe cites one UCLA study in her piece that found “free” parking adds an extra 17 percent to the cost of an apartment.

The Office of Property Assessments should also consider discontinuing their current land assessment methodology, which has the effect of under-assessing vacant and underused land, and essentially underwriting speculation—perhaps one reason why the study finds lots of surface lots still exist downtown even as Center City land values are higher than they’ve ever been in recent history. Shifting the balance of property tax rates from buildings more toward land would also tend to help accelerate the redevelopment of dead space.

Public policy shouldn’t put a thumb on the scale in favor of building more parking than what renters and home-buyers want to pay for, particularly when occupancy rates are declining, and some noteworthy parking garages under-occupied.

City Councilmembers should also reconsider the public sector’s contributions to the parking surplus: the dozens of municipal parking lots all across the city—and who knows how many city employee lots—many of which would make a much greater contribution to the city or neighborhood economy if redeveloped into housing or commercial space instead of parking.

The point isn’t that all of this parking is undesirable or that we should be trying to reduce it to zero—it’s that devoting so much space to storing cars has a large cost, both in actual dollar terms and in opportunities to do something more productive with that space, and elected officials should start taking those costs seriously.

Jon Geeting is the director of engagement at Philadelphia 3.0, a political action committee that supports efforts to reform and modernize City Hall. This is part of a series of articles running in both The Citizen and 3.0’s blog.

Photo: Paul Sableman via Flickr

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