This is an op/ed submitted by Terry Maynard, co-chair of the Reston 20/20 committee. It does not reflect the opinions of Reston Now.

Our County Board of Supervisors, led by Chairman Sharon Bulova, is in the process of overbuilding and underserving residents in Reston and across the county. The result will be the eroding livability of Reston and other county areas facing urbanization.  

And this is being accomplished by a simple arithmetical trick: Overstating the amount of space new housing and office space require to accommodate residents and workers. Very simply, county planners continue to overstate the space needed for office workers as 300 gross square feet (GSF) per worker when studies globally over nearly a decade show it is now under 200 GSF/worker and could be headed to 150 GSF/worker.  

At the same time, as it started to plan for Tysons’ redevelopment nearly a decade ago, the County raised its planning assumption for the size of station area dwelling units (DUs) from 1,000 GSF/DU to 1,200 GSF/DU. Nonetheless, a County planning study for Tysons showed then (2007) that the average size of Tysons residents was 1,100 GSF, mostly in garden apartments before the recent advent of massive high-rise residential development there. Now, the average high-rise DU size is shrinking well below 1,000 GSF/DU, more than offsetting the few mid-rise and single-family attached DUs in station areas, as some recent Reston development proposals show:

• JBG/Wiehle and partners plan for 1,300-1,500 residential units in 1.2 million GSF of development in two 5-story buildings, or 800-925 GSF/DU;
• Golf Course Plaza proposes 413 DUs in a 392,600 GSF multi-family building or 950 GSF/DU, also in 5-story structures;
• Faraday’s proposes redeveloping the area just south of Wiehle Station with up to 500 apartments in two buildings with about 487,000 GSF of residential space that will reach about 975 GSF/DU according to its plan submission.
• Lerner Enterprises is planning a 457-“luxury apartment” complex called Excelsior Park with average unit size at about 1,050 GSF in 423,587 rentable square feet (RBA), which equates to 481,350 GSF.

That’s nearly 3,000 DUs, including luxury apartments, whose average GSF is about 925 GSF/DU — nowhere near the County’s assumed size of 1,200 GSF/DU — and suggesting the number of future residents and DUs in Reston’s station areas will be nearly one-third greater than planned under existing allowable densities. This is consistent with national data: A study of apartment sizes over the last decade shows that their average size has shrunk — not expanded — from 1,015 square feet to 934 square feet.  

The impact is straightforward: The resulting planned densities (total GSF of development divided by the square footage of the lot on which it sits) will allow half-again as many office workers and 28 percent more residential units than the County plan officially intends. Yet developers and the County are only planning to provide services — improved roads, schools and parks, and more — based on the lower count envisioned in the plan. The result will be reduced services and higher taxes.

So what does that mean for “real people?” Based on GSF information provided by FCDOT to the Supervisors serving as the Board Transportation Committee, the current Reston station area plan offers the potential for 76,280 added residents (at 2.0 residents/DU) and 29,059 added office worker jobs (at 300GSF/worker) in the next four decades.  

If instead of using the County’s faulty planning assumptions, we use real world experience, we can anticipate that the allowable development could result in an addition of 101,492 total residents in 50,746 DUs and 78,559 office workers, including retrofitted office buildings, market conditions permitting.  More specifically, it suggests an order of magnitude explosion in residents (11,720 in 2010 vs. 113,212 then) and more than twice as many office employees (69,941 in 2010 vs. 148,500 then) in Reston’s station areas. Overall, Reston can expect twice as many people living and working in the station areas as is anticipated by the Reston plan.

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