The 15-Minute Base: Bringing Walkable-City Thinking to Military Installations

A compact, walkable military installation town center — the 15-minute base concept.

Field notes

I’m Nathaniel Pyron, a military urban planner specializing in military master planning with an airport and airfield focus. Most of my work comes down to one question: how does the layout of a place shape the lives of the people who depend on it? Lately, I’ve been applying a civilian planning idea — the 15-minute city — to a question the military has been wrestling with for years: why do so many of our installations feel less like communities and more like office parks you happen to sleep on?

The 15-minute city, briefly

The concept was formalized in 2016 by urbanist Carlos Moreno, and its premise is disarmingly simple: everything a person needs day to day — home, work, food, health care, school, a place to gather — should be reachable within 15 minutes on foot or by bike. It rests on four principles: proximity, diversity of uses, density, and digital services that reduce unnecessary trips. Paris made it famous. But the military, in a way, got there first — and then paved over it.

Bases were the original 15-minute towns

Older military installations were compact by necessity. Housing sat near the workplace, the commissary and clinic were a short walk away, and the whole post functioned as a self-contained town. Then the automobile era arrived, and bases sprawled like everything else: one-story buildings set far apart, single-use districts, and a road network that assumes everyone drives everywhere.

The Department of Defense noticed. Its Unified Facilities Criteria for Installation Master Planning were overhauled to make compact, walkable, mixed-use development — complete with town centers — the standard for hundreds of installations in the U.S. and abroad. As one of the officials who led that overhaul put it, the old pattern was “a lot of one-story buildings, a lot of sprawl, buildings with a lot of space in between.” The fix he described sounds like a 15-minute city pitch: build taller, bring buildings closer together, and you need fewer roads and fewer vehicles.

Congress noticed too. Amendments to the National Defense Authorization Act pushed bases toward compact infill development, growth boundaries, and expanded transit — with Hawaii’s own Senator Brian Schatz arguing that “smart, sustainable development can help the Department of Defense achieve long-term cost-savings while promoting military readiness.”

Where the idea pays off on base

Apply Moreno’s four principles to an installation and the fit is natural:

Proximity. Cluster barracks and family housing near work centers, dining, the commissary, the clinic, and childcare. A service member who can walk to formation, the gym, and dinner in one trip has hours of their week back.

Diversity. Mix uses instead of segregating them. Town centers that combine retail, services, and gathering space give a base a heart — and give families a reason to stay on base rather than scatter thirty minutes out.

Density. Build up, not out. Denser development shortens every trip, shrinks the infrastructure bill (fewer lane-miles to pave and maintain), and leaves more land for training areas, open space, and the mission itself.

Digitalization. The services that don’t need a physical trip — appointments, orders, admin — should be handled online, so the trips that remain are the ones worth walking for.

The payoff isn’t abstract. The Pentagon’s 2014 Healthy Base Initiative tested exactly this kind of thinking at 14 installations, on the premise that layouts built for cars were discouraging walking, biking, and exercise. And there’s a retention argument hiding inside the planning one: as former Air Force planner Mark Gillem observed, when families live scattered far from base, installations lose the “esprit de corps” that used to define them. Livability is a readiness issue.

Where it gets complicated

A base is not a civilian neighborhood, and the 15-minute model has to bend around hard constraints. Security perimeters, antiterrorism standoff distances, and airfield clear zones and noise contours all limit where mixed-use density can go — you can’t put a town center inside a runway protection zone. Mission operations can’t be relocated for convenience, and land-use compatibility near airfields is non-negotiable.

That’s not a reason to abandon the idea; it’s the planner’s actual job. Nathaniel Pyron’s rule of thumb: if a service member has to drive to get coffee, the plan isn’t done yet — but if the coffee shop sits inside an explosives safety arc, the plan was never real. The 15-minute base is a goal to plan toward within the fence line’s real constraints, not a template stamped onto every installation.

The principle

The 15-minute city asks civilian planners to measure a neighborhood by what a person can reach on foot. Military planners should ask the same of their installations — because a base where daily life fits inside a walk is cheaper to run, healthier to live on, and stronger as a community. The fence line doesn’t exempt us from good urbanism. If anything, it gives us a head start: we plan the whole town.

About the author

Nathaniel Pyron is a military urban planner specializing in military master planning with an airport and airfield focus, based in Honolulu, Hawaii. He has served with the United States Marine Corps for the last 3 years as a community planner, based at Camp Blaz and Darwin, Australia, and studied urban planning at Arizona State University, School of Urban Planning. His LinkedIn title is “Urban Planner (Land Use & Airspace)”.