The Knowledge
Why Phoenix’s Skyline Has Stayed Low — And How It Compares to Los Angeles
Discover why Phoenix’s skyline lacks supertall skyscrapers, from FAA flight path limits near Phoenix Sky Harbor International Airport to how it compares with Los Angeles’s skyline growth.
Last Updated on March 25, 2026 by Daily News Staff
Phoenix is the fifth-largest city in the United States, yet its skyline doesn’t resemble other major metros like Los Angeles, Chicago, or Dallas. Despite rapid population and economic growth, downtown Phoenix has long lacked supertall skyscrapers — and until recently, didn’t even have a building tall enough to qualify as a true “skyscraper” under standard definitions.
The Basics: Phoenix’s Height Reality
The tallest structure in Phoenix for decades has been Chase Tower, rising to about 483 feet. Under the Council on Tall Buildings and Urban Habitat definition, a skyscraper reaches at least 492 feet — which means Phoenix has technically lacked one — despite its size and population.
A new project, the Astra Tower, is planned to rise around 540+ feet when it breaks ground, potentially giving Phoenix its first true skyscraper.
Airport Proximity: The FAA’s Height Grid
FAA Obstacle Evaluation & Downtown Limits
Phoenix’s skyline constraints are rooted in aviation safety.
📍 Phoenix Sky Harbor International Airport sits just a few miles from downtown.
- The Federal Aviation Administration (FAA) regulates building heights near airports so they don’t obstruct flight paths, require planes to alter approaches, or interfere with climb-out safety.
- In Phoenix, this results in a layered set of height limits that vary by location and elevation above sea level — often measured in feet above mean sea level (MSL) rather than simply building height from ground.
The city’s zoning code divides downtown into multiple contour zones with distinct maximum elevation values (e.g., 1,275 ft, 1,525 ft, 1,700 ft MSL), each tied to how close it sits under airport flight paths.
That means in some blocks you can’t build above a specific elevation even if ground levels are lower — a regulatory “roof” that varies across downtown.
City zoning also explicitly states that no building can exceed the FAA’s airport height limits, even if other bonuses or zoning allowances exist.
Phoenix vs. Los Angeles: A Quick Comparison
Los Angeles: Higher Limits, Different Constraints
Cities like Los Angeles also have nearby airports (e.g., Los Angeles International Airport), but their key business districts aren’t directly under major flight corridors.
LA’s downtown has:
- Taller office and residential towers
- A financial core with dense development
- Fewer FAA-driven overlays because the flight paths stretch past the downtown edge
Los Angeles’s tallest buildings — including Wilshire Grand Center (~1,100 ft) and U.S. Bank Tower (~1,018 ft) — were built where FAA restrictions don’t force low ceilings. FAA evaluations were conducted but didn’t cut as deeply into downtown zoning compared to Phoenix.
Phoenix, by contrast, sits right under approach and departure corridors — leading to consistent FAA involvement in almost every proposed mid- or high-rise downtown.
Economic and Planning Philosophies
Beyond FAA rules:
- Phoenix developed in the automobile era, with vast inexpensive land encouraging horizontal growth.
- Los Angeles grew earlier with heavier investment in centralized neighborhoods and higher density.
- Phoenix’s village plan long encouraged multiple smaller hubs instead of concentrating all growth in one downtown core.
These historical differences mean Phoenix didn’t have the same economic “pressure” to build up — even with zoning that allows significant height if FAA permits are met.
What This Means for Phoenix’s Future
Phoenix still has room to grow vertically — but:
- FAA height contours will remain the ceiling unless flight paths change
- Developers must secure determinations of no hazard from the FAA before going taller
- New projects like Astra show demand for taller buildings is rising
As Phoenix’s urban core densifies and land becomes scarcer, its skyline may yet reach higher — but always within the invisible grid drawn by aviation safety.
Related External Links
- Phoenix Sky Harbor International Airport Official Website
- FAA Obstruction Evaluation / Airport Airspace Analysis (OE/AAA)
- City of Phoenix Planning & Development Department
- Council on Tall Buildings and Urban Habitat (CTBUH)
- Los Angeles World Airports (LAX Authority)
- Phoenix Skyscraper Database & Diagrams
- Los Angeles Skyscraper Database & Diagrams
Dive into “The Knowledge,” where curiosity meets clarity. This playlist, in collaboration with STMDailyNews.com, is designed for viewers who value historical accuracy and insightful learning. Our short videos, ranging from 30 seconds to a minute and a half, make complex subjects easy to grasp in no time. Covering everything from historical events to contemporary processes and entertainment, “The Knowledge” bridges the past with the present. In a world where information is abundant yet often misused, our series aims to guide you through the noise, preserving vital knowledge and truths that shape our lives today. Perfect for curious minds eager to discover the ‘why’ and ‘how’ of everything around us. Subscribe and join in as we explore the facts that matter. https://stmdailynews.com/the-knowledge/
Food and Beverage
Lifesum Survey: 90% Say Ultra-Processed Foods Are Engineered to Be Hard to Stop Eating
A new nationally representative survey from health app Lifesum suggests Americans increasingly view ultra-processed foods (UPFs) as more than a “willpower” issue. The research, based on responses from 2,000 U.S. adults, found 90% believe UPFs are intentionally engineered to be hard to stop eating—while 81% say they’ve personally felt unable to stop once they start.
Ultra-Processed Foods Under Fire: New Data Shows Regret, Loss of Control, and Calls for Regulation
The survey also points to a widespread “control and regret” loop: 67% report they’ve tried and failed to cut back on certain ultra-processed foods, and 80% say they feel regret or frustration after eating them. The findings land as UPFs remain a dominant part of the American diet—federal dietary data indicates more than half of calories consumed in the U.S. come from ultra-processed foods, and high consumption has been linked in multiple studies to higher risks of obesity, type 2 diabetes, and cardiovascular disease.
Lifesum says the data reflects shifting public attitudes toward stronger oversight. In the survey, 81% support clearer warning labels on ultra-processed foods, 59% support restrictions on marketing, and 47% support regulation similar to tobacco or alcohol. The release also cites a recent report from researchers at Harvard University, the University of Michigan, and Duke University arguing that UPFs share similarities with cigarettes—such as engineered reward pathways and marketing designed to drive repeat consumption—strengthening the case for tighter regulation.
What to watch for
- Labeling momentum: With 81% backing warning labels, expect more debate over front-of-package disclosures and clearer definitions of “ultra-processed.”
- Marketing restrictions: The 59% support level signals potential policy focus on advertising practices—especially around kids and high-frequency digital targeting.
- Regulation framing shift: The 47% support for tobacco-style rules suggests UPFs may increasingly be discussed as a public health and consumer protection issue, not just nutrition advice.
- Scientific scrutiny vs. industry response: As more researchers compare UPFs to cigarettes, watch for counter-messaging from food manufacturers and lobbying around how UPFs are categorized.
- Consumer behavior tools: Demand may grow for evidence-based guidance and tracking tools (apps, labeling systems, education campaigns) that help people reduce UPF intake without relying solely on self-control.
Source
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Authors
The Knowledge
“The Woman Who Invented the Home Security System”
Before smart homes, Marie Van Brittan Brown invented the first home security system in 1966—pioneering safety tech that still protects millions today.
Last Updated on May 1, 2026 by Daily News Staff
Part of the “Forgotten Genius Fridays” series from The Knowledge
🚨 Before Ring, There Was Marie Van Brittan Brown
Long before smart doorbells and mobile alerts became the norm, a nurse from Queens was already thinking ahead.
In 1966, Marie Van Brittan Brown, a Black woman living in New York City, felt unsafe in her neighborhood. Her husband, Albert, worked late hours, and she was often home alone. With crime on the rise and no real way to know who was at the door, she took matters into her own hands.
So she did what few people would think to do:
Home Security System
She invented the modern home security system.
🛠️ How It Worked
Marie and Albert Brown designed a closed-circuit television system with:
A camera mounted on the door Peepholes at different heights A live-feed monitor inside the home A microphone for two-way communication And a panic button to instantly alert the police.
In 1969, they were granted U.S. Patent No. 3,482,037, and that system laid the foundation for many of today’s smart home security tools.
📄 View the original patent here
Check out this Link: Marie Van Brittan Brown and Albert L. Brown ( Wikipedia)
🔄 Lasting Impact
Marie’s invention wasn’t just revolutionary—it was personal. Her system was designed for peace of mind, especially for women and families in vulnerable communities. Today, elements of her design show up in everything from Ring and Nest to intercom-equipped apartment doors.
She didn’t just protect her home—
she helped create the smart home.
🎥 Watch the full short video (under 75 seconds):
👉 YouTube Shorts – The Knowledge
📱 TikTok & Reels: @stmdailynews
🧠 Now you know.
— STM Daily News
Dive into “The Knowledge,” where curiosity meets clarity. This playlist, in collaboration with STMDailyNews.com, is designed for viewers who value historical accuracy and insightful learning. Our short videos, ranging from 30 seconds to a minute and a half, make complex subjects easy to grasp in no time. Covering everything from historical events to contemporary processes and entertainment, “The Knowledge” bridges the past with the present. In a world where information is abundant yet often misused, our series aims to guide you through the noise, preserving vital knowledge and truths that shape our lives today. Perfect for curious minds eager to discover the ‘why’ and ‘how’ of everything around us. Subscribe and join in as we explore the facts that matter. https://stmdailynews.com/the-knowledge/
Forgotten Genius Fridays
Forgotten Genius Friday: The Legacy of Thomas Jennings — America’s First Black Patent Holder
Discover how Thomas Jennings, the first African American to receive a U.S. patent, revolutionized garment care with his dry-cleaning invention and supported abolitionist causes.
In the early 19th century, long before modern dry cleaners lined city streets, one man quietly transformed how Americans cared for their clothing. His name was Thomas Jennings—a tailor, entrepreneur, and trailblazer whose innovation would earn him a historic place in U.S. history.
Breaking Barriers in a Divided America
Born in 1791 in New York City, Jennings lived in an era when opportunities for African Americans were severely limited. Yet he built a successful tailoring business, gaining a reputation for craftsmanship and attention to detail.
At the time, cleaning delicate garments—especially wool—was a persistent challenge. Traditional washing methods often damaged fabrics, leaving customers frustrated and tailors searching for better solutions.
Jennings saw not just a problem, but an opportunity.
The Invention of “Dry Scouring”
In 1821, Jennings developed a cleaning method he called “dry scouring,” a precursor to modern dry cleaning. Unlike water-based washing, his technique used chemical solvents to remove dirt and stains without harming fabric fibers.
That same year, he achieved a groundbreaking milestone: Jennings became the first African American to receive a U.S. patent.
This was no small feat. Patent laws at the time largely excluded enslaved individuals, and systemic racism made legal recognition difficult even for free Black citizens. Jennings’ success marked a rare and powerful breakthrough.
“His achievement stands in stark contrast to what followed—when laws would deny many Black innovators the right to claim their own ideas.”
Innovation With Purpose
Jennings didn’t just profit from his invention—he used his success to support a broader cause. The income generated from his patent helped fund abolitionist efforts, contributing to the fight against slavery in the United States.
His work intersected with the growing abolitionist movement decades before the American Civil War, demonstrating how innovation and activism often went hand in hand.
Lasting Impact on Modern Life
Today, dry cleaning is a global industry, essential to fashion, hospitality, and everyday life. While technologies have evolved, the core concept Jennings pioneered remains intact.
His legacy can be seen in:
- The modern dry-cleaning industry
- Textile preservation techniques
- The broader recognition of Black inventors in American history
Why Thomas Jennings Still Matters
Jennings’ story is not just about an invention—it’s about access, perseverance, and impact. At a time when the odds were stacked against him, he secured intellectual property rights, built a business, and used his platform to support social change.
For today’s innovators, his journey underscores a powerful truth: meaningful breakthroughs often come from those willing to challenge both technical problems and societal barriers.
Final Word
As part of STM Daily News’ Forgotten Genius Friday series, the story of Thomas Jennings serves as a reminder that some of the most influential figures in American innovation history are still waiting to be fully recognized.
His invention didn’t just clean clothes—it helped clear a path for future generations of inventors.
Related Articles & Further Reading
External Sources
- Thomas Jennings – Wikipedia Overview
- National Park Service: Thomas Jennings Biography
- BlackPast.org – Thomas Jennings Profile
- USPTO – African American Inventors and Innovation History
- Smithsonian Institution – Thomas Jennings Feature
