If you've spent any time driving along the North State Parkway or the LIE in Nassau County, you've seen it. That massive, glass-heavy structure sitting right at the junction of everything important. It's 100 Jericho Quadrangle. Honestly, most people just call it "the Quad." But it’s not just some random office park where people go to stare at spreadsheets until 5:00 PM. It is basically the central nervous system for high-end corporate life on Long Island.
Location is everything. You know the cliché. But here, it’s actually true.
Jericho is weirdly perfect for business. You’re close enough to the city that you don’t feel like you’re in the sticks, but you’re far enough away that you can actually find a parking spot without losing your mind. 100 Jericho Quadrangle sits in this sweet spot. It’s a Class A office space, which is just real estate speak for "the fancy stuff." We’re talking about 1.1 million square feet across the whole complex, with 100 Jericho being a primary pillar of that presence.
What’s actually inside the glass?
People think these buildings are just empty shells. They aren't. When you walk into the lobby of 100 Jericho Quadrangle, you're stepping into a space managed by the Onyx Equities team, who took over a few years back and poured a ton of money into making it feel less like a 1980s relic and more like a modern hub.
The tenant roster is a "who's who" of regional power. You have law firms like Nixon Peabody—who are huge—and accounting giants. It's the kind of place where deals happen over mediocre coffee that somehow tastes better because of the zip code. The building features an on-site cafe, a fitness center that people actually use, and conference facilities that don't smell like old carpet.
The architecture is interesting, too. It’s got these wide-open floor plates. Why does that matter? Because modern companies hate cubicles. They want "collaborative spaces." Basically, they want to see if Steve is actually working or just looking at vacation rentals. 100 Jericho Quadrangle was designed in a way that allows these massive, sprawling layouts that you just can't get in a Manhattan skyscraper without paying triple the rent.
The Jericho Quadrangle Ecosystem
It’s not just one building. It’s a neighborhood.
When you work at 100 Jericho Quadrangle, your life revolves around a very specific set of landmarks. You’ve got the Milleridge Inn right down the road for those "we just signed a big contract" lunches. You’ve got the Whole Foods nearby for the "I forgot to buy dinner" rush. It’s a self-contained world.
👉 See also: Why Toys R Us is Actually Making a Massive Comeback Right Now
The competition is stiff, though. You have other major hubs like Melville or Garden City. But Jericho wins on the commute. If you live in Syosset, Brookville, or even parts of Queens, getting to 100 Jericho Quadrangle is a breeze compared to the nightmare of the Meadowbrook Parkway.
The Onyx Transformation
Let’s talk about the money. A few years ago, the whole complex underwent a massive renovation. We're talking millions. They updated the common areas because, let's be real, the old ones were looking a bit tired. They added more outdoor seating and "wellness" features.
Why? Because the workforce changed.
Post-2020, nobody wants to go to a boring office. If you're going to make someone leave their couch, the office has to be better than their house. 100 Jericho Quadrangle tried to solve that by making the environment feel more like a hospitality space than a dungeon. They focused on natural light. Tons of it. The glass facade isn't just for show; it keeps the seasonal affective disorder at bay during those brutal Long Island winters.
Getting there and staying there
Parking. Let’s talk about the one thing that actually matters to Long Islanders.
The parking situation at 100 Jericho Quadrangle is actually decent. It’s a mix of surface lots and structured parking. If you’ve ever tried to park at a train station in Nassau County, you know that a dedicated spot is basically a luxury item. Here, it’s just part of the lease.
Access to the Long Island Expressway (Exit 41) and the Northern State (Exit 35) is literally right there. You can be on the highway in three minutes. That is a massive selling point for the "C-suite" crowd who lives in the Gold Coast mansions nearby. They can be at their desks in ten minutes without ever hitting a red light.
✨ Don't miss: Price of Tesla Stock Today: Why Everyone is Watching January 28
Why companies are still signing leases here
You might hear that the office market is dead. It’s not. It’s just picky.
Companies are fleeing "Class B" buildings—the ones with the flickering fluorescent lights and the weird smells. They are moving into "Class A" spaces like 100 Jericho Quadrangle because it helps them recruit. If you want a top-tier attorney or a high-level CPA, you can't put them in a basement.
The building also offers a level of redundancy that smaller spots can't touch. Backup power, high-speed fiber, sophisticated security systems. It’s built for businesses that can’t afford to be offline for even a second.
The "Hidden" Perks
There’s a certain prestige to the address. 11753. It’s a zip code that carries weight in the Tri-State area.
- Networking: You run into everyone in the lobby. Seriously. You'll see the partner of a law firm you’ve been trying to land, or the CEO of a tech startup.
- The Food Scene: Beyond the on-site cafe, the surrounding area is a goldmine. Jericho Turnpike is a gauntlet of everything from high-end sushi to the best diners in the country.
- The Vibe: It feels professional. There’s a buzz in the morning when the cars start rolling in. It feels like things are being built, moved, and sold.
Realities of the 100 Jericho Quadrangle space
Is it perfect? Nothing is.
Traffic on Jericho Turnpike during rush hour is still a nightmare. You have to timing your exit perfectly or you’ll be sitting there watching the light change four times. And because it's a premium building, the rent isn't cheap. You’re paying for the glass, the lobby, and the prestige.
But for a mid-to-large-sized firm, the math usually works out. The cost per square foot is still a fraction of what you’d pay in Midtown Manhattan, and your employees won't quit because they hate the commute.
🔗 Read more: GA 30084 from Georgia Ports Authority: The Truth Behind the Zip Code
Actionable insights for businesses looking at Jericho
If you are considering moving your operations to 100 Jericho Quadrangle, do not just look at the floor plan.
First, check the "load factor." This is the percentage of the building's common area that you're paying for in your rent. In big buildings like this, it can be significant.
Second, talk to the Onyx management about "build-outs." They are often willing to negotiate on how much they’ll contribute to customizing your space.
Third, visit during a rainy Tuesday at 5:00 PM. See what the exit strategy looks like. If you can handle the Jericho Turnpike crawl for ten minutes, you're golden.
Steps to take next:
- Audit your current commute: Calculate the "saved hours" for your executive team if they shifted from a Manhattan or Brooklyn commute to a Jericho-based one. Usually, it's about 10–15 hours a week per person.
- Evaluate "Class A" requirements: Determine if your brand actually needs the prestige of a building like 100 Jericho Quadrangle or if you can survive in a smaller, less-equipped space.
- Contact a local tenant rep: Don't call the number on the sign yourself. Get a broker who knows the Jericho market to see what "off-market" concessions are currently being offered.
- Visit the amenities: Actually eat the food at the cafe. Walk the gym. If you're paying for these features as part of your lease, make sure they meet your standards.
100 Jericho Quadrangle remains a landmark for a reason. It’s the intersection of convenience and corporate ambition. Whether you're a legal powerhouse or a growing tech firm, this address still says you've arrived.