Oak Brook is a different kind of affluence from the communities that line Lake Michigan to the north. There are no beachfront estates or inherited social hierarchies. What Oak Brook has built, over several decades, is something more fluid and more international — a community of accomplished households drawn by proximity to corporate infrastructure, an airport, excellent schools, and the kind of low-key, high-functioning suburb that allows serious people to live seriously without ceremony. Its residents include a significant concentration of South Asian and Middle Eastern business-owner wealth: entrepreneurs, physicians, and operators who have built enterprises and acquired properties and approach both with the same disciplined rigor.

The average Oak Brook home now values near $850,000, up 6.7 percent over the past year. Upper-tier properties and estates trade well past two million. And the buyer here — often managing holdings in multiple states, often paying cash, often making decisions on a timeline no one else sets — has begun doing the arithmetic on Illinois.

The arithmetic is not complicated. It is simply larger than most people say out loud.

IThe tax that finds income wherever it lives

Illinois imposes the highest combined state and local tax burden in the nation — $13,099 per household annually, $4,472 above the national average, nearly 52 percent more. For the Oak Brook business owner whose income flows through a pass-through entity, the flat 4.95 percent rate applies to every dollar with no bracket and no ceiling. On $600,000 in business income, that is nearly $30,000 a year to the state before property tax. On a million dollars, nearly $50,000.

But the more consequential consideration for the multi-property owner is the residency question. Illinois bases its income tax on residency. Which means that for a household that spends meaningful time in multiple states — a business in Illinois, a vacation property in Florida, a family home that might be anywhere — the question of where primary residency is established is not an administrative detail. It is a financial architecture decision.

Florida has no state income tax. Establishing primary residency there means that the 4.95 percent rate that Illinois applies to every dollar of a household's income disappears — on salary, on distributions, and on the eventual proceeds of a business or property sale. For a household managing multiple assets across multiple states, this is often the single most valuable change available.

IIA market built for this buyer

The Oak Brook buyer does not approach a real estate decision the way a first-time homebuyer does. They evaluate assets. They compare returns. They understand the difference between a purchase driven by lifestyle and one driven by capital efficiency — and they are rarely satisfied with only one of those dimensions. Vero Beach offers both.

The all-cash transaction rate at Vero Beach is 62.7 percent — the highest in the country. That figure is not a market anomaly. It is a description of the buyer pool: liquid, unleveraged, accustomed to writing the check and moving to the next decision. The Oak Brook household will recognize the composition of that market before they recognize the address.

The financial entry point compounds the advantage. Comparable barrier-island and waterfront property in Vero Beach trades at roughly a two-thirds discount to equivalent inventory in Naples — the same Atlantic coast, the same private club communities, the same natural setting, at approximately 66 percent of the price. For a buyer who evaluates every asset against its alternatives, the spread between Vero Beach and Naples pricing represents one of the more durable value propositions available in the Florida luxury market today.

Grand Harbor and Sea Oaks — the barrier island's two premier private club communities — offer championship golf, deep-water marina access, and Atlantic beach club living on a coast that has been kept deliberately low-rise and low-density. Neither community requires a compromise on the standards the Oak Brook household already lives at. Both are available at valuations that hold up under the kind of scrutiny this buyer applies to everything else they own.

IIIThe 2026 window and why it matters for a portfolio

Florida's tax advantage is permanent on two of its three pillars. The third has a deadline.

HJR 1-F, an expansion of Florida's homestead protection, passed the Legislature in June 2026 — House 75 to 26, Senate 30 to 9 — and goes before Florida voters this November, requiring 60 percent approval. The likelihood of passage is strong. A homeowner who establishes primary Florida residency before December 31, 2026 positions the household to benefit from the expanded homestead protections under consideration. For an owner managing multiple properties, establishing the primary residence correctly and on a defensible timeline is the kind of structural detail that distinguishes a well-planned transition from one that is revisited later.

IVThe Financial Concierge Desk — built for the multi-asset owner

A relocation for a household managing multiple properties and business interests is a coordination problem before it is a purchase. The destination is rarely the hard part. Establishing residency on the correct timeline, across the correct entities, with the advisory team aligned — that is the work. Our Financial Concierge Desk was built precisely for this household.

VEvaluating from Oak Brook

The Oak Brook buyer evaluates from a position of information, not urgency. We built the search experience to match that standard. Vero Premier Properties operates the only proprietary luxury real estate app within a hundred miles of Vero Beach — built for the buyer assessing the barrier island from out of market, at their own pace, with the full inventory available in real time.

Search Grand Harbor and Sea Oaks from Oak Brook, in real time

Every barrier island community — Grand Harbor, Sea Oaks, John's Island — with collaborative tools built for the out-of-market buyer who evaluates on their own terms. Available on the App Store (ID: 6744754515). Our listings reach contract roughly 40% faster.

We hold membership in the International Luxury Alliance, a referral network spanning 60 global markets — which is particularly relevant for the Oak Brook household with international ties, international family members, or a portfolio that extends beyond Illinois. If you work with a Coldwell Banker Global Luxury agent anywhere in the DuPage corridor, the handoff to our practice is direct and the representation is continuous.

RealTrends Top 1.5% Nationally2,000+ transactions · $1.2B+ in career sales volume

Apple News Top 10 Most Trusted Realtors in Florida — 2025Named among the state's most recognized luxury practitioners

International Luxury Alliance · 60 Global MarketsActive referral network across six continents

Cleveland Clinic Preferred Physician RealtorsThe only designation of its kind in Indian River County