The record cargo wave everyone spent June and July talking about is no longer a forecast. It’s on the ground. July is closing out at roughly 2.47 million TEUs through U.S. ports — an all-time monthly high, according to the National Retail Federation and Hackett Associates’ Global Port Tracker — and every one of those boxes was full of something that now needs a place to sit. The problem is that the space most businesses actually use is the space that isn’t there. National industrial vacancy looks comfortable at 9.2%, but small-bay warehouse space under 100,000 square feet is running between 4.4% and 4.8%. That is not a soft market. That is full.
This is the gap nobody priced in when they front-loaded inventory ahead of the tariff deadline. The big-box distribution space in Dallas and Phoenix is sitting empty; the 5,000-square-foot unit a contractor, a distributor, or a regional retailer actually needs is not. And when leased space runs out, the fallback has historically been on-site container storage — which is why our phones get busier every August. Here’s what the numbers look like, what the buy-versus-lease math actually says when you run it honestly, and what to get right if you’re putting a box on your lot before the fall rush.
What the Numbers Are Saying
Start with the vacancy split, because the headline number is misleading. National industrial vacancy stood at 9.2% in February 2026, more than triple the 3.0% record low set in early 2022, and that figure gets quoted as evidence the warehouse crunch is over. It isn’t — it’s just relocated. Big-box space in Dallas-Fort Worth, Phoenix, and Memphis is in clear oversupply. Small-bay space under 100,000 square feet is sitting at 4.4% to 4.8% nationally, and markets with real logistics density are tighter still.
Leasing activity backs that up. CBRE’s Q1 2026 industrial figures put leasing at 249.8 million square feet, up 14% year over year and on pace for a record year. Warehousing prices are up 5.5 points year over year and 9.3 points from two years ago. Rents are not behaving like a market with slack in it.
Then there’s what the Northeast costs. Average asking rent across the New Jersey and New York metro runs $14 to $20 per square foot annually, with Northern New Jersey — the premium corridor — at $19 and up. Newark averages $16.77; Jersey City averages $19 and tops out near $30. Self-storage is no relief either: a 10×20 unit in New York City averages $474 a month, per StorageCafe, against a $150 to $300 national range. And UPS and FedEx have run 5.9% general rate increases three years straight, well above the 3% to 4% that used to be normal.
Why the Small-Bay Squeeze Hits Hardest
The reason the tight segment is the small segment comes down to who built what. Developers spent the 2021 to 2023 boom putting up million-square-foot distribution centers for national tenants, because that’s where the capital was. Almost nobody built 8,000-square-foot flex bays. So when demand rotated back toward regional and small-business users, it rotated into a segment with essentially no new supply behind it.
That matters more than a vacancy percentage suggests, because small-bay leasing has terms attached. Landlords in a 4.5% vacancy market don’t do twelve-month deals on 6,000 square feet. They want three years, they want a personal guarantee, and they want annual escalators. A business that needs storage for one busy season is being asked to underwrite thirty-six months of it. That’s the real cost, and it doesn’t show up in the rent-per-square-foot number.
The seasonal timing makes it sharper. Back-to-school inventory is landing now, holiday inventory starts landing in September, and both are competing for the same square footage in the same six-week window. This is the same trade-and-freight story we track in our overview of the key trends shaping the shipping container sales industry, just showing up at the far end of the chain — as a space problem on a lot in Bergen County instead of a rate on a Shanghai booking.
The Container Math, Run Honestly
A 20-foot container occupies about 160 square feet of ground and holds roughly 1,170 cubic feet. At Newark’s $16.77 per square foot, leasing that same 160 square feet of warehouse runs about $2,683 a year. A used 20-foot unit currently costs $1,200 to $2,800 depending on grade and market, per Metal-Buildings.org’s 2026 pricing guide, with delivery adding $300 to $2,500 based on your distance from a yard.
Call it $2,000 for a solid used 20-footer and $500 for a local Northeast delivery. That’s $2,500 all-in against $2,683 a year in equivalent leased space. The container pays for itself in about eleven months and then costs nothing but the ground it sits on. Run it against a New York City 10×20 self-storage unit at $474 a month — $5,688 a year — and payback lands closer to five months. Our breakdown of affordable options for buying shipping containers walks through where those price points sit by condition.
Now the honest part, because a payback number that ignores what you’re giving up isn’t worth much. Leased warehouse space comes with loading docks, power, lighting, climate control, a roof over the aisle, and often staff and forklifts. A container on your lot comes with none of that unless you add it. Containers are wind-and-watertight, not climate-controlled — anything temperature-sensitive needs an insulated unit or a different plan entirely. You also need land you control and a municipality that permits accessory storage structures on it, which is not universal in dense Northeast towns.
Where containers win outright is durable, non-perishable, high-value inventory that needs to be secure and close: tools, equipment, building materials, packaged goods, seasonal stock, retail overflow. Where they don’t is refrigerated product, staffed pick-and-pack, or anything requiring a dock height door. Know which one you have before you buy.
What to Actually Buy
Grade first. For static on-site storage you do not need a cargo-worthy unit certified for ocean transit — wind-and-watertight is the standard that matters, and paying for CSC certification you’ll never use is money left on the table. Our guide to what to look for when buying a shipping container covers the inspection checklist: floor condition, door gaskets, corner posts, roof seams, and any patch work that looks newer than the rest of the box.
Inspection matters more in 2026 than it used to. Containers historically hit the resale market at 7 to 15 years old; today many aren’t retired until 10 to 20. An older fleet means the spread between a good unit and a rough one is wider than the price tags suggest. Look at the box, or send someone who will.
Size second. The per-square-foot math usually favors a 40-footer, but a 40-foot tilt-bed delivery needs roughly 100 feet of straight-line clearance, and plenty of commercial lots and back yards simply don’t have it. Our shipping container dimensions guide lays out real internal and door clearances, and if the answer is 20-foot, that’s where 20-foot inventory and used pricing stay most accessible.
Security third, and don’t skip it. A container full of inventory on an unlit lot is a target — the lock box, the locking rod configuration, and whether you’re adding an alarm are decisions to make before delivery, not after the first break-in. Our rundown of container security features covers what’s worth the money.
Get It on the Ground Before September
Timing is the part most buyers underestimate. Ground prep — firmness, leveling, overhead clearance, truck access — takes longer than the purchase does, and a quote that holds for 14 to 30 days can expire while you’re waiting on a gravel pad. Our delivery and placement guide covers the site requirements in detail.
Supply is on your side right now, and that’s the argument for moving. Used inventory nationwide holds good through mid-2026, per Arcon Container, and port-adjacent markets carry the deepest stock and softest pricing. Our New York, New Jersey, and Pennsylvania yards stay well stocked in both used and one-trip condition. A stocked yard is also a negotiating position — our primer on negotiating shipping container prices covers what’s actually flexible when the seller has units to move.
Wait until September and you’re shopping alongside every other business that ran out of room at the same time. The boxes will still be there. The pricing and the delivery calendar won’t be as friendly.
The Bottom Line
The warehouse market looks loose and isn’t — not in the size range most businesses actually lease. Small-bay vacancy under 5%, rents up 5.5 points in a year, Northern New Jersey at $19 a foot, and a record import wave landing right now add up to a squeeze that gets worse in September, not better. Against that, a used 20-foot container at roughly $2,500 delivered pays for itself in under a year and keeps working after that. It isn’t a warehouse and shouldn’t be sold as one. For dry, durable, secure storage on ground you already control, the math isn’t close.
If you’re weighing storage space this fall, our team can quote current new and used inventory, walk you through grade and sizing for what you’re actually storing, and get delivery scheduled before the September crunch. Request a quote today — the yard is stocked and the calendar is open, and neither of those lasts through the fall.
Sources: National Retail Federation / Hackett Associates Global Port Tracker (July 2026); CBRE Q1 2026 U.S. Industrial Figures; CommercialCafe National Industrial Report (2026); Cahoot warehouse market analysis (2026); WarehousingCosts.com 2026 lease-rate guide; CommercialCafe and PropertyShark Northern New Jersey industrial rent data (2026); StorageCafe New York City self-storage report (2026); Metal-Buildings.org 2026 shipping container cost guide; Arcon Container 2026 market outlook.