Uniqlo's $450K CAM Dispute: How "Proportionate Share" Gets Inflated
A national retailer is now litigating the exact line of math that quietly raises commercial tenants' Common Area Maintenance (CAM) bills. According to the Boston Business Journal, Uniqlo has sued its landlord, Gazit Horizons, in Suffolk Superior Court, seeking more than $450,000 it alleges it was overcharged at 341 Newbury Street in Boston. Uniqlo claims it was wrongfully charged for common areas and billed an improperly large proportionate share of total building costs — its share allegedly inflated after the landlord reduced the building's total square footage. The allegations are unproven and the case is ongoing. But the mechanism at its center is one almost every tenant overlooks, and it is one you can check on your own statement today.
What the case turns on: the building denominator
Your proportionate share — the percentage of the building's operating costs you pay — is a fraction:
Your share = your rentable square footage ÷ the building's total rentable square footage.
The number on the bottom, the building's total square footage, is the denominator. It is also the silent lever. If that total is reduced, the fraction gets larger — so your share of CAM, taxes, and insurance rises — even though your own space never changed. That is the alleged dynamic in the Uniqlo matter: reduce the building's stated size, and every tenant's percentage goes up. A smaller building on paper means a bigger bill in the mailbox.
Why this is so easy to miss
The denominator usually appears nowhere on the CAM reconciliation statement. You see a percentage — "your share is 7.3%" — but not the building square footage that produced it. So a change in the denominator is invisible unless you go looking for it. Most tenants don't, because the bill arrives from the landlord's own accounting team and looks authoritative. The proportionate-share line is rarely questioned, which is exactly why it's a recurring source of disputes. (For a fuller walkthrough of this single number, see Your Pro-Rata Share: The Most Common CAM Overcharge.)
How to cross-check your proportionate share against public records
You don't have to take the building size on faith. There are independent, public sources for it that the landlord doesn't control:
- County / assessor Gross Building Area (GBA). County records list a recorded gross building area for the property. Compare it against the building total your landlord used to compute your share. If the landlord's figure is smaller than the public GBA, your denominator may be understated.
- The landlord's own SEC filings. If your landlord is a public REIT, it reports building sizes in its 10-K and other filings. A building size in a public filing that's larger than the one used on your statement is worth a question.
- Year-over-year. Pull last year's statement next to this year's. If your stated share rose without your space changing, the denominator likely moved — and that's the moment to ask why.
A gap between the landlord's stated building size and the public record doesn't prove an overcharge — assessor categories and rentable-area definitions can differ, and there are legitimate reasons a building total changes. What it does is give you a specific, sourced question to put to your landlord, backed by a record they didn't write.
What to do if your numbers don't line up
Most commercial leases give the tenant a window to request and review the supporting records behind a reconciliation — but that right-to-review-records window often closes within a set number of days after the statement is issued. If your proportionate share looks off, the practical first step is to identify that window in your lease and, if it's open, send a written request for the building-area figure and the allocation tabulation behind your percentage. Bring anything that doesn't reconcile to your own attorney or auditor for advice; a cross-check tells you where to look, not what your legal rights are.
Check your own proportionate share — free
ReCAM is a cross-check tool. The free Cross-Check needs no upload and no sign-up: you enter a few numbers from your statement, and it checks the share math and cross-checks public data that's already out there — including a public REIT landlord's filings and published BOMA operating-cost benchmark ranges — to flag whether your proportionate share and CAM rate look out of line. The Pro tier adds the document-level cross-check that compares your landlord's stated building size against the county GBA denominator, reviews the reconciliation line-by-line, and runs the year-over-year comparison. Either way, the output is an informational note for your review — not an audit, and not legal advice.
Related guides
- Your Pro-Rata Share: The Most Common CAM Overcharge
Why the building denominator is the silent lever, and what denominator contraction looks like.
- How to Verify Your CAM Charges With Public Records
Cross-check a landlord's CAM using free public data — county GBA, REIT filings, and BOMA benchmarks.
- 5 Ways Landlords Overcharge CAM — and How to Catch Them
The most common overcharge patterns, with how to spot each on your own statement.
- What Is a CAM Cross-Check? (vs a Lease Audit)
How an independent public-data cross-check differs from a fee-based lease audit.
Start the free CAM cross-check →
Informational only; not legal advice and not an audit or attest service. Descriptions of pending litigation reflect public reporting of unproven allegations. ReCAM is not a CPA firm and these services are not regulated by any state board of accountancy. © ReCAM Technologies LLC.