CAM Charges — Guides for Commercial Tenants

How Common Area Maintenance billing works, where it goes wrong, and how to check your own.

• CAM Overcharge: The Complete Guide for Commercial Tenants

  Start here. The most common CAM overcharge mechanisms — denominator, gross-up, non-recoverable costs, year-over-year spikes — each linked to a deep dive.

• How to Cross-Check Your CAM Charges (Free) — Step by Step

  The verification method: check your share, the building denominator, the cost level and line items against your lease and public data — without confronting the landlord.

• Uniqlo's $450K CAM Dispute: How "Proportionate Share" Gets Inflated

  What the Uniqlo–Gazit Newbury Street lawsuit shows about the building denominator — and how to cross-check your own share against public records.

• What Is a CAM Cross-Check? (And How It Differs From a Lease Audit)

  The independent first check that verifies your landlord's CAM against public data — before, or instead of, a $2,500–$15,000 audit.

• What Is "Additional Rent" (NNN / CAM) on a Commercial Lease?

  Plain-language guide to the operating costs you pay on top of base rent — and where they go wrong.

• 5 Ways Landlords Overcharge CAM — and How to Catch Them

  The five most common overcharge patterns, with how to spot each on your own statement.

• What Can't Legally Be in Your CAM Charges

  What generally can't be passed through — and the lease language that protects you.

• CAM Charges FAQ — Is My Landlord Overcharging?

  Quick answers: management fees, capital improvements, reconciliation jumps, and your review rights.

• How to Read Your CAM Reconciliation Statement

  The annual true-up is where overcharges hide — the three things to check before you pay.

• Why You Got a Surprise Year-End CAM Bill (the "True-Up" Explained)

  Why the catch-up bill happens, when it's a red flag, and your window to dispute before you waive it.

• Your Pro-Rata Share: The Most Common CAM Overcharge

  How the building denominator quietly splits every CAM dollar wrong — and how to cross-check it.

• Gross-Up in CAM Charges, Explained

  The clause that bills you as if the building were full — and how it inflates your share.

• How to Verify Your CAM Charges With Public Records

  Cross-check the landlord's numbers against free public data — county building size, REIT filings, BOMA benchmarks.

• California SB-1103: What Small Business Tenants Can Do About CAM Overcharges

  The Commercial Tenant Protection Act gives qualified small tenants the right to documented, proportional CAM.

• How to Use Your SB-1103 Records-Inspection Rights

  Step by step: how a qualified California tenant demands the itemized CAM backup, allocation tabulation, and signed attestation.

• Multi-Location Shopify Merchant? You May Be Overpaying CAM at Every Store

  Small per-store CAM errors compound across a retail portfolio — how omnichannel merchants can cross-check every location at once.

Tools

• CAM Overpayment Calculator

  Estimate the annual dollars at stake when your landlord's building denominator is overstated — free, no sign-up.

Informational only; not legal advice and not an audit or attest service. © ReCAM Technologies LLC.