Premises Liability · NYC's Toughest Testing Ground

A Quarter-Inch Can Decide a Case. We Measure It Before Anyone Else Does.

Every §7-210 sidewalk claim comes down to the same question a jury will eventually ask: how big was the defect, really? Expertmapco answers it with field data, not adjectives; captured within 48 hours, documented to a standard that survives cross-examination, and built specifically to defend NYC property owners and their insurers. 

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The Stakes

NYC Administrative Code §7-210 shifted sidewalk liability onto the abutting property owner, which means, in practice, onto the insurer standing behind them. A plaintiff only needs to allege a defect. The defense needs to prove, with numbers, whether that defect ever rose to the level of “actionable.” That distinction de minimis versus dangerous is won or lost in the first 48 hours, before a repair crew paves over the only evidence that matters.

We’ve watched claims collapse for insurers simply because no one measured the flag in time. We’ve also watched a single, well-documented height differential end a six-figure demand in a mediation room. The difference was never the law. It was who showed up with a tape measure and a camera before the sidewalk changed.

Our Methodology

48-hour field mobilization

because every day a defect sits unmeasured is a day the plaintiff's version of events goes uncontested

Scaled, reference-anchored photography

Using rulers and coin-scale markers, so every image is court-admissible on its own

Slope and height-differential analysis

Performed to a repeatable, defensible standard, not eyeballed, not estimated

Photogrammetric reconstruction

To extract precise measurements from field data, even after the fact

§7-210 compliance review

Weighing the finding against current code to determine de minimis status, maintenance history, or causal disconnect from the alleged fall

Who This Is For

Insurance defense counsel who need the facts locked down before the plaintiff's expert gets there first

Property owners and their carriers exposed under §7-210's shifted liability standard

Claims adjusters trying to value or decline; a demand before it escalates

What You Get

A deposition-ready written report built to withstand aggressive cross-examination

Annotated, color photo montages a jury can understand in seconds

A full slope and height-differential profile with methodology disclosed

A §7-210 compliance narrative that gives counsel a clean, citable defense position

Related Services

  • Accident Site Mapping
  • Expert Testimony & Litigation Exhibits
  • Boundary Disputes & Easement Analysis
  • Land & Building Surveying & Mapping
  • Trip & Fall, Slip & Fall
  • Accident & Site Mapping
  • Adverse Possession
  • Right of Way & Easements
  • Right of Way & Easements
  • Zoning & Land Use Planning
  • Flood Plain, Elevation, Datum & Grading Drainage Issues
  • Land Development & Earthwork
  • Utility & Mark Out Issues
  • Professional Negligence
  • Standard of Care Evaluation

Frequently Asked Questions (FAQs)

Courts weigh the physical dimensions of the defect alongside its location, lighting, foot traffic, and surrounding context; there’s no single magic number. What tips the scales is precise, defensible measurement rather than a witness’s estimate of “about an inch or so,” which is exactly the gap our field analysis closes.

Faster than feels necessary. Repairs, weather, and simple time can quietly erase the only physical evidence that will ever exist of the condition; we typically mobilize within 48 hours specifically to prevent that window from closing.

Yes, and often that’s where it does the most work. A clear, scaled exhibit tends to shorten negotiations dramatically, because it replaces a “he-said, she-said” dispute with a number nobody can argue with.

Substantially. A standard survey establishes boundaries and improvements; a §7-210 report is built specifically to answer a legal liability question, with slope, height-differential, and maintenance-history findings framed against the exact code language a court will apply.

It’s still worth a call. Photographs, prior complaints, permit records, and neighboring conditions can sometimes reconstruct enough of the picture to support a defense, though nothing replaces the strength of measurements taken before repairs occur, which is why speed matters so much on the front end.

The Sidewalk Won't Stay This Way.

Neither should your evidence gap.

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