NYC Topographical Bureau

What Is the Topographical Bureau?

The NYC Topographical Bureau, part of the Office of each Borough President, maintains official property survey records and street maps for every borough in New York City. The Bureau establishes legal property boundaries, street grades, and survey benchmarks that are foundational to every construction and development project in NYC.

The Bureau's records date back over 200 years and serve as the authoritative reference for property lines, street widths, and elevations throughout the city. Every time a new building is constructed, a lot is subdivided, or a property line is disputed, the Topographical Bureau's records are consulted before a plan can move forward.

Each borough runs its own Topographical Bureau office, and procedures vary between boroughs. The Bureau works closely with licensed land surveyors who prepare and file the detailed survey maps required for construction projects, property transactions, and legal proceedings — but the Bureau itself only reviews, files, and certifies those maps.

The Bureau's Jurisdiction & Authority

The Bureau's authority centers on the city's official map and the records that support it:

Limitations of the Topographical Bureau

The Bureau is a records office, not a survey firm and not a court — understanding those limits keeps a project on schedule:

• The Bureau does not conduct surveys itself — only licensed land surveyors can prepare survey maps. The Bureau reviews and records them.
• The Bureau does not resolve property disputes legally — boundary disputes that can't be resolved through records may require court action.
• The Bureau does not issue building permits — survey documents are a prerequisite for DOB filings, but DOB handles the actual permitting.
• Processing times vary significantly between boroughs and can range from days to several weeks depending on complexity and staffing.
• The Bureau's records may contain historical discrepancies, especially for older properties, requiring additional research and affidavits to resolve.
• The Bureau does not set zoning lot lines — those follow the DCP Zoning Resolution and can differ from tax-lot boundaries.

How BVS Works with the Topographical Bureau

BVS engages licensed surveyors, gathers historical records, and files the certifications the Bureau needs so that DOB and zoning calculations rest on the correct property description. On subdivisions, mergers, and lots where old records disagree with modern surveys, we handle the affidavits and cross-checks that keep the Bureau review from stalling a permit. Everything gets tied back into the DOB filing on the front end.

Understand the Topographical Bureau Better

Related guides that explain how Bureau records feed into the permits and approvals owners actually deal with:

The Bureau's records feed nearly every other agency's work. DOB requires certified surveys as a condition of most new-building and alteration permits, and DCP zoning calculations rely on the same lot dimensions. Curb cuts, street-widening lines, and revocable consent geometry connect to DOT, and transit-corridor easements can touch MTA property records. When a landmark lot is subdivided, LPC joins the review as well.