1. What a report is, and what it is not
An Envelope zoning feasibility report is an informational study generated by software from public records (NYC PLUTO, Geoclient, DOB and DCP datasets) and the text of the New York City Zoning Resolution. It is produced for due-diligence and underwriting purposes so that you can decide whether a site deserves the attention of licensed professionals. It is not architectural, engineering, surveying, legal, tax, appraisal or investment services, and it is not professional advice.
Envelope and West Egg Development are not licensed architects, professional engineers, land surveyors, attorneys, appraisers or brokers, and no professional-client relationship of any kind is created by generating, buying, reading or sharing a report. The New York City Department of Buildings and Department of City Planning make the determinations that govern what may be built on a lot; where a report and an agency differ, the agency controls.
Every figure in a report is the engine's reading of the sources above at the time it ran. Public records are sometimes wrong or stale, lot dimensions come from tax records rather than a survey, zoning text changes, and a lot's actual constraints (easements, landmark status, environmental conditions, prior filings, title) may not appear in any dataset we use. Before you buy a lot, sign a lease, commit capital or file plans, have a registered architect and a zoning attorney verify the report against the site.