New York SEQR and CEQR
Manage a New York environmental review in one place.
Project facts, maps, regulations, studies, tasks, and sources come together to help you plan the review, understand each result, and track what still needs a practitioner, specialist, or agency.
- 20,988New York environmental reviews, from NYC CEQR and NYS SEQR filings
- 150,386pages of decision documents, indexed and searchable
- Everysearchable passage includes its source page
Counts measured August 13, 2026.
How it works
Start with a project description, and a workspace opens with the site screening, likely requirements, and everything the team needs to manage the work and its record.
- 01
Describe the project
Enter what is proposed, its size, and its location to check the site against public agency maps and data.
- 02
Review the likely requirements
See the preliminary SEQR classification, possible permits, agencies, and likely studies, each with its basis.
- 03
Plan the work
Create tasks for studies, filings, agency coordination, and open questions, assign owners, and track progress.
- 04
Run available calculations
Use published methods to prepare planning estimates, and when fieldwork or a specialist is required, see what to request.
- 05
Coordinate with agencies
Keep contacts, correspondence, responses, and deadlines with the project instead of across separate email threads.
- 06
Build the record
Keep every document, source, figure, calculation, and agency response with the work it supports.
How we test it
We test calculations against completed reviews.
We run Plexus calculations on completed New York projects and compare the results with the studies that were filed for those projects.
We publish the result, sample size, test standard, and known limitations, and we say when a calculation does not meet its standard.
What is available today
Of 21 supported study types, 9 include a planning calculation and 1 has met its current test standard against filed studies, while the other 12 help teams organize review work and sources but do not calculate a result. See our approach, study by study →
See how each result was produced
Every result stays connected to the project facts, source, calculation, and next action, so your team can check the work and see what still needs professional review.
Wetlands, habitat and species
The result names the public dataset, its date, and whether the mapped feature intersects the site or remains nearby.
Check the source: open any result to see the source and project facts used.
Review the calculation: every result carries the figures it used, the assumptions, the method and its standing.
Know who must decide: work that needs a practitioner, specialist, or agency is clearly marked.
Access
Try Plexus on a real project.
Enter an address and describe the proposal to receive a free preliminary classification with its Part 617 citation, a site-constraints screen, and a list of information the review still needs, plus 14 days of the full product.
No card to start; see what continuing includes.