Contact
North Castle Ventures is the sponsor and owner of the Armonk Professional Center portfolio. Correspondence reaches the sponsor here; property, campus, and software inquiries are answered faster by the team that holds the mandate, so those routes are named below.
Mail channels
Each link opens your own mail client with the routing context already filled in, so an inquiry lands with the right owner without a qualifying round. No message is submitted through this site.
General corporate
Company, entity, and ecosystem questions that are not tied to a specific suite, building, or software deployment. Reaches the North Castle Ventures general channel.
info@northcastleventures.com
Compose messageCapital & underwriting
For partners evaluating the asset class: the yield-on-cost model, the lease structure separating PropCo from OpCo, and reference node economics. Reaches the principal directly.
parham@northcastleventures.com
Compose messagePress & standards
Press inquiries about the sponsor and portfolio, and editorial questions on the vendor-neutral AI-Native Office specification stewarded by North Castle Ventures.
info@northcastleventures.com
Compose messageRouting
North Castle Ventures owns the campus and its buildings; it does not manage suites or operate the software. If your inquiry names one of the following, the destination owner can answer it directly. The sponsor's general channel remains the fallback for all of them.
Suite-level questions and current availability at 355 Main Street — Node 1. Availability must be verified on the property site.
Campus identity, shared infrastructure, and office-campus inquiries spanning 355 Main and fully leased 357 Main.
Sovereign Shells manages and operates the campus on behalf of its owner, and conducts documented assessment and suite conversion delivery.
Nate — Native Agentic Technical Engineer — is independently operated by Native Agentic. Diagnostics and orchestration questions route there.
The open, vendor-neutral specification stewarded by North Castle Ventures. Editorial and conformance questions belong with the maintainers.
Office
41.1265° N, 73.7140° W
Mail reaches the sponsor faster than voice, and leaves a written record of the request. Facsimile +1 (212) 686-2015.
Parham Alizadeh
Principal
Sponsor-level matters — capital, underwriting, and portfolio strategy — are handled by the principal.
This is the sponsor's correspondence address, not a leasing office and not a statement of suite availability. 357 Main is fully leased; current availability at 355 Main must be verified on the property site. Nothing on this page constitutes an offer of space, an assessment outcome, or a representation about infrastructure at any specific suite.
Acoustic, electrical, cooling, fiber, and dedicated-IP conditions are confirmed per building and per suite through a documented assessment, and depend on carrier, network, security, site, and lease conditions. Inquiries are answered by the named destination owner; a response is not a commitment to transact.