PO Box 837
Mahwah, NJ 07430

213 Route 100
Katonah, NY 10536


Who we are & who we serve:
Upstate Development is a New York State Corporation owned and operated by Robert Roselli, PE. A licensed Professional Engineer in NY, NJ and CT. SDN Design Group is a New York State registered Company owned and operated by Nelson Guerrero.

We operate throughout southern NY State and northern and central NJ and southwestern CT. Our expertise includes all phases of residential land development and associated disciplines.

Areas of expertise:

- Subdivisions.
- Septic Systems.
- Site Development.
- Commercial and Residential Site Plans

- Foundation Plans.
- Retaining Wall Design.
- Grading and Drainage.
- Residential Architectural Plans ( New and additions; NY only).


Home | Contact Us