NYC DEP Site Connection (SD1 & SD2) Design & Filing
Site connection design, stormwater management, and DEP filing services for new developments and building expansions across NYC.
We work closely with the NYC Department of Environmental Protection (DEP) to develop compliant site connection solutions for new developments and building expansions.
Our engineers provide efficient designs that support successful project delivery, utilizing the latest in stormwater detainment and retainment technology.
From House Connection Proposals and Sewer Availability Studies to full Site Connection Applications (formerly SD1 & SD2), we manage every step of the design and filing process.
Our team ensures projects move smoothly from design through approval in a timely manner — coordinating with DEP, utility agencies, and project stakeholders throughout.
Solutions we provide.
- 01Site Connection Applications (formerly SD1 & SD2)
- 02House Connection Proposals
- 03Sewer Availability Studies
- 04Building Sewer Design
- 05New Sewer Services and Reuse of Existing Sewer Connections
- 06Connections to City Sewers, Private Sewers, and Private Drains
- 07Combined, Storm, and Sanitary Sewer Connections
- 08DEP Approvals, Permit Assistance, and Permit Processing
- 09Stormwater Management, Detention, and Retention Systems
- 10Blue Roof Detention Systems and Storm Drainage Design
- 11Stormwater Quantity Control and Discharge Compliance
- 12Water Main Design, Distribution Systems, and Service Connections
- 13Natural Gas Main Design, Distribution, and Utility Agency Coordination
- 14Utility Infrastructure Design and Capacity Analysis
- 15NYC DEP Sewer Design Standards Compliance and Application Preparation
- 16Regulatory Approvals, Agency Coordination, and Review Comment Responses
- 17Addendum and Construction Sketches
Let's get practical.
Tell us about your project — we'll respond with a tailored scope and a clear path forward.