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NYC DOB Support of Excavation Permit and Requirements
A Support of Excavation (SE) permit addresses temporary systems used to retain soil or stabilize adjacent conditions while excavation proceeds. Support may be needed where excavation affects neighboring property, streets, foundations or existing structures. Its design must consider site-specific soil and structural conditions.
Start with the DOB Permit Types and Certificates of Operation directory for the complete work-type list, or use the Department of Buildings Table of Content for wider NYC DOB subjects. Check the work scope and responsible applicant before treating an application as an issued authorization.
What Is a Support of Excavation Permit?
A Support of Excavation (SE) permit addresses temporary systems used to retain soil or stabilize adjacent conditions while excavation proceeds.
Systems can include sheet piling, bracing, shoring or other engineered earth-retention methods appropriate to the excavation.
Need help with Support of Excavation Permit coordination?
SLK Buildings can help property owners and project teams identify the correct DOB record, organize available project documents, and coordinate next steps with the responsible applicants, contractors and licensed professionals.
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When Does This DOB Authorization Apply?
Deciding whether this authorization applies requires a property-specific review of the proposed work, the existing conditions and the current agency records. In particular, compare excavation and shoring plans, elevations and sequence, along with soil and subsurface information, adjacent-property survey.
Support of Excavation addresses systems that help retain soil and protect nearby conditions while excavation proceeds. An SE system can involve shoring, bracing, or other engineered arrangements, depending on site and subsurface conditions. Compare the proposed excavation with nearby foundations, utilities, and property boundaries. The permanent foundation may require an FO filing and the soil movement an EA filing; neither automatically replaces the temporary support authorization. The responsible professional should establish the relationship of those drawings before work begins.
Work Type, Agency and Permit Boundaries
SE is distinct from Earthwork and Foundation. DOB’s Foundation FAQ explains that SE cannot be combine filed with FO because of its separate technical review process.
DOB NOW: Build is the standard current filing platform for this subject. The authorized filer and contractor roles depend on the regulated work, and separate agency permissions may still be necessary.
Steps to Request or Review the DOB Authorization
Use the following sequence to avoid applying against the wrong property record or work scope:
- Confirm the building address, Building Identification Number (BIN), and existing job or equipment record. Check whether the project is new work or an older open job.
- Define the exact work or certificate need with the authorized professional. Compare the project details with the DOB work type and any separate trade or agency approvals.
- The authorized professional prepares the SE filing in DOB NOW for DOB’s applicable review, and the contractor obtains the proper work permit before support installation.
- Review the submitted filing and DOB status. Address objections, missing documents, required attestations and pre-permit conditions through the authorized applicant.
- Confirm the issued permit or certificate and the approved work limitations before acting. Save the final record and track inspection or completion duties.
Documents and Information to Prepare
The responsible applicant should assemble project-specific information before starting the filing or records review:
- Excavation and shoring plans, elevations and sequence.
- Soil and subsurface information, adjacent-property survey.
- Monitoring or protection details for neighboring structures.
- Associated EA, FO and GC filings and responsible engineer information.
DOB Review, Inspections and Closeout
Monitor installation and performance under the required project procedures. Modification or removal of supports should be coordinated with the design professional and authorized construction sequence.
An application marked approved, a permit issued and a project signed off are different milestones. Review the applicable status in DOB NOW or BIS, and retain supporting inspection and closeout documentation for the property record.
Before excavation advances, maintain the approved SE drawings, installation sequence, and any applicable site monitoring or inspection records. Changes in depth, soil conditions, or adjacent-building observations can require the designer to reassess the support method. Keep the records for SE separate from Earthwork and Foundation, while cross-referencing related job numbers. This helps the owner or contractor understand which approval covers the temporary systems and which covers the permanent building work.
Common Problems to Avoid
SE omitted from excavation planning
Assess adjacent-property and soil-support needs before digging.
Improperly combined with Foundation
DOB requires separate treatment of SE from FO.
Shoring changed in the field
Reassess engineering and permit changes before using a different support method.
How SLK Buildings May Assist
SLK Buildings may assist with Support of Excavation Permit coordination by reviewing available DOB records, organizing project information and identifying which applicant, licensed contractor or agency contact needs to handle the next action.
The authorized design and trade professionals remain responsible for regulated submissions and work, and DOB controls permit decisions, inspections and completion. Owners can begin by gathering the property address, existing filing numbers and a clear description of the proposed work.
Frequently Asked Questions
Is SE the same as Earthwork?
No. EA addresses earth-moving activity; SE addresses excavation-support systems.
Can SE be combine filed with FO?
DOB states SE and FO cannot be combine filed.
Who should design excavation support?
The applicable qualified design professional is responsible under the relevant DOB requirements.
Seeking Professional Guidance on NYC DOB Permits and Certificates
Property owners and project teams may need to confirm which DOB authorization applies, distinguish historical permits from current work types, and organize existing drawings, job numbers and approved records. When permits, certificates or multiple trades are involved, the responsible professionals and DOB must determine the permitted scope and required approvals.
SLK Buildings Assists with NYC DOB Permit Coordination
SLK Buildings may help identify the agency process, organize available records, coordinate with owners, contractors and licensed design professionals, and track outstanding requests within an agreed scope. For a project-specific discussion, provide the property address, known job or permit numbers, existing approvals and the work being proposed.
SLK Buildings is an independent consulting and construction-management firm, not affiliated with NYC DOB or any government agency. Information is for general education and is not legal, architectural, engineering or other licensed-professional advice. Qualified providers must perform regulated services. DOB and other agencies control official determinations, and SLK does not guarantee permits, certificates, inspections, approvals or outcomes.