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NYC Department of Buildings · Owner guide
NYC DOB Foundation Permit and Requirements
A Foundation (FO) permit addresses regulated construction of foundations such as shallow footings, deep foundations, retaining walls, anchors or underpinning work. The foundation scope should be identified early in building construction or a structural renovation, particularly where work affects supporting soil or an existing neighboring structure.
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 Foundation Permit?
A Foundation (FO) permit addresses regulated construction of foundations such as shallow footings, deep foundations, retaining walls, anchors or underpinning work.
DOB also states that a Support of Excavation filing cannot be combined with Foundation because SE has a separate technical review path.
Need help with Foundation 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 foundation drawings, elevations and load/support information, along with soil or geotechnical findings where applicable.
Foundation work should be reviewed alongside the excavation and temporary support strategy, not only as a drawing of footings and piles. A FO filing addresses the permanent building foundation scope; earth-moving activities and temporary systems retaining adjacent soil may require EA or SE submissions. The applicant should map those different responsibilities before work starts. Changes to foundation depth, layout, or construction methods can influence the sequencing and technical documents for related filings.
Work Type, Agency and Permit Boundaries
Foundation work is distinct from Earthwork and Support of Excavation. DOB’s Foundation FAQ says underpinning belongs to FO and cannot be combined with another work type in the same underpinning filing.
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 RDP prepares the appropriate FO filing in DOB NOW. The permit holder then meets approved site and contractor conditions before foundation construction.
- 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:
- Foundation drawings, elevations and load/support information.
- Soil or geotechnical findings where applicable.
- Underpinning or adjacent-building protection details.
- Linked New Building, GC, EA or SE filing numbers and plan status.
DOB Review, Inspections and Closeout
Keep foundation inspections and related technical reports coordinated with the building’s structural sequence. Approvals for site excavation do not automatically sign off the foundation work.
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.
Use an approved drawing register to match the permanent foundation plans, related subsurface information, and inspection reports to the correct DOB job. If construction exposes conditions that differ from the assumed design, refer the issue to the responsible professional before altering the work. Check whether any revisions require updated drawings or additional review. Closeout should document the status of the foundation work itself, not merely the status of the excavation or support permits used earlier in the project.
Common Problems to Avoid
Underpinning misclassified
DOB identifies underpinning as a Foundation filing.
Assuming every earthwork permit covers footings
FO and EA are separate work types.
Missing adjacent-building coordination
Identify monitoring, access and protective measures with the responsible design team.
How SLK Buildings May Assist
SLK Buildings may assist with Foundation 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 Foundation the same as Earthwork?
No. They are separate DOB work types with different scopes.
Can underpinning be combined with another work type?
DOB guidance places underpinning in a distinct FO filing and restricts other selections.
Can FO combine with SE?
No. DOB explains that SE receives separate technical review.
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.