Nashua Building Department | Permits, Inspections & Contact

The City of Nashua Department of Building Safety accepts and reviews building, mechanical, electrical, and plumbing plans and conducts inspections on permitted work. The department applies New Hampshire’s state building-code framework together with Nashua’s local ordinances. This is a municipal authority for addresses inside Nashua, not a Hillsborough County permit office.

Nashua building permits and plan review

Residential applications may be submitted electronically by email to the department, by mail, through the City Hall drop box, or in person. Commercial applications require paper and electronic plan sets according to the department’s current instructions. Permit applicants should confirm the required plans, signatures, trade permits, and fees with Building Safety before work starts.

Inspections and certificate of occupancy

Request a Nashua building inspection through the department’s request form, by email to permits@nashuanh.gov, or by calling (603) 589-3080. Nashua asks callers to have the project number, property address, and inspection type available. The City’s FAQ states that residential certificates of occupancy require final building approvals and may require DPW or engineering sign-off; commercial projects may additionally require Planning and Zoning, Fire Marshal, DPW Engineering, and Health Department approvals.

Codes, zoning, and occupancy

Building permits authorize code-regulated construction; they do not replace zoning or land-use approvals. Confirm the property’s Nashua zoning requirements and any change-of-use review before filing. The department states that New Hampshire’s updated 2021 code editions took effect December 31, 2024, with state amendments published by the New Hampshire State Fire Marshal.

Official contact information

Nashua Building Safety is located at 229 Main Street, second floor of City Hall, Nashua, New Hampshire 03060. The public phone is (603) 589-3080. Nashua’s current department page describes email, mail, drop-box, and in-person permit submittals rather than a separate public building-permit portal, so applicants should use the official instructions before sending plans.