How much does a building permit cost in Town of Merrimack, NH?

The minimum permit fee is $35 non-refundable application fee per permit. Fees are calculated as: Square-footage-based for 1 and 2 family residential. New construction and additions (occupied space), interior alterations, finished basements, renovations: $0.68/sq ft. Accessory structures (porches, decks, sheds): $0.68/sq ft.. Plan check fee: Included; see fee schedule.

How do I apply for a building permit in Town of Merrimack, NH?

1. Owner retains designer/engineer for project as needed. 2. Prepare construction plans and required documentation. 3. Create account and submit application online through OpenGov portal. 4. Submit required number of construction plans with application. 5. Obtain all necessary permits (building, electrical, plumbing, mechanical) before starting construction. 6. Pay fees; $35 non-refundable application fee due with each permit. 7. Building Division and other applicable departments review and approve via CO Check List. 8. Conduct inspections at required stages. 9. Obtain Certificate of Occupancy or Certificate of Compliance upon successful final inspection.

How long does it take to get a building permit in Town of Merrimack, NH?

Typical processing time is Not specified; contact Building Code Enforcement at (603) 420-1730..

How do I schedule a building inspection in Town of Merrimack, NH?

Inspections can be scheduled via: OpenGov portal, (603) 420-1730.

City Building Permits

Town of Merrimack, NH - 2026 Building Permit Guide

How to apply for a building permit in Town of Merrimack, New Hampshire. Permit authority, application steps, fees, and inspection requirements.

New Hampshire Hillsborough County Updated March 2026

Permit Authority

Town of Merrimack; handles building permits, health licenses, and code inspections.

Department: Building Code Enforcement and Inspectional Services Division (part of Merrimack Fire and Rescue Department)
Address: 432 Daniel Webster Highway, Merrimack, NH 03054
Phone: (603) 420-1730
Email: building@merrimacknh.gov
Website: https://www.merrimacknh.gov/fire-and-rescue-department/building-code-enforcement-division

Online Permit Portal

Open Merrimack Building Permit Applications (OpenGov)

Platform: OpenGov • Account required: Yes • Submission: In-person only

Additional resources:

Application Process

Owner retains designer/engineer for project as needed.
Prepare construction plans and required documentation.
Create account and submit application online through OpenGov portal.
Submit required number of construction plans with application.
Obtain all necessary permits (building, electrical, plumbing, mechanical) before starting construction.
Pay fees; $35 non-refundable application fee due with each permit.
Building Division and other applicable departments review and approve via CO Check List.
Conduct inspections at required stages.
Obtain Certificate of Occupancy or Certificate of Compliance upon successful final inspection.

Typical processing time: Not specified; contact Building Code Enforcement at (603) 420-1730.

Source: Building Code Enforcement and Inspectional Services Division (part of Merrimack Fire and Rescue Department)

General Requirements

Permit required for all new construction, additions, remodels, finished basements, accessory structures, and other significant work. Separate permits required for electrical, plumbing, and mechanical systems.

Required Documents

Construction plans (number of sets per project type)
Site plan
Energy code compliance documentation
Licensed contractor credentials

Permit validity: Not specified on public pages; contact Building Code Enforcement.
Building code: NH State Building Code; effective January 1, 2025 per new fee schedule. Reference HB 1681 (2021 code suite).
Owner-builder: Not specified on public pages; contact building@merrimacknh.gov.
Contractor requirements: NH state licenses required for electrical, plumbing, and gas work.

Fees

Minimum permit fee: $35 non-refundable application fee per permit
Plan check fee: Included; see fee schedule
Permit fee formula: Square-footage-based for 1 and 2 family residential. New construction and additions (occupied space), interior alterations, finished basements, renovations: $0.68/sq ft. Accessory structures (porches, decks, sheds): $0.68/sq ft.
Reinspection fee: Not specified; contact Building Code Enforcement at (603) 420-1730
Payment note: Payments accepted online through OpenGov portal; contact (603) 420-1730

Fees change. Verify current amounts at the official fee schedule (effective January 1, 2025).

Work That Does NOT Require a Permit

Contact the Building Code Enforcement and Inspectional Services Division (part of Merrimack Fire and Rescue Department) to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

OpenGov portal (online)
(603) 420-1730 (phone)

Inspection hours: Contact Building Code Enforcement for current inspection hours.

Typical inspection sequence: Inspections conducted as needed; prior to building permit issuance or occupancy, Building Division and other applicable departments must sign off on CO Check List.

Additional Resources

Building code: NH State Building Code; effective January 1, 2025 per new fee schedule. Reference HB 1681 (2021 code suite).
Zoning information: View zoning info
License lookup guide: New Hampshire Contractor License Requirements
Contract template: New Hampshire Homeowner-Contractor Agreement
New Hampshire hub: New Hampshire Contractor License & Permit Hub

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Building Code Enforcement and Inspectional Services Division (part of Merrimack Fire and Rescue Department) before applying.

Frequently Asked Questions

Town of Merrimack Building Permit FAQ

Do I need a building permit in Town of Merrimack, NH?: Permit required for all new construction, additions, remodels, finished basements, accessory structures, and other significant work. Separate permits required for electrical, plumbing, and mechanical systems.
How much does a building permit cost in Town of Merrimack, NH?: The minimum permit fee is $35 non-refundable application fee per permit. Fees are calculated as: Square-footage-based for 1 and 2 family residential. New construction and additions (occupied space), interior alterations, finished basements, renovations: $0.68/sq ft. Accessory structures (porches, decks, sheds): $0.68/sq ft.. Plan check fee: Included; see fee schedule.
How do I apply for a building permit in Town of Merrimack, NH?: 1. Owner retains designer/engineer for project as needed. 2. Prepare construction plans and required documentation. 3. Create account and submit application online through OpenGov portal. 4. Submit required number of construction plans with application. 5. Obtain all necessary permits (building, electrical, plumbing, mechanical) before starting construction. 6. Pay fees; $35 non-refundable application fee due with each permit. 7. Building Division and other applicable departments review and approve via CO Check List. 8. Conduct inspections at required stages. 9. Obtain Certificate of Occupancy or Certificate of Compliance upon successful final inspection.
How long does it take to get a building permit in Town of Merrimack, NH?: Typical processing time is Not specified; contact Building Code Enforcement at (603) 420-1730..
How do I schedule a building inspection in Town of Merrimack, NH?: Inspections can be scheduled via: OpenGov portal, (603) 420-1730.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.