New Hampshire renewal guide
Mechanical Business Entity License
If this license is up for renewal, this page gives you the fee, the timeline, and the items that usually hold the filing up.
See this alongside the other 14 New Hampshire license pages we track.
Start here
What matters before you file.
Check the fee, the renewal window, and the documents or insurance records that can slow approval down.
Issuing authority
Renewal period
Every 24 months
Renewal fee
$275.00
Bond requirement
No
Insurance requirement
Yes — General Liability
Last verified
Sep 2026
Before you renew
Get the filing straight.
- 1
Check the insurance certificates
Make sure the required policies are current and match what the board or agency expects before you file.
- 2
File with the board
File through New Hampshire Mechanical Safety and Licensing Board (OPLC) and pay the $275.00 renewal fee once the supporting proof is ready.
Renew online - 3
Leave room for processing
Typical processing time is 30 days, so do not wait until the last minute.
Detailed notes
The fine print is here.
New Hampshire Mechanical Business Entity License
The New Hampshire Mechanical Safety and Licensing Board, under the Office of Professional Licensure and Certification (OPLC), issues the Mechanical Business Entity License under RSA 153:29-a to corporations, partnerships, and limited liability companies engaged in fuel gas fitting and/or plumbing.
Requirements
RSA 153:29-a, V and Mec 307.02 require:
- Proof of good standing with the NH Secretary of State
- Proof of liability insurance, before issuance and at every renewal
- A list of all current licensed employees, with each name as it appears on the license and the NH license number
Individual workers still need their own OPLC licenses (Fuel Gas Piping Installer, Installation Technician, Service Technician, or Journeyman/Master Plumber).
Fees
- License Fee: $275 for a 2-year license — the same fee covers initial licensure, renewal, and reinstatement after expiration, for any number of employees (Plc 1002.25)
- A printed wall certificate costs the actual vendor cost or $20, whichever is less (Plc 1001.10), and a license verification fee is $10 (Plc 1001.15)
Renewal Process
- Renewal Period: Every 2 years (RSA 153:29-a, II); business entity licenses expire on the last day of January (Mec 406.01)
- Renewal Fee: $275
- After Expiration: An entity whose license has not been renewed by the expiration date shall not engage in plumbing or fuel gas fitting until it is renewed (Mec 406.01)
Consequences of Operating Without a License
Unlicensed practice is unlawful practice under RSA 310:13 — the board may fine up to $10,000 for each offense, or the gain from the violation if greater, and may seek an injunction.
*Disclaimer: This information is provided for general reference only and does not constitute legal advice. Always verify current requirements directly with the NH OPLC Mechanical Safety and Licensing Board.*
Official links
Check the board or agency directly.
Required documents
- Business Registration
- government_issued_id
- Proof of Insurance
Rules move. Check New Hampshire Mechanical Safety and Licensing Board (OPLC) again before you pay, renew, or schedule work around this requirement.
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Next steps
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Get reminded 90, 60, and 30 days before your Mechanical Business Entity License expiresPrintable checklist
New Hampshire checklist
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