How do I verify a Plumbing Contractor license in New Hampshire?

Call TradesAPI's GET /verify with state=NH, the license number, and trade=plumbing to get a normalized result — valid/invalid, status, expiration, and any disciplinary actions — in one request. You can also search the official New Hampshire board portal by hand.

What comes back for a New Hampshire plumbing contractor license?

The normalized /verify result: whether the license is valid, its current status and expiration date, and any disciplinary actions the New Hampshire board publishes — the same schema as every other state and trade.

Is New Hampshire plumbing contractor license data free to check?

The New Hampshire board's public portal is free to search manually. TradesAPI adds a single normalized API across all 50 states plus DC — every new API key includes 50 free verifications.

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New Hampshire · Plumbing Contractor license lookup

How to verify plumbing contractor licenses in New Hampshire

Check any New Hampshire plumbing contractor license — status, expiration, and disciplinary history — through one normalized API, or look it up by hand on the state board portal.

New Hampshire coverage: Operational · live status

What you can verify

Trade: Plumbing Contractor

Data source: Real-time portal check

Coverage: Electricians, Plumbers (no state GC)

Looking for a different New Hampshire trade, or the same trade in another state? See the full New Hampshire license guide or the national Plumbing Contractor lookup by state.

One call. The whole picture.

The /verify response is identical in shape across every state and trade, so your integration code never changes per jurisdiction:

GET /verify?state=NH&license=SAMPLE-12345&trade=plumbing

{
  "valid": true,
  "name": "SAMPLE CONTRACTING LLC",
  "license_number": "SAMPLE-12345",
  "trade": "plumbing",
  "expiration": "05/12/2027",
  "status": "Active",
  "state": "NH",
  "disciplinary_actions": [],
  "source_url": "https://forms.nh.gov/licenseverification/Search.aspx",
  "cached": false,
  "checked_at": "2026-08-09T08:00:00Z"
}

Example response showing the normalized schema. Wire it up against deterministic fixtures in the sandbox — no credit cost.

Verify New Hampshire plumbing contractor licenses programmatically

# Verify a New Hampshire plumbing contractor license with one API call
curl -H "X-API-Key: YOUR_KEY" \
  "https://www.tradesapi.com/verify?state=NH&license=SAMPLE-12345&trade=plumbing"

The official New Hampshire board portal is at https://forms.nh.gov/licenseverification/Search.aspx — free to search plumbing contractor licenses by hand. TradesAPI wraps it (and every other state) in one API so you don't maintain 51 different scrapers.

Start verifying in minutes

Every new API key includes 50 free verifications across all 50 states + DC, plus hosted MCP access for Claude, Cursor, and any MCP-speaking agent. No credit card to start.

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Frequently asked questions

How do I verify a Plumbing Contractor license in New Hampshire?: Call TradesAPI's GET /verify with state=NH, the license number, and trade=plumbing to get a normalized result — valid/invalid, status, expiration, and any disciplinary actions — in one request. You can also search the official New Hampshire board portal by hand.
What comes back for a New Hampshire plumbing contractor license?: The normalized /verify result: whether the license is valid, its current status and expiration date, and any disciplinary actions the New Hampshire board publishes — the same schema as every other state and trade.
Is New Hampshire plumbing contractor license data free to check?: The New Hampshire board's public portal is free to search manually. TradesAPI adds a single normalized API across all 50 states plus DC — every new API key includes 50 free verifications.