A plumbing inspector is the code-enforcement professional who checks installed plumbing against the plumbing code a city, county or state enforces — the government-side counterpart to the plumber who installed the work.
This guide covers what the job involves, who employs inspectors, the certifications and licences behind the title, what the work pays in the May 2025 federal data, and how plumbers move into it.
What is a plumbing inspector?
A plumbing inspector works on the government side of construction: a city or county building department, a state agency, or a private firm doing that work under contract.
The job is to check installed plumbing against the plumbing code the jurisdiction enforces, and to approve, require correction of, or reject the work based on what the code says.
An inspector doesn't fix plumbing — they judge whether installed plumbing complies.
Two boundary lines keep the title distinct.
A plumbing inspector is not a home inspector: home inspectors are hired by a buyer or seller to assess a home's condition, while code-enforcement inspectors act for the jurisdiction that adopted the plumbing code.
And a plumbing inspector is not the mechanical inspector — ICC certifies mechanical inspectors separately on the M1 and M2 exams, so the HVAC and fuel-gas side of a building is its own discipline.
There is no "plumbing inspector" line in the federal data.
The Bureau of Labor Statistics groups every construction and building inspector — plumbing, electrical, mechanical, plans examiners and the rest — into one occupation, SOC 47-4011 Construction and Building Inspectors, which counted 146,720 wage-and-salary jobs nationally in May 2025.
Every national number you'll read about this job, including everything in this guide, is about that broader group, named as such.
The inspector can also sit inside the trade's own licence ladder — Texas is the clearest example.
The Texas State Board of Plumbing Examiners (TSBPE) issues four plumber licences — Tradesman Plumber-Limited, Journeyman Plumber, Master Plumber and Plumbing Inspector — so there, "plumbing inspector" is literally a licence class, not just a job title.
Plumbing inspections through a project
The through-line of the job is code compliance.
The inspector reviews the work and compares what was built against the plumbing code the jurisdiction adopted — for ICC-based jurisdictions, the International Plumbing Code.
What "the work" covers comes through in the scope ICC publishes for its commercial certification: the P2 Commercial Plumbing Inspector covers commercially installed plumbing systems, storm water systems, special waste systems, and non-flammable medical and non-medical oxygen piping, checked for compliance with the International Plumbing Code.
The certifications mirror the field's residential/commercial split: ICC's P1 Residential Plumbing Inspector and P2 Commercial Plumbing Inspector are separate exams for the two sides of the market, and ICC currently offers its inspector exams on the 2021 and 2024 code editions.
How inspections sequence through a project — which checkpoints happen when, what notice the contractor gives, what a re-inspection looks like — is set by each jurisdiction's adopted code and permit process, and it varies.
Our research covers the certifications and the federal job data, not each city's inspection sequence, so we won't generalize it.
The building department that permits a project is the authority on how it gets inspected.
Inspection rules are local — verify with the building department
Who employs plumbing inspectors?
Local government is the biggest single employer group: 53,640 construction and building inspectors worked in local government, excluding schools and hospitals, in May 2025.
Next comes architectural, engineering, and related services, at 47,310, with 5,890 more in other professional, scientific, and technical services.
The city-hall image overstates the concentration, though: 53,640 is well under half of the occupation's 146,720 jobs, so most inspectors work outside local government.
The jobs follow construction.
By state, the most inspector jobs in May 2025 were in Texas (18,230), Florida (13,860), California (13,420), New York (11,160) and Virginia (6,550).
By metro area: New York-Newark-Jersey City (10,340), Dallas-Fort Worth-Arlington (5,450) and Houston-Pasadena-The Woodlands (4,980) lead the list.
Which employer you sit under changes the job — the jurisdiction you cover, the pay structure, the career ladder — and the split between state-agency and city-or-county work is its own topic.
If you're job-hunting rather than comparing employers, the plumbing inspector jobs on HVACHires collect open positions.
Plumbing inspector requirements
There is no single national licence for plumbing inspectors — the requirements are set by whoever does the hiring: a city or county building department, a state agency, or a private inspection firm.
What the industry has standardized is the certification layer, and two bodies publish it.
ICC — the International Code Council — publishes the inspector certification line the two plumbing exams sit in: P1 Residential Plumbing Inspector and P2 Commercial Plumbing Inspector, offered on the 2021 and 2024 code editions, alongside the plans-examiner and fuel-gas exams (P3 Plumbing Plans Examiner, FG Fuel Gas Inspector) and the mechanical M-series.
On format, ICC's published outline for P1 lists 60 multiple-choice questions with a 2-hour, open-book limit, and P2 is listed at 50 questions, 2 hours, open book.
Those outlines are dated, so confirm the current format in ICC's exam catalog before you book.
The full exam-by-exam detail belongs in our guide to how to become a plumbing inspector.
ASSE International maintains a parallel standards series: ASSE Series 16000 (2019, reaffirmed 2025) covers 16010 Plumbing Inspector, 16020 Mechanical Inspector, 16040 Plumbing Plan Examiner and 16050 Mechanical Plans Examiner.
Licensing can run through the state as well.
Texas's TSBPE licences include Plumbing Inspector as a class alongside Journeyman and Master Plumber.
And upkeep can be inspector-specific: the Maryland State Board of Plumbing requires 8 hours of continuing education each calendar year for plumbing inspectors only — plumbers aren't covered by that requirement.
What we can't generalize is the hiring screen itself — how much field experience a given department wants, whether a journeyman card is expected, which certification is mandatory at hire.
Our research did not confirm typical plumbing-inspector hiring requirements, so read each posting closely and ask the hiring department what it accepts.
Requirements are set by the hiring jurisdiction — verify before you apply
How much does a plumbing inspector make?
Start with the honest caveat: BLS publishes no wage for "plumbing inspector" as a title.
Federal data groups every construction and building inspector — plumbing, electrical, mechanical and the rest — into SOC 47-4011 Construction and Building Inspectors, so the numbers below are that broader group, named as such, not a plumbing-specific figure.
In the May 2025 OEWS release (published May 15, 2026), the group's national median wage was $74,690 a year, or $35.91 an hour.
The mean was higher, at $77,730 a year ($37.37 an hour).
The middle half earned between $58,860 and $94,710 a year.
Pay runs highest in a handful of states and metros.
By annual median wage, the top-paying states were Alaska ($102,410), California ($101,290) and Connecticut ($98,670).
Among metro areas, San Jose-Sunnyvale-Santa Clara, CA led at $129,750, followed by San Francisco-Oakland-Fremont, CA ($125,130) and Santa Maria-Santa Barbara, CA ($112,550), with Vallejo, CA ($108,180) and Anchorage, AK ($106,780) closing BLS's top five.
Industry matters too: the highest median pay sat in utility niches — electric power generation, transmission and distribution ($107,460), oil and gas extraction ($107,090) and natural gas distribution ($105,630) — small niches, not typical jobs.
The outlook is flat but steady.
BLS's Employment Projections for 2025 to 2035 put the occupation at 153.9k jobs in both years — a projected change of 0.0%, against an all-occupation average growth of 3.5%.
That projections count includes the self-employed, so it sits alongside the 146,720 wage-and-salary figure rather than matching it.
Because the occupation is large, turnover alone keeps the volume up: an average of 14,800 openings per year through 2035.
As for benefits, our research has no sourced figures for this occupation.
Benefits follow the employer, and the employer mix here ranges from city departments to private engineering firms, so compare postings directly.
For the full pay tables — every state, both statistics — see our plumbing inspector salary page.
Moving from plumber to plumbing inspector
The move makes sense structurally: the inspector's whole job is judging trade work, so the field knowledge a plumber already carries is the asset the job runs on.
What varies is the screen each employer applies — the certifications, experience and licence expectations in the requirements section above — and that screen belongs to the hiring jurisdiction, not to a national rule.
Pay context helps the decision.
The inspector occupation's median, $74,690 a year in May 2025, sits above the plumbers' own category — Plumbers, Pipefitters, and Steamfitters (SOC 47-2152), median $63,800 — but both numbers are broad categories, not title-specific wages, so treat the gap as directional rather than a promise.
In Texas, the ladder itself makes room for the move: Plumbing Inspector is the fourth licence class TSBPE issues alongside Tradesman, Journeyman and Master Plumber.
And inspection is one of several ways plumbers move off the tools without leaving the trade — the work keeps you on job sites and in the code, minus the physical toll of installations.
When you're ready to make the jump, the plumbing inspector jobs on HVACHires are where open positions land.
Career information, not legal advice — licensing, certification and hiring requirements are set by your state licensing board or the city and county where you'd work. Confirm the current rules with that authority before you act on them.