Plumbing Inspection in Rockville, MD
19% of owner-occupied homes in Rockville have changed hands since 2018. That is an ordinary rate, which makes the ordinary mistake more likely: assuming the inspection covered the plumbing.
The one-paragraph answer
19% of owners in Rockville bought in 2018 or later, an ordinary rate. Ordinary is where the usual mistake happens, which is assuming the inspection covered the plumbing: the buried lateral is excluded by both published standards.
Source: US Census Bureau, American Community Survey 5-year estimates, table B25038.
When Rockville moved in
An average rate hides two different populations: recent buyers with a report, and long-standing owners without one. The advice for the two is not the same.
| Owner households in Rockville | Share of all owners |
|---|---|
| Moved in 2021 or later | 5% |
| Moved in 2018–2020 | 14% |
| Moved in 2010–2017 | 27% |
| Moved in before 2010 | 54% |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25038 (tenure by year householder moved into unit), 2023 release. Universe: 57,555 occupied housing units, of which 30,970 are owner-occupied. This counts when the CURRENT occupant moved in, so it measures recent moves as a share of the housing stock — not a rate of sales per year.
What the inspection will not cover
The water heater is covered in some detail by both standards — and InterNACHI is equally explicit that nobody is required to measure its capacity, temperature or adequacy, or to test the relief valve. It is looked at, not operated.
Source: InterNACHI Home Inspection Standards of Practice; ASHI Standard of Practice.
What it is required to cover
The covered list is shorter than the excluded one and it is not thin. Every fixture run, every toilet flushed, the drain-waste-vent system described, the water heater and its venting examined, the shut-offs located. That is a real morning of work and it is worth knowing it happened.
The full list of obligations is published here. Reading it once is what stops a standard note from looking like a finding.
What to do about it
Ask a contractor what would have to be opened up to answer the question, rather than asking for a number. A quote given without that step is a guess with a figure attached to it.
Everything above comes from documents you can read yourself: the exclusions, the requirements, and why a camera down the lateral is never part of it.
Other Maryland towns we route in
- Davidsonville 13% of owners moved in since 2018
- Hancock 22% of owners moved in since 2018
- Riva 14% of owners moved in since 2018
- Gaithersburg 18% of owners moved in since 2018
- Funkstown 11% of owners moved in since 2018
Checking a plumber in Maryland
Checking a credential in Maryland
Maryland licenses are issued by the Maryland State Board of Plumbing, Department of Labor, which publishes a public search you can use before work begins.
Inspection report in front of you?Read us the plumbing lines and nothing else — we do not want the document. We will route you to a contractor covering your area who can quote the items on it, and you are never charged by us. Not only inspection items: Rockville gets routed whatever is needed.
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