Plumbing Inspection in Derwood, MD
17% of owner-occupied homes in Derwood 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
17% of owners in Derwood 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 Derwood moved in
At an ordinary rate of turnover, the housing here divides fairly evenly between homes inspected in the last few years and homes that have not been looked at since the previous sale, whenever that was.
| Owner households in Derwood | Share of all owners |
|---|---|
| Moved in 2021 or later | 6% |
| Moved in 2018–2020 | 11% |
| Moved in 2010–2017 | 25% |
| Moved in before 2010 | 58% |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25038 (tenure by year householder moved into unit), 2023 release. Universe: 6,042 occupied housing units, of which 4,709 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
Visual means visual. Pipe inside a wall, under a slab or below grade is not observed, and neither standard asks anyone to open a sealed access panel to reach it. InterNACHI names polybutylene piping in its exclusions outright.
Source: InterNACHI Home Inspection Standards of Practice; ASHI Standard of Practice.
What it is required to cover
Both standards cover the interior drain, waste and vent system, and ASHI asks for the predominant material of the service, distribution and DWV pipes to be described. A report naming one material is describing the majority of the house, not every run in it.
The full covered list, and why the distinction between the two lists is the whole of reading a report properly.
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.
Ten minutes of reading covers it: what nobody was required to look at, what they were, and the drain run that is a separate instruction altogether.
Other Maryland towns we route in
- Keedysville 18% of owners moved in since 2018
- Dickerson 19% of owners moved in since 2018
- Windsor Mill 19% of owners moved in since 2018
- Middletown 20% of owners moved in since 2018
- North East 25% 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. We take Derwood requests that never appeared on any inspection.
Call (888) 764-3501