Maryland · 19 covered places · 24 ZIP codes
Plumbers in Frederick County, MD
We cover 19 cities and towns in Frederick County, Maryland, across 24 ZIP codes, including Frederick, New Market, Middletown. About 257,000 people live in those ZIP codes. Most homes date from 1980 to 1999, old enough that original water heaters, valves and drains are wearing out.
| Year built | Share of homes |
|---|---|
| Before 1940 | 11% |
| 1940–1959 | 7% |
| 1960–1979 | 16% |
| 1980–1999 | 35% |
| 2000 or later | 32% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
| Place | Residents in covered ZIPs | Built before 1960 |
|---|---|---|
| Frederick | 150,170 | 16% |
| New Market | 16,515 | 4% |
| Middletown | 12,695 | 19% |
| Thurmont | 11,919 | 31% |
| Walkersville | 10,914 | 19% |
| Monrovia | 7,815 | 3% |
| Ijamsville | 7,439 | 14% |
| Brunswick | 6,757 | 33% |
| Emmitsburg | 6,079 | 30% |
| Jefferson | 5,740 | 19% |
What goes wrong in Frederick County homes
1980s and 90s construction and polybutylene
35% of homes were built between 1980 and 1999. Polybutylene supply pipe was installed widely in US homes from about 1978 to 1995, so houses from these years are worth checking for gray plastic pipe stamped PB2110, usually visible at the water heater or under sinks. Insurers and buyers often ask about it. See polybutylene replacement.
Oil-heated homes
8% of occupied homes here heat with fuel oil, far above the national norm. Many of them make hot water with a tankless coil inside the boiler, which runs the boiler all summer. Plumbers often replace the coil with an indirect tank or a standalone water heater when the boiler is serviced or replaced.
Winter freezes
34% of homes here were built before 1980, when pipes were more often run through exterior walls and uninsulated crawl spaces. In a cold Maryland winter those are the lines that freeze and split. See frozen and burst pipe repair.
Common plumbing work in Frederick County
City pages in Frederick County
Other covered towns in Frederick County
- Adamstown (1 ZIP)
- Braddock Heights (1 ZIP)
- Brunswick (1 ZIP)
- Buckeystown (1 ZIP)
- Burkittsville (1 ZIP)
- Emmitsburg (1 ZIP)
- Ijamsville (1 ZIP)
- Jefferson (1 ZIP)
- Knoxville (1 ZIP)
- Libertytown (1 ZIP)
- Middletown (1 ZIP)
- Monrovia (1 ZIP)
- Myersville (1 ZIP)
- New Market (1 ZIP)
- Point Of Rocks (1 ZIP)
- Thurmont (1 ZIP)
- Walkersville (1 ZIP)
- Woodsboro (1 ZIP)
Frederick County plumbing FAQ
Which towns in Frederick County do you cover?
19 places: Adamstown, Braddock Heights, Brunswick, Buckeystown, Burkittsville, Emmitsburg, Frederick, Ijamsville, Jefferson, Knoxville, Libertytown, Middletown, Monrovia, Myersville, New Market, Point Of Rocks, Thurmont, Walkersville, Woodsboro. Enter your ZIP code to confirm coverage for your street.
How old are homes in Frederick County?
Across the covered ZIP codes, Census estimates put 18% of homes as built before 1960, 16% from 1960 to 1979, 35% from 1980 to 1999 and 32% in 2000 or later.
Who licenses plumbers in Frederick County, MD?
The Maryland State Board of Plumbing licenses plumbers and gas fitters; check a license through the Maryland Department of Labor.
Housing and heating figures are US Census Bureau ACS 2023 5-year estimates for the ZIP code areas we cover in Frederick County, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Frederick County?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.