Maryland · 31 covered places · 74 ZIP codes
Plumbers in Baltimore County, MD
We cover 31 cities and towns in Baltimore County, Maryland, across 74 ZIP codes, including Baltimore, Parkville, Owings Mills. About 1,408,000 people live in those ZIP codes. 50% of the homes were built before 1960, so galvanized pipe and old cast iron drains are common.
| Year built | Share of homes |
|---|---|
| Before 1940 | 23% |
| 1940–1959 | 27% |
| 1960–1979 | 21% |
| 1980–1999 | 18% |
| 2000 or later | 12% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
| Place | Residents in covered ZIPs | Built before 1960 |
|---|---|---|
| Baltimore | 593,132 | 67% |
| Parkville | 65,010 | 45% |
| Owings Mills | 61,337 | 11% |
| Dundalk | 58,935 | 68% |
| Gwynn Oak | 49,599 | 52% |
| Catonsville | 49,417 | 41% |
| Towson | 46,065 | 37% |
| Essex | 43,536 | 42% |
| Middle River | 42,936 | 29% |
| Nottingham | 39,653 | 15% |
What goes wrong in Baltimore County homes
Pre-1960 homes: galvanized pipe and cast iron
50% of homes in Baltimore County's covered ZIP codes were built before 1960, 23% of them before 1940. Houses that old often still have galvanized steel supply lines that rust closed from the inside, and cast iron or clay sewer pipe that cracks and lets roots in. Weak pressure at upstairs fixtures, brown water after a shutoff and slow drains are the usual clues. Typical fixes are whole-house repiping and a sewer camera inspection.
Natural gas in most homes
58% of occupied homes here heat with utility gas, so gas water heaters, ranges and dryers are common. That means gas line extensions for new appliances, flexible connector replacements and venting checks when a water heater is swapped. If you smell gas, leave first and call the gas utility from outside. See gas line repair.
Apartments, condos and attached homes
Only 31% of homes here are single-family detached houses. In attached buildings a leak or clog often involves a shared stack or a neighbor's unit, so it's worth knowing which lines are yours and which belong to the building or HOA, and where your unit's own shutoff is.
Winter freezes
70% 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 Baltimore County
City pages in Baltimore County
Other covered towns in Baltimore County
- Brooklandville (1 ZIP)
- Brooklyn (1 ZIP)
- Catonsville (1 ZIP)
- Cockeysville (1 ZIP)
- Curtis Bay (1 ZIP)
- Dundalk (1 ZIP)
- Essex (1 ZIP)
- Fort Howard (1 ZIP)
- Gwynn Oak (1 ZIP)
- Halethorpe (1 ZIP)
- Hunt Valley (2 ZIPs)
- Kingsville (1 ZIP)
- Lutherville Timonium (2 ZIPs)
- Middle River (1 ZIP)
- Nottingham (1 ZIP)
- Owings Mills (1 ZIP)
- Parkville (1 ZIP)
- Perry Hall (1 ZIP)
- Pikesville (3 ZIPs)
- Randallstown (1 ZIP)
- Reisterstown (1 ZIP)
- Riderwood (1 ZIP)
- Rosedale (1 ZIP)
- Sparrows Point (1 ZIP)
- Stevenson (1 ZIP)
- Towson (5 ZIPs)
- Upper Falls (1 ZIP)
- White Marsh (1 ZIP)
- Windsor Mill (1 ZIP)
- Woodstock (1 ZIP)
Baltimore County plumbing FAQ
Which towns in Baltimore County do you cover?
31 places: Baltimore, Brooklandville, Brooklyn, Catonsville, Cockeysville, Curtis Bay, Dundalk, Essex, Fort Howard, Gwynn Oak, Halethorpe, Hunt Valley, Kingsville, Lutherville Timonium, Middle River, Nottingham, Owings Mills, Parkville, Perry Hall, Pikesville, Randallstown, Reisterstown, Riderwood, Rosedale, Sparrows Point, Stevenson, Towson, Upper Falls, White Marsh, Windsor Mill, Woodstock. Enter your ZIP code to confirm coverage for your street.
How old are homes in Baltimore County?
Across the covered ZIP codes, Census estimates put 50% of homes as built before 1960, 21% from 1960 to 1979, 18% from 1980 to 1999 and 12% in 2000 or later.
Who licenses plumbers in Baltimore 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 Baltimore County, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Baltimore County?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.