New Hampshire · 6 covered places · 17 ZIP codes
Plumbers in Hillsborough, NH
We cover 6 cities and towns in Hillsborough, New Hampshire, across 17 ZIP codes, including Manchester, Nashua, Merrimack. About 260,000 people live in those ZIP codes. 35% of the homes were built before 1960, so galvanized pipe and old cast iron drains are common.
| Year built | Share of homes |
|---|---|
| Before 1940 | 22% |
| 1940–1959 | 13% |
| 1960–1979 | 24% |
| 1980–1999 | 29% |
| 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 |
|---|---|---|
| Manchester | 119,954 | 47% |
| Nashua | 91,131 | 30% |
| Merrimack | 27,604 | 7% |
| Goffstown | 14,013 | 22% |
| New Boston | 6,143 | 16% |
| Francestown | 1,347 | 35% |
What goes wrong in Hillsborough homes
Oil-heated homes
22% 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.
Pre-1960 homes: galvanized pipe and cast iron
35% of homes in Hillsborough's covered ZIP codes were built before 1960, 22% 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.
Long, hard winters
59% of homes here were built before 1980, when pipes were more often run through exterior walls and uninsulated crawl spaces. In a long New Hampshire winter those are the lines that freeze and split. See frozen and burst pipe repair.
1980s and 90s construction and polybutylene
29% 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.
Common plumbing work in Hillsborough
City pages in Hillsborough
Other covered towns in Hillsborough
- Francestown (1 ZIP)
- Goffstown (1 ZIP)
- Merrimack (1 ZIP)
- New Boston (1 ZIP)
Hillsborough plumbing FAQ
Which towns in Hillsborough do you cover?
6 places: Francestown, Goffstown, Manchester, Merrimack, Nashua, New Boston. Enter your ZIP code to confirm coverage for your street.
How old are homes in Hillsborough?
Across the covered ZIP codes, Census estimates put 35% of homes as built before 1960, 24% from 1960 to 1979, 29% from 1980 to 1999 and 12% in 2000 or later.
Who licenses plumbers in Hillsborough, NH?
The New Hampshire Mechanical Licensing Board, under the Office of Professional Licensure and Certification, licenses plumbers.
Housing and heating figures are US Census Bureau ACS 2023 5-year estimates for the ZIP code areas we cover in Hillsborough, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Hillsborough?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.