Plumbing repair · Delaware, Ohio
Plumbing repair in Delaware, OH
Leak, backed-up drain, no hot water, or a frozen line? The largest share of Delaware's homes (18%) was built 2010 to 2019[1]. Request a licensed plumber who works here. Delaware, in Delaware County — ZIP 43015, counts 46,636 residents (2025 estimate)[2].
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Delaware plumbing snapshot: the key figures
- Population (2025 est.)
- 46,636[2]+12.9% since 2020
- County
- Delaware[2]
- Land area
- 20.4 sq mi[3]
- Decade the most homes date from
- 2010 to 2019[1]18% of housing units
- Homes built before 1980
- 36%[1]the 7th-lowest share of the 15 Columbus-area suburbs we cover
- Homes built 1980–1999
- 23%[1]2020–2024
- Homes built 2010 or later
- 24%[1]the 4th-highest share of the 15 Columbus-area suburbs we cover
- Winter-storm & freeze days, delaware zone
- 55[4]2016–2025
- Flood & flash-flood reports within 10 mi
- 24[4]6 flash floods, 2016–2025; flood-prone homes need working drainage and backflow prevention
- FEMA flood-insurance claims, local ZIPs
- 42[5]15 in the last 10 years; 35 paid
- Homes on utility gas heat
- 78%[1]gas piping work usually needs a permit and a licensed installer
What the local data means for plumbing in Delaware
Delaware is one of the fastest-growing Columbus-metro suburbs tracked here: 46,636 people (2025 estimate), up 12.9% since 2020[2]. It covers 20.4 square miles (2,285 residents per square mile, the 12th densest), sits entirely in Delaware County, in ZIP code 43015[3].
With 24% of homes built since 2010 and 36% before 1980[1], Delaware's plumbing runs from brand-new supply lines and fixtures to aging pipe, original valves and water heaters past their rated life.
The entire city sits in ZIP code 43015[6].
The closest tracked neighbours are Powell (8.2 mi S), Dublin (12.5 mi S) and Worthington (13.4 mi S)[3].
36% of Delaware's 17,726 housing units predate 1980 and 24% went up in 2010 or later[1] — the 7th-lowest pre-1980 share of the 15 Columbus-area suburbs we cover; nearby, Powell (4%), Dublin (11%), and Worthington (83%) predate 1980. New-construction problems are usually fittings, supply lines, water-heater installs and drain slopes, not worn-out pipe.
The biggest single slice — 18% — was built 2010 to 2019, and the median home dates to 1995[1]. Neighbours from the same era tend to hit the same plumbing problems at the same time.
Freeze risk: the delaware forecast zone logged 55 winter-storm, ice or hard-freeze days in 2016–2025, including February 2021; the latest was Dec 13, 2025[4].
Water from the sky is plumbing work too: 24 flood or flash-flood reports within 10 miles over 2016–2025[4], and FEMA logged 42 flood-insurance claims across Delaware's ZIPs[5]. Homes that take water need working drainage, sump pumps and backflow prevention.
78% of homes heat with utility gas, and 35% of households rent[1]. Tenants: report plumbing failures to the landlord in writing.
Measured against the 15 suburbs on this site, Delaware records the 3rd-fewest flood reports nearby (24, tied with Newark)[4].
Delaware storm calendar
Within 10 miles of Delaware, 2016–2025: 6 flash-flood reports and 18 flood or heavy-rain reports[4]. Peak: 67% in May, June, and July. Busiest year 2018 (6); 4 of 10 years had none. Busiest month June 2018 (5). Latest: flood or heavy-rain report, Aug 31, 2021, 9.2 mi out.
| Month | Flash flood | Flood & heavy rain | All |
|---|---|---|---|
| Feb | – | 1 | 1 |
| Mar | 1 | – | 1 |
| May | 1 | 3 | 4 |
| Jun | 2 | 5 | 7 |
| Jul | – | 5 | 5 |
| Aug | – | 1 | 1 |
| Sep | – | 1 | 1 |
| Nov | 2 | 2 | 4 |
Get plumbing help in Delaware
Requests go to Plumbing repair contractors serving the Delaware area — ZIP code 43015.
Before you call: before the plumber arrives
The Delaware numbers behind this page
| Measure | Delaware | Median of 15 | Difference |
|---|---|---|---|
| Built 2010 or later | 24% | 10% | 14 pts higher |
| Built before 1960 | 21.9% | 14.4% | 7 pts higher |
| Flood reports (10 mi) | 24 | 35 | 11 fewer |
| Renter-occupied | 35% | 29% | 6 pts higher |
| Built before 1980 | 36% | 42% | 6 pts lower |
| Utility-gas heat | 78% | 75% | 3 pts higher |
| Median year built | 1995 | 1985 | 10 years newer |
Biggest gaps first. Medians are middle values across the Columbus-area suburbs we cover, drawn from the same sources.
| City | Flood reports | NFIP claims | Freeze days |
|---|---|---|---|
| Delaware | 24 | 42 | 55 |
| Powell 8.2 mi | 32 | 32 | 55 |
| Dublin 12.5 mi | 19 | 26 | 68 |
| Worthington 13.4 mi | 43 | 60 | 68 |
| Westerville 14.1 mi | 35 | 71 | 68 |
| Marysville 15.0 mi | 17 | 23 | 49 |
| ZIP | Claims | Paid | Busiest year |
|---|---|---|---|
| 43015 | 42 | $526,397 | 1980 (6) |
ZIPs extend past city limits.
| Date | Type | Distance |
|---|---|---|
| Aug 31, 2021 | Flood | 9.2 mi |
| Sep 7, 2020 | Flood | 5.9 mi |
| May 19, 2020 | Flash Flood | 2.5 mi |
| May 19, 2020 | Flood | 2.1 mi |
| May 19, 2020 | Flood | 1.7 mi |
| Mar 28, 2020 | Flash Flood | 9.4 mi |
| Jul 3, 2019 | Flood | 5.9 mi |
| Jul 3, 2019 | Flood | 2.2 mi |
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 1,120 | 6.3% | ±280 |
| 2010 to 2019 | 3,137 | 17.7% | ±426 |
| 2000 to 2009 | 3,054 | 17.2% | ±387 |
| 1990 to 1999 | 2,906 | 16.4% | ±365 |
| 1980 to 1989 | 1,152 | 6.5% | ±227 |
| 1970 to 1979 | 1,420 | 8.0% | ±273 |
| 1960 to 1969 | 1,062 | 6.0% | ±232 |
| 1950 to 1959 | 894 | 5.0% | ±227 |
| 1940 to 1949 | 86 | 0.5% | ±62 |
| 1939 or earlier | 2,895 | 16.3% | ±456 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| Measure | Value |
|---|---|
| Housing units | 17,726 |
| Detached single-family | 11,237 (63%) |
| Occupied homes | 16,728 |
| Owner-occupied | 10,830 (65%) |
| Renter-occupied | 5,898 (35%) |
| Median home value | $318,400 |
ACS 2020–2024 estimates.
| Main heating fuel | Homes | Share | Margin of error |
|---|---|---|---|
| Utility gas | 13,082 | 78.2% | ±527 |
| Electricity | 3,420 | 20.4% | ±388 |
| Bottled or tank gas (propane, butane, etc.) | 149 | 0.9% | ±95 |
| No fuel used | 69 | 0.4% | ±57 |
| Wood | 8 | 0.0% | ±12 |
| ZIP (ZCTA) | Share of Delaware's land | Share of the ZIP inside the city |
|---|---|---|
| 43015 | 98% | 15% |
Dated heat and freeze records for the DELAWARE forecast zone: see the county list.
Common Delaware plumbing questions
Are Delaware homes likely to have old galvanized pipes?
Only an inspection can say, but age is the clue: 22% were built before 1960 and 36% before 1980[1].
How often do pipes freeze in Delaware?
The record for Delaware's forecast zone shows 55 winter-storm or freeze days over 2016–2025, in 10 different years[4].
Which ZIP codes are covered in Delaware?
43015[6], in Delaware County. Nearby suburbs with their own pages: Powell (8.2 mi), Dublin (12.5 mi), and Worthington (13.4 mi)[3].
My Delaware home is fairly new — could the plumbing and water heater still be under warranty?
Possibly: 24% of Delaware's housing units were built in 2010 or later[1], the 4th-highest share of the 15 Columbus-area suburbs we cover. Check your closing paperwork for warranties before paying for a repair.
I rent in Delaware. Who arranges the repair?
35% of occupied Delaware homes are rented[1], the 5th-highest share of the 15 Columbus-area suburbs we cover. Tell your landlord or property manager in writing first; your lease says who arranges repairs.
Sources
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- NOAA Storm Events Database
- OpenFEMA NFIP claims
- Census 2020 ZCTA–place file
Data pulled Sep 28, 2026. Full citations and method.