Home age in ZIP 45402, Dayton, OH: median built 1938

Home age is not roof age, and the Census does not record replacements. ZIP 45402 in Dayton, OH: median home built 1938; 85.6% of homes (5,552) are older than 25 years and 10.1% (658) were built since 2010, out of 6,484 homes.

U.S. Census Bureau, American Community Survey 2019 to 2023 (5-year estimates), retrieved October 9, 2026. Area = Census ZIP Code Tabulation Area 45402.

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Share of homes in ZIP 45402 by decade builtColumns from the pre-1940 decade on the left to 2020 and later on the right. pre-1940 53.3 percent; 1940s 10.7 percent; 1950s 7.3 percent; 1960s 5.6 percent; 1970s 4.4 percent; 1980s 2.1 percent; 1990s 2.2 percent; 2000s 4.2 percent; 2010s 9.9 percent; 2020+ 0.2 percentpre-1940: 3,455 homes, 53.3%53.3%pre-1940Montgomery County: 15.7%1940s: 693 homes, 10.7%10.7%1940sMontgomery County: 7.6%1950s: 476 homes, 7.3%7.3%1950sMontgomery County: 17.0%1960s: 361 homes, 5.6%5.6%1960sMontgomery County: 16.8%1970s: 285 homes, 4.4%4.4%1970sMontgomery County: 16.7%1980s: 137 homes, 2.1%2.1%1980sMontgomery County: 9.3%1990s: 145 homes, 2.2%2.2%1990sMontgomery County: 7.5%2000s: 274 homes, 4.2%4.2%2000sMontgomery County: 6.2%2010s: 643 homes, 9.9%9.9%2010sMontgomery County: 2.8%2020+: 15 homes, 0.2%0.2%2020+Montgomery County: 0.4%Built 1999 or earlier: 85.6% of homes (5,552)ZIP 45402, built before 2000built 2000 or laterMontgomery County

Share of the 6,484 housing units in the ZIP, by decade built. The red marks are Montgomery County. This counts houses, not roofs: a roof is replaced several times in the life of a house, and no federal survey records when.

ZIP 45402 next to Dayton and Montgomery County

IndicatorZIP 45402DaytonMontgomery CountyRank among 6 ZIPs of Dayton on this site
Housing units6,48469,640252,4755th of 6 largest
Median year built1938195119661st of 6 oldest
Built before 198081.3%85.8%73.8%
Built before 200085.6%no data90.6%6th of 6 highest share
Built since 201010.1%no data3.2%
Owner-occupied homes37.2%48.2%62.3%5th of 6 highest share
Single-family units64.1%70.2%no data
Median home value$105,900 (+/- $35,863)$93,200$167,4001st of 6 highest
Median household income$45,386 (+/- $7,169)$43,454no data2nd of 6 highest

City figures are for the Census place, county figures for the county; “no data” means the Census file does not publish that figure. Value and income are survey estimates, the plus-or-minus is the 90% margin of error.

Every decade in ZIP 45402

BuiltShare of Montgomery CountyShare of ZIPHomes in ZIP 45402
2020+0.4%0.2%15
2010s2.8%9.9%643
2000s6.2%4.2%274
1990s7.5%2.2%145
1980s9.3%2.1%137
1970s16.7%4.4%285
1960s16.8%5.6%361
1950s17.0%7.3%476
1940s7.6%10.7%693
pre-194015.7%53.3%3,455

Counts are Census estimates of housing units by year built (table B25034). If a roof had never been replaced, it would be 3 to 6 years old on a house from the 2020s, 17 to 26 on one from the 2000s, 37 to 46 on one from the 1980s and 87 or more on one from before 1940. Most older houses have had at least one replacement, and the Census does not record when.

What the numbers say about ZIP 45402

ZIP 45402 has 6,484 housing units: 5,552 (85.6%) were built before 2000, 658 (10.1%) in 2010 or later, and 3,455 (53.3%) before 1940, its largest era. The median year built is 1938 (Dayton: 1951), so 13 years older than the city.

Housing mix and money, from the same survey: 37.2% of occupied homes are owner-occupied; 64.1% of units are single-family houses; the median owner-occupied home is valued at $105,900, give or take $35,863; median household income is $45,386, give or take $7,169; the ZIP holds 9.3% of the housing units the Census counts in Dayton, 6,484 of them. These are survey estimates with margins of error, and for a small ZIP the margin can be wide.

Reading this for roofs, carefully: the Census records when a house was built, never when its roof was last replaced. If every roof were still the one installed with its house, 5,407 units (83.4%, built before 1990) would be past the 30-year top of the usual asphalt-shingle range, 145 (2.2%, the 1990s) would mostly sit past it, 274 (4.2%, the 2000s) would mostly be inside the 20 to 30 year window and 658 (10.1%, 2010 onward) would be younger than it. Most older roofs have been replaced, so treat these as the pool of houses where an old roof is possible, not as a count of old roofs.

Roof age calculator for ZIP 45402

Enter the year your house was built, and the year the roof was last replaced if you know it. It starts at the median year built for this ZIP. The share of neighbours’ homes older than yours comes from this ZIP’s own decade counts.

–years old (roof)
–of homes in ZIP 45402 are older
–vs. the ZIP median year built

Material ranges are general planning figures (the same ones as on our roof-age page), not warranties. Sun, storms, attic ventilation and installation quality move them. The decade shares assume homes were built evenly within each decade. This is not an inspection: a roofer on the roof decides.

Map: ZIP 45402 among Dayton’s ZIP areas

Map of ZIP 45402 and nearby ZIP areas, shaded by the share of homes built before 2000ZIP 45405: 11,773 homes, 95% built before 2000, median year 194645405ZIP 45406: 10,695 homes, 96.2% built before 2000, median year 195445406ZIP 45410: 8,028 homes, 98.1% built before 2000, median year 193845410ZIP 45403: 7,429 homes, 97.9% built before 2000, median year 194645403ZIP 45404: 4,846 homes, 90.6% built before 2000, median year 195245404ZIP 45402: 6,484 homes, 85.6% built before 2000, median year 193845402
  • under 20% built before 2000
  • 40 to 60%
  • 80% or more
  • Dot size = housing units. Red ring = ZIP 45402. Click a dot to open that ZIP.

Closest ZIP areas

ZIPMilesMedian builtPre-2000
454052.3 N194695.0%
454062.5 NW195496.2%
454102.7 E193898.1%
454033.1 E194697.9%
454043.5 NE195290.6%

Distance is between Census ZIP centres.

Storm backdrop: Montgomery County

A ZIP is too small for its own hail record, so this is the county. FEMA’s National Risk Index rates Montgomery County Relatively Moderate overall (92.7 of 100), Relatively High for hail (95.7), Relatively High for strong wind (97.5) and Relatively High for tornado (92.6). NOAA logged 71 hail reports in the county, on 12 days with hail of 1 inch or more in the full years 2014 to 2025.

FEMA National Risk Index, December 2025 version, county level. This product uses FEMA’s National Risk Index data but is not endorsed by FEMA.

Where to go from here

Other roofing cities near ZIP 45402: Springfield, OH (24 miles), Hamilton, OH (31 miles), Muncie, IN (69 miles).

Questions

How old are the homes in ZIP 45402?

Of the 6,484 housing units, 5,270 (81.3%) were built before 1980, 5,552 (85.6%) before 2000 and 658 (10.1%) from 2010 on (Census ACS 2019 to 2023, survey estimate).

Does a house's age tell me how old its roof is in 45402?

No. ACS records the year the structure was built, not the year the roof was last replaced. With 5,270 units built before 1980 in this ZIP, many roofs are replacements rather than originals. Ask the seller for permit records or have a roofer inspect the roof.

Which nearby ZIP has the oldest housing?

Of the 5 closest ZIP areas we cover, 45410 (2.7 miles E) has the largest share built before 2000, 98.1%, against 85.6% in 45402.

Source: U.S. Census Bureau, American Community Survey 5-year estimates 2019 to 2023, tables B25034 (year structure built), B25035, B25003, B25024, B25077 and B19013, ZIP Code Tabulation Areas; ZIP-to-city assignment from the Census 2020 ZCTA-to-place relationship file (a ZIP is assigned to a city when more than half of its land area lies inside it). A ZCTA is not a USPS ZIP code: it approximates one and can differ at the edges. Public domain. The 12 ZIP-specific figures above differ from ZIP to ZIP.

Information only, not a roof inspection. Pickaroofer does not know the condition of any individual roof.