Home age in ZIP 45405, Dayton, OH: median built 1946

Home age is not roof age, and the Census does not record replacements. ZIP 45405 in Dayton, OH: median home built 1946; 95% of homes (11,181) are older than 25 years and 1.6% (183) were built since 2010, out of 11,773 homes.

U.S. Census Bureau, American Community Survey 2019 to 2023 (5-year estimates), retrieved October 9, 2026. Area = Census ZIP Code Tabulation Area 45405.

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Share of homes in ZIP 45405 by decade builtColumns from the pre-1940 decade on the left to 2020 and later on the right. pre-1940 42.6 percent; 1940s 12.2 percent; 1950s 12.5 percent; 1960s 10.8 percent; 1970s 10.9 percent; 1980s 4.3 percent; 1990s 1.7 percent; 2000s 3.5 percent; 2010s 1.6 percent; 2020+ 0 percentpre-1940: 5,018 homes, 42.6%42.6%pre-1940Montgomery County: 15.7%1940s: 1,434 homes, 12.2%12.2%1940sMontgomery County: 7.6%1950s: 1,472 homes, 12.5%12.5%1950sMontgomery County: 17.0%1960s: 1,268 homes, 10.8%10.8%1960sMontgomery County: 16.8%1970s: 1,285 homes, 10.9%10.9%1970sMontgomery County: 16.7%1980s: 507 homes, 4.3%4.3%1980sMontgomery County: 9.3%1990s: 197 homes, 1.7%1.7%1990sMontgomery County: 7.5%2000s: 409 homes, 3.5%3.5%2000sMontgomery County: 6.2%2010s: 183 homes, 1.6%1.6%2010sMontgomery County: 2.8%2020+: 0 homes, 0.0%0%2020+Montgomery County: 0.4%Built 1999 or earlier: 95% of homes (11,181)ZIP 45405, built before 2000built 2000 or laterMontgomery County

Share of the 11,773 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 45405 next to Dayton and Montgomery County

IndicatorZIP 45405DaytonMontgomery CountyRank among 6 ZIPs of Dayton on this site
Housing units11,77369,640252,4751st of 6 largest
Median year built1946195119663rd of 6 oldest
Built before 198089%85.8%73.8%
Built before 200095%no data90.6%4th of 6 highest share
Built since 20101.6%no data3.2%
Owner-occupied homes33.8%48.2%62.3%6th of 6 highest share
Single-family units54.1%70.2%no data
Median home value$74,100 (+/- $8,721)$93,200$167,4005th of 6 highest
Median household income$41,901 (+/- $2,976)$43,454no data4th 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 45405

BuiltShare of Montgomery CountyShare of ZIPHomes in ZIP 45405
2020+0.4%0.0%0
2010s2.8%1.6%183
2000s6.2%3.5%409
1990s7.5%1.7%197
1980s9.3%4.3%507
1970s16.7%10.9%1,285
1960s16.8%10.8%1,268
1950s17.0%12.5%1,472
1940s7.6%12.2%1,434
pre-194015.7%42.6%5,018

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 45405

ZIP 45405 has 11,773 housing units: 11,181 (95%) were built before 2000, 183 (1.6%) in 2010 or later, and 5,018 (42.6%) before 1940, its largest era. The median year built is 1946 (Dayton: 1951), so 5 years older than the city.

Housing mix and money, from the same survey: 33.8% of occupied homes are owner-occupied; 54.1% of units are single-family houses; the median owner-occupied home is valued at $74,100, give or take $8,721; median household income is $41,901, give or take $2,976; the ZIP holds 16.9% of the housing units the Census counts in Dayton, 11,773 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, 10,984 units (93.3%, built before 1990) would be past the 30-year top of the usual asphalt-shingle range, 197 (1.7%, the 1990s) would mostly sit past it, 409 (3.5%, the 2000s) would mostly be inside the 20 to 30 year window and 183 (1.6%, 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 45405

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 45405 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 45405 among Dayton’s ZIP areas

Map of ZIP 45405 and nearby ZIP areas, shaded by the share of homes built before 2000ZIP 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 45402: 6,484 homes, 85.6% built before 2000, median year 193845402ZIP 45404: 4,846 homes, 90.6% built before 2000, median year 195245404ZIP 45405: 11,773 homes, 95% built before 2000, median year 194645405
  • under 20% built before 2000
  • 40 to 60%
  • 80% or more
  • Dot size = housing units. Red ring = ZIP 45405. Click a dot to open that ZIP.

Closest ZIP areas

ZIPMilesMedian builtPre-2000
454061.5 W195496.2%
454022.3 S193885.6%
454043.4 E195290.6%
454034.0 SE194697.9%
454104.3 SE193898.1%

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 45405: Springfield, OH (23 miles), Hamilton, OH (33 miles), Muncie, IN (68 miles).

Questions

How old are the homes in ZIP 45405?

Of the 11,773 housing units, 10,477 (89%) were built before 1980, 11,181 (95%) before 2000 and 183 (1.6%) from 2010 on (Census ACS 2019 to 2023, survey estimate).

Does a house's age tell me how old its roof is in 45405?

No. ACS records the year the structure was built, not the year the roof was last replaced. With 10,477 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 (4.3 miles SE) has the largest share built before 2000, 98.1%, against 95% in 45405.

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.