Home age in ZIP 50702, Waterloo, IA: median built 1959

Home age is not roof age, and the Census does not record replacements. ZIP 50702 in Waterloo, IA: median home built 1959; 91.4% of homes (8,886) are older than 25 years and 5.9% (572) were built since 2010, out of 9,722 homes.

U.S. Census Bureau, American Community Survey 2019 to 2023 (5-year estimates), retrieved October 9, 2026. Area = Census ZIP Code Tabulation Area 50702.

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Share of homes in ZIP 50702 by decade builtColumns from the pre-1940 decade on the left to 2020 and later on the right. pre-1940 15.5 percent; 1940s 8.1 percent; 1950s 28.2 percent; 1960s 20.8 percent; 1970s 12.5 percent; 1980s 3.3 percent; 1990s 3 percent; 2000s 2.7 percent; 2010s 5.8 percent; 2020+ 0.1 percentpre-1940: 1,509 homes, 15.5%15.5%pre-1940Black Hawk County: 18.5%1940s: 791 homes, 8.1%8.1%1940sBlack Hawk County: 6.7%1950s: 2,744 homes, 28.2%28.2%1950sBlack Hawk County: 16.4%1960s: 2,018 homes, 20.8%20.8%1960sBlack Hawk County: 13.6%1970s: 1,213 homes, 12.5%12.5%1970sBlack Hawk County: 15.5%1980s: 316 homes, 3.3%3.3%1980sBlack Hawk County: 5.6%1990s: 295 homes, 3.0%3%1990sBlack Hawk County: 7.9%2000s: 264 homes, 2.7%2.7%2000sBlack Hawk County: 7.7%2010s: 563 homes, 5.8%5.8%2010sBlack Hawk County: 7.8%2020+: 9 homes, 0.1%0.1%2020+Black Hawk County: 0.3%Built 1999 or earlier: 91.4% of homes (8,886)ZIP 50702, built before 2000built 2000 or laterBlack Hawk County

Share of the 9,722 housing units in the ZIP, by decade built. The red marks are Black Hawk 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 50702 next to Waterloo and Black Hawk County

IndicatorZIP 50702WaterlooBlack Hawk CountyRank among 1 ZIPs of Waterloo on this site
Housing units9,72232,17058,748
Median year built195919611966
Built before 198085.1%77.8%70.7%
Built before 200091.4%no data84.2%
Built since 20105.9%no data8%
Owner-occupied homes59.5%61.1%65.3%
Single-family units73.5%72.9%no data
Median home value$145,800 (+/- $5,611)$150,200$182,400
Median household income$59,784 (+/- $3,876)$56,344no data

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 50702

BuiltShare of Black Hawk CountyShare of ZIPHomes in ZIP 50702
2020+0.3%0.1%9
2010s7.8%5.8%563
2000s7.7%2.7%264
1990s7.9%3.0%295
1980s5.6%3.3%316
1970s15.5%12.5%1,213
1960s13.6%20.8%2,018
1950s16.4%28.2%2,744
1940s6.7%8.1%791
pre-194018.5%15.5%1,509

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 50702

ZIP 50702 has 9,722 housing units: 8,886 (91.4%) were built before 2000, 572 (5.9%) in 2010 or later, and 2,744 (28.2%) in the 1950s, its largest era. The median year built is 1959 (Waterloo: 1961), so 2 years older than the city.

Housing mix and money, from the same survey: 59.5% of occupied homes are owner-occupied; 73.5% of units are single-family houses; the median owner-occupied home is valued at $145,800, give or take $5,611; median household income is $59,784, give or take $3,876; the ZIP holds 30.2% of the housing units the Census counts in Waterloo, 9,722 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, 8,591 units (88.4%, built before 1990) would be past the 30-year top of the usual asphalt-shingle range, 295 (3%, the 1990s) would mostly sit past it, 264 (2.7%, the 2000s) would mostly be inside the 20 to 30 year window and 572 (5.9%, 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 50702

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 50702 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 50702 among Waterloo’s ZIP areas

Map of ZIP 50702 and nearby ZIP areas, shaded by the share of homes built before 2000ZIP 50702: 9,722 homes, 91.4% built before 2000, median year 195950702
  • under 20% built before 2000
  • 40 to 60%
  • 80% or more
  • Dot size = housing units. Red ring = ZIP 50702. Click a dot to open that ZIP.

Storm backdrop: Black Hawk County

A ZIP is too small for its own hail record, so this is the county. FEMA’s National Risk Index rates Black Hawk County Relatively Low overall (76.6 of 100), Relatively Moderate for hail (87.3), Relatively High for strong wind (94.7) and Relatively High for tornado (91.4). NOAA logged 65 hail reports in the county, on 15 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 50702: Cedar Rapids, IA (47 miles), Iowa City, IA (68 miles), Ames, IA (73 miles).

Questions

How old are the homes in ZIP 50702?

Of the 9,722 housing units, 8,275 (85.1%) were built before 1980, 8,886 (91.4%) before 2000 and 572 (5.9%) from 2010 on (Census ACS 2019 to 2023, survey estimate).

Does a house's age tell me how old its roof is in 50702?

No. ACS records the year the structure was built, not the year the roof was last replaced. With 8,275 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.

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.