Home age in ZIP 55805, Duluth, MN: median built 1938

Home age is not roof age, and the Census does not record replacements. ZIP 55805 in Duluth, MN: median home built 1938; 94.3% of homes (5,118) are older than 25 years and 0.9% (47) were built since 2010, out of 5,430 homes.

U.S. Census Bureau, American Community Survey 2019 to 2023 (5-year estimates), retrieved October 9, 2026. Area = Census ZIP Code Tabulation Area 55805.

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Share of homes in ZIP 55805 by decade builtColumns from the pre-1940 decade on the left to 2020 and later on the right. pre-1940 60.2 percent; 1940s 3.6 percent; 1950s 5.3 percent; 1960s 9.4 percent; 1970s 8.3 percent; 1980s 4.1 percent; 1990s 3.3 percent; 2000s 4.9 percent; 2010s 0.9 percent; 2020+ 0 percentpre-1940: 3,269 homes, 60.2%60.2%pre-1940St. Louis County: 28.6%1940s: 195 homes, 3.6%3.6%1940sSt. Louis County: 6.0%1950s: 286 homes, 5.3%5.3%1950sSt. Louis County: 13.8%1960s: 511 homes, 9.4%9.4%1960sSt. Louis County: 8.0%1970s: 453 homes, 8.3%8.3%1970sSt. Louis County: 14.3%1980s: 225 homes, 4.1%4.1%1980sSt. Louis County: 7.3%1990s: 179 homes, 3.3%3.3%1990sSt. Louis County: 7.8%2000s: 265 homes, 4.9%4.9%2000sSt. Louis County: 9.1%2010s: 47 homes, 0.9%0.9%2010sSt. Louis County: 4.8%2020+: 0 homes, 0.0%0%2020+St. Louis County: 0.5%Built 1999 or earlier: 94.3% of homes (5,118)ZIP 55805, built before 2000built 2000 or laterSt. Louis County

Share of the 5,430 housing units in the ZIP, by decade built. The red marks are St. Louis 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 55805 next to Duluth and St. Louis County

IndicatorZIP 55805DuluthSt. Louis CountyRank among 6 ZIPs of Duluth on this site
Housing units5,43039,805103,9241st of 6 largest
Median year built1938195119621st of 6 oldest
Built before 198086.8%78.3%70.6%
Built before 200094.3%no data85.6%2nd of 6 highest share
Built since 20100.9%no data5.3%
Owner-occupied homes28.9%60.2%72%6th of 6 highest share
Single-family units42.4%63.4%no data
Median home value$171,100 (+/- $9,322)$225,700$208,5003rd of 6 highest
Median household income$43,077 (+/- $5,446)$66,263no data5th 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 55805

BuiltShare of St. Louis CountyShare of ZIPHomes in ZIP 55805
2020+0.5%0.0%0
2010s4.8%0.9%47
2000s9.1%4.9%265
1990s7.8%3.3%179
1980s7.3%4.1%225
1970s14.3%8.3%453
1960s8.0%9.4%511
1950s13.8%5.3%286
1940s6.0%3.6%195
pre-194028.6%60.2%3,269

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 55805

ZIP 55805 has 5,430 housing units: 5,118 (94.3%) were built before 2000, 47 (0.9%) in 2010 or later, and 3,269 (60.2%) before 1940, its largest era. The median year built is 1938 (Duluth: 1951), so 13 years older than the city.

Housing mix and money, from the same survey: 28.9% of occupied homes are owner-occupied; 42.4% of units are single-family houses; the median owner-occupied home is valued at $171,100, give or take $9,322; median household income is $43,077, give or take $5,446; the ZIP holds 13.6% of the housing units the Census counts in Duluth, 5,430 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, 4,939 units (91%, built before 1990) would be past the 30-year top of the usual asphalt-shingle range, 179 (3.3%, the 1990s) would mostly sit past it, 265 (4.9%, the 2000s) would mostly be inside the 20 to 30 year window and 47 (0.9%, 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 55805

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 55805 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 55805 among Duluth’s ZIP areas

Map of ZIP 55805 and nearby ZIP areas, shaded by the share of homes built before 2000ZIP 55806: 4,848 homes, 93.8% built before 2000, median year 193855806ZIP 55807: 4,572 homes, 94.6% built before 2000, median year 193855807ZIP 55812: 3,954 homes, 90.7% built before 2000, median year 193855812ZIP 55808: 2,786 homes, 92.1% built before 2000, median year 194855808ZIP 55802: 1,529 homes, 88.2% built before 2000, median year 195955802ZIP 55805: 5,430 homes, 94.3% built before 2000, median year 193855805
  • under 20% built before 2000
  • 40 to 60%
  • 80% or more
  • Dot size = housing units. Red ring = ZIP 55805. Click a dot to open that ZIP.

Closest ZIP areas

ZIPMilesMedian builtPre-2000
558121.2 NE193890.7%
558022.5 S195988.2%
558062.7 SW193893.8%
558075.7 SW193894.6%
5580810.8 SW194892.1%

Distance is between Census ZIP centres.

Storm backdrop: St. Louis County

A ZIP is too small for its own hail record, so this is the county. FEMA’s National Risk Index rates St. Louis County Relatively Moderate overall (91.6 of 100), Relatively Moderate for hail (84.0), Relatively Moderate for strong wind (71.3) and Relatively Low for tornado (64.7). NOAA logged 239 hail reports in the county, on 45 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 55805: St. Cloud, MN (131 miles), Eau Claire, WI (140 miles), Rochester, MN (193 miles).

Questions

How old are the homes in ZIP 55805?

Of the 5,430 housing units, 4,714 (86.8%) were built before 1980, 5,118 (94.3%) before 2000 and 47 (0.9%) from 2010 on (Census ACS 2019 to 2023, survey estimate).

Does a house's age tell me how old its roof is in 55805?

No. ACS records the year the structure was built, not the year the roof was last replaced. With 4,714 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, 55807 (5.7 miles SW) has the largest share built before 2000, 94.6%, against 94.3% in 55805.

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.