Photo: Abdur Abdul-Malik, Portland Appraisal Blog
Detached-home sales in Troutdale spanned construction dates from the late 1800s to the 2020s during 2024 and 2025. Although Troutdale was incorporated in 1907, the overwhelming majority of detached homes sold during the study period were built from the 1970s onward.
The table below compares key year-built metrics across both years.
| Category | 2024 | 2025 | Change |
|---|---|---|---|
| Average Year Built | 1990 | 1988 | -2 Years |
| Median Year Built | 1992 | 1990 | -2 Years |
| Oldest Home | 1944 | 1893 | -51 Years |
| Newest Home | 2022 | 2020 | -2 Years |
| Total # of Sales | 112 | 123 | +11 homes |
Single-Family Detached Residential | 2024 vs. 2025
Data: RMLS | PortlandAppraisalBlog.com
The typical detached home sold in 2025 was slightly older than in 2024. Average year built declined from 1990 to 1988, while median year built declined from 1992 to 1990. Across the two-year study period, the oldest home sold was built in 1893, while the newest was built in 2022.
The chart below shows where detached-home sales were concentrated by construction era during 2024 and 2025.
Detached-home sales involving homes built before 1970 were relatively uncommon. The number of sales increased sharply beginning in the 1970s and remained elevated through much of the late-20th-century and early-21st-century housing stock.
The largest concentrations occurred among homes built in 1975-1979 (48 sales), 1990-1994 (47 sales), 1995-1999 (39 sales), and 2005-2009 (28 sales). Rather than reflecting steady construction over time, the distribution suggests Troutdale’s detached-housing stock developed through a series of major building cycles.
Construction activity was noticeably lighter during the 2010s, and the newest home sold during the study period was built in 2022.
The table below summarizes each construction-era band and includes average sales price, home size, year built, and lot size.
| Year Built Range | Sales | Avg Close Price | Avg Total SF | Avg Year Built | Avg Acres |
|---|---|---|---|---|---|
| ≤ 1934 | 3 | $678,333 | 2,694 | 1902 | 1.523 |
| 1935 – 1939 | 0 | — | — | — | — |
| 1940 – 1944 | 1 | $396,060 | 1,228 | 1944 | 0.250 |
| 1945 – 1949 | 0 | — | — | — | — |
| 1950 – 1954 | 1 | $420,000 | 1,226 | 1952 | 0.180 |
| 1955 – 1959 | 0 | — | — | — | — |
| 1960 – 1964 | 0 | — | — | — | — |
| 1965 – 1969 | 1 | $480,000 | 1,112 | 1969 | 0.190 |
| 1970 – 1974 | 13 | $506,077 | 1,711 | 1973 | 0.405 |
| 1975 – 1979 | 48 | $479,452 | 1,615 | 1977 | 0.203 |
| 1980 – 1984 | 23 | $455,963 | 1,434 | 1982 | 0.213 |
| 1985 – 1989 | 16 | $491,494 | 1,539 | 1988 | 0.282 |
| 1990 – 1994 | 47 | $509,252 | 1,693 | 1993 | 0.189 |
| 1995 – 1999 | 39 | $515,427 | 1,841 | 1996 | 0.167 |
| 2000 – 2004 | 8 | $564,500 | 2,049 | 2002 | 0.170 |
| 2005 – 2009 | 28 | $509,065 | 2,021 | 2006 | 0.103 |
| 2010 – 2014 | 3 | $593,300 | 1,873 | 2013 | 0.193 |
| 2015 – 2019 | 0 | — | — | — | — |
| 2020 – 2024 | 4 | $566,250 | 2,202 | 2021 | 0.110 |
| ≥ 2025 | 0 | — | — | — | — |
| Total/Avg | 235 | $502,664 | 1,735 | 1989 | 0.214 |
Single-Family Detached Residential | 2024 & 2025
Data: RMLS | PortlandAppraisalBlog.com
The market was highly concentrated. Homes built between 1970 and 2009 accounted for 222 of 235 sales, or 94.47% of all detached-home transactions during the study period.
Within these construction eras, average home sizes generally increased over time. Homes built during the 1970s averaged approximately 1,600-1,700 square feet, while homes built after 2000 commonly exceeded 2,000 square feet.
Lot sizes generally moved in the opposite direction. As newer subdivisions were developed, homes tended to become larger while the average site size became smaller, a common pattern as builders sought to maximize the number of homes within a subdivision.
Troutdale’s sales over the study period with an average year built of 1989 reflect the center of several major development waves rather than a single dominant construction period. The strongest concentrations occurred in the late 1970s and again from the early 1990s through the 2000s.
Troutdale’s detached-home market was overwhelmingly concentrated in homes built between 1970 and 2009.
Related Studies
About PAB Insights
PAB Insights is a Portland Appraisal Blog (PAB) series providing concise, data-driven answers to individual housing-market questions using transaction-level research, local market knowledge, and proprietary models, such as the Portland Appraisal Blog Affordability Index (PABAI).
Sources & Further Reading
All data presented in this PAB Insight is sourced directly from RMLS and has been subjected to our rigorous cleaning and validation process to ensure reliability for detached single-family residential analysis in the six-county Portland Region. The trends, comparisons, and commentary are the result of original appraisal expertise and independent analysis—not aggregated from secondary sources or news summaries.
- RMLS Data Challenges: Portland Appraisal Blog
- The Portland Region – Six-County Market Area Overview: Portland Appraisal Blog
- City of Troutdale Housing Market Snapshot – 2025: Portland Appraisal Blog
- PAB Insights: What Could Different Household Incomes Buy Among Troutdale’s Affordable Homes?: Portland Appraisal Blog
- PAB Insights: What Income Was Required to Buy a Home in Troutdale (2024-2025)?: Portland Appraisal Blog
- PAB Insights: Which Home Sizes Sold Most Often in Troutdale (2024-2025)?: Portland Appraisal Blog
Coda
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About the Author — Abdur Abdul‑Malik, SRA, ASA
Abdur Abdul‑Malik is the founder, author, and publisher of the Portland Appraisal Blog, where he produces original regional and neighborhood‑level housing analytics for the Portland Region. He is a certified residential appraiser serving Oregon and Washington, drawing on RMLS transaction data, public records, and custom segmentation models he has built.
He developed the Portland Appraisal Blog Affordability Index (PABAI), a payment‑based affordability metric built from actual RMLS sales. PABAI incorporates weekly updates based on the prevailing 30‑year fixed mortgage rate, providing a locally grounded measure of housing affordability across the region.
Learn more → PABAI explainer • mortgage rate series • full author bio
