Photo: Abdur Abdul-Malik, Portland Appraisal Blog
Detached-home sales in Troutdale were heavily concentrated on modest suburban lots during 2024 and 2025. While site sizes ranged from 0.06 acres to 3.95 acres, most detached-home sales occurred on lots of approximately 0.15 acres and less than 0.30 acres.
The table below compares key lot-size metrics across both years.
| Category | 2024 | 2025 | Change |
|---|---|---|---|
| Average Lot Size | 0.2160 | 0.2121 | -1.77% |
| Median Lot Size | 0.1800 | 0.1700 | -5.55% |
| Largest Lot Size | 2.3700 | 3.9500 | +1.58 Acres |
| Smallest Lot Size | 0.0600 | 0.0600 | 0.00% |
| Total # of Sales | 112 | 123 | +11 homes |
Single-Family Detached Residential | 2024 vs. 2025
Data: RMLS | PortlandAppraisalBlog.com
Note: Lot sizes are reported by listing agents in RMLS and may be approximate. These figures are best used to identify broad market patterns rather than determine precise site areas.
The typical detached-home lot sold in 2025 was slightly smaller than in 2024. Average lot size declined from 0.2160 acres to 0.2121 acres, while median lot size declined from 0.1800 acres to 0.1700 acres. Converted to approximate square-foot equivalents, average lot sizes were approximately 9,200-9,400 square feet, while median lot sizes ranged from roughly 7,400-7,800 square feet.
The histogram below shows where detached-home sales were concentrated by lot size during 2024 and 2025.
Lot sizes were highly concentrated within a relatively narrow range. The largest concentration occurred between 0.150 and 0.174 acres (63 sales), followed by 0.175-0.199 acres (39 sales), 0.200-0.224 acres (29 sales), and 0.225-0.249 acres (27 sales). Together, these four adjacent ranges accounted for 158 of 235 sales.
Relatively few detached-home sales occurred on large lots. Sales activity declined steadily beyond 0.25 acres, while acreage properties represented only a small portion of the market.
The table below summarizes each lot-size band and includes the number of sales as well as average sales price, home size, construction era, and lot size.
| Lot Size Range | Sales | Avg Close Price | Avg Total SF | Avg Year Built | Avg Acres |
|---|---|---|---|---|---|
| 0.000 ac – 0.024 ac | 0 | — | — | — | — |
| 0.025 ac – 0.049 ac | 0 | — | — | — | — |
| 0.050 ac – 0.074 ac | 12 | $457,496 | 1,748 | 2006 | 0.0642 |
| 0.075 ac – 0.099 ac | 7 | $479,000 | 1,862 | 2009 | 0.0871 |
| 0.100 ac – 0.124 ac | 22 | $484,859 | 1,748 | 1996 | 0.1150 |
| 0.125 ac – 0.149 ac | 8 | $478,300 | 1,421 | 1994 | 0.1322 |
| 0.150 ac – 0.174 ac | 63 | $500,154 | 1,698 | 1990 | 0.1630 |
| 0.175 ac – 0.199 ac | 39 | $485,415 | 1,621 | 1984 | 0.1838 |
| 0.200 ac – 0.224 ac | 29 | $517,917 | 1,757 | 1988 | 0.2110 |
| 0.225 ac – 0.249 ac | 27 | $507,354 | 1,793 | 1984 | 0.2333 |
| 0.250 ac – 0.274 ac | 10 | $507,694 | 1,925 | 1982 | 0.2560 |
| 0.275 ac – 0.299 ac | 7 | $524,257 | 1,752 | 1987 | 0.2853 |
| 0.300 ac – 0.324 ac | 3 | $502,667 | 1,432 | 1977 | 0.3167 |
| 0.325 ac – 0.349 ac | 0 | — | — | — | — |
| 0.350 ac – 0.374 ac | 0 | — | — | — | — |
| 0.375 ac – 0.399 ac | 0 | — | — | — | — |
| 0.400 ac – 0.424 ac | 1 | $447,000 | 1,078 | 1988 | 0.4200 |
| 0.425 ac – 0.449 ac | 0 | — | — | — | — |
| 0.450 ac – 0.474 ac | 0 | — | — | — | — |
| ≥ 0.475 ac | 7 | $704,143 | 2,502 | 1960 | 1.3614 |
| Total/Average | 235 | $502,664 | 1,735 | 1989 | 0.2140 |
Single-Family Detached Residential | 2024 & 2025
Data: RMLS | PortlandAppraisalBlog.com
The market was highly concentrated. Lots between 0.050 and 0.299 acres accounted for 224 of 235 sales, or 95.32% of all detached-home transactions during the study period.
Sale prices generally increased as lot sizes increased, although transaction counts became sparse beyond approximately 0.30 acres. The largest-lot cohort averaged more than $700,000, 2,502 square feet, and 1.36 acres, but included only seven sales.
Smaller lots also tended to be associated with newer development. The smallest detached-home lots in the study averaged just 0.064 acres and were built around 2006, while larger-lot homes generally reflected older construction periods. This pattern aligns with a common subdivision-development trend in which newer homes are built on increasingly smaller sites.
Troutdale’s detached-home market was overwhelmingly concentrated on lots between approximately 0.05 and less than 0.30 acres.
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
- PAB Insights: When Were Troutdale’s Homes Built (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
