Cheaper homes, tighter squeeze: how 19,560 Bellingham-area renter households became the most cost-burdened in the state.
In 2024, 34,117 households rent their homes in Whatcom County. 19,560 of them — 57.3% — spend 30% or more of their income on rent. That’s the federal definition of “cost-burdened,” and it’s the highest share of any county in Washington State that has more than 5,000 renter households.
Higher than King County (45.2%). Higher than Snohomish (51.6%). Higher than Pierce (50.8%). Higher than Spokane (49.7%).
And it’s not because Bellingham has the highest rents. It doesn’t.
Here’s where the 2024 numbers land for major Washington counties:
| Rank | County | Renter HHs | % cost-burdened (≥30%) | Median rent | Median home value |
|---|---|---|---|---|---|
| 1 | Whatcom | 34,117 | 57.3% | $1,555 | $585,800 |
| 2 | Whitman¹ | 9,956 | 55.9% | $1,049 | $359,600 |
| 3 | Kittitas¹ | 7,699 | 53.1% | $1,341 | $497,400 |
| 4 | Thurston | 38,412 | 52.9% | $1,736 | $480,300 |
| 5 | Snohomish | 100,610 | 51.6% | $1,949 | $696,000 |
| 6 | Pierce | 123,930 | 50.8% | $1,806 | $526,600 |
| 7 | Island | 9,084 | 50.2% | $1,662 | $593,300 |
| 8 | Kitsap | 32,416 | 49.9% | $1,822 | $555,100 |
| 9 | Skagit | 15,665 | 49.8% | $1,536 | $545,100 |
| 10 | Spokane | 77,563 | 49.7% | $1,283 | $410,700 |
| 16 | King | 419,249 | 45.2% | $2,092 | $859,900 |
¹ Whitman and Kittitas are dominated by WSU and CWU, respectively — their renter populations are heavily student-skewed, which inflates cost-burden rates because students typically report low part-time-job incomes. Whatcom’s number is not a student artifact: WWU has roughly 16,000 students; the county has 34,000+ renter households.
The puzzle: Whatcom has the 4th-highest median home value on this list and the 9th-highest median rent — yet the highest cost burden. Seattle’s median home is $274,000 more expensive than Bellingham’s; Seattle’s median rent is $537/month higher. But a King County renter is 12 percentage points less likely to be cost-burdened than a Whatcom renter.
The math only works one way: incomes in Whatcom haven’t kept up with rents.
The same table, restricted to Whatcom County across 16 years of ACS 5-year vintages:
| Year | Total housing units | Median home value | Median rent | Renter HHs | % cost-burdened | Median HH income² |
|---|---|---|---|---|---|---|
| 2009 | 86,230 | $288,500 | $774 | 28,517 | 52.9% | $47,812 |
| 2014 | 91,447 | $273,000 | $919 | 29,829 | 53.5% | $53,025 |
| 2019 | 96,690 | $345,700 | $1,060 | 32,943 | 51.3% | $62,984 |
| 2024 | 103,520 | $585,800 | $1,555 | 34,117 | 57.3% | $81,784 |
| Change 2009→2024 | +20.1% | +103.0% | +100.9% | +19.6% | +4.4 pts | +71.1% |
² Median household income for Whatcom — Census ACS B19013, from RHRI’s county_income_history table.
In plain language: median home value doubled. Median rent doubled. Median household income grew 71%. The gap is the cost burden.
Cost burden didn’t just creep — it jumped between 2019 and 2024, when rent climbed 47% in five years while income climbed 30%. The 2009-2019 stretch was bad enough that more than half of all renter households were already cost-burdened. The post-2020 acceleration pushed the share higher than it had been in the entire 15-year window.
The 30% threshold isn’t a rhetorical device. It’s a federal standard, established by HUD in the 1980s and used today to determine eligibility for housing assistance programs:
In Whatcom, 2024:
The cost-burden test exists because, above 30%, households start cutting other necessities. Food, transportation, healthcare, savings. Severely cost-burdened households (≥50%) are typically one shock — a car repair, a medical bill, a missed paycheck — away from housing instability.
9,800 Whatcom renter households are in that zone. That’s larger than the entire population of most Whatcom towns outside Bellingham.
Roughly 1 in 3.5 Whatcom renter households spends half or more of its income on rent.** And it’s not a new development. The share has been between 26.5% and 31.3% every single year since 2009. The total severely cost-burdened renter count grew from 8,448 in 2009 to 9,800 in 2024 — an additional 1,352 households trapped in the half-of-income-on-rent zone.
Excluding college-dominant counties (Whitman/WSU at 37.2%, Kittitas/CWU at 28.9%), Whatcom has the highest severely-burdened renter share in Washington. King County, with home values $274,000 higher, sits at 21.5%. Snohomish at 23.6%. Pierce at 23.3%. Whatcom: 28.7%.
| Year | Severely burdened (≥50%) | % of renters |
|---|---|---|
| 2009 | 8,448 | 29.6% |
| 2014 | 9,334 | 31.3% |
| 2019 | 8,808 | 26.7% |
| 2024 | 9,800 | 28.7% |
This 15-year stability is the part that should not be overlooked. The 57.3% cost-burden number is the slow-moving headline. The 28.7% severely-burdened number is the persistent emergency — and it has been hovering around 30% the whole time. 9,800 Whatcom renter households are one shock away from housing instability right now, the same as in 2009.
The housing affordability conversation in Whatcom tends to lead with median home prices and the mortgage-payment math — and rightly so, given that homes more than doubled in value over the period. But the cost-burden data captures something the home-price data can’t:
If Whatcom’s home values are 32% lower than King County’s, but Whatcom renters are 12 points more likely to be cost-burdened, then the constraint isn’t price. The constraint is income relative to what’s available to rent.
That has direct policy implications:
HUD’s 2026 Area Median Income for the Bellingham MSA (4-person family basis) is $123,300. By HUD’s own thresholds, “low income” is anyone making 80% of that — $98,640 for a 4-person household.
Whatcom’s 2024 median household income (all sizes) is $81,784. That means the median Whatcom household earns 66% of the HUD AMI — qualifying as “low income” by HUD’s definition. The median household, by federal housing-policy standards, is income-eligible for housing assistance.
That’s not a small accounting note. It’s the bottom line of every number in this post.
This analysis pulls from county_housing_history in Real Housing Reform Initiative’s Azure SQL database — 624 rows covering all 39 Washington counties for ACS5 vintages 2009-2024. The data refreshes annually with a single command: python3 ingest_wa_county_housing.py.
The same table will power upcoming endpoints in our unified data API, so members and researchers can query cost-burden, tenure, median-rent, and home-value series for any Washington county without ever needing to navigate Census.gov.
The point isn’t the database. The point is that the 57% figure should not have required a database query. It should have been on the front page of every housing-policy conversation Whatcom has had for the past 15 years. It hasn’t been, because Census ACS housing tables are not user-friendly. We made them user-friendly. The number is what it is.
county_housing_history and county_income_history tables in the RHRI Azure SQL database. Ingest scripts: Real Briefings Setup/HubSpot/scripts/ingest_wa_county_housing.py and ingest_wa_county_income.py.renters_cost_burdened_30, owners_cost_burdened_30) sum the four ACS bins for 30-34.9%, 35-39.9%, 40-49.9%, and 50%+. Severe cost burden (_severely_burdened_50) is the 50%+ bin only.