Real Estate Investing in Black Diamond, Washington (98010)

Everything the listing leaves out — vacancy, rent trend, cap rate, landlord climate. All free.

King County • Population: 6,351 • Data updated: September 2026

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Should you buy in 98010 (Black Diamond, WA)? Our answer, based on the numbers below.

🏠 For Homebuyers
MIXED
Grade C (61/100)

Mixed — home prices are stretched relative to local incomes. Run the math on your specific situation.

📈 For Investors
MIXED
3.0 / 5 (47/100)

A middle-of-the-road market. Workable, but the best opportunities may be nearby ZIPs rather than this one.

⚠️ Risks to Know
1 flag
  • Tenant-protective state: Landlord rating 1.0/5 — slower evictions, more regulations.

What’s happening in Black Diamond, WA (98010)?

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3.0/ 5

Investability

Overall investment appeal

2.0/ 5

Appreciation

Long-term value growth

3.0/ 5

Cashflow ROI

Rental yield potential

Avg Home Value $771,686
Avg Monthly Rent $2,954
1% Rule ✗ Does Not Meet
Median Income $141,579
% Renters 13.3%

Market Analysis: 98010 Black Diamond

Stepping back, ZIP 98010 has challenges — vacancy pressure, softer price growth, and tenant stability concerns sit alongside the $772K median. It rewards specialists, not generalists.

Stepping back, the numbers look inviting — $772K purchase price, 0.0% nominal cap — the work to hit that pro forma in 98010 is substantial and deserves full respect.

ZIP 98010's metrics run below King County's averages on price growth and tenant stability. Investors who ignore that regional gap tend to relearn it the hard way.

Resident income in 98010 sits below the county median. That reality colors rent collection, vacancy, and reinvestment math in ways that outside investors often underestimate.

leans the ZIP is not uninvestable, but it is unforgiving. Section 8 landlords, local operators, and specialized value-add funds are the investor types that tend to succeed.

Explore the Data — Click a Tab Below
🏦 Current 30-yr Fixed Mortgage Rate: 6.76% as of Sep 10 Source: Freddie Mac PMMS

Here's what matters if you're considering buying a home in Black Diamond:

C+ Average
Buy Confidence Score: 62/100
Affordability
10/25
Appreciation
18/25
Stability
9/20
Timing
10/15
Rental backup
15/15
Affordability
Expensive
Homes cost 5.5× the median income
Value Trend
Declining (-2.0%)
How home values changed in the past year
Rental Backup
Strong
Could rent for $2,954/mo if you need to move
Market Conditions
COOL
More inventory, negotiating room for buyers
Bottom Line: Mixed signals in this market. Research specific properties carefully and be prepared to negotiate.
❄️
COOL MARKET
Seattle-Tacoma-Bellevue, WA Metro Area
More inventory, negotiating room for buyers
45 days
Average time to sell
Average
11.2%
Listings with price cuts
Few Cuts
0.0%
Sale price vs asking
Below Ask
0.0%
Income needed for mortgage
Affordable
📅 Market conditions as of August 29, 2026 — updated weekly from Seattle-Tacoma-Bellevue, WA metro data
🏠

Property Strategy for 98010

Which property type performs best in this market?

Best for Cash Flow
3BR
3.6% cap rate
Best for Appreciation
4BR
+6.8% 5yr CAGR
Best Overall Value
5BR
$190,861/bedroom
📊 Compare All Property Types →
Type Median Value Est. Rent Cap Rate 5yr CAGR $/Bedroom
2BR $712,454 $2,640 2.7% +5.3% $356,227
3BR $683,817 $3,450 3.6% +6.7% $227,939
4BR $846,422 $4,060 3.5% +6.8% $211,606
5BR $954,306 +6.3% $190,861

Market Trends

Home Value History (with trend line)

$844K$720K$596K$472K$348K$224KJul 2006Jul 2016Jul 2026

Rent History (with trend line)

$2,999$2,868$2,736$2,605$2,473$2,342Jan 2025Oct 2025Jul 2026

📊 How Does 98010 Compare?

Metric 98010 Black Diamond Seattle-Tacoma-Bellevue, WA Washington
Home Value $771,686 $771,686 N/A $591,536
5-Year CAGR 3.2% 3.2% N/A 5.9%
Avg Rent $2,954 $2,954 N/A -
Cap Rate 3.0% 3.0% - -
💡 Why Invest in 98010? Click to expand

With a 3/5 investability rating, this ZIP shows solid fundamentals for buy-and-hold investors.

📊 See where this ZIP ranks in our Best-of lists →
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Landlord Ground Truth

Real numbers from people who own or manage rentals in ZIP 98010 (Black Diamond, WA). Anonymous, moderated, never written by AI.

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Property managers serving King County

Manage rentals here? List your business →

Alki Property Management LLC specializes in apartment rentals. summary from their website

Small multifamily
Unclaimed — is this your business? Claim it free

Brink Property Management offers residential property management and vacant home management services in Bellevue, providing marketing, tenant screening, rent collection, and maintenance. summary from their website

Single-familySmall multifamily
Unclaimed — is this your business? Claim it free

Full Service Property Management offers compassionate property management across Metro Seattle, including multi-family management, property marketing, and maintenance services. summary from their website

Single-familySmall multifamily
Unclaimed — is this your business? Claim it free

Listings are shown for convenience — Repit doesn’t endorse or vet these companies. Ratings shown come only from email-verified visitors.

Investability
Good
Cap Rate
3.0%
Low
5yr Growth
+3.2%
Moderate

📊 Market Snapshot

Home Value $771,686
Monthly Rent $2,954
Price-to-Rent 21.8:1
1% Rule ✗ Fails

💰 Return Metrics

Gross Yield 4.6%
Cap Rate 3.0%
5-Year IRR 6.2%

📈 Home Appreciation

1-Year -2.0% ▼
3-Year CAGR +2.6% ▲
5-Year CAGR +3.2% ▲
10-Year CAGR +6.7% ▲

🏠 Rent Trends

1-Year +8.9% ▲
3-Year CAGR N/A
5-Year CAGR N/A
Negative Leverage — IRR / Tax Play Cap Rate: 3.0%  |  30yr Rate: 6.8%
Leverage reduces cash returns at current rates.

The current 30-yr mortgage rate (6.8%) exceeds the estimated cap rate (3.0%). Financing reduces your cash-on-cash return below the cap rate. Markets like this may still make sense as IRR plays — factoring in appreciation, depreciation, and a future refinance when rates drop.

Run an IRR Analysis →

⚠️ Risk Signals

Composite view of factors that can impact a ZIP's stability and your downside risk.

Vacancy
3.9%
Low risk
Landlord Climate
1.0/5
Protective
Value Trend (5yr)
+3.2%
Stable
Eviction process: Slow Rent control: Unfavorable

Demographics in 98010

Population: 6,351

💰 Median Household Income
$141,579
This area
$141,579
State
$83,286
USA
$74,580
🏠 Renter Occupied
13.3%
This area
13.3%
State
29.3%
USA
34.0%
💼 Unemployment Rate
0.7%
This area
0.7%
State
-13.7%
USA
3.7%
🎓 College Educated
54.3%
This area
54.3%
State
10.6%
USA
33.7%
👤 Median Age
41.0 years
This area
41.0 years
State
10.2 years
USA
38.9 years
🏚️ Vacancy Rate
3.9%
This area
3.9%
State
14.9%
USA
10.5%
👥 Population by Ethnicity
White 82.4%
Other/Mixed 11.0%
Hispanic/Latino 8.0%
Asian 6.0%
Black/African American 0.7%
👶 Under 18
23.3%
This area
23.3%
USA
22.0%
👴 65 and Over
12.9%
This area
12.9%
USA
17.3%
📊 Poverty Rate
0.0%
This area
0.0%
USA
11.5%

Crime & Safety

🚧

Crime & Safety Data Coming Soon

We're integrating comprehensive crime statistics including violent crime rates, property crime, and safety scores to help you make informed investment decisions.

Expected: Q1 2025

🎓 Schools in 98010

A Avg School Grade
2 Schools
16.6:1 Avg Class Size
$19,776 Avg Per Pupil

Schools in This ZIP Code

A Very Good

Black Diamond Elementary

📚 K – 05 Elementary
👥
412 Students
👨‍🏫
15.9:1 Class Size
💰
$19,771 Per Student
A Very Good

Sawyer Woods Elementary School

📚 Pre-K – 05 Elementary
👥
331 Students
👨‍🏫
17.2:1 Class Size
💰
$19,780 Per Student
About Repit School Scores

Traditional school ratings rely heavily on standardized test scores, which often reflect family income more than school quality. Repit takes a different approach.

We evaluate schools based on factors that research shows actually impact educational outcomes:

  • Class Size — Smaller classes mean more individual attention
  • School Funding — Resources available for programs, staff, and facilities
  • Community Factors — Neighborhood characteristics that influence student success
  • School Environment — Size, type, and structure

Scores are updated annually using federal education data.

🎓 Nearby Colleges & Universities

5 Nearby 9,368 Off-Campus Students
C+
Green River College
7,361 students · 8.1 mi
C
KaiStar
151 students · 14.1 mi
D
Pima Medical Institute-Renton
400 students · 14.6 mi
C+
Renton Technical College
3,060 students · 14.7 mi
C+
Highline College
5,126 students · 15.0 mi

Investor Insight: With 9,368 students living off-campus nearby, this area has strong rental demand from the college population.

Frequently Asked Questions

How does Black Diamond, WA stack up for property investment?

Black Diamond, WA registers an investability rating of 3.0/5, with median home values near $772K and average rents around $2,954/mo. That combination puts it in the robust tier for investor interest.

What do landlords charge for rent in Black Diamond, WA?

Rent in Black Diamond, WA is around $2,954/mo. The resulting rent-to-value relationship with $772K pricing is reasonable for most investor models.

How quickly do rentals get leased in Black Diamond, WA?

Black Diamond, WA carries elevated vacancy risk. Expect measured absorption at market rents of $2,954/mo.

Is WA a landlord-friendly state?

The landlord environment in Black Diamond, WA is tenant-protective. Statewide rules shape most day-to-day operations for rental owners.

Are renters plentiful in Black Diamond, WA?

Working renters make up the core of the Black Diamond, WA tenant base. The pool is reasonable for investors targeting long-term holds.

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How 98010 ranks in Seattle-Tacoma-Bellevue, WA

Every ZIP in this metro, ranked. Free.

Cash Flow → Appreciation → Affordable →
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