ZIP Code · CO

ZIP 80104

Part of Castle Rock, CO

Pop. 38,479·Douglas County·37th most expensive ZIP in Colorado

Median rent (all units)

$2,339/mo

Year-over-Year

+1.2%

Month-over-Month

+0.1%

vs US Median

+$407

Reported rents

Stable (Monthly)

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Most AffordableMost Expensive

ZIP 80104 · $2,339

More expensive than 75% of US ZIP codes · National median $1,932/mo

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Medians by bedroom

Rent by unit size

Studio

$1,710

1 BR

$1,820

2 BR

$2,170

3 BR

$2,840

4 BR+

$3,170

Research median

$2,170/mo

Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).

Rent trends

12-month history

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Last updated: October 17, 2026

From the history

What the numbers show

Cheapest month to sign

February. Asking rents in ZIP 80104 usually run 1.4% below trend in February and 1.5% above it in July, about $68 a month apart at today's median. Based on 9 years of data.

Compared with the peak

Rent in ZIP 80104 is at its highest level since Zillow's records here began in January 2017.

Past year vs. the rest of Colorado

Rent in ZIP 80104 changed +1.2% over the year to September 2026. Across the 155 Colorado ZIP codes Zillow tracks, the typical change was +1.3%.

Rent vs. income since 2019

From 2019 to 2024, rent in ZIP 80104 rose 32% while median household income rose 31.1% ($102,500 to $134,335). Rent outpaced income.

Since before the pandemic

Rent in ZIP 80104 is 34.4% higher than in March 2020. Across the US, rent is up 37.3% over the same stretch.

Recent direction

Rent has risen 5 months in a row, and rose in 8 of the last 12 months.

What a typical income covers

30% of the median household income ($134,335) is $3,358 a month. That covers HUD's Fair Market Rent for up to a 4-bedroom ($3,170).

From Zillow's monthly rent index (ZORI) for ZIP 80104. The seasonal pattern compares Zillow’s seasonally adjusted and unadjusted series. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.

Annual cost

$28,068/yr

At $2,339/mo median

Location

CityCastle Rock

StateCO

CountyDouglas County

Rent Market Meter

Balanced Market

Renter's MarketBalancedLandlord's Market

Rents are roughly steady, with neither renters nor landlords holding a strong edge right now.

Based on rent-price momentum (+1.2% YoY, +0.1% MoM), not inventory.

Demographics

Who lives here

ZIP 80104 (Castle Rock, CO) is majority owner-occupied, has a median income above the national average, 55.8% of residents hold a bachelor's degree or higher.

Population

38,479

Median income

$134,335

Median age

38.2

Renters

20.6%

Age distribution

22.3%

23.1%

29%

14.3%

Under 1822.3%

18–3423.1%

35–5429%

55–6411.3%

65+14.3%

Gender

49.8%

50.2%

Male49.8%

Female50.2%

Race & ethnicity

80.9%

White80.9%

Black0.5%

Hispanic11.4%

Asian2.3%

Other4.8%

Education (25+)

13.5%

27.5%

55.8%

No HS diploma3.2%

HS diploma13.5%

Some college27.5%

Bachelor's+55.8%

Housing tenure

79.4%

20.6%

Owner79.4%

Renter20.6%

Source: U.S. Census Bureau · ACS 2024 5-Year Estimates

2021 vs 2026

How ZIP 80104 in Castle Rock, CO has changed in 5 years

Rent

$1,934 → $2,339

up 20.9%

Income

$108,758 → $134,335

up 23.5%

Population

33,991 → 38,479

up 13.2%

Renter share

21.7% → 20.6%

-1.1 pts

Bachelor's+

48.5% → 55.8%

+7.3 pts

Five years ago, renters in ZIP 80104 in Castle Rock, CO paid around $1,934 a month. That figure now sits near $2,339, up 20.9% from the 2021 baseline. Census figures show median household income at $134,335 today, compared with $108,758 five years earlier. Census counts show ZIP 80104 in Castle Rock, CO adding about 4,488 residents over the five-year window, up 13.2% on net. Bachelor's-degree-or-higher attainment moved from 48.5% to 55.8% across the same window. The combined trend lines point to a market that has changed measurably from where it stood in early 2021.

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About renting in ZIP 80104

Last updated: October 17, 2026

ZIP code 80104 covers Castle Rock, CO. The median rent here is $2,339/mo as of October 2026. A 1-bedroom rents for a median of $1,820/mo. A 2-bedroom rents for a median of $2,170/mo.

At 21% of local median household income ($134,335/yr), ZIP 80104 ranks as affordable compared to the national benchmark of 30%. Rents have increased 1.2% over the past year.

FAQ

Frequently asked questions

How much income do you need to rent in ZIP 80104?

To keep rent at or below 30% of gross income, you would need to earn at least $94,000/year (about $45/hour full-time) to afford the median rent of $2,339/mo in ZIP 80104. The local median household income is $134,335/yr, so the typical household meets that bar.

Is rent going up or down in ZIP 80104?

Rent in ZIP 80104 has risen 1.2% over the past year as of September 2026. That is the highest level since Zillow's records here began in January 2017.

When is the cheapest time to rent in ZIP 80104?

Asking rents in ZIP 80104 are usually lowest in February, about 1.4% below their yearly trend, and highest in July, about 1.5% above it. At today's median that is a gap of roughly $68 a month. This pattern comes from 9 years of Zillow rent data.

Has rent outpaced income in ZIP 80104?

Yes. From 2019 to 2024, rent in ZIP 80104 rose 32% while median household income rose 31.1%, from $102,500 to $134,335. Rent is Zillow's yearly average; income is the Census 5-year estimate for the same years.

How does ZIP 80104 compare to other ZIPs in Colorado?

ZIP 80104 is one of the pricier among Colorado ZIP codes for rent, ranking #37 of 168 at $2,339/mo. Over the year to September 2026, rent in ZIP 80104 changed +1.2%, against a typical +1.3% across the 155 Colorado ZIP codes Zillow tracks.