ZIP 80421

80421 is one of 10 ZIP codes that lie mostly in Park County, CO — 98% of its own area is in the county.

Shaded by typical home value, it ranks 4 of the 10 with a value.

Mapped in and around 80421: 39 places to go — 14 day trips, 7 trails, 7 dining.

3 school locations in 80421: 1 elementary, 1 middle, 1 high.

In alphabetical order: Deer Creek Elementary School, Fitzsimmons Middle School, Platte Canyon High School. Locations only — no ratings are shown here.

In January 2000 the typical home in 80421 was worth $155,849.

Values peaked at $568,457 in July 2022. The latest reading is −4.2% from that peak.

As of August 2026: $544,582, −1.1% over twelve months.

Start with the typical home: $544,582. Put 20% down and borrow $435,666 at 7.40%, the 30-year fixed average as of October 8, 2026.

That is $3,016 a month in principal and interest.

The median household here earns $105,617 a year, $8,801 a month. So the payment takes 34.3% of income — rated “stretched” (Lotvox ZIP bands: under 28% affordable · 28–36% stretched · 36%+ severe).

The line holds today's rate fixed and moves only the price: at that rate, the same share was 9.8% in 2000.

Take the typical home's price each month, borrow 80% at that month's actual 30-year average rate: in January 2000 (8.21%) the payment was $933.

In December 2020, with rates at 2.68%, it was $1,391.

By August 2026, at 6.67%, it was $2,802 — +101% since December 2020, while the home's value moved +27%.

Reported values rose +249% since January 2000.

General prices (CPI-U) rose +97% over the same span.

Divide one by the other: in August 2026 dollars, the 2000 home was worth $307,584. So the real change is +77%, not +249%.

80421: +249% since January 2000.

Park County: +235% since January 2000.

Colorado: +199% since January 2000 — 80421 ran ahead of it by 51 points.

Owning the typical home costs about $3,561 a month once taxes and insurance (estimated at 1.2% of price a year) are added. Renting runs about $2,850 a month.

Price divided by a year's rent: 15.9. Lotvox reads under 15 as favoring buying and 20 or more as favoring renting.

Picture the Listings Flow Ladder as a basin: new listings pour in from the faucet, the homes for sale are the water, and closed sales run out the drain. Coming in — new listings: about 32 a month (Redfin, 3-month rolling data through August 2026). That is 86% of the 2015–2019 level for the same months.

On the shelf — homes for sale at the end of the period: 90.

Going out — closed sales: about 21 a month. That is 76% of the 2015–2019 level for the same months. The drain is drawn 17% narrower: the share of homes for sale that sell each month is 83% of its 2015–2019 level.

The ladder: homes for sale ÷ monthly sales = 4.2 months of supply — inside the 4–6 month balanced range. In the basin, that is the water level against the shaded balanced band.

The net reading: about 10 more homes came on than sold each month, so inventory is growing. The basin is filling.

Homes sold: about 21 a month in August 2026 (Redfin).

The 2015–2019 level for the same month was 26 — so sales ran at 81% of it, and below it in 21 of the last 24 months.

Across Park County, builders pulled permits for 152 new homes in 2025.

Of those, 100% were in 1-unit buildings (the Census Bureau's category for detached and attached single homes).

This ZIP sits in Park County. IRS tax returns for 2022-2023: among the ten counties sending the most households, 454 moved in. Among the ten receiving the most, 316 moved out.

Net across those counties: +138 households. Beside it, homes for sale in this ZIP: 90 in June 2026.

Most arrivals came from Jefferson, CO (154 households); most departures went to Jefferson, CO (95).

County assessor records list 4,038 properties with a market value here. Their average assessed market value is $561,584; the typical home value is $544,582.

The assessor average sits +3.1% from the market figure — an average against a typical value, so treat it as a check, not a verdict.