ZIP 80129 vs ZIP 80109

80129 is one of 14 ZIP codes that lie mostly in Douglas County, CO — 99% of its own area is in the county.

Shaded by typical home value, it ranks 11 of the 14 with a value.

Mapped in and around 80129: 86 places to go — 38 dining, 14 parks & open space, 14 trails.

7 school locations in 80129: 5 middle, 2 high.

In alphabetical order: Ben Franklin Academy, Coyote Creek Elementary School, Ranch View Middle School, Saddle Ranch Elementary School, and more on the ZIP page. Locations only — no ratings are shown here.

80109 is one of 14 ZIP codes that lie mostly in Douglas County, CO.

Shaded by typical home value, it ranks 12 of the 14 with a value.

Mapped in and around 80109: 79 places to go — 19 parks & open space, 19 trails, 15 dining.

6 school locations in 80109: 5 middle, 1 high.

In alphabetical order: Aspen View Academy, Castle Rock Middle School, Castle View High School, Clear Sky Elementary, and more on the ZIP page. Locations only — no ratings are shown here.

In January 2000 the typical home in 80129 was worth $219,393.

Values peaked at $728,886 in June 2022. The latest reading is −8.7% from that peak.

As of August 2026: $665,342, −1.8% over twelve months.

Start with the typical home: $665,342. Put 20% down and borrow $532,274 at 7.40%, the 30-year fixed average as of October 8, 2026.

That is $3,685 a month in principal and interest.

The median household here earns $136,915 a year, $11,410 a month. So the payment takes 32.3% 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 10.7% 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 $1,314.

In December 2020, with rates at 2.68%, it was $1,747.

By August 2026, at 6.67%, it was $3,423 — +96% since December 2020, while the home's value moved +23%.

Reported values rose +203% 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 $432,995. So the real change is +54%, not +203%.

80129: +203% since January 2000.

Douglas County: +198% since January 2000.

Colorado: +199% since January 2000 — 80129 ran ahead of it by 5 points.

Against 476 Colorado ZIP codes, 80129 sits at the 62nd percentile for affordability (price vs local income).

30th for appreciation (recent value growth); 44th for rental yield (rent vs price).

Owning the typical home costs about $4,351 a month once taxes and insurance (estimated at 1.2% of price a year) are added. Renting runs about $2,286 a month.

Price divided by a year's rent: 24.3. Lotvox reads under 15 as favoring buying and 20 or more as favoring renting.

In January 2000 the typical home in 80109 was worth $221,022.

Values peaked at $706,954 in June 2022. The latest reading is −8.2% from that peak.

As of August 2026: $649,190, −1.5% over twelve months.

Start with the typical home: $649,190. Put 20% down and borrow $519,352 at 7.40%, the 30-year fixed average as of October 8, 2026.

That is $3,596 a month in principal and interest.

The median household here earns $148,417 a year, $12,368 a month. So the payment takes 29.1% 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 9.9% 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 $1,323.

In December 2020, with rates at 2.68%, it was $1,672.

By August 2026, at 6.67%, it was $3,340 — +100% since December 2020, while the home's value moved +26%.

Reported values rose +194% 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 $436,210. So the real change is +49%, not +194%.

80109: +194% since January 2000.

Douglas County: +198% since January 2000.

Colorado: +199% since January 2000 — 80109 ran behind it by 5 points.

Against 476 Colorado ZIP codes, 80109 sits at the 75th percentile for affordability (price vs local income).

35th for appreciation (recent value growth); 72nd for rental yield (rent vs price).

Owning the typical home costs about $4,245 a month once taxes and insurance (estimated at 1.2% of price a year) are added. Renting runs about $2,676 a month.

Price divided by a year's rent: 20.2. 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 44 a month (Redfin, 3-month rolling data through August 2026). That is 81% of the 2015–2019 level for the same months.

On the shelf — homes for sale at the end of the period: 80.

Going out — closed sales: about 37 a month. That is 64% of the 2015–2019 level for the same months. The drain is drawn 54% narrower: the share of homes for sale that sell each month is 46% of its 2015–2019 level.

The ladder: homes for sale ÷ monthly sales = 2.2 months of supply — below the 4–6 month range Lotvox treats as balanced. In the basin, that is the water level against the shaded balanced band.

The net reading: about 8 more homes came on than sold each month, so inventory is growing. The basin is filling.

Homes sold: about 37 a month in August 2026 (Redfin).

The 2015–2019 level for the same month was 48 — so sales ran at 77% of it, and below it in 24 of the last 24 months.

Across Douglas County, builders pulled permits for 2,398 new homes in 2025.

Of those, 61% were in 1-unit buildings (the Census Bureau's category for detached and attached single homes).

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 56 a month (Redfin, 3-month rolling data through August 2026). That is 79% of the 2015–2019 level for the same months.

On the shelf — homes for sale at the end of the period: 133.

Going out — closed sales: about 50 a month. That is 71% of the 2015–2019 level for the same months. The drain is drawn 36% narrower: the share of homes for sale that sell each month is 64% of its 2015–2019 level.

The ladder: homes for sale ÷ monthly sales = 2.7 months of supply — below the 4–6 month range Lotvox treats as balanced. In the basin, that is the water level against the shaded balanced band.

The net reading: about 6 more homes came on than sold each month, so inventory is growing. The basin is filling.

Homes sold: about 50 a month in August 2026 (Redfin).

The 2015–2019 level for the same month was 63 — so sales ran at 79% of it, and below it in 24 of the last 24 months.

Across Douglas County, builders pulled permits for 2,398 new homes in 2025.

Of those, 61% were in 1-unit buildings (the Census Bureau's category for detached and attached single homes).

This ZIP sits in Douglas County. IRS tax returns for 2022-2023: among the ten counties sending the most households, 10,326 moved in. Among the ten receiving the most, 7,977 moved out.

Net across those counties: +2,349 households. Beside it, homes for sale in this ZIP: 80 in June 2026.

Most arrivals came from Arapahoe, CO (4,025 households); most departures went to Arapahoe, CO (2,753).

County assessor records list 9,392 properties with a market value here. Their average assessed market value is $660,326; the typical home value is $665,342.

The assessor average sits −0.8% from the market figure — an average against a typical value, so treat it as a check, not a verdict.

Of 9,253 homes with a recorded purchase date, 31% have had the same owner for 20 years or more, and 21% changed hands in the last five.

12% are owned from a different mailing address, 3% from out of state.

This ZIP sits in Douglas County. IRS tax returns for 2022-2023: among the ten counties sending the most households, 10,326 moved in. Among the ten receiving the most, 7,977 moved out.

Net across those counties: +2,349 households. Beside it, homes for sale in this ZIP: 133 in June 2026.

Most arrivals came from Arapahoe, CO (4,025 households); most departures went to Arapahoe, CO (2,753).

County assessor records list 9,051 properties with a market value here. Their average assessed market value is $658,469; the typical home value is $649,190.

The assessor average sits +1.4% from the market figure — an average against a typical value, so treat it as a check, not a verdict.

Of 8,986 homes with a recorded purchase date, 14% have had the same owner for 20 years or more, and 28% changed hands in the last five.

11% are owned from a different mailing address, 4% from out of state.