ZIP 21710 vs ZIP 21704

21710 is one of 28 ZIP codes that lie mostly in Frederick County, MD.

Shaded by typical home value, it ranks 3 of the 23 with a value.

1 school location in 21710: 1 elementary.

In alphabetical order: Carroll Manor Elementary. Locations only — no ratings are shown here.

21704 is one of 28 ZIP codes that lie mostly in Frederick County, MD.

Shaded by typical home value, it ranks 4 of the 23 with a value.

3 school locations in 21704: 3 elementary.

In alphabetical order: Centerville Elementary, Sugarloaf Elementary, Urbana Elementary. Locations only — no ratings are shown here.

In January 2000 the typical home in 21710 was worth $237,479.

Values peaked at $662,563 in December 2025. The latest reading is −0.6% from that peak.

As of August 2026: $658,402, 0.0% over twelve months.

Start with the typical home: $658,402. Put 20% down and borrow $526,722 at 7.40%, the 30-year fixed average as of October 8, 2026.

That is $3,647 a month in principal and interest.

The median household here earns $164,727 a year, $13,727 a month. So the payment takes 26.6% of income — rated “affordable” (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 9.6% 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 $1,422.

In December 2020, with rates at 2.68%, it was $1,619.

By August 2026, at 6.67%, it was $3,387 — +109% since December 2020, while the home's value moved +32%.

Reported values rose +177% 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 $468,689. So the real change is +40%, not +177%.

21710: +177% since January 2000.

Frederick County: +189% since January 2000.

Maryland: +180% since January 2000 — 21710 ran behind it by 3 points.

Owning the typical home costs about $4,305 a month once taxes and insurance (estimated at 1.2% of price a year) are added. Renting runs about $2,614 a month.

Price divided by a year's rent: 21.0. Lotvox reads under 15 as favoring buying and 20 or more as favoring renting.

In January 2000 the typical home in 21704 was worth $239,476.

Values peaked at $652,948 in December 2025. The latest reading is −0.7% from that peak.

As of August 2026: $648,649, −0.2% over twelve months.

Start with the typical home: $648,649. Put 20% down and borrow $518,919 at 7.40%, the 30-year fixed average as of October 8, 2026.

That is $3,593 a month in principal and interest.

The median household here earns $164,457 a year, $13,705 a month. So the payment takes 26.2% of income — rated “affordable” (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 9.7% 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 $1,434.

In December 2020, with rates at 2.68%, it was $1,584.

By August 2026, at 6.67%, it was $3,337 — +111% since December 2020, while the home's value moved +33%.

Reported values rose +171% 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 $472,631. So the real change is +37%, not +171%.

21704: +171% since January 2000.

Frederick County: +189% since January 2000.

Maryland: +180% since January 2000 — 21704 ran behind it by 10 points.

Owning the typical home costs about $4,242 a month once taxes and insurance (estimated at 1.2% of price a year) are added. Renting runs about $2,998 a month.

Price divided by a year's rent: 18.0. Lotvox reads under 15 as favoring buying and 20 or more as favoring renting.

Homes sold: about 4 a month in August 2026 (Redfin).

The 2015–2019 level for the same month was 6 — so sales ran at 67% of it, and below it in 17 of the last 24 months.

Across Frederick County, builders pulled permits for 1,168 new homes in 2025.

Of those, 70% 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 32 a month (Redfin, 3-month rolling data through August 2026). That is 91% of the 2015–2019 level for the same months.

On the shelf — homes for sale at the end of the period: 72.

Going out — closed sales: about 23 a month. That is 63% of the 2015–2019 level for the same months. The drain is drawn 18% narrower: the share of homes for sale that sell each month is 82% of its 2015–2019 level.

The ladder: homes for sale ÷ monthly sales = 3.1 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 9 more homes came on than sold each month, so inventory is growing. The basin is filling.

Homes sold: about 23 a month in August 2026 (Redfin).

The 2015–2019 level for the same month was 26 — so sales ran at 88% of it, and below it in 23 of the last 24 months.

Across Frederick County, builders pulled permits for 1,168 new homes in 2025.

Of those, 70% were in 1-unit buildings (the Census Bureau's category for detached and attached single homes).

This ZIP sits in Frederick County. IRS tax returns for 2022-2023: among the ten counties sending the most households, 5,021 moved in. Among the ten receiving the most, 3,461 moved out.

Net across those counties: +1,560 households. Beside it, homes for sale in this ZIP: 15 in June 2026.

Most arrivals came from Montgomery, MD (2,352 households); most departures went to Washington, MD (953).

This ZIP sits in Frederick County. IRS tax returns for 2022-2023: among the ten counties sending the most households, 5,021 moved in. Among the ten receiving the most, 3,461 moved out.

Net across those counties: +1,560 households. Beside it, homes for sale in this ZIP: 72 in June 2026.

Most arrivals came from Montgomery, MD (2,352 households); most departures went to Washington, MD (953).