ZIP 20904

20904 is one of 48 ZIP codes that lie mostly in Montgomery County, MD — 98% of its own area is in the county.

Shaded by typical home value, it ranks 26 of the 36 nearby ZIPs shown.

9 school locations in 20904: 7 elementary, 1 middle, 1 high.

In alphabetical order: Burnt Mills Elementary, Cannon Road Elementary, Galway Elementary, Greencastle Elementary, and more on the ZIP page. Locations only — no ratings are shown here.

In January 2000 the typical home in 20904 was worth $206,553.

Values peaked at $592,407 in March 2025. The latest reading is −1.7% from that peak.

As of August 2026: $582,157, −0.9% over twelve months.

Start with the typical home: $582,157. Put 20% down and borrow $465,726 at 7.40%, the 30-year fixed average as of October 8, 2026.

That is $3,225 a month in principal and interest.

The median household here earns $93,322 a year, $7,777 a month. So the payment takes 41.5% of income — rated “severe” (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 14.7% 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 $1,237.

In December 2020, with rates at 2.68%, it was $1,589.

By August 2026, at 6.67%, it was $2,995 — +89% since December 2020, while the home's value moved +19%.

Reported values rose +182% 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 $407,654. So the real change is +43%, not +182%.

20904: +182% since January 2000.

Montgomery County: +182% since January 2000.

Maryland: +180% since January 2000 — 20904 ran ahead of it by 1 points.

Owning the typical home costs about $3,807 a month once taxes and insurance (estimated at 1.2% of price a year) are added. Renting runs about $1,930 a month.

Price divided by a year's rent: 25.1. 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 34 a month (Redfin, 3-month rolling data through August 2026). That is 68% of the 2015–2019 level for the same months.

On the shelf — homes for sale at the end of the period: 68.

Going out — closed sales: about 34 a month. That is 70% of the 2015–2019 level for the same months. The drain is drawn 3% narrower: the share of homes for sale that sell each month is 97% of its 2015–2019 level.

The ladder: homes for sale ÷ monthly sales = 2.0 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 0 more homes sold than came on each month, so inventory is shrinking. The basin is draining.

Homes sold: about 34 a month in August 2026 (Redfin).

The 2015–2019 level for the same month was 37 — so sales ran at 92% of it, and below it in 24 of the last 24 months.

Across Montgomery County, builders pulled permits for 1,411 new homes in 2025.

Of those, 57% were in 1-unit buildings (the Census Bureau's category for detached and attached single homes).

This ZIP sits in Montgomery County. IRS tax returns for 2022-2023: among the ten counties sending the most households, 12,327 moved in. Among the ten receiving the most, 15,047 moved out.

Net across those counties: −2,720 households. Beside it, homes for sale in this ZIP: 68 in June 2026.

Most arrivals came from Prince George's, MD (3,735 households); most departures went to Prince George's, MD (3,823).