01821 Billerica
224 active listings out of 13K total properties we track in ZIP 01821 (Billerica, MA) — listings, off-market homes, rentals, and full sales/tax history. Refreshed nightly.
Download Billerica 01821 property data
13,386 property records for ZIP 01821 — address, beds/baths, sqft, year built, status, list and last-sale price, price and tax history. Parquet or CSV.
Monthly snapshot · 1.9 MB Parquet · CSV (2.4 MB)
Records keep changing after a snapshot is compiled.
Rebuilt every day · same columns, same file layout
While you're here, take in the bigger picture — maps below show Boston metro, not just 01821. Same company, same dataset, different resolution.
Over the past 12 months, ZIP 01821 has recorded 240 home sales. In September 2026 there were28 sales (±0% vs the prior month). Most recent median sale price: $638K.
- Tracked
- 13K
- Active
- 224
- Median list
- $680K
- Sales (12mo)
- 240
Right now, 224 homes are actively for sale in ZIP 01821. Median list price is $680K at $398/sqft. Hover each hex for micro-neighborhood stats (median price, $/sqft, top property type).
- Tracked
- 13K
- Active
- 224
- Median list
- $680K
- Sales (12mo)
- 240
- Tracked
- 13K
- Active
- 224
- Median list
- $680K
- Sales (12mo)
- 240
- Tracked
- 13K
- Active
- 224
- Median list
- $680K
- Sales (12mo)
- 240
- Tracked
- 13K
- Active
- 224
- Median list
- $680K
- Sales (12mo)
- 240
- Tracked
- 13K
- Active
- 224
- Median list
- $680K
- Sales (12mo)
- 240
Inventory breakdown
Distribution of the 224 currently-active listings in ZIP 01821. Full dataset covers 13K properties — listings, off-market homes, rentals, and full history.
Get Billerica 01821 data in your app
GET https://api.straply.com/v1/markets/zip/01821
Authorization: Bearer $STRAPLY_KEY{
"zip": "01821",
"total_tracked": 13414,
"active": 224,
"median_list": 679900
}Nearby ZIP codes
Other Massachusetts ZIPs within a short drive of 01821.
ZIP 01821 · Billerica, MA real estate: market summary
As of November 2026, Straply tracks 13,414 homes in ZIP 01821 (Billerica, MA), with 224 active for sale at a median list price of $679,900 (~$398/sq ft). Notably, the market is cooling — the median sale price is down 8% year over year.
- Median list price
- $679,900
- Median $/sq ft
- $398
- Active listings
- 224
- Median sale price
- $637,500 (-8% YoY)
- Properties tracked
- 13,414
Frequently asked: ZIP 01821 · Billerica, MA real estate
What is the median home price in ZIP 01821?
The median list price in ZIP 01821 (Billerica, MA) is $679,900 (about $398 per square foot), based on 224 active listings tracked by Straply as of November 2026.
What price range are homes in ZIP 01821?
Active listings in ZIP 01821 (Billerica, MA) concentrate in: 43% $500k–$750k and 25% $750k–$1m.
Are home prices in ZIP 01821 going up or down?
The median sale price is $637,500, down 8% year over year. Straply tracked 240 sales here over the past 12 months.
How many homes are for sale in ZIP 01821?
Straply is tracking 224 active listings in ZIP 01821 (Billerica, MA) out of 13,414 properties on record as of November 2026.
How old are the homes in ZIP 01821?
Most homes in ZIP 01821 (Billerica, MA) were built in the 1960s. About 33% were built after 1980, while 11% predate 1940. The newest tracked home dates to 2026.
What types of homes are in ZIP 01821?
ZIP 01821 (Billerica, MA) is mostly single-family homes (74% of listings). Also common: condos 14%, townhouses 8%.
How many bedrooms do homes in ZIP 01821 typically have?
The most common size in ZIP 01821 (Billerica, MA) is 3 bd.
What areas are near ZIP 01821?
Nearby markets Straply also tracks include North Billerica 01862, Tewksbury 01876, Wilmington 01887, Burlington 01803.
Data as of November 2026. Source: Straply. For address-level history and programmatic access, use the Straply API.