01821 Billerica
106 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.
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 302 home sales. Last month saw 2 sales (-93.3% vs the prior month). Most recent median sale price: $337K.
- Tracked
- 13K
- Active
- 106
- Median list
- $700K
- Sales (12mo)
- 302
Right now, 106 homes are actively for sale in ZIP 01821. Median list price is $700K at $378/sqft. Hover each hex for micro-neighborhood stats (median price, $/sqft, top property type).
- Tracked
- 13K
- Active
- 106
- Median list
- $700K
- Sales (12mo)
- 302
- Tracked
- 13K
- Active
- 106
- Median list
- $700K
- Sales (12mo)
- 302
- Tracked
- 13K
- Active
- 106
- Median list
- $700K
- Sales (12mo)
- 302
- Tracked
- 13K
- Active
- 106
- Median list
- $700K
- Sales (12mo)
- 302
- Tracked
- 13K
- Active
- 106
- Median list
- $700K
- Sales (12mo)
- 302
Inventory breakdown
Distribution of the 106 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": 13331,
"active": 106,
"median_list": 699900
}ZIP 01821 · Billerica, MA real estate: market summary
As of June 2026, Straply tracks 13,331 homes in ZIP 01821 (Billerica, MA), with 106 active for sale at a median list price of $699,900 (~$378/sq ft). Notably, the market is cooling — the median sale price is down 50% year over year.
- Median list price
- $699,900
- Median $/sq ft
- $378
- Active listings
- 106
- Median sale price
- $337,000 (-50% YoY)
- Properties tracked
- 13,331
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 $699,900 (about $378 per square foot), based on 106 active listings tracked by Straply as of June 2026.
What price range are homes in ZIP 01821?
Active listings in ZIP 01821 (Billerica, MA) concentrate in: 49% $500k–$750k and 19% $750k–$1m.
Are home prices in ZIP 01821 going up or down?
The median sale price is $337,000, down 50% year over year. Straply tracked 302 sales here over the past 12 months.
How many homes are for sale in ZIP 01821?
Straply is tracking 106 active listings in ZIP 01821 (Billerica, MA) out of 13,331 properties on record as of June 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 (77% of listings). Also common: townhouses 11%, condos 9%.
How many bedrooms do homes in ZIP 01821 typically have?
The most common size in ZIP 01821 (Billerica, MA) is 3 bd.
Data as of June 2026. Source: Straply. For address-level history and programmatic access, use the Straply API.