Updated May 2026 · Redfin · 3-month window
01821 Real Estate Market Update: Billerica, MA, May 2026
The latest housing-market numbers for ZIP code 01821 in Billerica, Massachusetts, for May 2026, from the Redfin Data Center. ZIP-level figures are a rolling three-month window.
| Metric | Value | MoM | YoY |
|---|---|---|---|
| Median sale price | $675K | ▼ -0.4% | ▼ -4.9% |
| Days on market | 19 | ▼ -5.0% | ▲ +11.8% |
| Homes for sale | 39 | ▲ +2.6% | ▲ +11.4% |
| Sale-to-list | 104.1% | ▲ +1.2% | ▲ +0.6% |
| Homes sold | 50 | ▲ +38.9% | ▼ -26.5% |
Figures from the Redfin Data Center ZIP-code tracker (rolling 3-month window, not seasonally adjusted). Verify against your MLS before posting. Not a valuation for a specific home.
What the 01821 numbers say
The 01821 ZIP in Billerica is cooling. The median sale price sits at $675,000, 4.9% below last year. Homes here move fast: a typical listing goes under contract in about 19 days, and sellers are getting 104.1% of list price.
Based on 50 recent sales, 01821 is currently an active market.
What this means if you sell in 01821
Use these figures to set expectations early. Lead a listing appointment with the median price and the 19-day pace, show the year-over-year direction, and frame 01821 as an active market. Buyers and sellers trust an agent who knows their exact ZIP, not just the metro average.
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Build the Billerica post →Frequently asked: the 01821 housing market
- What is the median home price in ZIP 01821 (Billerica, MA)?
- As of May 2026, the median sale price in ZIP 01821 is $675,000 (-4.9% year over year), per the Redfin Data Center. Figures are a rolling 3-month window for this ZIP code.
- Is ZIP 01821 a buyer's or seller's market right now?
- ZIP 01821 is currently an active market, based on a 104.1% sale-to-list ratio, about 19 days on market for May 2026.
- How long do homes take to sell in ZIP 01821?
- A typical listing in 01821 goes under contract in about 19 days as of May 2026. Always verify against your local MLS before quoting figures to clients.
- Where does this 01821 market data come from?
- All figures come from the Redfin Data Center ZIP-code market tracker, a rolling 3-month window refreshed monthly. LOKAL turns them into a ready-to-post carousel, story and square graphic. LOKAL is not affiliated with Redfin.
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Data: Redfin · Redfin Data Center (ZIP-code market tracker). Figures are a ZIP-level 3-month snapshot, not a valuation for a specific home.