Name: Inventory — ZIP 01821 All Residential, March 31, 2026
Creator: Range Ranger
Published: 2026-03-31
License: https://redfin.com/news/data-center

Question 1

How many homes are currently listed in Billerica (01821)?

Accepted Answer

20 All Residential homes were active in inventory in ZIP 01821 during the 90-day period ending 2026-03-31, based on Redfin data. Active inventory counts homes listed for sale that had not yet gone under contract or been withdrawn.

Question 2

What does active inventory in 01821 tell a seller about supply conditions?

Accepted Answer

Active inventory measures how many All Residential homes were competing for buyers in ZIP 01821 during the 90-day period ending 2026-03-31. Lower inventory means fewer choices for buyers and less competition among sellers. Higher inventory means more properties are available, giving buyers more options and increasing the pressure on individual sellers to compete on price and condition.

Question 3

How is active inventory in 01821 measured?

Accepted Answer

The active inventory count for ZIP 01821 is the number of All Residential homes listed for sale that had not yet gone under contract or been withdrawn during the 90-day period ending 2026-03-31. It measures the stock of available supply at a point in time — not the flow of new listings entering the market. Data source: Redfin.

Question 4

Is inventory in 01821 higher or lower than last year?

Accepted Answer

Active All Residential inventory in ZIP 01821 is up 33.3% compared to the same 90-day period one year ago, as of March 31, 2026. Rising inventory means more supply is available relative to last year; falling inventory means supply has tightened.

Question 5

How does active inventory compare to pending sales in 01821?

Accepted Answer

In ZIP 01821, 20 All Residential homes were active in inventory against 44 pending sales during the 90-day period ending 2026-03-31. Comparing active inventory to pending contracts gives a rough sense of buyer absorption — how much of the available supply is already under contract. A higher ratio of pending to inventory indicates strong buyer demand relative to available supply. Data source: Redfin.

Question 6

How does active inventory compare to homes sold in 01821?

Accepted Answer

In ZIP 01821, 20 All Residential homes were active in inventory while 38 closed during the 90-day period ending 2026-03-31. Comparing active inventory to closed sales gives a rough indication of market absorption — how quickly available supply is being converted to completed transactions. This is market-level context derived from closed transaction data — not a months-of-supply calculation. Data source: Redfin.

20 homes currently listed in 01821, up 33.3% from last year.