About this chart
This chart counts the active listings for single-family detached homes on ARMLS in one ZIP code, not counting UCB / CCBS listings (under contract but still marked active). Each point is the reading on the 1st of the month. Rising inventory gives buyers more choice; falling inventory favors sellers.
Each year has its own line, laid out by month, so you can compare this year with earlier years at the same point in the season. Pick any of 149 ZIP codes from the ZIP Code list (it opens on 85003); the last three years are ticked to start with, and you can tick any year back to 2006.
Hover over a line to see the exact figure for that month.