Method, in full
How we decide something is an infill
Everything on this site that carries the word "infill" got there through the same test, applied the same way to every MLS® record. No editorial judgement, no builder's word for it. 308 of 486 listings pass. Here is the whole method, including what it gets wrong.
Why listings are excluded
| Reason | Listings |
|---|---|
| Outside the inner-city ring or not an infill housing form | 78 |
| Established inner-city home | 78 |
| Inner-city land | 22 |
What this test gets wrong
Two known failure modes, both in the direction of under-counting. A gut renovation that kept the original foundation can carry a new construction date and pass as infill when it is really a renovation. And a genuinely new house whose listing carries the original build year — which happens more often than you would think — fails and is excluded. We accept both rather than guess, because the alternative is a badge that means nothing.
The other limit is scope. This site covers the inner city from $1,000,000 up, so infill below that price is not put to this test regardless of how obviously it would qualify.