Residential Alteration
Single-family renovations, additions, kitchen/bath remodels.
1.1M permits classified across 15 metros
Browse residential alteration permits in Los Angeles →What it covers
Residential alteration permits cover changes to existing single-family homes — renovations, additions, kitchen and bath remodels, basement finishes, and similar work on detached residential structures. The highest-frequency residential segment by volume; tracks both DIY-permit activity and contractor-driven remodel cycles.
How a permit lands in Residential Alteration.
Every silver permit flows through a two-stage classifier. The deterministic stage maps the structured signals — work_class, the normalized permit type, and the building sub-type — into the segment vocabulary where the mapping is unambiguous. The machine-learning stage handles the cases that aren't direct lookups: multi-vocab permit-type strings, ambiguous occupancy spans, and jurisdictions that bundle categories. The segment is the classifier's output, the same axis across every metro — so residential_alteration means the same thing in NYC as in LA even though the upstream jurisdictions emit completely different raw permit-type strings.
When the signal genuinely isn't there, we say so. A row with no assignable segment degrades honestly — to its work-nature, then to its raw source type, and only to “Unclassified” when truly nothing is known. We never guess a segment to fill a gap; an honest Unclassified is the floor, and field-level data-quality flags surface when the classifier had low confidence. That restraint is the point — the classification is only worth selling on if the “don't know” is honest.
Residential Alteration by metro
Where residential alteration permits are classified today, ranked by volume. Metros with recent activity link straight into the live browse; the rest show their all-time classified count.
- Los Angeles →597K
- Columbus →169K
- Cleveland →136K
- Charlotte →97K
- Baltimore →41K
- Detroit →33K
- Tucson →14K
- San Jose →11K
- Phoenix →10K
- Norfolk8,195
- Nashville →7,136
- San Francisco →4,526
- New York City →3,981
- Louisville →2,464
- Denver →250
Recent residential alteration permits
Real permits classified into Residential Alteration in the last 30 days.
- 3901 HENDRON RDAlteration / Residential$9K2026-07-02Columbus
- 19700 Goddard StAlteration / Residential$21K2026-07-02Detroit
- 17174 Pennington AveAlteration / Residential$25K2026-07-02Detroit
- 20012 Roselawn StAlteration / Residential$5K2026-07-02Detroit
- 20515 Griggs StAlteration / Residential$3K2026-07-02Detroit
- 20095 Stout StAlteration / Residential$18K2026-07-02Detroit
Who tracks Residential Alteration.
Residential Alteration is a sales-intelligence segment for manufacturers and distributors selling into residential remodels and new homes. Filter it by metro, rank the contractors pulling these permits, and see the projects worth selling into — the same way across every covered market.