Detroit building & ADU permits
Recent permit activity, updated continuously.
Detroit is Michigan's largest city, setting ADU rules locally in a state with no statewide mandate. Igni sources Detroit permits from the city's BSEED open data under its GO DATA policy, normalizing the free-text use column into Igni's residential, commercial, and ADU categories.
Igni is tracking 3,738 residential and building permits in Detroit, MI — including 4 classified accessory-dwelling-unit (ADU) filings. The most active ZIP is 48221. The most recent filing Igni tracked was Nov 1, 2026. All records come from data.detroitmi.gov — BSEED (ArcGIS), an official government open-data feed, and are refreshed continuously.
3738
Permits tracked
4
ADU permits
29
Distinct ZIP codes
Nov 1, 2026
Newest permit
Recent permits
A sample of the freshest permits in this jurisdiction — ZIP and city only (no street addresses).
| ZIP | Permit type | ADU type | Valuation | Applied |
|---|---|---|---|---|
| 48235 | Residential | — | $17,937 | Oct 26, 2026 |
| 48227 | Other | — | $20,000 | Oct 5, 2026 |
| 48234 | Other | — | $20,000 | Oct 5, 2026 |
| 48223 | Residential | — | $37,146 | Oct 1, 2026 |
| 48234 | Residential | — | $8,965 | Oct 26, 2026 |
| 48210 | Other | — | $5,000 | Jul 23, 2026 |
| 48235 | Residential | — | $2,635 | Oct 26, 2026 |
| 48214 | Residential | — | $19,750 | Oct 26, 2026 |
| 48204 | Residential | — | $15,228 | Oct 30, 2026 |
| 48201 | Residential | — | $413,789 | Oct 19, 2026 |
| 48235 | Residential | — | $15,953 | Oct 30, 2026 |
| 48223 | Residential | — | $8,500 | Sep 21, 2026 |
| 48224 | Residential | — | $2,500 | Oct 30, 2026 |
| 48221 | Residential | — | $7,300 | Oct 30, 2026 |
| 48224 | Residential | — | $5,269 | Oct 30, 2026 |
| 48226 | Other | — | $6,900,000 | Aug 3, 2026 |
| 48235 | Residential | — | $19,260 | Oct 30, 2026 |
| 48209 | Residential | — | $1,155 | Oct 26, 2026 |
| 48205 | Residential | — | $9,000 | Oct 15, 2026 |
| 48228 | Residential | — | $24,482 | Oct 30, 2026 |
Top ZIP codes by recent activity
Permit activity in Detroit
Igni counted 6,034 permits issued in Detroit over the last 12 months (Oct 2025 – Sep 2026) — down 5.7% on the 6,396 in the 12 months before. The forecast expects about 2,871 over the next 6 months.
Forecast: Holt–Winters, typical error ±10% in backtests one to six months ahead. How we forecast
| Permit type | Last 12 months | Year over year | Forecast, next 6 months |
|---|---|---|---|
| All permits | 6,034 | Down 5.7% | ≈ 2,871 |
| Residential building | 5,054 | Down 1.4% | ≈ 2,422 |
| Commercial building | 430 | Down 23.1% | ≈ 203 |
| Trade (electrical, plumbing, mechanical) | 15 | — | — |
| ADU | 4 | — | — |
Monthly figures
| Month | Permits | 10th–90th percentile |
|---|---|---|
| Oct 2023 | 611 | — |
| Nov 2023 | 656 | — |
| Dec 2023 | 482 | — |
| Jan 2024 | 474 | — |
| Feb 2024 | 459 | — |
| Mar 2024 | 480 | — |
| Apr 2024 | 681 | — |
| May 2024 | 618 | — |
| Jun 2024 | 542 | — |
| Jul 2024 | 714 | — |
| Aug 2024 | 693 | — |
| Sep 2024 | 580 | — |
| Oct 2024 | 701 | — |
| Nov 2024 | 479 | — |
| Dec 2024 | 516 | — |
| Jan 2025 | 469 | — |
| Feb 2025 | 459 | — |
| Mar 2025 | 469 | — |
| Apr 2025 | 441 | — |
| May 2025 | 593 | — |
| Jun 2025 | 582 | — |
| Jul 2025 | 574 | — |
| Aug 2025 | 614 | — |
| Sep 2025 | 499 | — |
| Oct 2025 | 638 | — |
| Nov 2025 | 495 | — |
| Dec 2025 | 450 | — |
| Jan 2026 | 333 | — |
| Feb 2026 | 386 | — |
| Mar 2026 | 442 | — |
| Apr 2026 | 605 | — |
| May 2026 | 463 | — |
| Jun 2026 | 554 | — |
| Jul 2026 | 597 | — |
| Aug 2026 | 557 | — |
| Sep 2026 | 514 | — |
| Oct 2026 (forecast) | ≈ 628 | 506–765 |
| Nov 2026 (forecast) | ≈ 513 | 413–633 |
| Dec 2026 (forecast) | ≈ 444 | 334–543 |
| Jan 2027 (forecast) | ≈ 423 | 370–518 |
| Feb 2027 (forecast) | ≈ 408 | 376–490 |
| Mar 2027 (forecast) | ≈ 455 | 420–544 |
Counts are permits issued per calendar month as Detroit publishes them to its open-data feed — not a complete census; a change in what the city publishes moves them too. The current month is left out, and the most recent months are provisional. A forecast is a statistical estimate with a range, not a prediction for any project. Informational only.
How long do permits take in Detroit?
Based on 17,379 Detroit permits applied for between Nov 2023 and Aug 2026, the typical (median) permit was issued 11 days after application, and the middle half of permits took 4–30 days. One in ten took longer than 80 days.
| Permit type | Median | Typical range | Permits |
|---|---|---|---|
| All permits | 11 days | 4–30 days | 17,379 |
| Residential building | 8 days | 3–19 days | 14,390 |
| Commercial building | 53 days | 26–101 days | 1,368 |
| Trade (electrical, plumbing, mechanical) | 50 days | 33–107 days | 33 |
Typical, not guaranteed: individual permits vary with project scope, application completeness and plan-review workload. Days are calendar days from application to issuance; applications still pending are counted as not-yet-issued rather than dropped. Informational only, not legal advice. How we calculate approval times.
Housing law — Michigan
Accessory dwelling units in Michigan are regulated locally; with no statewide ADU mandate, rules vary by city and county.
Michigan has no statewide upzoning law; residential density is governed by local zoning.
Data source
Sourced from data.detroitmi.gov — BSEED (ArcGIS). Public records (Detroit GO DATA, EO 2015-2).
Learn more about ADUs & building permits
Background reading on accessory dwelling units, building permits, and how Igni turns Detroit permit records into leads.
Detroit permit data — FAQ
Where does Igni get Detroit permit data?
How fresh is Detroit permit data?
How long does it take to get a building permit in Detroit?
Is construction activity growing in Detroit?
Does Detroit allow accessory dwelling units (ADUs)?
Get permit leads — Detroit
Fresh, filterable residential and ADU permit leads from Detroit — delivered before your competitors even know.
Informational only, not legal advice. Headline counts reflect all permits Igni has tracked for this jurisdiction; the table shows recent activity. Housing law changes — verify current statutes before relying on this.