Hartford building & ADU permits
Recent permit activity, updated continuously.
Hartford is Connecticut's state capital. Under the state's Public Act 21-29, ADUs are as-of-right in single-family zones unless a town opted out — so local rules vary widely. Hartford publishes its permits under a clean CC0 public-domain license, which Igni ingests and classifies for ADU activity.
Igni is tracking 2,295 residential and building permits in Hartford, CT — including 1 classified accessory-dwelling-unit (ADU) filing. The most active ZIP is 06106. The most recent filing Igni tracked was Nov 3, 2026. All records come from Open Data Hartford (ArcGIS), an official government open-data feed, and are refreshed continuously.
2295
Permits tracked
1
ADU permits
6
Distinct ZIP codes
Nov 3, 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 |
|---|---|---|---|---|
| 06120 | Commercial | — | $50,000 | Nov 2, 2026 |
| 06112 | Commercial | — | $600 | Nov 2, 2026 |
| 06112 | Residential | — | $7,000 | Nov 2, 2026 |
| 06112 | Commercial | — | $600 | Nov 2, 2026 |
| 06112 | Residential | — | $21,529 | Nov 2, 2026 |
| 06120 | Commercial | — | $15,000 | Nov 2, 2026 |
| 06114 | Residential | — | $9,340 | Nov 2, 2026 |
| 06114 | Commercial | — | $11,355 | Nov 2, 2026 |
| 06120 | Commercial | — | $650 | Nov 2, 2026 |
| 06120 | Commercial | — | $11,500 | Nov 2, 2026 |
| 06112 | Residential | — | $9,458 | Nov 2, 2026 |
| 06114 | Commercial | — | $1,500 | Nov 2, 2026 |
| 06106 | Commercial | — | $500 | Nov 2, 2026 |
| 06120 | Commercial | — | $20,000 | Nov 2, 2026 |
| 06120 | Residential | — | $19,000 | Nov 2, 2026 |
| 06103 | Commercial | — | $3,000 | Nov 2, 2026 |
| 06106 | Commercial | — | $991,261 | Nov 2, 2026 |
| 06103 | Commercial | — | $25,000 | Oct 31, 2026 |
| 06106 | Commercial | — | $800 | Nov 1, 2026 |
| 06114 | Commercial | — | $18,000 | Nov 1, 2026 |
Top ZIP codes by recent activity
Permit activity in Hartford
Igni counted 3,986 permits issued in Hartford over the last 12 months (Oct 2025 – Sep 2026) — down 8.4% on the 4,350 in the 12 months before. The forecast expects about 1,992 over the next 6 months.
Forecast: trailing mean, typical error ±12% in backtests one to six months ahead. How we forecast
| Permit type | Last 12 months | Year over year | Forecast, next 6 months |
|---|---|---|---|
| All permits | 3,986 | Down 8.4% | ≈ 1,992 |
| Residential building | 621 | Down 18.6% | ≈ 273 |
| Commercial building | 639 | Up 33.1% | ≈ 318 |
| Trade (electrical, plumbing, mechanical) | 2,653 | Down 12.4% | ≈ 1,326 |
| ADU | 2 | — | — |
Monthly figures
| Month | Permits | 10th–90th percentile |
|---|---|---|
| Oct 2023 | 483 | — |
| Nov 2023 | 394 | — |
| Dec 2023 | 365 | — |
| Jan 2024 | 407 | — |
| Feb 2024 | 416 | — |
| Mar 2024 | 455 | — |
| Apr 2024 | 358 | — |
| May 2024 | 457 | — |
| Jun 2024 | 275 | — |
| Jul 2024 | 565 | — |
| Aug 2024 | 476 | — |
| Sep 2024 | 468 | — |
| Oct 2024 | 389 | — |
| Nov 2024 | 344 | — |
| Dec 2024 | 372 | — |
| Jan 2025 | 394 | — |
| Feb 2025 | 245 | — |
| Mar 2025 | 326 | — |
| Apr 2025 | 355 | — |
| May 2025 | 340 | — |
| Jun 2025 | 300 | — |
| Jul 2025 | 476 | — |
| Aug 2025 | 400 | — |
| Sep 2025 | 409 | — |
| Oct 2025 | 378 | — |
| Nov 2025 | 297 | — |
| Dec 2025 | 382 | — |
| Jan 2026 | 327 | — |
| Feb 2026 | 276 | — |
| Mar 2026 | 344 | — |
| Apr 2026 | 364 | — |
| May 2026 | 339 | — |
| Jun 2026 | 259 | — |
| Jul 2026 | 317 | — |
| Aug 2026 | 388 | — |
| Sep 2026 | 315 | — |
| Oct 2026 (forecast) | ≈ 332 | 246–360 |
| Nov 2026 (forecast) | ≈ 332 | 247–358 |
| Dec 2026 (forecast) | ≈ 332 | 243–359 |
| Jan 2027 (forecast) | ≈ 332 | 243–360 |
| Feb 2027 (forecast) | ≈ 332 | 243–361 |
| Mar 2027 (forecast) | ≈ 332 | 242–362 |
Counts are permits issued per calendar month as Hartford 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 Hartford?
Based on 12,085 Hartford permits applied for between Nov 2023 and Aug 2026, the typical (median) permit was issued 19 days after application, and the middle half of permits took 9–42 days. One in ten took longer than 83 days.
| Permit type | Median | Typical range | Permits |
|---|---|---|---|
| All permits | 19 days | 9–42 days | 12,085 |
| Residential building | 20 days | 8–42 days | 2,005 |
| Commercial building | 29 days | 14–63 days | 1,429 |
| Trade (electrical, plumbing, mechanical) | 17 days | 8–38 days | 8,436 |
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 — Connecticut
Connecticut's Public Act 21-29 (2021) makes accessory dwelling units permitted as-of-right in single-family zones, but let municipalities opt out by a two-thirds vote — and a majority of towns did, so whether an ADU is as-of-right depends heavily on the specific town.
Connecticut has no statewide 'missing middle' zoning law in force; a 2025 omnibus housing bill (HB 5002) with transit-oriented and middle-housing provisions was vetoed, leaving density to local zoning.
Data source
Sourced from Open Data Hartford (ArcGIS). CC0 — public domain (commercial use permitted).
Learn more about ADUs & building permits
Background reading on accessory dwelling units, building permits, and how Igni turns Hartford permit records into leads.
Hartford permit data — FAQ
Where does Igni get Hartford permit data?
How fresh is Hartford permit data?
How long does it take to get a building permit in Hartford?
Is construction activity growing in Hartford?
Does Hartford allow accessory dwelling units (ADUs)?
Get permit leads — Hartford
Fresh, filterable residential and ADU permit leads from Hartford — 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.