Naperville building & ADU permits
Recent permit activity, updated continuously.
Naperville is Chicago's largest western suburb, in DuPage County, and permits independently of the City of Chicago. Its permit records split the street address across separate fields, which Igni recomposes, and carry a work class naming single-family homes, additions and decks alongside the declared valuation.
Igni is tracking 400 residential and building permits in Naperville, IL. The most active ZIP is 60540. The most recent filing Igni tracked was Sep 1, 2026. All records come from City of Naperville (ArcGIS), an official government open-data feed, and are refreshed continuously.
400
Permits tracked
0
ADU permits
4
Distinct ZIP codes
Sep 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 |
|---|---|---|---|---|
| 60563 | Residential | — | $1,200 | Aug 12, 2026 |
| 60565 | Residential | — | $83,484 | Aug 12, 2026 |
| 60565 | Residential | — | $50,000 | Aug 12, 2026 |
| 60564 | Residential | — | $4,000 | Aug 12, 2026 |
| 60565 | Residential | — | $16,873 | Aug 12, 2026 |
| 60540 | Commercial | — | $150,000 | Aug 12, 2026 |
| 60564 | Residential | — | $1,032,636 | Aug 12, 2026 |
| 60540 | Commercial | — | $46,000,000 | Aug 12, 2026 |
| 60565 | Residential | — | $97,515 | Aug 12, 2026 |
| 60565 | Residential | — | $10,000 | Aug 13, 2026 |
| 60565 | Residential | — | $12,500 | Aug 13, 2026 |
| 60540 | Residential | — | $600 | Aug 13, 2026 |
| 60565 | Residential | — | $70,000 | Aug 13, 2026 |
| 60563 | Residential | — | $5,000 | Aug 13, 2026 |
| 60540 | Commercial | — | $19,400 | Aug 13, 2026 |
| 60564 | Commercial | — | $9,754 | Aug 13, 2026 |
| 60565 | Residential | — | $3,500 | Aug 13, 2026 |
| 60565 | Residential | — | $12,757 | Aug 13, 2026 |
| 60563 | Residential | — | $18,865 | Aug 13, 2026 |
| 60563 | Residential | — | $24,860 | Aug 14, 2026 |
Top ZIP codes by recent activity
Permit activity in Naperville
Igni counted 2,751 permits issued in Naperville over the last 12 months (Sep 2025 – Aug 2026) — roughly flat (+0.1%) on the 2,748 in the 12 months before. The forecast expects about 1,235 over the next 6 months.
Forecast: seasonal naive, typical error ±19% in backtests one to six months ahead. How we forecast
| Permit type | Last 12 months | Year over year | Forecast, next 6 months |
|---|---|---|---|
| All permits | 2,751 | Flat (+0.1%) | ≈ 1,235 |
| Residential building | 1,400 | Up 6.6% | ≈ 702 |
| Commercial building | 357 | —* | — |
| Trade (electrical, plumbing, mechanical) | 994 | Flat (+0.5%) | ≈ 264 |
| ADU | 0 | — | — |
* No year-over-year figure: the source's volume for this permit type stepped up within the last two years — likely a change in what the city publishes — so the two 12-month windows are not comparable.
Monthly figures
| Month | Permits | 10th–90th percentile |
|---|---|---|
| Sep 2023 | 317 | — |
| Oct 2023 | 251 | — |
| Nov 2023 | 152 | — |
| Dec 2023 | 85 | — |
| Jan 2024 | 47 | — |
| Feb 2024 | 85 | — |
| Mar 2024 | 143 | — |
| Apr 2024 | 447 | — |
| May 2024 | 291 | — |
| Jun 2024 | 362 | — |
| Jul 2024 | 241 | — |
| Aug 2024 | 388 | — |
| Sep 2024 | 314 | — |
| Oct 2024 | 282 | — |
| Nov 2024 | 183 | — |
| Dec 2024 | 169 | — |
| Jan 2025 | 173 | — |
| Feb 2025 | 178 | — |
| Mar 2025 | 192 | — |
| Apr 2025 | 273 | — |
| May 2025 | 288 | — |
| Jun 2025 | 234 | — |
| Jul 2025 | 249 | — |
| Aug 2025 | 213 | — |
| Sep 2025 | 295 | — |
| Oct 2025 | 355 | — |
| Nov 2025 | 180 | — |
| Dec 2025 | 173 | — |
| Jan 2026 | 102 | — |
| Feb 2026 | 130 | — |
| Mar 2026 | 200 | — |
| Apr 2026 | 269 | — |
| May 2026 | 258 | — |
| Jun 2026 | 262 | — |
| Jul 2026 | 302 | — |
| Aug 2026 | 225 | — |
| Sep 2026 (forecast) | ≈ 295 | 200–386 |
| Oct 2026 (forecast) | ≈ 355 | 238–472 |
| Nov 2026 (forecast) | ≈ 180 | 111–247 |
| Dec 2026 (forecast) | ≈ 173 | 105–240 |
| Jan 2027 (forecast) | ≈ 102 | 68–143 |
| Feb 2027 (forecast) | ≈ 130 | 89–181 |
Counts are permits issued per calendar month as Naperville 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 Naperville?
Based on 7,929 Naperville permits applied for between Sep 2023 and Jun 2026, the typical (median) permit was issued 27 days after application, and the middle half of permits took 15–50 days. One in ten took longer than 112 days.
| Permit type | Median | Typical range | Permits |
|---|---|---|---|
| All permits | 27 days | 15–50 days | 7,929 |
| Residential building | 31 days | 19–56 days | 3,811 |
| Commercial building | 49 days | 16–111 days | 906 |
| Trade (electrical, plumbing, mechanical) | 19 days | 12–34 days | 3,212 |
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 — Illinois
Accessory dwelling units in Illinois are regulated locally; there is no statewide ADU mandate, with Chicago running its own ADU ordinance.
Illinois has no statewide upzoning law; residential density is set by local zoning.
Data source
Sourced from City of Naperville (ArcGIS). Public records (IL FOIA).
Nearby cities — Illinois
Learn more about ADUs & building permits
Background reading on accessory dwelling units, building permits, and how Igni turns Naperville permit records into leads.
Naperville permit data — FAQ
Where does Igni get Naperville permit data?
How fresh is Naperville permit data?
How long does it take to get a building permit in Naperville?
Is construction activity growing in Naperville?
Does Naperville allow accessory dwelling units (ADUs)?
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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.