ADU (Accessory Dwelling Unit) permit in Allen, TX
Yes — you need a permit for adu (accessory dwelling unit) work in Allen.
| Permit needed? | Yes |
|---|---|
| Where the line falls | No size threshold in the code |
| Fee | Устанавливается городским fee schedule (App. C); отдельно взимается plan review fee (IRC 109.2.1). Числовой ставки в коде нет. |
| Review time | Not in the ordinance |
| Code section | IRC 105.2 (as amended) — новая жилая единица не входит в список исключений (освобождены лишь навесы ≤120 кв.фт) |
| Based on | IRC 2021 as amended (Allen Ord. 3919-6-22, Sec. 3.05) |
How to pull the permit
- Put together a site plan showing where the work goes, with dimensions.
- Apply through the Allen building department.
- Pay the permit fee when the permit is issued. Work done before that isn't covered.
- Book each inspection listed on the permit as the job reaches that stage.
Either of you can pull it. When a contractor does the work, it is normally their job.
If you skip it
Работы без разрешения влекут спецрасследование и investigation fee, равный сумме пошлины, дополнительно к самой пошлине (IRC 109.8.1, Sec. 3.05).
Nearby cities, same job
Rules stop at the city line. If your lot is near a boundary, or you work across several towns, this is where they differ.
| City | Distance | Permit? | Where the line falls |
|---|---|---|---|
| Allen | — | Yes | No size threshold in the code |
| Plano | 6 mi | Yes | Building a garage apartment, casita, or other accessory d… |
| McKinney | 6 mi | Yes | No size threshold in the code |
| Richardson | 10 mi | Yes | No size threshold in the code |
| Lewisville | 18 mi | Yes | No size threshold in the code |
| Mesquite | 25 mi | Yes | New accessory dwelling unit; also requires a Conditional … |
Other work in Allen
Questions people ask
How much does a adu (accessory dwelling unit) permit cost in Allen?
Устанавливается городским fee schedule (App. C); отдельно взимается plan review fee (IRC 109.2.1). Числовой ставки в коде нет.. Valuation-based fees mean the number depends on what the job is worth, so the department quotes it when you apply.
I already built it without a permit. What now?
Allen can issue a stop-work order and require you to apply after the fact, sometimes with an extra fee. Work that was covered up may have to be opened for inspection. Full walkthrough here.
Does unpermitted work cause problems when selling the house?
Often, yes. A buyer's inspector or the title company may flag it, and lenders can balk at financing a home with open or missing permits. What to do about it.