# Building permits at 5257 E Diamond Ave, Mesa, AZ

5257 E Diamond Ave, Mesa has 2 building permits on record. The most recent, opened Sep 23, 2025, is for electrical: Convert 200-amp service to a 400-amp service at existing SFR. Permit for electrical work only. No longer up-sizing water meter.

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Sep 23, 2025 | Electrical | Convert 200-amp service to a 400-amp service at existing SFR. Permit for electrical work only. No longer up-sizing water meter. | – | [PMT25-16793](https://nearbypermits.com/mesa/permit/PMT25-16793/) |
| Nov 15, 2022 | Addition | Add 948 SqFt detached Mother In Law structure to rear of property. | – | [PMT22-19484](https://nearbypermits.com/mesa/permit/PMT22-19484/) |

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Source: Mesa Development Services permit data (https://citydata.mesaaz.gov/d/dzpk-hxfb). Checked 2026-10-02 03:59 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/