Electrical permit history — 300 N Main Av

Commercial property

300 N Main Av

Built 1924 — 1920s commercial stock · 8 permits on record; no permitted panel/service or HVAC work among them

Permanent link: Electrical permit history for 300 N Main Av (aztucsonelectricalsolutions.com/property/11619067c/300-n-main-av-tucson-az-85701) · Public records last checked 2026-08-16

Parcel

11619067C

Built

1924 (county record)

Jurisdiction

Tucson

Zoning

HO-3

Assessor use

Office Building 2 Story

Parcel size

0.35 acres

Building area

10,492 sq ft (assessor record)

Sewer

Connection on file (1978) (county sewer connection records)

Flood zone

X — minimal flood hazard (FEMA)

Historic preservation

El Presidio Historic District — Historic Preservation Zone — Contributing (City of Tucson)

See the property

Pima County orthophoto (Pictometry 2024 / PAG 2023 / NAIP 2023 mosaic) — parcel outlined in yellow. Aerials can predate recent work and show nothing about what is inside; context, not evidence.

Street ViewGoogle Maps satelliteGoogle Earth (3D, historical imagery) ↗

Is it time to upgrade?

• Electrical service & distributionNot in this windowNothing in the permit records we read for this parcel that names this system. That does not mean the gear is original — only that nothing has been permitted here recently. Where it matters is capacity: obsolete distribution lines carry breaker and fusible-switch lead times that turn an outage into a shutdown, and that is worth knowing before a new tenant or a new rooftop unit. Separately from replacement: NFPA 70E expects the arc-flash study to be reviewed at least every five years, or after any change to the service.
• Heating, cooling & mechanicalNot in this windowNothing in the permit records we read for this parcel that names this system. Packaged rooftop units work harder in Tucson than almost anywhere, so 12 to 15 years is a realistic service life rather than the 15 to 20 the industry quotes. Worth confirming from the equipment nameplate rather than the record. Replacing a rooftop unit is also an electrical question: the new unit's minimum circuit ampacity and its disconnect often differ from the old one.
• Fire alarm & life safetyNot in this windowNothing in the permit records we read for this parcel that names this system. Any alarm or sprinkler work here predates this feed. For an occupied commercial building that is worth confirming from the panel and the inspection tags rather than assuming.
• RoofCurrentLast permitted 2025 (1 year ago). Roof age matters electrically too: it sets what can be penetrated for new rooftop units, conduit, or solar. SD-0925-00149 — roof abatement, roof replacement

A found permit means a lot. A missing one means less. We read the City of Tucson’s own permit file, not a recent extract of it — back to about 2006, and into the 1990s on properties with that much history. Microfiche before then was never fully digitised. Every record links to the city’s official file. A blank line does not say nothing was done: work gets done without permits all the time. The only way to know what is actually installed is to look at it.

What that usually means electrically

• Era-based check — high priority

  Distribution gear this age is frequently past the point where the manufacturer still supports it. Breakers and fusible switches for obsolete lines can carry long lead times, which turns an outage into a shutdown. The permit record does not confirm this; an on-site inspection is required.

• Era-based check

  NFPA 70E expects arc-flash studies to be reviewed at least every five years, or after any change to the service. Buildings this age often have labeling that no longer matches the installed gear. The permit record does not confirm this; an on-site inspection is required.

• Routine

  Office and medical tenant improvements are usually limited by available panel spaces and branch circuit capacity, not by the service itself.

Most recent permit on record for this parcel: 2025-09-24 (TC-COM-0925-01752) — VOID: DS - Same permit type and scope of work as existing application permit TC-COM-0825-01489. Please resubmit under existing permit. If you made any changes to your plans, please resubmit your revised plans and a detailed revision narrative/comment response letter that clearly explains how you revised the plans and where the revisions can be found on the plan sheets. Step-by-Step instructions on how to resubmit: https://www.tucsonaz.gov/files/sharedassets/public/pdsd/documents/tdc-faq/new-pdfs/revisions-and-resubmittals.pdf For questions: Building_Official@tucsonaz.gov roof abatement, roof replacement.

Permit history (8)

How to read the status column: Final / Complete / C of O — city records show the permit was finalized. Issued — the work was permitted, but final completion is not confirmed. Applied / In review / Approved / Fees paid — proposed, not completion. Expired — the permit expired without a confirmed final status. Void / Withdrawn / Canceled — not evidence the work was installed. Any other status is shown exactly as the issuing office records it, without a completion reading.

Code enforcement (1)

Code cases and housing-code violations recorded against this parcel, by category. Closed cases stay on the record, and most of these are closed — check the status column. We show the category and the official record number rather than the complaint text, which often names people who have nothing to do with the property.

Record numbers link to the City of Tucson’s official file. Highlighted rows are the ones that imply electrical work or an unpermitted-work finding.

This is an inference from public records — the year a structure was built, how it is classified, and what has been permitted. It is not an inspection, and nothing here confirms what is actually installed at this address. The only way to know is to look in the panel. See an error in this public-record report? Report a correction · About this data.

The contractor’s read is a plain-English brief of the record above, written by AI — what it shows across electrical, mechanical and the building itself, what is missing for the era, and what to verify on site.