Electrical permit history — 50 E Blacklidge Dr

Commercial property

50 E Blacklidge Dr

Built 1934 — 1930s commercial stock · last permitted panel/service work 1999 (finaled)

Permanent link: Electrical permit history for 50 E Blacklidge Dr (aztucsonelectricalsolutions.com/property/107121100/50-e-blacklidge-dr-tucson-az-85705) · Public records last checked 2026-08-17

Parcel

107121100

Built

1934 (county record)

Jurisdiction

Tucson

Zoning

C-2

Assessor use

Plant Nursery Retail/Wholesale Only

Parcel size

0.85 acres

Building area

4,269 sq ft (assessor record)

Sewer

Connection on file (1960) (county sewer connection records)

Flood zone

X — minimal flood hazard (FEMA)

Historic preservation

Not on file (City of Tucson HP layers)

Service on record

City records show the 1999 permit was finalized; the permit description states “UPGRADE:ELECTRIC 60AMP TO 200AMP” — an increase in capacity as described, not a confirmed installed rating.

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 & distributionGetting onLast permitted 1999 (27 years ago). The permit describes an increase in capacity, which is the single best sign the electrical has actually been brought forward. 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. T99EL00718 — UPGRADE:ELECTRIC 60AMP TO 200AMP
• Heating, cooling & mechanicalNot in this windowNothing in the permit records we read for this parcel that names this system. Worth knowing: a 2025 commercial building permit is on file — work like this is often folded into a larger permit without being named, so open that record and check its scope before concluding anything. 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.
• RoofNot in this windowNothing in the permit records we read for this parcel that names this system. Roof age matters electrically too: it sets what can be penetrated for new rooftop units, conduit, or solar.

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.

Most recent permit on record for this parcel: 2026-02-06 (TR-UTL-0226-00223) — Zayo Contractor ADB Companies to install conduit/fiber via Directional Bore and open trench for an estimated 5,283 LF. Zayo Handholes to be installed every 2,000 LF for future access and maintenance. 04/20/2026 - Request for 90 Day Renewal as of 05/05/2026.

Permit history (11)

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 (4)

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.