Electrical permit history — 4520 N Stone Av

Electrical Property Screening Report · Commercial property

4520 N Stone Av

A screening report for electrical planning, assembled from public-record indicators. It is not an official record and every figure in it should be verified against the issuing agency before it is relied on.

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Built 1985 — 1980s commercial stock · last permitted panel/service work 2022 (finaled) · HVAC 2023 (finaled); a newer 2025 permit is issued · 1 open code case

Permanent link: Electrical permit history for 4520 N Stone Av (aztucsonelectricalsolutions.com/property/10511061r/4520-n-stone-av-tucson-az-85705) · Public records last checked 2026-08-22

Is it time to upgrade?

• Electrical service & distributionFinaled permit foundLast permitted 2022 (4 years ago). City inspection record: FIRE - ALARM FINAL approved 2022-09-29. Contractor of record: RED HAWK FIRE & SECURITY (CA) LLC. Worth reading the permit itself: it names the service but does not read as an increase in capacity, so this may have been a like-for-like replacement rather than an upgrade. 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. T22FC00533 — ADT commercial to install fire equipment for “Cotton On Kids” Store in Tucson Mall FMM-1, E90-24-MCC-FW, E90-24MCW-NW, FSP-951
• Heating, cooling & mechanicalFinaled permit foundA newer 2025 permit for the same system is recorded as “Issued” — The work was permitted, but final completion is not confirmed. The permit description states “HVAC replacement - like-for-like capacity”. Last permitted 2023 (3 years ago). City inspection record: COT - HCBU - Building Final approved 2024-05-24. 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. TC-COM-1123-02668 — Remodel of an existing Victoria's Secret store. Project includes demolition, plus new walls, ceilings, floor and wall finishes, new storefront, HVAC distribution, lighting, and restroom.
• Fire alarm & life safetyFinaled permit foundLast permitted 2025 (1 year ago). Panels and devices age out on their own schedule, and the code moves underneath them — a system that was compliant when installed is not automatically compliant now. TC-COM-1024-01945 — INTERIOR ALTERATIONS TO UNIT 240, 4500 N. ORACLE ROAD TUCSON, AZ. 85705 TO INCLUDE ARCHITECTURAL, STRUCTURAL, MECHANICAL, ELECTRICAL AND PLUMBING THE FOLLOWING SCOPE OF WORK WILL BE ISSUED AS A SEPARATE PERMIT: -FIRE SPRINKLER ALTERATIONS -FIRE ALARM -SIGNAGE THE FOLLOWING SCOPE OF WORK WILL BE ISSUED AS A DEFERRED SUBMITTAL: -MOBILE MEDIA RACKING
• RoofLikely dueLast permitted 2004 (22 years ago). Roof age matters electrically too: it sets what can be penetrated for new rooftop units, conduit, or solar. T04BU00258 — REROOF:PHASE 1 TUCSON MALL

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 digitized. 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

  A finaled 2022 panel/service permit is on record for this parcel, which makes it unlikely the original 100–150 A equipment is still in place. That is a permit record, not an inspection — verify the installed rating and the panel brand on site before sizing anything new. The permit record does not confirm this; an on-site inspection is required.

• 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.

• Worth looking at

  There is an open code enforcement case on this parcel. An open case can hold up a permit, and if it touches unpermitted work the electrical scope usually has to be brought up to code as part of resolving it.

• 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.

• Worth confirming

  A pool or spa was permitted in 2024. Pool equipment brings its own bonding grid, GFCI requirements, and usually a subpanel — and the bonding rules have tightened since, so older installations are worth verifying.

• Worth confirming

  Solar was permitted here in 2018. That means there is an existing interconnection, and the main breaker and busbar rating already carry a PV backfeed — so anything else you add (an EV charger, a heat pump) has to be checked against what is left under the 120% rule, not against the service size alone.

Solar and energy potential

Roof footprint

≈ 805,339 sq ft (county building-footprint layer, 3 structures; 1 neighbouring structure crossing the lot line excluded)

Usable for solar, planning estimate

≈ 563,700 sq ft (~70% after setbacks, rooftop equipment and access paths)

Array that could fit

on the order of 6,200 kW — roughly 15,500 panels (low-tilt ballasted rows, 400 W class modules)

Estimated annual production

≈ 10,200,000 kWh (PVWatts, Tucson sun, low-tilt south)

Energy-charge offset at TEP commercial rates

$816,000–$1,326,000 a year (8–13¢/kWh energy + power-supply charges, by season and rate class)

Planning-level arithmetic on the roof area above — not a shading study, a structural review or a design. The offset assumes the building uses the power as it is generated; TEP pays far less (its export rate is about 5¢/kWh) for surplus sent to the grid, so the load profile decides the real value. The 30% federal credit (§48E) still applies to commercial systems placed in service by the end of 2027 — projects that began construction by July 4, 2026 have longer; confirm timing with a tax adviser.

TEP grid capacityThis parcel is not inside any of the 11 areas TEP has mapped as saturated with distributed generation (the nearest, “Ina Rd and Thornydale Rd”, is about 4.6 miles away — TEP’s map set, July 2020). New generation still goes through TEP’s interconnection screens, and a heavy new load still merits a utility capacity check — the maps only mark where that review is most likely to bite.

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The record behind this read

Parcel

10511061R

Year constructed

1985 (county record)

Permitting authority

Tucson

Zoning

C-3

Property type

Super Regional Shop Ctr Enclosed Mall

Sewer

Connection on file (2017, 2018, 2025) (county sewer connection records)

Flood zone

X — minimal flood hazard (FEMA)

Service on record

City records show the 2022 permit was finalized; the permit description states “ADT commercial to install fire equipment for “Cotton On Kids” Store in Tucson Mall FMM-1, E90-24-MCC-FW, E90-24MCW-NW, FSP-951”.

The most recent permitted work on this parcel was in 2026. That says the parcel was worked on under permit, not what the work covered — a roof, a pool or a changeout tells you nothing about the electrical service. Work done without a permit leaves no trace here at all.

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.

Utility and upgrade pathElectric service here is Tucson Electric Power (TEP). A service or panel upgrade needs a TEP meter release and has to meet TEP’s service requirements — meter height and location, clearances, and the point of attachment. See TEP new-service requirements and the TEP standards notes.

In the public record: All commercial property · Commercial property in 85705 · Commercial & industrial reports · Homes in 85705 · Permit data by neighborhood

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.

What the flood note is not. The flood zone shown is FEMA’s National Flood Hazard Layer — the federal insurance map. Local floodplain mapping is not reproduced here; use the authority’s own map, linked above. Nothing here is a floodplain determination, an elevation certificate, or a substitute for one. A parcel can straddle a boundary, and a Letter of Map Amendment can remove a structure the map still covers. For a determination, ask the floodplain administrator for the jurisdiction named above; for a design that has to satisfy one, that is work we do.