Electrical permit history — 603 N 3rd Av

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603 N 3rd Av

Built 1916 — pre-1950 knob-and-tube era · last permitted panel/service work 2023 (finaled) · HVAC 2010 (finaled)

Permanent link: Electrical permit history for 603 N 3rd Av (aztucsonelectricalsolutions.com/property/117040590/603-n-3rd-av-tucson-az-85705) · Public records last checked 2026-08-17

Parcel

117040590

Built

1916 (county record)

Jurisdiction

Tucson

Zoning

HR-2

Assessor use

Sfr Grade 010-3 Urban Subdivided

Parcel size

0.15 acres

Living area

1,582 sq ft (assessor record)

Cooling

Evaporative (assessor record)

Heating

Forced Air (assessor record)

Roof

Prepared Roll (assessor record)

Garage

Garage (2-car) (assessor record)

Sewer

No connection on file (sewer or septic status not confirmed by the record — verify on site)

Flood zone

X — minimal flood hazard (FEMA)

Historic preservation

West University Historic District — Historic Preservation Zone — Contributing (City of Tucson)

Typical original service for a 1916 home

approximately 30–60 A

Service on record

City records show the 2023 permit was finalized; the permit description states “Roof-mounted solar PV installation. (11.157) kW AC (12.180) kW DC (28) modules (28) micro-inverters MPU from 100A to 225A is required.” — 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 & panelCurrentLast permitted 2023 (3 years ago). The permit describes an increase in capacity, which is the single best sign the electrical has actually been brought forward. SD-1023-00116 — Roof-mounted solar PV installation. (11.157) kW AC (12.180) kW DC (28) modules (28) micro-inverters MPU from 100A to 225A is required.
• Heating & coolingLikely dueLast permitted 2010 (16 years ago). City inspection record: MECHANICAL - FINAL approved 2010-03-24. Contractor of record: CATALINA AIR CONDITIONING,*C. The assessor records cooling as Evaporative and heating as Forced Air. Cooling equipment works 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. T10ME00077 — REPLACE: 125K BTU FURNACE (APA)
• Water heaterNot in this windowNothing in the permit records we read for this parcel that names this system. Water heaters are frequently swapped without a permit, so this line is especially weak evidence either way.
• RoofNot in this windowNothing in the permit records we read for this parcel that names this system. The assessor records the roof as Prepared Roll.
• Plumbing work on recordNot in this windowNothing in the permit records we read for this parcel that names this system. Unremarkable — plenty of buildings never need a permitted plumbing repair.

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

  Knob-and-tube wiring may still be present in original, un-remodeled areas. It has no ground and is not rated for modern loads or insulation contact. The permit record does not confirm this; an on-site inspection is required.

• Era-based check — high priority

  Original services this age were 30–60 A fuse panels. Nearly every one still in place is undersized for a modern household. The permit record does not confirm this; an on-site inspection is required.

• Era-based check — high priority

  Branch circuits from this era are typically ungrounded two-wire — the reason you see two-prong outlets or ungrounded three-prong replacements. The permit record does not confirm this; an on-site inspection is required.

• Worth confirming

  Solar was permitted here in 2026. 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.

Most recent permit on record for this parcel: 2026-06-05 (TR-UTL-0626-00949) — Zayo (ADB Companies) to install conduit/fiber along City of Tucson ROW for an estimated 5,024 LF. Zayo Handholes to be installed every 2,000 LF. New Permit submittal for expired permit TR-UTL-0226-00226..

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.

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.