Electrical permit history — 12371 E Thunderhead Ranch Rd

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12371 E Thunderhead Ranch Rd

Built 1948 — pre-1950 knob-and-tube era · 13 permits on record; no permitted panel/service or HVAC work among them

Permanent link: Electrical permit history for 12371 E Thunderhead Ranch Rd (aztucsonelectricalsolutions.com/property/205680350/12371-e-thunderhead-ranch-rd-tucson-az-85747) · Public records last checked 2026-08-17

Parcel

205680350

Built

1948 (assessor record — effective construction year, which can move after a major remodel)

Jurisdiction

Unincorporated Pima County

Zoning

CR-1

Assessor use

Sfr Grade 010-3 Rural Subdivided

Parcel size

1.49 acres

Living area

2,244 sq ft (assessor record)

Cooling

Refrigeration (assessor record)

Heating

Forced Air (assessor record)

Roof

Prepared Roll (assessor record)

Pool

Yes (assessor record)

Garage

Garage (3-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)

Typical original service for a 1948 home

approximately 30–60 A

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 & panelNot in this windowNothing in the permit records we read for this parcel that names this system. Worth knowing: a 2024 addition / alteration permit is on file (and 1 more like it) — work like this is often folded into a larger permit without being named, so open that record and check its scope before concluding anything. That does not tell you the service is original — only that nothing has been permitted here recently. The build year is the better clue, and it is above.
• Heating & coolingNot in this windowNothing in the permit records we read for this parcel that names this system. Worth knowing: a 2024 addition / alteration permit is on file (and 1 more like it) — work like this is often folded into a larger permit without being named, so open that record and check its scope before concluding anything. The assessor records cooling as Refrigeration 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.
• 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. This parcel is in unincorporated Pima County, so we read the county’s own permit system — including its historical permits, which reach back into the 1990s where they exist. Every record links to the county’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

  The assessor records a pool on this parcel. Equipment bonding, the equipotential bonding grid and GFCI protection on the pump and light circuits are the usual findings on pool equipment — the pool-bonding rules in NEC Article 680 were expanded in the 2008 cycle, so a pool built before that is worth an on-site check.

Most recent permit on record for this parcel: 2026-05-27 (P24BP09961-03) — Single Family Residence Addition - Revision.

Permit history (13)

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 issuing office’s official file — Pima County’s portal for county permits, the City of Tucson’s for city records. 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.