Electrical permit history — 850 E Seneca St

Home

850 E Seneca St

Built 1951 — post-war 60–100 A service era · last permitted panel/service work 1999 (finaled)

Permanent link: Electrical permit history for 850 E Seneca St (aztucsonelectricalsolutions.com/property/123140440/850-e-seneca-st-tucson-az-85719) · Public records last checked 2026-08-17

Parcel

123140440

Built

1951 (county record)

Jurisdiction

Tucson

Zoning

NR-1

Assessor use

Sfr Grade 010-3 Urban Subdivided

Parcel size

0.22 acres

Living area

1,252 sq ft (assessor record)

Cooling

Refrigeration (assessor record)

Heating

Forced Air (assessor record)

Roof

Prepared Roll (assessor record)

Garage

Carport (1-car) (assessor record)

Sewer

Connection on file (1957) (county sewer connection records)

Historic preservation

Jefferson Park Historic District — National Register district (City of Tucson)

Typical original service for a 1951 home

approximately 60–100 A

Service on record

City records show the 1999 permit was finalized; the permit description states “UPGRADE:ELECTRIC 30 AMP TO 100 AMP” — 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 1999 (27 years ago). The permit describes an increase in capacity, which is the single best sign the electrical has actually been brought forward. T99EL02003 — UPGRADE:ELECTRIC 30 AMP TO 100 AMP
• Heating & coolingNot in this windowNothing in the permit records we read for this parcel that names this system. Worth knowing: a 2026 neighborhood preservation zone (npz) 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. 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

  60–100 A was standard. That is enough for a mid-century house, not for a modern kitchen, HVAC, and an EV. The permit record does not confirm this; an on-site inspection is required.

• Era-based check — high priority

  Federal Pacific (Stab-Lok) and Zinsco/Sylvania panels were sold through this period. Stab-Lok breakers have a documented history of failing to trip internally; Zinsco breakers can weld to the bus so the handle moves without breaking the circuit. In both cases a replacement breaker does not resolve it — the panel itself is what gets replaced. The permit record does not confirm this; an on-site inspection is required.

• Era-based check

  Grounded branch circuits did not become the norm until the early 1960s — much of the original wiring here is likely ungrounded. The permit record does not confirm this; an on-site inspection is required.

• Era-based check

  Cloth-jacketed NM cable is common in this era. The jacket embrittles with age and heat, particularly in Tucson attics. The permit record does not confirm this; an on-site inspection is required.

• Worth confirming

  An ADU or casita was permitted in 2026, which means load has already been added to this property. Whether there is headroom left for anything more depends on how that was fed — a subpanel off the existing service, or its own.

Recorded sales (1)

Recorded sales are the sales the Pima County Assessor has on file from affidavits of property value — not every transfer, not listings, and not a valuation. Parties are never shown here. A sale with no permitted electrical work since is worth knowing before the next sale or a remodel.

Most recent permit on record for this parcel: 2026-07-10 (TR-UTL-0726-01139) — wo#3323072 850 e seneca st 14 14 06 nw install water service east side of lot in dirt and asphalt 10LF/sc.

Permit history (6)

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 (8)

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.