Electrical permit history — 4120 E 27th St

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4120 E 27th St

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.

Verify parcel data at official source ↗

Built 1958 — post-war 60–100 A service era · last permitted panel/service work 2021 (finaled)

Permanent link: Electrical permit history for 4120 E 27th St (aztucsonelectricalsolutions.com/property/130170100/4120-e-27th-st-tucson-az-85711) · Public records last checked 2026-08-19

Public record indicators for electrical planning

Parcel

130170100

Year constructed

1958 (county record)

Permitting authority

Tucson

Zoning

R-1

Lot size

0.21 acres

Sewer

Connection on file (1958) (county sewer connection records)

Historic preservation

Not on file (City of Tucson HP layers)

Estimated electrical service era

approximately 60–100 A (estimated from the year built, 1958 — not a measurement; verify on site)

Service on record

City records show the 2021 permit was finalized; the permit description states “upgrade electrical panel” — an increase in capacity as described, not a confirmed installed rating.

Is it time to upgrade?

• Electrical service & panelFinaled permit foundLast permitted 2021 (5 years ago). City inspection record: ELECTRIC - FINAL approved 2021-12-15. The permit describes an increase in capacity, which is the single best sign the electrical has actually been brought forward. T21CM07835 — upgrade electrical panel
• Heating & coolingNot in this windowNothing in the permit records we read for this parcel that names this system. Worth knowing: a 2025 solar pv 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. 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.
• 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 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 2021 panel/service permit is on record for this parcel, which makes it unlikely the original 60–100 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

  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

  Solar was permitted here in 2025. 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.

The most recent permitted work on this parcel was in 2025. 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 homes in 85711 · Homes by ZIP code · Commercial property in 85711 · 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.