Electrical permit history — 143 W Michigan Dr

143 W Michigan Dr, Tucson — built 1947, with 18 permits on record. Review electrical, HVAC and remodel history with links to official records.

Electrical Property Screening Report · Property

143 W Michigan Dr

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 1947 — pre-1950 knob-and-tube era · last permitted panel/service work 2025 (permitted, completion not confirmed)

Permanent link: Electrical permit history for 143 W Michigan Dr (aztucsonelectricalsolutions.com/property/12008025f/143-w-michigan-dr-tucson-az-85714) · Public records last checked 2026-08-22

Is it time to upgrade?

  • Electrical service & panelPermitted — completion not confirmedA 2025 permit specifies this work (the permit description states “Upgrade electrical for Unit 7 and 8 to (2) 200 amp meter/load centers with individual risers per latest NEC and TEP requirements, relocated to north wall of Unit 7.”), but the available record does not show a final inspection. The work was permitted, but final completion is not confirmed. Official status: Inspections. TC-RES-0825-03785 — Upgrade electrical for Unit 7 and 8 to (2) 200 amp meter/load centers with individual risers per latest NEC and TEP requirements, relocated to north wall of Unit 7.
  • Heating & coolingNot in this windowNothing in the permit records we read for this parcel that names this system. Worth knowing: a 2007 trade permit permit is on file — 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. The assessor records the roof as Composition Shingle.
  • 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 — 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

    There is an electrical reconnect permit from 2024. The service was disconnected at some point and brought back — usually after a vacancy, a utility disconnect, or work that required the power off. Worth knowing what prompted it.

  • Routine

    A trade permit was pulled in 2020. Trade permits cover electrical, plumbing, and mechanical work individually, so some permitted trade work has been done here since.

What to check at the panel

Everything above is read off public records. These are the things only someone standing at the panel can settle, and they take about a minute.

  1. The number stamped on the main breaker handle — 100, 125, 150, 175 or 200. That is the service rating, and no record on this page confirms it.
  2. The busbar rating printed on the panel label. It is a different number from the main breaker, and it is the one that decides how much solar a panel can take under the 120% rule.
  3. The manufacturer and catalog number on the label inside the door.
  4. How many full-size spaces are left, how many positions the label permits a tandem breaker in, and the tandem limit the label states. A full panel is a different job from a full service.
  5. The conductor material at the main lugs, and whether the terminations look clean and tight.
  6. Whether there is a separate meter-main outside as well as the panel indoors — that changes where a disconnect and any new feeder would land.
  7. Whether the water heater, dryer and range are gas or electric. No public record carries fuel type, and it is the single biggest variable in a load calculation — it can move the calculated load on the same house by more than 40 A.
  8. Whether any knob-and-tube is still live where it is visible — in the attic, the basement or a crawlspace — and whether insulation has been laid over it.
  9. Whether receptacles are two-prong, and whether any three-prong replacements have an actual ground behind them. A $10 tester answers this at every outlet.
  10. Whether the kitchen counter, bathroom, garage and exterior receptacles have GFCI protection, and whether the test button actually trips them.

With those in hand you can run the numbers yourself. The load calculator does the NEC 220.82 optional-method calculation — the same method a permit application uses — and shows its work. It offers to start from the 1,996 sq ft on the assessor record; every other value is yours to enter.

Open the load calculator →

What these jobs cost here

Estimated ranges for this property, from its age, its size and the Tucson permit fee and code.

Electrical panel or service upgrade

$3,800

Most jobs like this land between $3,400 and $4,700.

The bottom of this range is a clean, simple job: single storey, framed wall, the panel staying where it is, a short service run, and nothing unexpected once the cover comes off. That job is real and we do book it — but it is the best case, not the average, and the figure above it is what most houses actually come to.

Priced from built 1947 (pre-1950 knob-and-tube era), City of Tucson permit fee and the 2023 NEC it has adopted, Tucson Electric Power as the serving utility and framed walls on the assessor record, so no masonry drilling or stucco patch is priced.

What would move this price
  • Only if the panel has to move — a clothes closet, a bathroom, over a stairway, or behind a door +$3,900
  • Only if the mast is undersized or corroded — common at this age +$1,300
  • Only if the metal water and gas piping are not already bonded — usually not, at this age +$600
  • Only if the original fuse or split-bus panel is still in service +$1,700

If every one of those turned out to apply, this becomes about $12,100. That is the worst realistic case, not a prediction — none of them is a claim about your house.

Before you spend anything
  • A service upgrade fixes capacity and the safety of the service equipment. It does not fix branch wiring. If the reason you are here is flickering lights, warm outlets or cloth-jacketed wiring, an upgrade is a down payment on a much bigger problem, and it is worth knowing that before you spend in the wrong order. (The report reserves the era-specific wiring checks for the years they actually apply to — read those above.)
  • You may not need the upgrade at all. NEC 220.87 lets an existing dwelling be sized from twelve months of actual metered demand rather than a calculated load, and real houses draw far less than the calculation predicts. Ask your utility for a year of interval data and have it run that way first. Two cautions so this does not backfire: the demand tile in a TEP online account shows on-peak demand only, which is not the annual maximum the code asks for — you want the formal usage-data release — and 220.87 proves CAPACITY and nothing else. It does not create empty breaker spaces, and it does not make an obsolete panel, or one whose breakers have a documented failure history, safe. Those are separate questions with separate answers — and where the era makes a brand worth checking, the report above says so on its own.

Air conditioning or heat pump replacement

$15,400

Most jobs like this land between $12,300 and $19,400.

Priced from 1,996 sq ft → about 4 ton as a starting point (a Manual J is the real answer), no cooling type on the assessor record, City of Tucson permit fee, one storey on the assessor record, so an ordinary roof set is priced and a composition shingle roof on the assessor record, so no foam re-coating is priced.

What would move this price
  • Only if the duct has to be replaced — no record carries its condition, and on an attic system at this age it is a real possibility +$9,200
  • Only if it is a foam or built-up roof that has to be re-coated at the patch +$900

If every one of those turned out to apply, this becomes about $29,500. That is the worst realistic case, not a prediction — none of them is a claim about your house.

  • Most Tucson houses carry a packaged unit on the roof, and how easy that roof is to reach is worth more than a thousand dollars of difference on the same equipment.
Before you spend anything
  • If you are told a heat pump means you need a 200 A service, ask which load. It is almost never the compressor — a 5-ton outdoor unit is about a 31 A circuit. It is the electric BACKUP HEAT STRIP, which on a large kit can be a 109 A circuit on its own. In Tucson's mild heating season the strip kit can often be sized far smaller, or left out, and the service question disappears with it.
  • Equipment here lasts ten to fourteen years, not the fifteen to twenty you will read nationally — a rooftop package unit at the short end. Replace rather than repair if the unit is twelve or more and the repair is over $1,500, if the compressor has failed and it is eight or more, or if the repair is over 40% of a new system.
  • The size you will be quoted is probably bigger than the size you need. The square-foot rule every contractor uses runs roughly two to three times oversized against real load calculations — reviews of hot-climate homes commonly land nearer 1,200 sq ft per ton than the 400 to 600 the rule assumes. A correctly sized unit costs less to buy, and in a dry climate an oversized one short-cycles and leaves the house clammy in the monsoon. Ask for the Manual J before you accept the tonnage.
What the record cannot tell us
  • Whether the service is already 200 A. Nothing in the public record says so, and the number is stamped on the main breaker handle.
  • Whether the panel can stay where it is. A panel in a closet, over stairs or behind a door has to move, and that alone adds $1,500 to $5,000.
  • Whether the service comes in overhead or underground. This is priced as overhead; an underground service with an adequate lateral is a few hundred dollars cheaper, and one with an undersized lateral is thousands more.
  • The assessor record carries no cooling type for this parcel, so this is priced as an ordinary change-out. If the house is on an evaporative cooler, the job is a conversion and costs substantially more.
  • The duct. No record carries its condition, and on a Tucson house with duct in an unconditioned attic it is often worth more than a bigger machine.
  • Whether that floor area is all conditioned space. An assessor figure can include a garage, an enclosed porch or an addition that was never cooled, and every square foot of that oversizes the equipment this page priced.

This is an estimate, not a quote. It is built from this property’s public record and current City of Tucson market rates — nobody has seen your panel, your duct or your roof. A real price comes from a site visit, and the things that move it most are the ones listed above that no record carries.

Price it for your house →

Change the assumptions — the panel’s location, the duct, the tonnage, whether the service is overhead or underground — and watch the number move. That is the point of it.

See the property

Satellite imagery © Google. Imagery can predate recent work and shows nothing about what is inside — context, not evidence.

Google Earth (3D, historical imagery) ↗

Flood and drainage

The federal flood map and the local one are not the same map, and they do not always agree. FEMA’s is the insurance map; the City of Tucson regulates against its own, and that is the one a permit here is judged against.

The record behind this read

Parcel
12008025F
Year constructed
1947 (assessor record)
Permitting authority
Tucson
Zoning
R-2
Living area
1,996 sq ft
Heating
Wall Furnace
Estimated electrical service era
approximately 30–60 A (estimated from the year built, 1947 — not a measurement; verify on site)
Service on record
A 2025 permit was issued; completion is not confirmed in the available record; the permit description states “Upgrade electrical for Unit 7 and 8 to (2) 200 amp meter/load centers with individual risers per latest NEC and TEP requirements, relocated to north wall of Unit 7.” — an increase in capacity as described, not a confirmed installed rating.

The living area and heating above come from the Pima County Assessor’s record, as we read it on 28 Jan 2026. Each other row names its own source.

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.

What this means for work here

Informational public-record summary — not engineering, inspection, valuation or purchasing advice, and not the official record.

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.

What that reading rests on. The issuing offices hold 18 building permits for this parcel dated between 2003 and 2025. By category the work is trade permit (17) and electrical reconnect. 5 of them carry a final inspection; the other 13 were issued, expired or are still open, which is not the same as work completed. There is 1 code-enforcement case recorded against the parcel, all of them closed. We do not reproduce complaint text — it routinely names people with no connection to the property.

Go straight to the records

Each link opens the issuing office’s own file for that record — dates, scope, status and inspections are theirs to publish, and they are all on the other side of these links.

Residential building (7): 2025 TC-RES-0825-04065 · 2025 TC-RES-0825-04064 · 2025 TC-RES-0825-03785 · 2025 TC-RES-0825-03786 · 2025 TC-RES-0725-03518 · 2025 TC-RES-0725-03513 · 2025 TC-RES-0525-02679

City permit record (11): 2024 SP-NRP-1024-00097 · 2020 T20CM08443 · 2020 T20CM02397 · 2020 T20CM01407 · 2015 T15CM08932 · 2015 T15CM01584 · 2007 T06CM06443 · 2004 T04PL01724 · 2003 T03PL01333 · 2003 T03PL01085 · 2003 T03PL01086

Code enforcement cases (1): 2012 T12DV04848

Read the records yourself. We republish selected facts and record numbers so you can find the file; the issuing agency’s record controls. The files are held by City of Tucson permit record (PRO) ↗ — search the parcel number 12008025F. Permit and parcel information courtesy of the City of Tucson and Pima County; their files are the official record and control over anything summarized here.

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 property under construction · Commercial property in 85714 · Commercial & industrial reports · Homes in 85714 · Permit data by neighborhood

Where to go from here

Planning work at this home?

Arizona Electrical Solutions provides electrical, HVAC, underground, design-build, tenant-improvement and general-contracting services in Tucson (four Arizona ROC licenses). Choose what describes you and send us this property’s address and public-record report for review — the address, parcel, report link and permit record travel with the request automatically.

What describes you?
Call (520) 308-6235

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.

How this property compares nearby

Properties on W MICHIGAN DR hold 167 City permits on record, 50 of them since 2022.

Computed from the same public records as this report — counts and years, not an appraisal.

prints this report — permits, comparisons and sources — as a clean document

How this report was built

This is a reading of public records for parcel 12008025F — 18 City permits on file from 2003 to 2025 and 1 code enforcement case — assembled from the Pima County parcel file and the City of Tucson’s published permit layers together with the City’s own migrated permit archive, whose records reach back to the mid-1990s. Some records were still not read for this snapshot: City permit records before the mid-1990s were never fully digitized. The construction year, living area, heating, roof, walls on this page come from our saved copy of the Assessor’s own published data file (dated 2026-01-28). The sewer connection file and the flood map were not read for this snapshot. Absence of a permit here is NOT evidence work was never permitted — it may predate the digitized record or sit in a system this snapshot did not read. Public records snapshot taken 2026-08-22.

The verdicts are inferences from what was permitted and when, and from the era the building went up; they are not an inspection, and nothing here confirms what is installed. Written and maintained by Arizona Electrical Solutions, LLC, a licensed Tucson contractor (ROC 276948 CR-11 electrical, ROC 326401 CR-39 HVAC, ROC 329360 KB-1, ROC 312437 KA).

Look up a different address: Tucson permit history & electrical upgrade check · see permit data by neighborhood.