# Knob and Tube Replacement in Mid-City Los Angeles, Miracle Mile & Carthay

> Knob and tube replacement in Mid-City Los Angeles and Miracle Mile: duplex and fourplex rewires, eight HPOZs, LADBS permits and LADWP meters. Plan by unit.

URL: https://laknobandtube.com/service-areas/mid-city-miracle-mile/

Mid-City, Miracle Mile & Carthay questions

Last Updated: October 25, 2026

**City of Los Angeles** Jurisdiction

**[LADBS](https://dbs.lacity.gov/)** Permits and inspections

**[LADWP](https://www.ladwp.com/)** Electric utility

**90019, 90036, 90035** House rewire permits: 113 in 90019, 36 in 90036 and 32 in 90035, January 2020 to October 2026

## What starts a rewire in Mid-City, Miracle Mile & Carthay

### An owner-occupied duplex

The owner lives downstairs, a resident lives upstairs, and both units still run on original circuits.

### A fourplex with separate meters

Four units, four meters and a shared house panel, each with its own mix of old and new wiring.

### A meter bank on the front facade

The building sits in an HPOZ, and the new service would be visible from the street.

### Turnover between occupants

One unit is empty for a few weeks, which is the easiest time to open its walls.

## Services in Mid-City, Miracle Mile & Carthay

### Partial replacement

Replace the live circuits that matter now and document exactly where the old system stops.

### Whole-house rewiring

Replace every old branch circuit, knob and tube or not, and add the circuits and protection a modern house needs.

### Panel upgrade

Replace a fuse box or undersized panel with capacity for the new circuits, coordinated with the utility and the rewire.

### Plaster-wall rewiring

Route new circuits through the attic and crawlspace, keep openings small and planned, and agree the patching before work starts.

### Inspection

Find out which circuits are still live, what condition the reachable wiring is in, and what cannot be seen.

In Mid-City, the decision to replace old wiring can belong to a building rather than a house: a pre-war duplex or fourplex where one unit’s kitchen already has new circuits, the next unit is still original, and the owner has residents to plan around. [LA Knob and Tube](https://laknobandtube.com/) handles knob and tube replacement in Mid-City Los Angeles, Miracle Mile, Carthay Circle, Country Club Park, Wilshire Park and Oxford Square, in single-family houses and small apartment buildings alike.

ZIP code 90019 shows both halves of that mix. Its pre-1940 stock includes small two-to-four-unit buildings with 2,784 rented units, the largest of any ZIP code tested, alongside 3,311 owner-occupied single-family houses from the same era, by Census Bureau counts. Altogether, 45.0% of the housing in 90019 predates 1940.

## Small multifamily buildings, unit by unit

Where a pre-war duplex or fourplex has one service entrance, a meter for each unit and branch circuits that run unit by unit, there may also be a house panel for the stair lights, laundry or garage. Over the decades, each unit may have been updated on its own schedule. One kitchen gets new circuits during a remodel, another unit gets a few grounded outlets, and the knob and tube in the rest stays live.

The circuit map handles that by unit. It records which outlets and lights in each unit are still on knob and tube, which old runs have been cut dead, where later cable was spliced onto the old conductors, and which circuits cross from one unit’s panel into another’s space. That can happen where wiring was rerouted over the years, and it matters because a circuit fed from the wrong unit’s meter is both a safety and a billing problem.

With the map, an owner can phase the work. Units can be rewired one at a time, most easily when one is between occupants, with a [partial replacement](https://laknobandtube.com/partial-knob-and-tube-replacement/) on each unit’s remaining circuits or a full [whole-house rewiring](https://laknobandtube.com/whole-house-rewiring/) scope applied unit by unit. Each phase ends with a written list of what remains.

## Owner-occupancy, residents and the permit

Who lives in the building changes the paperwork. LADBS lets an owner pull an owner-builder electrical permit only on a single-family dwelling, and only with proof of ownership and proof that the owner lives there. On a duplex or fourplex, the permit is pulled by the licensed electrical contractor doing the work, which lists its state license, city business tax number and workers’ compensation carrier on the application.

Occupied units need a workable plan. Because circuits are swapped one at a time, a unit keeps power in most rooms on a normal workday, and every wall or ceiling opening appears on the quote with the name of whoever repairs it. Owners handle notice and access with their residents, and the sequence is built around the days the owner arranges. The [guide to living at home during rewiring](https://laknobandtube.com/guide/living-at-home-during-rewiring/) explains what a working day looks like from inside a unit.

## Eight HPOZs and the exterior service

Eight Historic Preservation Overlay Zones fall within this part of the city: Miracle Mile, Miracle Mile North, Carthay Circle, South Carthay, Carthay Square, Wilshire Park, Country Club Park and Oxford Square. City Planning states that interior work with no change to the exterior is exempt from review, and each preservation plan lists its exemptions in section 3.5. Rewiring inside the walls proceeds on an ordinary electrical permit; across the city, 295 single-family rewire permits from January 2020 to October 2026 were on HPOZ-zoned parcels.

The exterior is where review applies. A multifamily building that moves from separate old meters to a new meter bank, or raises its mast, may be changing a street-facing wall. A meter bank on a front wall is hard to hide. Its placement is settled ahead of the permit application, so the overlay’s design guidance and the utility’s meter rules point the same way. Review procedures are laid out in the [historic homes guide](https://laknobandtube.com/guide/rewiring-historic-homes-los-angeles/). Contributing buildings in these overlays can also qualify for a Mills Act contract, under which electrical replacement counts as rehabilitation work.

## LADWP and multi-meter services

All of this area is LADWP territory. A changed meter panel starts with the utility confirming where the meters will go, and on a multi-unit building that confirmation covers the whole bank. LADWP’s inspector will not come out until LADBS has issued the electrical permit, and LADWP estimates a meter set in about ten business days if no other utility work is required. Where the existing service can carry the new demand, LADWP generally has no installation charge; street or transformer work is priced case by case. A new panel, as the [panel upgrade page](https://laknobandtube.com/electrical-panel-upgrade/) points out, does not by itself take out any knob and tube.

## Raised floors in the flatlands

Raised wood floors are common under the pre-war buildings here, and the retrofit records reflect it. Since January 2020, 321 cripple-wall retrofit permits have gone out in 90019 alone, bolting sills and bracing the short walls under the floor, with 751 across the Wilshire community plan area. A crawlspace gives first-floor outlets an easy route from below.

Second-floor units are different. In a two-story duplex, the upstairs unit is reached from the attic, and the floor between units is a closed cavity. Circuits that feed the upper unit’s walls from below sometimes have to pass through the lower unit’s walls or a shared chase, which is why the [plaster wall rewiring](https://laknobandtube.com/plaster-wall-rewiring/) plan for an upper unit can include openings in the unit beneath it.

## Mapping and inspecting a building unit by unit

The first visit maps each unit and the shared service, and measures the attic and crawlspace. LADBS handles the permit, and city records show house rewires almost always go through as express permits, with no plan check. Inspections happen before walls close and at the end, unit by unit if the work is phased. What the inspector looks for is set out in the [guide to LA rewiring permits](https://laknobandtube.com/guide/los-angeles-rewiring-permit/), and the [rewiring quote checklist](https://laknobandtube.com/guide/rewiring-quote-checklist/) lists what a multi-unit quote should separate.

Housing age varies within the area. In 90036, around the Miracle Mile, 35.7% of homes predate 1940; in 90035 only 25.7% do, so a [knob and tube inspection](https://laknobandtube.com/knob-and-tube-inspection/) settles what a given building has.

Nearby, [Hancock Park and Windsor Square](https://laknobandtube.com/service-areas/hancock-park-windsor-square/) have larger single-family houses in HPOZs, [West Adams and Jefferson Park](https://laknobandtube.com/service-areas/west-adams-jefferson-park/) have the city’s densest HPOZ cluster, and [Silver Lake and Echo Park](https://laknobandtube.com/service-areas/silver-lake-echo-park/) also have many small rental buildings.

## Neighborhoods and coverage

- Mid-City
- Miracle Mile
- Carthay Circle
- Country Club Park
- Wilshire Park
- Oxford Square

1. 1. Eagle Rock
2. 2. Glendale
3. 3. Hancock Park & Windsor Square
4. 4. Highland Park & Mount Washington
5. 5. Leimert Park & Hyde Park
6. 6. Mid-City, Miracle Mile & Carthay
7. 7. Pasadena
8. 8. Silver Lake & Echo Park
9. 9. West Adams & Jefferson Park
10. 10. Lincoln Heights & El Sereno
11. 11. Los Feliz & Atwater Village
12. 12. South Pasadena

## Mid-City, Miracle Mile & Carthay questions

### What does knob and tube replacement cost for a duplex in Mid-City?

Rewiring typically runs $10 to $20 per square foot of living area across the LA area, before panel and patching. For a duplex or fourplex, apply that to each unit's floor area, then add the panel and meter work, which depends on how many services the building has and whether they change.

### Can each unit of a Mid-City fourplex be rewired separately?

Yes. Each unit can be mapped and rewired as its own phase, usually when it is vacant or on a schedule the occupant can live with. The building's service and any house panel for common lights are planned once, because they serve every unit.

### Can a duplex owner pull their own electrical permit in Los Angeles?

LADBS allows an owner-builder electrical permit only on a single-family dwelling, with proof of ownership and proof that the owner lives there. A rewire on a duplex or fourplex is permitted through a licensed electrical contractor.

### Do Miracle Mile HPOZ rules cover interior rewiring?

No. City Planning states that interior work with no change to the exterior is exempt from HPOZ review, and each preservation plan lists its exemptions. A new meter bank, mast or service panel on the street side of a building in the Miracle Mile or Miracle Mile North HPOZ can need approval.

### Can residents stay in their unit during a Mid-City rewire?

Often, yes. Circuits are replaced in sequence so most of a unit has power on most days, and openings are made at boxes and where framing must be crossed. Owners handle notice and access with residents; the schedule is built around what the owner arranges.

## Related guides

- Learn [How do you rewire a historic home in Los Angeles without losing what makes it historic?](https://laknobandtube.com/guide/rewiring-historic-homes-los-angeles/)Interior rewiring is usually outside preservation review in an HPOZ. The exterior, the finishes and the paperwork are where the care goes.
- Learn [How long does rewiring take, and can you live at home while it happens?](https://laknobandtube.com/guide/living-at-home-during-rewiring/)The schedule depends on circuits, access and inspections. Here is what decides it, and what an occupied house should plan for.
- Learn [Do you need an electrical permit for rewiring in Los Angeles, and how does it work?](https://laknobandtube.com/guide/los-angeles-rewiring-permit/)Who issues it, who is allowed to pull it, what the inspector checks, and how Pasadena, Glendale and South Pasadena differ from LADBS.
- Decision Guide [What should a rewiring quote include, and how do you compare two of them?](https://laknobandtube.com/guide/rewiring-quote-checklist/)Two quotes for the same house can be thousands apart because they describe different jobs. This list shows what to look for and how to line them up.

## Nearby service areas

- [Hancock Park & Windsor Square](https://laknobandtube.com/service-areas/hancock-park-windsor-square/)LADBS permits, LADWP service
- [West Adams & Jefferson Park](https://laknobandtube.com/service-areas/west-adams-jefferson-park/)LADBS permits, LADWP service
- [Silver Lake & Echo Park](https://laknobandtube.com/service-areas/silver-lake-echo-park/)LADBS permits, LADWP service