# Knob and Tube Replacement in West Adams, Jefferson Park and Harvard Heights

> Knob and tube replacement in West Adams, Jefferson Park and Harvard Heights: seven HPOZ plans, two-story Craftsman routing and LADBS permits. Plan your visit.

URL: https://laknobandtube.com/service-areas/west-adams-jefferson-park/

West Adams & Jefferson Park questions

Last Updated: October 24, 2026

**City of Los Angeles** Jurisdiction

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

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

**90018, 90016, 90007** House rewire permits: 85 in 90018, 112 in 90016 and 36 in 90007, January 2020 to October 2026

## What starts a rewire in West Adams & Jefferson Park

### Two floors of original plaster

The second-floor bedrooms still run on knob and tube, and the stairwell and ceilings are finished plaster.

### An insurance questionnaire

The renewal asks what kind of wiring the house has, and the honest answer is that nobody knows.

### A new service in an overlay zone

The panel needs to move, and the house sits in one of the neighborhood's preservation overlay zones.

### Built in the 1940s

The listing says the house is too new for knob and tube, and the attic has not been looked at yet.

## Services in West Adams & Jefferson Park

### Whole-house rewiring

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

### 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.

### Panel upgrade

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

### Partial replacement

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

[LA Knob and Tube](https://laknobandtube.com/) replaces knob and tube wiring across West Adams, Jefferson Park, Harvard Heights, Adams-Normandie and University Park, where the city’s densest cluster of historic overlay zones sits on some of its oldest houses. Knob and tube replacement in West Adams usually means two finished floors, plaster on both, and a preservation plan to check before anything changes outside. In ZIP code 90018, the Census Bureau estimates 47.1% of housing units were built before 1940 and 58.1% before 1950.

## Seven overlay zones, seven plans

City Planning lists seven completed Historic Preservation Overlay Zones in this cluster: Jefferson Park, West Adams Terrace, Harvard Heights, Adams-Normandie, La Fayette Square, University Park and Western Heights, with Pico-Union next door. No other part of Los Angeles packs that many into one area.

Each zone has its own preservation plan, and each plan lists its exemptions in its own section. City Planning materials state that interior work with no exterior change is exempt from review, so replacing wiring inside walls and ceilings normally needs no HPOZ approval. The exterior is another matter. A relocated service mast, a new meter or a panel moved to an outside wall is an exterior change, and most exterior changes in an HPOZ need a Planning approval before work starts. Because the plans are written zone by zone, the question to answer first is which plan covers the parcel, and then what that plan says about mechanical and electrical equipment.

Citywide, LADBS records show 295 of the 3,886 single-family rewire permits issued from January 2020 to October 2026 were on parcels zoned with an HPOZ suffix. A rewire inside an overlay zone is ordinary work; it simply has one more document to read. The [historic homes guide](https://laknobandtube.com/guide/rewiring-historic-homes-los-angeles/) covers approvals and the Mills Act.

## Two-story Craftsman houses from the 1900s

City Planning describes Harvard Heights as predominantly two-story Craftsman residences built between 1902 and 1908, and much of the surrounding area dates from the same early decades. Where a house has two full floors, the rewire becomes a routing problem with three layers: the attic, the floor between the stories, and the crawlspace.

The attic is the easy path to the second floor. Upstairs ceiling fixtures and many upstairs outlets can be fed straight down from above. The crawlspace does the same for first-floor outlets. The hard layer is in the middle. The first-floor ceiling is closed above by the second-floor floor and below by finished plaster, so a new light or switch loop there has no open side to work from. Routes are found through closets, stacked walls that run from crawlspace to attic, and occasionally a chase hidden in a cabinet or pantry. Where none of those reach, a short opening in the ceiling plaster is made where framing has to be crossed, and it is listed on the quote along with who patches it.

The [plaster wall rewiring page](https://laknobandtube.com/plaster-wall-rewiring/) explains how openings are placed in plaster and lath, and the [whole-house rewiring page](https://laknobandtube.com/whole-house-rewiring/) covers sequencing when every floor is involved.

## How old the stock is, ZIP by ZIP

The three ZIP codes in this cluster differ more than the neighborhood names suggest.

| ZIP | Built before 1940 | Built before 1950 | Owner-occupied single-family, pre-1940 | LADBS single-family rewires, Jan 2020 to Oct 2026 | Cripple-wall retrofit permits, same window |
| --- | --- | --- | --- | --- | --- |
| 90018 | 47.1% | 58.1% | 3,270 | 85 | 221 |
| 90016 | 32.2% | 51.2% | 2,675 | 112 | 328 |
| 90007 | 35.0% | 41.6% | 766 | 36 | n/a |

Housing figures are Census Bureau estimates; permit figures are LADBS records. 90007 covers the area around USC, where far fewer old houses are owner-occupied, so a rewire there is more often a landlord’s decision. 90016 has more rewire permits than 90018 despite a lower pre-1940 share, and more retrofit permits too, which fits its large share of houses from the 1940s and the raised floors those retrofit permits imply. Across the wider West Adams-Baldwin Hills-Leimert plan area, LADBS issued 1,369 cripple-wall retrofit permits in the same window, second only to Northeast Los Angeles.

## The 1940s question

More than half of 90018 and 90016 was built before 1950, which puts a lot of houses in the decade when residential wiring practice was changing. Year built is a starting point, not an answer: it is reported by owners and survey respondents, older dates are the least reliable, and a 1940s house can contain more than one wiring method. The [identification guide](https://laknobandtube.com/guide/how-to-identify-knob-and-tube/) explains what to look for from a safe distance, such as porcelain knobs on attic framing or separate single wires on tubes through joists, and why visible modern cable at a few outlets does not prove the original wiring is gone.

## Insurance pressure in 90018

California FAIR Plan residential policies in 90018 reached 1,086 in September 2025, up from 977 four years earlier. That figure says many owners here are buying insurance outside the regular market; it does not say why, and nothing ties it to wiring specifically. Still, when a carrier’s questionnaire asks about wiring type, the answer has to be accurate. A rewire with a final LADBS inspection and a labeled panel gives an owner something concrete to show, and a partial job ends with a written list of what remains. Carriers set their own rules, so no particular result is assured. The [insurance guide](https://laknobandtube.com/guide/knob-and-tube-insurance-california/) covers what underwriters may ask.

## Running a rewire in a West Adams house

The first visit maps each circuit as live, dead or mixed, checks the panel, and measures attic and crawlspace access on both floors. A 2021 LADBS permit in 90018 simply reads “Update knob-and-tube electrical system to new wiring.” Only 96 LADBS electrical permits since 1996 name knob and tube outright, and 7 of them are in 90018, tied for the fourth most of any ZIP code; most rewire permits never say what they replaced. Behind a one-line description is a circuit-by-circuit plan that keeps most of the house powered most days. LADBS issues nearly all house rewire permits as express permits, with inspections before walls close and at the end. LADWP serves the area; a service change starts with LADWP verifying the meter location. The [replacement process guide](https://laknobandtube.com/guide/knob-and-tube-replacement-process/) walks through each stage, and an [inspection](https://laknobandtube.com/knob-and-tube-inspection/) is the place to start when the extent is unknown.

Next door, [Mid-City and Miracle Mile](https://laknobandtube.com/service-areas/mid-city-miracle-mile/) adds more overlay zones and duplexes, [Leimert Park and Hyde Park](https://laknobandtube.com/service-areas/leimert-park-hyde-park/) shares the same plan area without an HPOZ layer, and [Hancock Park and Windsor Square](https://laknobandtube.com/service-areas/hancock-park-windsor-square/) has larger houses under its own preservation plans.

## Neighborhoods and coverage

- West Adams
- Jefferson Park
- Harvard Heights
- Adams-Normandie
- University Park
- Arlington Heights

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

## West Adams & Jefferson Park questions

### Which HPOZ preservation plan applies to a rewire in West Adams?

The plan for the overlay zone the parcel sits in: Jefferson Park, West Adams Terrace, Harvard Heights, Adams-Normandie, La Fayette Square, University Park or Western Heights each has its own. Exemptions, including interior work, are listed in each plan, and exterior service changes are checked against it.

### What does rewiring a two-story house in West Adams cost?

Whole-house rewiring typically runs $10 to $20 per square foot of living area, a typical LA-area range, before panel work and patching. In a two-story house, the routes to the second floor and how much finished plaster has to be opened decide where the job lands in that range.

### Can second-floor circuits in a Harvard Heights Craftsman be replaced from the attic?

Often, yes. Upstairs ceiling lights and many outlets can be fed down from the attic. The harder part is the first-floor ceiling, which sits between two finished floors; those runs usually come up from the crawlspace or through closets and stacked walls.

### Could a 1940s house in Jefferson Park still have knob and tube?

It can't be ruled out from the year built alone. In 90018, 47.1% of housing units date from before 1940 and 58.1% from before 1950, so many houses come from the decade when wiring methods changed. Only looking at the wiring settles it.

### Will a rewire help with an insurance renewal in 90018?

It can help, but no outcome is guaranteed; carriers set their own rules. What a rewire gives you is documentation: a permit with final inspection, a labeled panel and, after a partial job, a written list of any circuits that remain on original wiring.

## 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 does knob and tube affect home insurance in California?](https://laknobandtube.com/guide/knob-and-tube-insurance-california/)What carriers tend to ask, how to get their answer in writing, what an electrician's letter can and cannot say, and where the FAIR Plan fits.
- Learn [How do you identify knob and tube wiring?](https://laknobandtube.com/guide/how-to-identify-knob-and-tube/)A look-only guide to the clues in attics, crawlspaces, fuse boxes and rooms, and why what you can see is never the whole answer.
- Learn [How does knob and tube replacement work, from the first visit to the final inspection?](https://laknobandtube.com/guide/knob-and-tube-replacement-process/)Each stage depends on the one before it. Here is what has to be known before the next step starts, and where the path splits by house.

## Nearby service areas

- [Mid-City, Miracle Mile & Carthay](https://laknobandtube.com/service-areas/mid-city-miracle-mile/)LADBS permits, LADWP service
- [Leimert Park & Hyde Park](https://laknobandtube.com/service-areas/leimert-park-hyde-park/)LADBS permits, LADWP service
- [Hancock Park & Windsor Square](https://laknobandtube.com/service-areas/hancock-park-windsor-square/)LADBS permits, LADWP service