LA Knob and Tube rewires historic houses in Los Angeles, Pasadena, Glendale and South Pasadena, and for owners of designated LA properties, Mills Act electrical system work is a recurring question. The short version: City Planning lists electrical system replacement among the kinds of work that go beyond routine maintenance, which is what the program is meant to support. The program has run on a yearly application cycle, and it is currently paused for new applications while the city revises it.
What the Mills Act is in Los Angeles
The Mills Act Historical Property Contract Program is a revolving 10-year contract between the City of Los Angeles and the owner of a qualified historic property. In exchange for rehabilitating and maintaining the property, the owner may receive a property tax reduction, because a Mills Act property is assessed by an income approach rather than its market value. Contracts renew automatically each year, so the term always runs 10 years ahead, and they pass to new owners when the property is sold.
Qualified properties are Historic-Cultural Monuments and contributing properties in one of the city’s Historic Preservation Overlay Zones, such as those in Hancock Park and Windsor Square or West Adams and Jefferson Park. The program sets property valuation limits by building type, and a property above its limit needs an exemption and a Historic Structure Report. The historic homes guide covers which HPOZs exist and how interior rewiring is treated in them.
How the application cycle has worked
The program has been run as a yearly cycle rather than open enrollment. In past cycles, City Planning’s Office of Historic Resources opened applications with a workshop early in the year, followed by a first-part application and fee due within a few weeks. Eligible applicants then submitted the contract packet in spring, the property got a pre-approval inspection over the summer, owners reviewed the inspection findings in the fall, and contracts were recorded near the end of the year.
The window to apply has been short each year, so an owner who wanted in had to have a plan ready before the cycle opened.
Where the program stands
City Planning’s Mills Act page currently says new applications are temporarily on hold. The department paused intake to conduct a comprehensive assessment aimed at long-term funding, staffing and a more equitable spread of the program’s benefits, and it is preparing amendments to the city’s Mills Act ordinance for the City Council. A 2022 assessment report was followed by draft policy updates presented to the Cultural Heritage Commission and in an online workshop in April 2025. City Planning has also said it is updating the program’s fee structure as part of a wider fee study.
When intake restarts, the timing and the rules may differ from past cycles. City Planning’s Mills Act page and its email updates are the place to watch; describing the next window here would only be a guess.
Where electrical work fits the application
City Planning evaluates applications on priority criteria. One of them asks whether the scope includes tasks above and beyond routine maintenance, and it gives three examples: seismic retrofit, electrical system replacement, and window or roof rehabilitation. The application also asks whether a substantial scope of rehabilitation is necessary and why, and whether the work preserves the property’s character-defining features. Properties that need only routine maintenance may not get priority.
That puts a full knob and tube replacement squarely in the kind of work the program describes. A whole-house rewire of an original system is a systems upgrade, not maintenance. A partial job, a new panel alone or replacing a few devices is harder to describe that way.
The 10-year rehabilitation plan
A Mills Act contract includes a Rehabilitation, Restoration and Maintenance Plan. In City Planning’s workshop materials, each task on the plan is marked as rehabilitation or restoration, or as recurring maintenance, and as completed or proposed, with a short description and an estimated cost. Work is expected to follow the Secretary of the Interior’s Standards, and the city inspects contract properties periodically, roughly every five years in the program’s past materials, to check progress on the plan.
For electrical work, that suggests a few practical steps:
- Describe the scope plainly. A knob and tube inspection gives the circuit map to describe it from. For example: replace the original knob and tube branch circuits throughout, upgrade the service, and restore plaster at access openings.
- Use a real number. The estimated cost should come from a quote, not a guess. The Los Angeles cost guide explains the ranges and why plaster restoration is priced separately.
- Show how features are protected. Routing through the attic and crawlspace first, openings at boxes and in plain wall, and trim removed and reinstalled rather than cut, as on the plaster wall rewiring page.
- Keep the exterior in mind. A new mast or meter on a street-facing facade is an exterior change in an HPOZ; placing service equipment at the rear where possible avoids that question; the panel upgrade vs rewiring guide covers the utility side.
- Pair it with related work. A seismic retrofit is named in the same criterion, and both jobs use the crawlspace.
Recently completed work
The criteria also ask whether recently completed work by the current owner is consistent with the Secretary’s Standards and the property’s historic character, and the plan has a place for completed tasks. An owner who rewires before applying can still show that work. Keep the electrical permit and its final inspection, the quote or invoice describing the scope, and photos of openings before and after patching. The Los Angeles rewiring permit guide explains where the permit record comes from.
Pasadena, Glendale and South Pasadena
The program described here is the City of Los Angeles program. Pasadena, Glendale and South Pasadena are separate cities with their own historic preservation programs, and whether and how a Mills Act contract is available there, and on what schedule, is confirmed with each city.
No one can promise a property will be accepted into the program or what tax savings it will see. What can be done in advance is a clear, costed electrical scope that fits the plan. When you want one for a historic house, call or request an estimate.