A pre-1940 Victorian, Tudor, or Colonial Revival in Montclair, Short Hills, Summit, or Chatham raises a question that newer construction never does: how far does the historic preservation commission's authority actually reach, and does it touch the lighting control plan inside the house?
Ask the commission where its authority stops
Before locking a retrofit plan, confirm with your specific town's commission what it reviews and what it does not. Many historic district commissions are built around exterior review — facades, visible fixtures, street-facing alterations — rather than interior work. If that's how your town's ordinance is written, the keypad layout, the dimming curve in the dining room, and the color temperature of the kitchen downlights would be decisions for the homeowner rather than the commission, while a street-facing sconce or lantern swap would still need to go through the exterior review process. Don't assume this boundary from a neighboring town's rules; ask your own commission (or your architect, who deals with it regularly) exactly which fixtures and walls are in scope before you finalize either the interior retrofit or an exterior fixture change.
Retrofitting wireless lighting control without opening plaster
A 1910 house with plaster-and-lath walls isn't a candidate for pulling new low-voltage cable to every switch location. Lutron's RadioRA 3 platform was built around this problem. According to Lutron RadioRA 3 Lighting and Palladiom Shading System Review, RadioRA 3's wireless keypads and dimmers (Sunnata RF) use a mesh protocol called Clear Connect Type X, with placement rules rather than a hardwired topology: devices should sit within 75 feet of the processor, at least two Type X devices within 25 feet of the processor, and each device within 25 feet of two other Sunnata RF devices. In a standard-sized room this is rarely a constraint, but it becomes a real design question in a large or oddly-shaped historic floor plan where you might want a keypad tucked in a hallway or closet, since coverage has to be checked device-to-device rather than assumed.
One wiring rule from that same source matters for a historic rewire: RadioRA 3 dimmers, keypads, and switches require a neutral conductor, and in 3-way or 4-way circuits the main dimmer has to sit at the end of the wiring chain, right before the load, with companion devices earlier in the chain. In a house with decades of informal rewiring, this ordering has to be verified wire by wire rather than assumed from the existing switch legs. That's a question worth raising with your electrical contractor before any device goes back into an existing box.
For houses that have already standardized on Lutron HomeWorks, a related platform question is whether to run devices over the legacy QS wired bus or move to HomeWorks QSX. Lutron Launches HomeWorks QSX in Europe describes QSX as compatible with all existing HomeWorks wired QS and wireless RF devices, which means a historic house with some existing QS wiring in accessible runs does not necessarily require a full rip-and-replace to adopt current HomeWorks capability.
Tunable lamps in existing fixtures
A separate question from control is the light source itself. Lutron Announces Expanded Lighting Portfolio describes the Ketra S30 lamp, built with a new round trim designed to work with a new-construction recessed housing, positioned as a lower-priced, premium Ketra downlight meant to expand Ketra into more spaces in a home. The same source describes the Ketra Ready program: a curated group of decorative-fixture manufacturers whose products are built to work with Ketra lamps, giving integrators decorative choices meant to deliver an immersive lighting experience without forcing a generic downlight can into every location. For a period sconce or pendant already in place, ask your lighting designer whether the specific fixture body can accept a Ketra lamp assembly, or whether the retrofit calls for a Ketra Ready-compatible fixture of the same style instead.
Where wire still has to run
None of this eliminates wiring entirely. Wireless keypads solve the switch-location problem, but a dimmer or lamp module still needs line power, and a HomeWorks QSX installation still needs a path back to the processor for wired devices. In a pre-1940 house, ask your integrator and electrician to walk the attic and basement joist bays as a routing option before assuming any run requires opening finished plaster. Questions worth resolving early: which existing switch boxes already have a neutral conductor present (RadioRA 3 requires one at dimmers, keypads, and switches), which runs can reach an attic or basement without fishing through a finished ceiling, and where a RadioRA 3 processor or HomeWorks QSX panel will physically sit relative to the rooms it serves, given the Type X placement distances above.
Sequencing the retrofit around the commission calendar
If your town's review is limited to the exterior, as described above, a practical sequence is to settle the interior control platform and keypad layout first, since that decision would not need commission sign-off, and treat any visible sconce, lantern, or landscape fixture as its own submission with its own drawings. Confirming that split with your commission early keeps the interior retrofit moving on its own schedule rather than waiting on a board calendar.
Cave Group designs and services Lutron RadioRA 3 and HomeWorks QSX lighting control, along with Ketra tunable light, for houses across Essex, Union, Morris, and Somerset counties, and works from the drawings with the homeowner's electrician to resolve wiring order and routing before devices go in. More on how this fits a North Jersey house is on the North Jersey service page. A related piece on choosing between wired and wireless platforms for an older building is Retrofitting a Tudor or Colonial: RadioRA 3 vs QSX.