Can you add lighting control to an existing home?

The most common question we hear about lighting control is whether it can be installed in an existing home, or whether you need a new build or a full rewire. The answer is straightforward: yes, you can add professional lighting control to an existing home without rewiring.

Both Lutron RadioRA 3 and Rako wireless are designed specifically for retrofit installation. They use wireless communication between devices, running on dedicated RF frequencies that are completely independent of your home Wi-Fi. No walls need to be opened, no new cables need to be pulled, and the work can usually be completed room by room with minimal disruption.

How wireless retrofit works

The existing mains wiring to your light switches stays in place. What changes is what sits behind the switch or in the ceiling void.

With Lutron RadioRA 3, Sunnata dimmers and switches replace your existing switches in the back box. They communicate wirelessly via Lutron’s Clear Connect protocol to a small processor that connects to your home network for app control and programming. Pico wireless remotes can be placed anywhere as secondary controls, and they are battery powered so they need no wiring at all.

With Rako wireless, there are two main options. Wireless in line dimmers (such as the RMT 500) mount in the ceiling void directly before the light fitting, so nothing changes visibly in the room. Wireless wallbox dimmers (such as the RCM 070) replace existing dimmers in the back box, similar to the Lutron approach. Wireless keypads are lithium battery powered and can be placed on any wall without wiring.

In both cases, a processor (Lutron) or hub (Rako) connects to your home network to enable app control, voice assistant integration, and scheduling. This is typically a small unit that sits near your router or in a utility cupboard.

The key point is that neither system depends on your Wi-Fi for the lighting control itself. The wireless communication between dimmers, keypads, and the processor runs on its own dedicated frequency. If your internet goes down, every light in the house still works perfectly from the wall controls.

What can be controlled

Almost everything that has a light circuit can be brought into the system.

Dimmable LED downlights and fittings are the most common starting point. Both systems support trailing edge dimming for smooth, silent LED control.

Pendant lights and wall lights on their own circuits can be dimmed independently, so you can balance ambient and task lighting across a room.

Under cabinet and cove tape light can be added using Lutron’s Lumaris range (which is native to RadioRA 3 and offers tunable white from 1,800K to 4,000K) or via Rako’s constant voltage LED dimmers with third party tape.

Table and floor lamps can be controlled via plug in lamp dimmers or inline modules.

Motorised blinds and curtains integrate directly. Lutron offers Triathlon Select battery powered shades that pair natively with RadioRA 3. Rako uses RACUB modules to control third party blind and curtain motors. Either way, blinds can be included in lighting scenes, so a “movie” scene dims the lights and closes the blinds simultaneously.

Outdoor lighting can be included using weatherproof rated modules, bringing garden and pathway lighting into the same scene control as the rest of the house.

Room by room or whole home

One of the biggest advantages of wireless retrofit is flexibility. You do not have to commit to a whole home system on day one.

Start with one room. The kitchen is the most popular starting point because it has the most lighting circuits and the biggest impact on daily life. A single keypad with four scenes (cooking, dining, evening, off) transforms how you use the space. Install the processor or hub at the same time, and you have app control and the foundation for expansion.

Add rooms over time. Once the processor or hub is in place, adding another room means fitting a few wireless dimmers and a keypad. The new room joins the existing system immediately. Scenes can span rooms, so you can add a “goodnight” button in the master bedroom that turns off everything downstairs.

Whole home retrofit in one go. If you prefer to do everything at once, a full home retrofit with wireless devices typically takes two to four days depending on the number of rooms. There is no plastering, no redecorating, and no disruption beyond the time spent fitting devices.

Mix wired and wireless. This is where Rako has a particular strength. In a renovation where some rooms are being taken back to brick (for example a kitchen extension) and others are left untouched, you can install Rako’s wired RAK8 dimmer racks in the new spaces and wireless retrofit devices in the existing rooms. Everything sits on the same system, programmed together, with the same keypads and app.

What about older homes?

The Kingston, Richmond, and Surrey area has a wide range of housing stock. Wireless lighting control works in all of it.

Victorian and Edwardian terraces are ideal candidates for wireless retrofit. The original wiring, lath and plaster walls, and decorative cornicing make rewiring disruptive and expensive. Wireless dimmers that mount in the ceiling void or swap into the existing back box avoid all of that.

1930s semis often have adequate wiring for a wireless system. The main consideration is usually the consumer unit, which may need upgrading separately to meet current regulations, but that is independent of the lighting control installation.

Listed buildings benefit significantly from wireless control. Because no new wiring is needed at the switch positions, there is no requirement for listed building consent to alter historic fabric. The keypads are surface mounted or replace existing switches, and the dimmers are hidden in ceiling voids.

Flats and apartments work well with wireless systems because there is no disruption to communal areas. Everything is contained within the flat itself.

What it looks like once installed

From the outside, a well installed lighting control system looks like it has always been there. The keypads sit where your old switches were (or wherever you want them, since wireless keypads can go on any wall). There are no visible hubs, boxes, or cables in the living spaces. The processor or hub is tucked away near the router or in a utility cupboard.

Both Lutron and Rako keypads come in a range of finishes to suit any interior. Lutron’s Sunnata range offers over 20 colours. Rako’s EOS range offers seven hand finished metal options with custom engraving. The keypads are one of the most visible upgrades in the room, and they look and feel significantly better than a standard plastic light switch.

The experience is simple. Press a button, the room changes. Press another button, it changes again. No app loading, no waiting, no connectivity issues. The system just works, every time.

Find out what is possible in your home

Every home is different, and the best way to understand what lighting control could look like in yours is to talk it through. We offer a free, no obligation consultation where we visit your home, look at the existing wiring and lighting layout, and recommend the right system for your situation.

Book a free lighting control consultation to get started.

You can also read more about the systems we install on our Lutron and Rako pages, or see our full lighting control services overview.