Retrofit vs new-build smart home: what’s possible in an existing house

The sentence we hear more than any other is some version of this: “We’d love all of that — but we’re not tearing the house apart for it.”

It is a fair worry, and twenty years ago it was a fair objection. It is not any more. Retrofit is a large share of our work at Hidden Home Technology, much of it in exactly the kind of period property people assume is off-limits. Here is an honest account of what works in an existing house, what still deserves cable, and what a new build or renovation lets you do that nothing else can.

The short answer

Almost everything on the usual wish list can be done in a finished house.

Wireless lighting control is the clearest example. Rako — a British company — built its reputation on wireless systems that replace ordinary switches without chasing walls, and Lutron’s wireless options are similarly proven. A period home can gain engraved keypads, lighting scenes and schedules with the decoration untouched. Multi-room audio no longer demands cable to every corner; heating zones can be brought under the same control; and a whole-house system from Control4 or URC can sit over the top, tying new and existing equipment into one app.

So the honest starting point is this: if you want a smarter house, the age of the building is rarely the obstacle people expect.

What a retrofit actually looks like

Every retrofit starts with a survey — of the house, and of how you live in it. From there we design wireless-first and cable only where it genuinely counts, which usually means a handful of strategic runs rather than a rewire: to the television wall, perhaps, or between floors where a wired link will do the heavy lifting for everything else.

The work is planned around the household. Rooms are done and put back one at a time, decoration is respected, and the system can be phased — lighting first, say, with audio and shading following later under the same control. In period and listed properties we work carefully with the original fabric; wireless control exists precisely so that a Georgian wall never has to be opened for a light switch.

Existing equipment earns its place too. A good control system is as happy running the television and amplifier you already own as anything new, so a retrofit rarely means starting again — it means bringing what you have under one roof, then upgrading piece by piece as and when it suits you.

What still deserves cable

We would rather tell you this before you start than after. Some things are simply better wired:

• In-ceiling and in-wall speakers need access to the void behind them — easy when a ceiling is down or a room is being replastered, disruptive otherwise.
• Cameras and wireless access points work best with a cabled connection, however wireless everything else is.
• A wired backbone between floors and to the equipment cupboard beats any amount of clever wireless, and makes everything sitting on it more reliable.
• A cinema or serious media room wants dedicated cabling, full stop.

None of this blocks a retrofit; it shapes one. And if you are redecorating, recarpeting or lifting floors anyway, tell us — an hour of cabling at the right moment saves a day of it at the wrong one.

If you are building or renovating anyway

A new build or major renovation removes the compromises. With the walls open, everything can be wired properly from day one: speaker positions, keypad positions, shading, cameras, and network points wherever they might one day be wanted. Spare capacity costs very little at this stage — an empty conduit is the cheapest future-proofing there is — and buys decades of flexibility.

The one thing that matters is timing. The value we add on a new build is largely at drawing stage, before the electrician prices the job: deciding circuits and keypad positions with the architect, producing cable schedules the trades can build from, and making sure first-fix happens once, correctly. Brought in early, the technology slots into the programme; brought in late, it competes with it.

The honest comparison

Retrofit. No rewire, no building site, phased at your pace, and excellent results — especially for lighting control, heating and whole-house control. The compromises are at the edges: anything living inside walls and ceilings needs access, so a few items may wait for the room to be decorated, or be designed around.

New build or renovation. Everything wired, everything hidden, capacity for whatever comes next. The trade is that decisions must be made early, on paper, before the plaster goes on.

Both routes end in the same place: one system, one app, a house that behaves. The difference is the path, not the destination.

Which is your house?

Either way, the next step is the same — a conversation and a walk round the house (or the drawings). Our smart home and home automation installation page covers what a whole-house system includes and how we deliver it across Bath, Bristol and the South West, and our lighting design and control and multi-room audio pages go deeper on the two most common starting points.

Get in touch — and if you are mid-renovation, sooner is genuinely better than later.