Smart Wiring and Future Proofing: What It Costs to Build In Now

Cables, routes and spare capacity are cheap while the walls are open and expensive afterwards. Here is what each element costs you and which ones are worth it.

Future proofing a house is mostly about routes rather than devices. A conduit with a draw string, a deep back box, a riser with spare capacity and a small equipment cupboard are inexpensive during first fix and extremely expensive to create later. Devices date quickly and get replaced; the infrastructure behind them lasts as long as the building. This breakdown separates the two so you can spend where the money cannot be spent again.

What this number does and does not include

This covers infrastructure and installation cost during construction: containment, cabling, back boxes, panels and the space that houses them, plus the labour to install them. It does not cover the price of the devices themselves, which change constantly, nor subscription services, nor the design fee for a specialist consultant on a larger project. It assumes a new build where the walls are open.

Spare conduit routes with draw strings

This is the single highest value item in the list. A conduit from the equipment position to each room, left empty with a draw string in it, means any future cable can be pulled through without breaking a wall. It costs the price of the conduit plus a small amount of labour at a time when the installer is already working in that wall.

• Pushes it up: A larger house, more rooms, longer routes and more destinations such as gates, garages, pool plant and outbuildings.
• Brings it down: Grouping destinations so several rooms share a route to a nearby node instead of each running to a central point.
• How to control it: Specify spare routes as a numbered schedule and verify draw strings are present and reachable at handover.

Structured data cabling

Fixed data cabling to each room, terminated in a patch panel, outperforms wireless for anything that matters and supports access points, cameras, televisions and controls. The cost is the cable, the outlets, the panel and the termination labour, and the cable category chosen affects both price and how long the installation stays relevant.

• Pushes it up: Higher cable categories, more outlets per room, long runs and a large number of camera positions.
• Brings it down: A realistic outlet count per room and a single well placed access point location per floor instead of outlets everywhere.
• How to control it: Agree an outlet schedule room by room at design stage and test every link after termination.

The equipment position itself

Controls, patch panels, network equipment, amplifiers and power supplies need somewhere to live that is ventilated, powered, accessible and not in a bedroom wardrobe. Creating that space costs floor area and a little joinery during construction. Finding it afterwards usually means sacrificing a cupboard in a finished house.

• Pushes it up: Large systems with many components, equipment that generates heat and needs ventilation or cooling.
• Brings it down: Consolidating into one well planned cabinet rather than several scattered positions.
• How to control it: Fix the equipment position on the plans early and confirm power, ventilation and access are shown.

Deep back boxes and extra cable at outlets

Modern switches, controllers and keypads are deeper than traditional ones and need more room behind them, and most need a neutral conductor at the switch position. Installing deeper boxes and running the extra conductor now costs very little. Discovering later that every switch box is too shallow means opening every one.

• Pushes it up: A large number of switch positions and a decision to use keypads rather than standard plates.
• Brings it down: Standardising on one box depth and one wiring arrangement throughout rather than mixing.
• How to control it: Specify the box depth and the conductors at each switch position before first fix starts.

Lighting control infrastructure

Dimming, scene control and zoning depend on how circuits were divided and where the control gear sits. Splitting a room into several controlled groups costs circuit and cable at first fix. Retrofitting the same control into a room wired as one circuit means new cable in finished walls or accepting wireless devices with their own limitations.

• Pushes it up: Many zones per room, specialist dimmable sources and a centralised rather than local control architecture.
• Brings it down: Choosing which rooms genuinely benefit from layered control rather than applying it everywhere.
• How to control it: Set the circuit split per room on the lighting drawings and check it against the board schedule.

Security, access and camera provision

Camera positions, door station cabling, gate control, sensor wiring and a recording position each need a cable route and, usually, a power supply. The cameras themselves will be replaced several times over the life of the house, so the value sits in the routes and in power being available where a camera will plausibly be wanted.

• Pushes it up: A large plot, several gates, outbuildings, and camera positions on poles or boundaries far from the house.
• Brings it down: Agreeing a realistic camera position list rather than wiring every external corner.
• How to control it: Mark every position on a plan, confirm power and data at each, and leave spare capacity at the recorder.

Audio, television and screen positions

Cable to screen and speaker positions, with a power outlet and enough slack behind a wall mounted screen, is a first fix decision. Ceiling speakers need the cable before the ceiling closes. The cost is small and it removes the trailing cables and surface trunking that otherwise appear in a finished room.

• Pushes it up: Many rooms with ceiling speakers, outdoor zones, and screens in positions far from the equipment cabinet.
• Brings it down: Limiting cabled positions to the rooms where it will genuinely be used.
• How to control it: Confirm screen heights and speaker positions against the furniture layout before cables are fixed.

Spare electrical capacity and future loads

A vehicle charger, a pool, a workshop or an extension all need capacity and a route. Providing a spare way in the board, a cable route to the garage or the boundary, and headroom in the supply arrangement is far cheaper now than upgrading later, which can involve the utility connection itself.

• Pushes it up: Larger anticipated future loads and long routes to the point of use.
• Brings it down: Deciding which future loads are realistic rather than providing for every possibility.
• How to control it: List the anticipated future loads with the electrical engineer and confirm both board capacity and routes.

Costs that never appear on the first page

• Coordination time when the automation specialist is appointed after the electrical layout is fixed.
• Rework where a switch position conflicts with joinery that was designed later.
• Cooling or ventilation for an equipment cabinet that was planned without considering heat.
• Commissioning and programming, which is labour rather than material and is often underestimated.
• Repeat visits for handover training and adjustments after the owner moves in.
• Replacing devices that have been discontinued, where the replacement does not fit the original back box.

Keeping the budget honest

Separate the budget into infrastructure and devices, and protect the infrastructure line when the budget is cut. Conduit, cable, boxes, routes and spare capacity are what you cannot buy again without demolition, while devices can be added one room at a time over years. An owner who installs full containment and basic devices has a house that improves over time. An owner who installs premium devices on minimal infrastructure has a house that is already finished.

• At design stage, when the electrical layout and any automation scope are coordinated.
• Before first fix starts, confirming box depths, spare routes and the equipment position.
• After first fix and before plastering, verifying that every spare route exists with a draw string.
• At data cable termination, when every link should be tested and the results recorded.
• At handover, checking the schedules, labels and documentation against what was installed.

Domira builds and supervises projects across Saudi Arabia, and this is the level of detail its site teams work at. Send the drawings or the site, and Domira will tell you what the specification has to say before anyone prices it.