London homes are changing fast. EVs are replacing petrol cars. Solar panels are appearing on rooftops across every borough. Smart thermostats, app-controlled lighting, and home batteries are moving from luxury to mainstream. And with energy prices remaining volatile, the homes that are wired for the future are the ones that will cost the least to run.

If you're planning a renovation — or simply thinking ahead — now is the ideal time to future-proof your electrics. Here's what that looks like in practice.

Start With the Consumer Unit

Every upgrade starts here. Your consumer unit (fuse board) is the hub of your home's electrical system, and an outdated one will limit everything else you want to do.

Signs your consumer unit needs upgrading:

• It's more than 20 years old
• It uses rewirable fuses rather than circuit breakers
• There are no RCDs (Residual Current Devices) protecting your circuits
• It trips frequently or struggles with current load
• You're planning to add significant new electrical loads (EV charger, solar, hot tub)

A modern consumer unit with RCBOs (combined circuit breakers and RCDs) gives each circuit individual protection, makes fault-finding easier, and is a prerequisite for most new installations. If you're doing any significant electrical work, upgrading the consumer unit at the same time is almost always the most cost-effective approach.

Plan for EV Charging

Even if you don't own an electric vehicle yet, the statistics are clear: by 2030, the majority of new cars sold in the UK will be electric. Planning your wiring now — before walls are plastered and floors are laid — costs a fraction of what it will cost to retrofit later.

What future-proofing for EV looks like:

• A dedicated 32A circuit run from the consumer unit to your garage or parking area
• A 20mm conduit installed in the wall for future cable routing (even if no charger is fitted yet)
• Sufficient spare capacity in the consumer unit for a 7kW charger
• An outdoor-rated consumer unit if the charger will be in a detached garage

If you're already installing a charger, consider a smart charger that can be scheduled to charge during off-peak hours (typically midnight to 7am on most tariffs), which can cut your charging costs by 50–60%.

Add Solar-Ready Wiring

Solar panel installations have become one of the most popular home improvements in London, with payback periods now typically under 8 years for south-facing roofs. But the electrical work involved — DC cabling from roof to inverter, AC connection to the consumer unit, battery storage wiring — is much easier to plan in advance.

What solar-ready wiring involves:

• A dedicated AC circuit from the consumer unit for the inverter connection
• Conduit routes from the roof space to the utility area or garage
• Space in the consumer unit for the generation meter and export connection
• If adding a battery: a suitable location and circuit for the battery inverter

Even if you're not ready to install solar panels yet, having the wiring infrastructure in place means the installation itself will be faster, cheaper, and less disruptive.

Upgrade to LED Lighting Throughout

LED lighting has transformed what's possible with home lighting — and the energy savings are significant. A typical London home switching from halogen to LED can save £150–£250 per year on electricity bills, with bulbs lasting 15–25 years.

But the real opportunity is in the installation itself. If you're renovating, this is the time to:

• Install recessed LED downlights in kitchens, bathrooms, and living areas
• Add LED strip lighting under cabinets, in alcoves, and along staircases
• Fit smart lighting circuits that can be controlled by app, voice, or motion sensor
• Replace old fluorescent tubes in garages and utility rooms with LED panels

Modern LED dimmers require compatible LED bulbs and dimmers — mixing old dimmers with new LEDs causes flickering. A qualified electrician will specify the right combination.

Consider a PIV System for Damp and Condensation

Condensation and damp are among the most common problems in London homes — particularly in older Victorian and Edwardian properties with solid walls and limited ventilation. A Positive Input Ventilation (PIV) system is one of the most effective and affordable solutions.

A PIV unit is installed in the loft and gently pushes filtered, slightly warmed air into the property, creating a positive pressure that pushes moist, stale air out through natural gaps. The result is a drier, healthier home with significantly reduced condensation on windows and walls.

PIV systems are particularly effective for:

• Victorian and Edwardian terraces with solid walls
• Flats and maisonettes with limited natural ventilation
• Properties with persistent condensation or black mould
• Homes where occupants suffer from respiratory conditions

A PIV unit costs around £400–£600 installed and uses roughly the same electricity as a low-energy light bulb. For many London homeowners, it's one of the best-value home improvements available.

Install Outdoor Power and Lighting

With London gardens and outdoor spaces increasingly used as extensions of the home, outdoor electrical installations have become a priority for many homeowners. Done properly, they add real value and usability to your property.

Popular outdoor electrical upgrades:

• Weatherproof sockets on patios and in gardens for outdoor appliances
• Garden lighting — path lights, uplighters, festoon lighting
• Security lighting with PIR sensors
• Outdoor power for sheds and outbuildings — a dedicated circuit rather than an extension lead
• Hot tub or garden office supply — these require a dedicated circuit and often an EICR first

All outdoor electrical work must comply with Part P of the Building Regulations and be carried out by a registered electrician. Work in zones near water (within 3.5m of a pool or hot tub) has additional requirements under BS 7671.

Don't Forget Data and AV Infrastructure

Modern homes run on data as much as electricity. If you're renovating, this is the time to install the infrastructure that will support your home network for the next decade:

• Cat6 ethernet cabling to every room — far more reliable than Wi-Fi for TVs, gaming, and working from home
• Structured cabling cabinet in a central location for router, switches, and patch panel
• HDMI and data conduits behind TV walls to avoid visible cables
• Doorbell and intercom wiring for video doorbells and smart entry systems

Running cables through walls and floors is straightforward during a renovation. Retrofitting them later means lifting floorboards, chasing walls, and significantly more disruption and cost.

How to Plan Your Electrical Upgrade

The most cost-effective approach is to plan all your electrical upgrades together and carry them out in a single phase of work — ideally during a broader renovation. This avoids the cost of multiple call-out charges, repeated disruption, and the expense of re-opening walls and floors.

A typical future-proofing project for a London terraced house might include:

1. Consumer unit upgrade (with RCBOs and surge protection)
2. EV charger circuit (or conduit for future installation)
3. Solar-ready wiring and conduit routes
4. LED lighting throughout (with smart dimmer circuits)
5. PIV system installation
6. Outdoor sockets and garden lighting
7. Cat6 data cabling to key rooms

Carried out together, this kind of project typically costs £3,000–£6,000 depending on property size and specification — and can add significantly more than that to the value of your home.

Get a Free Survey and Quote

Olectrics specialises in whole-home electrical upgrades for London properties. We'll survey your home, advise on the most cost-effective approach, and provide a clear, itemised quote with no hidden costs.

We're NICEIC-approved, fully insured, and cover all 24 London boroughs.

Book a free survey → or call us to discuss your project.