New Build & Extension Electrician Rotherham

Electrical Installation for New Builds & Extensions

Whether you are adding a single-storey extension to a semi in Wickersley, converting a loft in Maltby, or building a new home from the ground up in rural South Yorkshire, getting the electrics right from the start is one of the smartest decisions you can make. Proper electrical design at first fix stage saves you money, avoids costly rework after plastering, and means everything works exactly the way you want it from day one.

At MP Electrical, we work with homeowners, builders and architects across Rotherham, Sheffield, Doncaster and Barnsley to deliver safe, well-planned electrical installations for every type of new construction project. We handle everything from initial design through to final testing and certification.

Types of Projects We Cover

We provide full electrical installations for all types of residential and commercial construction work, including:

• House extensions — single storey, double storey and wrap-around extensions
• Loft conversions — dormer, hip-to-gable, mansard and Velux conversions
• Garage conversions — turning unused garages into living spaces, home offices or gyms
• Garden rooms and outbuildings — fully wired garden offices, studios and workshops
• Annexes — self-contained living spaces with independent circuits
• New build homes — complete electrical installations for new-build properties
• Barn conversions — sympathetic installations for period and agricultural buildings
• Commercial fit-outs — offices, retail units and small commercial premises

First Fix & Second Fix — What Happens at Each Stage

Electrical work on any new build or extension is carried out in two distinct phases, and understanding the difference helps you plan your project timeline:

First fix is the rough-in stage. This happens after the walls are studded out but before any plastering. We install the cabling behind walls, run feeds to where your sockets, switches and light fittings will go, and put in back boxes for everything. We also run any specialist cabling at this point — data cables, speaker wires, underfloor heating feeds and EV charger supplies. Getting first fix right is critical because once the walls are plastered, making changes becomes expensive and disruptive.

Second fix comes after plastering and decoration. This is when we fit the faceplates on sockets and switches, hang light fittings, wire in appliances, connect the consumer unit and carry out full testing and certification. Your electrics are live and ready to use at the end of second fix.

Part P Building Regulations & NAPIT Certification

All new electrical installations in extensions and new builds must comply with Part P of the Building Regulations. As a NAPIT-registered electrician, Mat can self-certify all electrical work, which means you do not need to arrange or pay for a separate Building Control inspection for the electrical installation. We handle the notification to Building Control and issue you with a Part P compliance certificate directly. This saves you both time and money, and gives your builder one less trade to coordinate with the council.

Working With Your Builder

Timing is everything on a building project. We have worked alongside dozens of builders, plasterers and plumbers across South Yorkshire, and we understand how important it is to turn up on the right day, get the work done efficiently, and not hold up the next trade. Mat coordinates directly with your builder to schedule first fix and second fix visits at exactly the right point in the build programme. We are reliable, we communicate clearly, and we do not leave your builder waiting around.

Planning Your Electrics — What to Think About

The design stage is your chance to get everything exactly where you want it. Here is what we will discuss with you before any work begins:

• Socket positions — enough sockets in the right places, including USB charging sockets where you need them
• Lighting layout — downlights, pendants, dimmer switches and feature lighting to suit each room
• Dedicated circuits — separate circuits for cookers, ovens, hot tubs and electric showers
• Smart home pre-wiring — neutral wires at switch positions for smart switches, and cabling for smart doorbells and cameras
• EV charger pre-wiring — running a cable to the garage or driveway now so a charger can be fitted quickly later
• Data cabling — Cat6 network points for home offices and media rooms
• Underfloor heating circuits — dedicated supplies and thermostat wiring for electric UFH systems
• Outdoor lighting — garden lights, security lights and power supplies for outbuildings

It is always cheaper and easier to run cables during first fix than to retrofit them later. Even if you are not planning an EV charger or garden room right now, pre-wiring at build stage costs very little and saves a lot down the line.

Areas We Cover

We carry out new build and extension electrical work across South Yorkshire, including:

• Rotherham (S60–S66) — Rotherham town centre, Brinsworth, Catcliffe, Whiston, Wickersley, Maltby, Thurcroft, Dinnington, Rawmarsh, Wath-upon-Dearne, Swinton
• Sheffield (S1–S20, S35–S36) — Sheffield city centre, Hillsborough, Ecclesall, Totley, Chapeltown, Ecclesfield, Stocksbridge
• Doncaster (DN1–DN12) — Doncaster town centre, Bessacarr, Balby, Conisbrough, Mexborough, Thorne, Hatfield
• Barnsley (S70–S75) — Barnsley town centre, Wombwell, Hoyland, Penistone, Darton, Royston, Cudworth

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