Electrical emergencies? Call us 24/7 — +44 7863 777689
— RESIDENTIAL · BUILD
EXTENSIONS & LOFT CONVERSIONS IN STEVENAGE
First and second fix electrical for every building project. We work alongside your builder from groundwork to finishing, keeping the electrical on time so the whole project stays on schedule.
NICEIC Certified
Jobs completed safely
Fully Insured
Residential & commercial
500+ Projects
Completed across UK
5-Star Rated
Google Reviews
NICEIC Certified
Jobs completed safely
Fully Insured
Residential & commercial
500+ Projects
Completed across UK
5-Star Rated
Google Reviews
On Time
EVERY PROJECT
— WHAT’S INCLUDED
First Fix to Final
Certificate.
We handle the full electrical scope of your build — from routing cables before the walls go up, through to fitting sockets and signing everything off when the project is complete. One electrician, one point of contact, zero delays.
First fix wiring — cables routed before plastering
Second fix — sockets, switches, and light fittings fitted
Consumer unit upgrade or new circuits added
Smoke and heat detector installation
Bathroom and en-suite electrical to Part P
Underfloor heating wiring and thermostat install
Full inspection and testing on completion
Electrical Installation Certificate issued same day
On Time
EVERY PROJECT
— WHY ONE ZERO —
Six Reasons to Choose Us
for Your Build.
Extension and loft electrical work needs a team that understands building projects — not just circuits.
We Keep Your Build on
Schedule
Old fuse boards lack RCD protection — the technology that cuts power instantly if a fault is detected. A modern board protects your family and your property.
We Work With Your
Builder
We install consumer units to the current 18th Edition wiring regulations. Every circuit is correctly rated, labelled, and protected with the right breaker.
Fully Certificated
Many mortgage lenders and home buyers require an up-to-date consumer unit. An upgrade removes a common blocker in property transactions.
Right First Time
Mistakes in first fix cost time and money to correct once walls are plastered. We plan and route cables correctly from the start — no rework, no delays.
Adds Value to Your
Property
A well-specified electrical installation — with the right number of sockets, circuits, and smart-ready wiring — adds real value to your finished space.
NICEIC Approved
All work is independently assessed to the highest industry standard. Our NICEIC approval gives you and your building control officer confidence in the work.
— TYPES OF WORK —
Extensions, Lofts, and Commercial Builds.
We upgrade consumer units and distribution boards across all property types. Same standard every time.
HOME EXTENSIONS
Single & Double Storey Extensions
Full electrical scope for side, rear, and wrap-around extensions. We work to your architect's spec and co-ordinate with your builder at every stage — first fix, second fix, and sign-off.
LOFT CONVERSIONS
Loft & Attic Conversions
New lighting circuits, sockets, en-suite electrics, and smoke detection for loft bedrooms and bathrooms. We route cables before boarding and return for second fix when you're ready.
LOFT CONVERSIONS
Loft & Attic Conversions
New lighting circuits, sockets, en-suite electrics, and smoke detection for loft bedrooms and bathrooms. We route cables before boarding and return for second fix when you're ready.
COMMERCIAL
Commercial Fit-Outs & Refurbs
Electrical fit-out for commercial extensions, office expansions, and retail refurbishments. We work around your trading hours and provide full documentation for building control.
COMMERCIAL
Commercial Fit-Outs & Refurbs
Electrical fit-out for commercial extensions, office expansions, and retail refurbishments. We work around your trading hours and provide full documentation for building control.
— FREQUENTLY ASK QUESTION
Build Questions,
Answered.
Common questions about extension and loft conversion electrical work. Still unsure? Give us a call.
When do you need to be on site for a loft or extension?
We attend at two key stages — first fix (before plastering, when cables are routed and back boxes fitted) and second fix (after plastering, when sockets, switches, and fittings are installed and tested). We'll co-ordinate directly with your builder to make sure we're on site at exactly the right time.
Do you work with builders and project managers?
Yes. We're experienced working as part of a wider build team. We liaise directly with your builder, architect, or project manager to make sure the electrical work integrates seamlessly with the rest of the project and never causes a delay.
Will the extension electrical work need to be certified?
Yes. All new electrical work in an extension or loft conversion must be certified under Part P of the Building Regulations. We issue an Electrical Installation Certificate (EIC) on completion and register the work with your local authority.
Can you add extra circuits to my existing consumer unit?
In many cases, yes — if your existing board has spare capacity and is in good condition. If not, we'll recommend an upgrade at the same time, which is often the most cost-effective approach when doing extension work.
How do I get a quote for extension electrical work?
We can often quote from architectural drawings or building plans before work starts. Alternatively, we can visit site to carry out a free survey. Contact us with your project details and we'll get back to you within 24 hours.
Ready to Get Started?
Get your free, no-obligation quote today. We'll respond within 24 hours — no hard sell, no hidden costs, no surprises.
Free, no-obligation quote
Response within 24 hours
NICEIC certified team
Free, no-obligation quote
Response within 24 hours
NICEIC certified team
Power, done properly. Certified electrical contractors for homes, businesses, and schools across United Kingdom.
GET A FREE QUOTE
Ready to get started? We'll respond within 24 hours.
© 2026 One Zero Electrical Ltd. All rights reserved. Website Created By: Elevate Media
© 2026 One Zero Electrical Ltd. All rights reserved.
Website Created By: Elevate Media