Homes and renovations
Electrical additions, alterations and upgrades completed around the way the property is built and used.
- Lighting, sockets and new circuits
- Renovation and alteration work
- EV charging and backup-power connections
Electrical services · Christchurch and South Island
Electrical work planned for the site—not just the quickest fix.
Grenz Electrical completes residential and commercial electrical work from our Christchurch base, with South Island project coverage. The team combines practical installation experience with inspector-led attention to testing, documentation and long-term serviceability.
Registered electrical teamInstallation, testing and certification handled properlyResidential and commercialFrom a single repair to larger project deliverySouth Island coverageChristchurch based and resourced for regional work
What is included
Electrical work with the practical details included.
The right scope depends on the existing installation, the property and what the finished system needs to do. We identify constraints early and explain the options clearly.
Commercial electrical work
Planned electrical work for commercial sites, fit-outs and project programmes where coordination matters.
- Commercial installation and upgrades
- Equipment supplies and dedicated circuits
- Testing, labelling and handover records
Switchboards and fault finding
Clear investigation before parts are changed, followed by a practical repair or upgrade plan.
- Switchboard repairs and upgrades
- Electrical fault finding
- Urgent electrical callouts by phone
From first look to handover
A tidy result starts before anyone picks up a tool.
We check the existing installation, confirm the scope and make sure access, protection, testing and certification are considered from the start.
- 01Understand the requirement
We review the problem, intended outcome, existing supply and any likely constraints before confirming the scope.
- 02Complete the work carefully
The team protects the property, communicates changes and keeps the installation serviceable and tidy.
- 03Test and document
Required testing, certification, labels and handover information are completed as part of the job.
Service area
Christchurch based. South Island capable.
Our team is based in Christchurch and completes installation and inspection work throughout Canterbury and across the wider South Island. Project location, access, programme and scope are considered before we confirm attendance.
ChristchurchCanterburySelwynWaimakaririWider South Island
Talk to the installation team
Start with the site, the problem and the outcome you need.
Send a clear description and any useful photos, plans or power bills. We will come back to you with the practical next step.