
Full Electrical Design & Installation for Commercial Buildings
From architect's drawings to final certification. Full electrical design and installation for new commercial builds, extensions, and fit-outs across Essex and Greater London. One accredited team, one point of accountability, start to finish.
What Wren Covers
One Contractor for Design and Install
What a full design & install covers
Splitting design from installation creates gaps — specifications that don't match site conditions, or installers working to a design nobody's checked against building regs.
We design the electrical installation and install it ourselves, so what's on the drawing is what goes in the wall. One team, one point of contact, from first conversation to final sign-off.
What Wren Covers
One Contractor for Design and Install
What a full design & install covers
Splitting design from installation creates gaps — specifications that don't match site conditions, or installers working to a design nobody's checked against building regs.
We design the electrical installation and install it ourselves, so what's on the drawing is what goes in the wall. One team, one point of contact, from first conversation to final sign-off.
Electrical design from architect's drawings, including load calculations and distribution design
First and second fix electrical installation
Consumer unit, distribution board, and sub-main specification for the building
Coordination with the principal contractor and other trades on site
Building Regulations Part P notification and certification
Testing, inspection, and handover documentation
FAQs
Got Questions?
We’re here to make Wren Electrical easy to understand.
Still got questions?
What's the difference between design & install and standard installation?
Standard installation works to a design someone else has already produced. Design & install means we specify the electrical system from the architect's drawings ourselves, then install it — so the design and the installation are done by the same accredited team.
Can you work from our architect's or M&E consultant's drawings?
Do you handle Building Regulations notification for commercial electrical work?
What types of commercial projects do you deliver full design & install for?
At what stage should we bring you in on a commercial project?
What's the difference between design & install and standard installation?
Standard installation works to a design someone else has already produced. Design & install means we specify the electrical system from the architect's drawings ourselves, then install it — so the design and the installation are done by the same accredited team.



