About Us

Serving the Residential, Commercial and Interior Design community of the Delaware Valley with integrity and expertise since 1993 – at Chelsvig Electric, we apply our dedication to quality, trust our extensive experience and treat people with honesty in addressing each of our customers’ specific needs.

Our Specialties

We stay current with the latest home technologies. We know how to properly install today’s high-tech wiring and designer lighting in existing homes. Our training, skills and experience will help you select systems best-suited to your individual needs and lifestyle. All of our work meets professional standards for execution and appearance.

General Residential Services – Interior and Exterior

* Emergency and Service Calls of any scope
* Trouble Shooting, Residential and Commercial
* New or Upgraded Electrical Services
* Whole House or Partial Rewiring
* Old Wire, Knob and Tube Removal
* Updating Lighting
* Landscape Lighting and Occasional Lighting
* Low Voltage Wiring
* New Construction Wiring
* Generator Installation

Chelsvig Electric high-tech home services include:

* Home Theater System Wiring
* Flat Screen TV Installations
* Speaker Installations
* Data Wiring for high speed networks and distributed audio/video


Established in 1993, Chelsvig Electric traces its roots back to Iowa and its Midwestern values. “That’s where I first worked in the building trades,” says owner, Mark Chelsvig, “and where I was taught how all the individual trades worked together to complete a job–from beginning to the end–so that the final job was ‘clean’ outside, where everyone could see it, and inside, behind the finished walls. That was the standard I learned and the standard I still follow.”

Family owned and operated, Mark Chelsvig has a long and productive working relationship with homeowners. We know what homeowners prize the most: honest pricing, quality work, and sound advice. You’ll get all three at Chelsvig Electric–with a comfort level and assurance that all our work will be precisely done and your house left neat and clean. You’ll also get pricing options and technical choices that let you make informed decisions and avoid unexpected surprises.


New Jersey State Electrical License #34EI01769900
Delaware State Electrical License #T1-0006028
Philadelphia Electrical License #43052


– Emergency Coverage
– Knob and Tube Removal
– Ceiling fans
– Recessed lighting
– Outdoor lighting
– Heaters
– Generator Installation
– Home Theater System Wiring
– Flat Screen TV Installations
– Speaker Installations
– Data Wiring for High Speed
– Display/Showroom Lighting
– Installation wiring for machinery
– General wiring
– Security lighting and cameras
– Single and 3-Phase wiring


– Ardmore
– Bala Cynwyd
– Berwyn
– Broomall
– Bryn Mawr
– Chestnut Hill
– Devon
– Gladwyne
– Haverford
– Main Line
– Media
– Merion
– Narberth
– Newtown Square
– Overbrook Farms
– Paoli
– Philadelphia
– Penn Valley
– Penn Wynne
– Rosemont
– St. David’s
– Strafford
– Villanova
– Wayne
– Wynnewood

Additonally, we are fully licensed to work in both New Jersey and Delaware.

Call Us Today