General Contractor in Seal Beach, California

Kustum Kunstrukshun is a full service building, remodeling and renovation company. We specialize in the greater Seal Beach area and have been in business since 2002. We have earned an excellent reputation for high quality craftsmanship and expert project management. Let us be your general contractor for your next renovation or addition project!

At Kustum Kunstrukshun our primary objective is customer service. We believe that effective communication is the key to a successful project and a satisfied client. Whether installing a door or designing and building a complete home, our goal is to exceed the client’s expectations. Quality construction and aesthetic superiority are the signatures of the kind of high quality service we offer.

Some of the contracting services we offer are:

  • Full Kitchen remodeling
  • Full Bathroom remodeling
  • Custom patio and decks
  • Drywall hanging and finishing
  • Laminate, tile and wood floor repairs and replacements
  • Custom designed built-in cabinets
  • Interior and exterior trim Work
  • Exterior remodeling
  • Home additions such as room additions, “man caves” and more
  • Water damage restoration
  • Fire damage restoration
  • Balcony and insurance inspections

And much, much more!

Whatever work you need done, trust your home remodeling, renovation, and repair work to only the most committed, skilled, and trustworthy general contractor available. If you’re not sure whether we can remodel, repair, or build what it is you need built, simply give us a call at (562) 370-6080 or fill out our contact form here. Let Kustum Kunstruksun be your one-stop source for all of your contracting or renovation needs in Seal Beach, California. Give us a call today!

Listen Now!


Ronnie Kovach



I am remodeling and needed a general contractor to build a wall to turn an open space into an additional bedroom. A relative recommended Kustum Kunstrukshun from their recent bathroom remodel. Josh and his team did an amazing job!! The work is gorgeous and seamless! He put in French doors, worked the wall with the new flooring, and even patched some holes throughout the house with drywall. He was friendly, reliable, and finished the job within the estimated time given. I’ve had many different contractors during this remodel this year and I am most impressed by Kustum Kunstrukshun. I would definitely recommend Josh and his team for any general contracting jobs.

V Duran
December 16, 2023

My review is long overdue! I had the pleasure of working with Josh from Kustum Kunstrukshun about four years ago for a bathroom remodel in a home in La Palma, Orange County. He and his team were amazing. They completed the project on time and were attentive to every detail. Their work has been long lasting, not one problem has arisen yet. Also, the pricing is fair. I am so happy with this team I’ve recommended them to all my family and friends (my sister just used him sparking this review (she is also very satisfied with his craftsmanship)).

Deborah Natasha Carlisle
December 16, 2023

The time came to replace the old-fashioned tub with a walk-in shower for safety purposes. Josh and his crew and subs did an excellent job from ripping everything down to the studs to waterproofing , meticulously setting tile, plumbing the new shower head, regulator and installing the sliding glass doors. I’m enjoying it every day!

Diane Wood Gaughen, M.A. C.H.C. FDN-P
Author and Speaker - Master Bible Teacher and Health Coach
December 16, 2023

Josh Muller President, Kustum Kunstrukshun