Quantum Construction and Design
Quantum Construction and Design

Quantum Construction and Design

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Discounts available
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Introduction: Hi my name is Willie Griffin I have been in the construction industry for 15+ years, I am a second generation contractor. My father was a contractor for 40+ years I received a tremendous amount of knowledge and wisdom from him. When I opened my construction business Quantum Construction and Design I wanted to provide customers a company of integrity, quality work, innovation, and honesty throughout the whole process of meeting a clients construction and design needs. My main goal when I work with a client is to make sure we perform above and beyond expectations. At the end of the day I want my clients amazed and happy with the services we can provide. Reach out today for a FREE ESTIMATE on your next project!!!!

Hired 7 times

Serves Los Angeles, CA

Background checked

License verified

5 employees

3 years in business

Payment methods

This pro accepts payments via Apple Pay, Cash, Check, Credit card, PayPal, Square cash app, Venmo, and Zelle.

Featured Projects

110 photos

  • Full bathroom Remodel

    Bathroom Remodel


Customers rated this pro highly for work quality, professionalism, and responsiveness.

Good 4.3

13 reviews


Read reviews that mention:

pro avatar
Mary T.
Dec 23, 2021

Hired on Thumbtack

Hired on Thumbtack

If you are looking for high quality work on your home then you should look no further than Quantum Construction. Earlier this year they both designed and constructed an amazing ADU for us. The unit was for a family member who was coming to live with us and who had mobility issues so there were some really speicifc things we needed put in and they were so accomodating. I couldn't have asked for a better experience. This company does absolutely incredible work and I consider myself very lucky to have found them.

Details: I'm just starting • Bedroom • Complete renovation • 1,000 - 1,500 sq ft • Home • I am the owner

General Contracting
pro avatar
Frank t.
Jul 13, 2021

Hired on Thumbtack

Hired on Thumbtack

Willie and his team are great, we had a plumbing issue with the shower water leaking to the first floor. I sent him some pictures and he gave a quote immediately (more complex problems probably require a detailed inspection) and we arranged for next day meeting. When his team arrived, they checked out the leak and confirmed that it would be the price we agreed upon. They worked fast and were creative in their problem solving where another company was unable to solve. They gave a great deal and saved the landlord thousands of dollars compared to the alternative. They gave us a one year warranty for their service which is indictive of the trust in their work. I greatly appreciate that. All in all, I think Willie and his team are professional, prompt, highly skilled, and extremely reasonable in pricing. Would hire again, 10 out of 10!

Details: Install bathroom tiles or flooring • Fix bathroom tiles or flooring • Fix water damage • Master bath • Home

Bathroom Remodel
pro avatar
Cesar M.
Oct 29, 2022

Hired on Thumbtack

Hired on Thumbtack

Quantum Roofing took down our roof on a Tuesday. Everything sounded good until the surprise rainstorm came through. I called them and told them it’s raining and we have nothing covering the roof! He came out the following day and we had water damage in outlets, drywall, insulation, blinds, and walls. At first Willie (the owner) sounded like everything would be good as new once they fixed it. After talking to some of his workers I found out they told him to cover the roof and he chose not to, very disappointing to find out. Then the roofing continued. We ended up getting about 16 punctures into the interior drywall while they were nailing down the new material. 6 of those are still visible after “patchwork”. The paintwork is shoddy as well. The paint doesn’t match in my sons room or the living room where most of the damage was. There is loose drywall above the cabinets where there was water damage and I confined it wasn’t replaced. Lastly I have 6 new cracks in the kitchen drywall where there were no issues before. I would not recommend.

Details: Full roof replacement • Roof lifespan is over • One story • 1,000 - 2,000 sq ft • More than 30 years old • As recommended by the pro • Home

Roof Installation or Replacement
pro avatar
Nat R.
May 6, 2021

Hired on Thumbtack

Hired on Thumbtack

I am very pleased with the kitchen remodel completed by quantum construction. Willie was very professional when it came to providing me an estimate, and following through with the plan that was made for the remodel. Willie provided good customer service, and the workers that came to complete the different tasks in my kitchen also provided excellent service. If there were any details that needed to be modified or fixed, willie followed through. I would definitely hire quantum construction again, for future remodels in my home.

Details: Repair of existing cabinetry or fixtures • No, plumbing will not need to be relocated • No, electrical will not need to be relocated • No existing plans - need design suggestions • Residential

Kitchen Remodel
pro avatar
Kenneth b.
Sep 22, 2021
Willie and his crew did an outstanding job on my roof. Lots of “extras” that I didn’t expect (vents, worn edging) really showed their professionalism. He responded to any and everything I asked. The cleanup was superb as well. If you need new roofing or repair, this is the place to call.

License Type: B - General Building Contractor (CA)

License verified on 4/8/2022

Background Check

Willie Griffin


  • What should the customer know about your pricing (e.g., discounts, fees)?

    Good work isn’t always cheap

  • How did you get started doing this type of work?

    I come from a family that has been in construction for 40+ years, so it was only natural for me to take up contracting. Above all construction has always been a passion of mine since I was a young child, I just love that you could take something old and create a masterpiece.

  • What advice would you give a customer looking to hire a provider in your area of work?

    Always look for a contractor that is communicative, responsive, honest, and transparent with what your project entails.

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