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Location and Projects

Address
3646 W SLAUSON AVE, Los Angeles, CA, 90043
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Quantum Construction & Design

Quantum Construction & Design, 3646 W Slauson Ave, Los Angeles, CA (Employee: Willie Rodriguez Griffin) holds a General Building license according to the California license board.

Their BuildZoom score of 89 does not rank in the top 50% of California contractors.

Their license was verified as active when we last checked. If you are thinking of hiring Quantum Construction & Design, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.

Quantum Construction & Design Contact Information

Phone: (562) 743-8849
Address: 3646 W SLAUSON AVE, Los Angeles, CA 90043

Quantum Construction & Design Los Angeles

Quality

89
30th percentile
Pro tip: We generally recommend hiring a contractor with a score higher than 95.
Quantum Construction & Design has a BuildZoom score of 89, which places them above 30% of 336,931 contractors in California.

Activity

10 projects
2025
6 projects
2024
5 projects
2023
Our building permit records indicate that Quantum Construction & Design has worked on at least 21.0 projects over the past 3 years.

This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.

Experience

8 projects
Home Additions
4 projects
Kitchen remodels
3 projects
Multi-room remodels
Analyzing permits over the last 4 years shows that Quantum Construction & Design mostly works on home addition and kitchen remodel projects.

Pricing

2 projects
< $5k
3 projects
$5k-$20k
3 projects
$20k-$50k
4 projects
$50k-$100k
3 projects
$100k-$250k
Value Not Public: 10.0 projects
The typical size of their permits is approximately $46,500. This graph shows the distribution of these job values.
Pro tip: For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.

Quantum Construction & Design Reviews
1 out of 5 stars, based on 1 review

  • By Sushant G.
    April 6, 2021
    Kitchen Remodelig
    $4,000

    Very sloppy third class job.. over delayed my project.. Willie kept on giving me excuses.

    Willie is a third class Guy, he will cut corners wherever possible. He didn't even put plastic on my appliances beige starting working, he just started demolition without any covering. All my appliances and blinds are full of dirt and dust. He doesn't considers customer home to be his own home, rather a money churning machine.

    He treated my House as an abandoned house.

    He started the project on February 24th and finished it in March 17th 2021 and that was after threatening him lots of times. The kitchen floor is sloppy.. it's not straight. He once said he will rip off the whole kitchen ground and redo it, later he changed his mind. He sent two jokers at my house, who used to come at 12 pm, take one hour lunch and then used to leave at 3 pm. It seemed they were here on a picnic. They were not serious about work. My AC intake got chocked from the smoke of powder all over the place when the tiles were taken out. Willie or his workers never told me that I need to shut my AC off as it sucks the smoke powder from the work being done. I had to replace my AC Filter five Times. And lots of powder still went inside my intake, it might damage my central
    AC in the long run. Willie"s workers blew one of my Electric line. When I told Willie about it he never took the responsibility to
    Get it fixed. On the contrary he blamed me for
    It, so I had to pay $400 to get it fixed. Willie didn't realize that for 21 days all of the kitchen stuff was in my room and I was eating outside. Even after so many days the work is still not complete. He forgot to put a divider in one of the shelves, and this shouldn't have happened. I don't want to see Willie again and would never hire him again. I will have to get my kitchen redone from someone else now. So all this hassle for 21 days and loosing so much money was not worth it. The whole kitchen and my belongings in the kitchen are full of powder smoke, and it will take me 7-8 days to clean the kitchen. I have no idea how Willie got other 5 star reviews. His work
    Is totally sloppy, he keeps on forgetting things he is supposed to do, is unprofessional, I had to remind him several
    Times what needs to be done and what not. He behaves like a kid who doesn't know what he is doing. He was never involved in the kitchen remodeling. He never advised me on anything regarding kitchen. He just used to send his joker workers to work at my
    House. So many days the workers didn't even show up. I wish I would have hired someone else.

    He just used the old cabinet doors and drawer covers to put it back on the cabinets, who knows where they were lying for so many days. It seems Willie threw them in the garbage from last many
    Days and just brought them back from the garbage. I have skin problems and that is aggravating my skin problems, I cannot stand in the kitchen right now. Plus he was supposed to get new cabinets, he never told me that he will use the old door and old drawer covers back on the cabinets.

    He doesn't provide any list of what should I do before doing the construction, like taking out my food items from the shelf or covering my electronics. In fact on his third day of work his workers continued to the work without sticking the single plastic curtain they sticked on the first two days of their work. I have tenants in the house, and I had to go personally everyday to clean and vacuum their rooms. The white tile powder was all over the place. If you don't have a stern personality and cannot threat the contractor then your work would never be complete. Willie is just interested in money, his work is not detailed, he lies a lot, he will say you one day that he will show up with his workers next day but he never arrives, he just send his workers when he should be with them
    To supervise their work. His workers just come over as a formality to complete the job and do not have any experience of doing the job.

    Willie is lying about I asked for discount, it was him who offered discount for a 5 star review(see picture on google reviews)

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Building Permits by Quantum Construction & Design

Sort by: Notable Notable | Date Date | Job Value Job Value
Bldg-alter/repair
2025-06-05
Supplemental to permit # 22014-20000-04082 (also reference permit # 22014-20001-04082) change of contractor from ochoa victor manuel license # 908306 to quantum construction & design license # 1061867
Valuation:
N/A
Permit #:
22014-30002-04082
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-alter/repair
2025-06-05
Supplemental to permit # 22016-90000-35822 to change contractor from ochoa victor manuel license # 908306 to quantum construction & design license #1061867
Valuation:
N/A
Permit #:
22016-30002-35822
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Adding led lighting at the ceiling comply with department order effective date 05/14/2024. permit will expire 30 days from issuance date. all permits shall be for the same time period limitation. if additional assistance is needed please call inspector jeffrey difiore at (818)374-9830 of general enforcement north. ceis case number is 1004978
Valuation:
N/A
Permit #:
24041-10000-37578
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Replace faucet in bathroom comply with department order effective date 05/14/2024. permit will expire 30 days from issuance date. all permits shall be for the same time period limitation. if additional assistance is needed please call inspector jeffrey difiore at (818)374-9830 of general enforcement north
Valuation:
N/A
Permit #:
24042-10000-15699
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Bldg-addition
2025-03-04
Addition & remodel and change s.f.d. to adu per ordinance (rear bldg.) *** 2 of 3 ***
Valuation:
$110,000
Permit #:
24014-30000-05581
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Demolish existing garage except 16.15 lf of footing and rebuild new all electric accessory dwelling unit per lamc 12.22 a.33(b)(1). all work per engineering
Valuation:
$54,540
Permit #:
25014-10000-01243
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 28'-7 1/2"x 19'-8 1/2 irregular shaped accessory dwelling unit per gc 66323(a)(2) npfa 13-d fire sprinklers required throughout
Valuation:
$75,000
Permit #:
24010-20000-04972
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-addition
2025-03-04
Addition & remodel to (e) s.f.d. (front bldg.) *** 1 of 3 ***
Valuation:
$110,000
Permit #:
24014-30000-05580
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Service panel being relocated to the adu and installing a subpanel in place where existing service panel was located
Valuation:
N/A
Permit #:
25041-90000-06810
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-alter/repair
2025-06-23
Supplementa to 24014-30000-05580 *** revision to structural plans and new sky light *** 1 of 3 ***
Valuation:
$501
Permit #:
24014-30001-05580
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-alter/repair
2025-06-23
Supplemental to 24014-30000-05581*** revision to structural plans and new sky light ---1 of 3---
Valuation:
$501
Permit #:
24014-30001-05581
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-alter/repair
2025-06-23
Supplemental to 24010-30000-05197*** revision to structural plans and new sky light ---1 of 3---
Valuation:
$501
Permit #:
24010-30001-05197
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-alter/repair
2025-06-05
Supplemental to permit 22016-90000-35822 to change contractor to quantum construction & design
Valuation:
N/A
Permit #:
22016-10001-35822
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-alter/repair
2025-06-04
(1) kitchen remodel for residential buildings (no structural changes). meps included
Valuation:
$8,500
Permit #:
25016-10000-07050
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Bldg-addition
2024-01-27
New irregular-shaped 378 square foot addition to rear of existing single-family dwelling plus remodel. all work done per engineered design
Valuation:
$48,000
Permit #:
23014-10000-01386
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 2-car garage *** 3 of 3 ***
Valuation:
$55,000
Permit #:
24010-30000-05197
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Addition to (e) garage to create (n) adu per lamc 12.22 a.33(c) and (d)
Valuation:
$105,000
Permit #:
22014-10000-02091
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 23044-10000-23951 to change address to 1206-1208 1/2 n. edgemont st and addition (4) bathroom (4) dryer (4) kitchen vents and (8) air handeling units
Valuation:
N/A
Permit #:
23044-10001-23951
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Bldg-alter/repair
2023-11-14
Supplemental to 22016-10000-32379 to omit new attached pergola from scope of work revise skylights and revise electrical. work done per engineer design
Valuation:
$10,000
Permit #:
22016-10002-32379
Status:
plancheck
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Plumbing permit
2025-06-11
Convert attached garage to adu (400 sq ft)
Valuation:
N/A
Permit #:
PLM25-00573
Status:
issued
Fee:
$287
Permit Type:
N/A
Building Type:
N/A