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Location and Projects

Address
Concord, Ca 94520, United States, Concord, CA, 94520
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J Construction Group

Renovate Your Home with Confidence
From kitchen and bathroom remodels to new additions, we turn your home renovation dreams into a reality. We're also experts in building ADUs (Accessory Dwelling Units), helping you create the perfect space for family, guests, or a new source of income.

With a focus on quality craftsmanship and clear communication, we work closely with you from start to finish. Our goal is to make the renovation process smooth and enjoyable, delivering a final product you'll love for years to come.

From BuildZoom: J Construction Group, Concord, CA (Owned by: Christian Jimenez Quiroz) holds a Renovation license and 1 other license according to the Environmental Protection Agency license board.

Their BuildZoom score of 177 ranks in the top 1% of 336,931 California licensed contractors.

Their license was verified as active when we last checked. If you are thinking of hiring J Construction Group, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.

J Construction Group Contact Information

Phone: (510) 586-1581
Address: Concord, Ca 94520, United States, Concord, CA 94520

J Construction Group Concord

Quality

177
99th percentile
How is the BuildZoom score calculated?
Pro tip: We generally recommend hiring a contractor with a score higher than 95.
J Construction Group has a BuildZoom score of 177, which places them above 99% of 336,931 contractors in California.

Activity

1 project
 2025
2 projects
 2024
6 projects
 2023
Our building permit records indicate that J Construction Group has worked on at least 9.0 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

6 projects
 Kitchen remodels
Analyzing permits over the last 4 years shows that J Construction Group mostly works on kitchen remodel projects.

Pricing

1 project
 $5k-$20k
3 projects
 $20k-$50k
1 project
 $250k-$500k
Value Not Public: 4.0 projects
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.

J Construction Group Reviews
5 out of 5 stars, based on 3 reviews

  • By Jennifer B.
    September 5, 2025
    Verified Hire

    I hired Christian because of his amazing vision for my kitchen/dining area remodel. Christian and his team of amazing employees went above and beyond to make sure the job was done right. The timeline ended up going over due to some unknown damage from the previous owners of the house but he and his team made sure that they repaired the existing damage and ensured that it would never be a problem again.

    My kitchen turned out amazing and he ended up replacing the flooring and baseboards on my entire first floor.

    I now have a contractor for life. Next project: bathroom remodel!
  • By Galina K.
    December 10, 2021
    Verified Hire
    Garage Construction project

    We hired Christian for our project because he is very confident and he knew what he was doing. He took our garage project very seriously and did well. He listened to our requirements and accommodated. His crew is also very responsible and organized. The price was reasonable as well. We are happy that we chose him to do our project. I would definitely recommend him and we plan on hiring him again in the future too.
  • By Jonathan
    May 28, 2021
    Verified Hire
    Laundry room and powder room

    Super nice person, great attention to detail, good communication, fair price. Very professional. Highly recommended.
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Building Permits by J Construction Group

Sort by: Notable Notable | Date Date | Job Value Job Value

This is a sample of this contractor's permits. Click here to access their complete permit history.

Building/residential/r/adu-2nd unit
1191 Vacation Dr, Lafayette, CA, 94549
2023-06-21
Convert existing garage into new jadu and existing lower lvl into new adu. 400a serice panel upgrade. interior remodel of uper floor **2/14/24 revision to scope. change msp to 200a upgrade. cm** **9/24/24 revision changong msp bcak to 400a as origianl plans state. cm**
Valuation:
N/A
Permit #:
BIR23-007563
Status:
final
Fee:
$9,480
Permit Type:
N/A
Building Type:
N/A
Permit submittal
1191 Vacation Dr, Lafayette, CA, 94549
2023-03-27
Currently the home is a 2-story 3 bedroom 2 bathroom single-family home. the owner is looking to legalize the remodel that has been done on the 2nd floor convert the existing first floor into an adu and convert the garage into a jadu. the second floor has a new kitchen 2 renovated bathrooms new lighting updated switches and outlets constructed pergola structure in the backyard and new... see more
Valuation:
N/A
Permit #:
BISUB23-00924
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration permit
1556 Manzanita Ave, San Leandro, CA, 94579
2024-06-27
Reroof: tear off (e) roofing install 12 sq. comparable. shingles kitchen and bathroom remodel bring electrical up to current code - layout to remain as is replace 9 windows bedroom windows must meet egress per cbc 2022. rev. added scope - 100 amp subpanel rev. added scope- 50 000 btu wall heater
Valuation:
$37,200
Permit #:
BRALT-24-0250
Status:
final
Fee:
$1,632
Permit Type:
Interior remodel
Building Type:
N/A
Residential additions
117 Feliz Ct, Danville, CA, 94526
2023-05-18
Convert garage 260 sf to liv/add 210/gar 481/cov porch 87 remodel existing house w/pem
Valuation:
$371,258
Permit #:
B22-016275
Status:
final
Fee:
$4,330
Permit Type:
N/A
Building Type:
N/A
Garage conversion to living space/adu (no new sqft) kitchen/bath remodel house alteration
2421 Park Estates Dr, Sacramento, CA, 95825
2023-12-29
Kitchen: remove existing cabinets and replace them with new ones like to like. remove existing appliances and replace them with new ones like to like. layout to remain as existing. bathroom 1: remove existing tub toilet and vanity and replace with new. layout to remain as is. bathroom 2: remove existing tub toilet and vanity and replace wiith new. layour to remain as is
Valuation:
$45,000
Permit #:
CBAR2023-01227
Status:
complete
Fee:
$846
Permit Type:
Flat rate basic k...
Building Type:
N/A
Residential remodel or alteration
1515 Buckeye Ct, Pinole, CA, 94564
2024-06-18
Remodel kitchen 2 &1/2 bathrooms and bar
Valuation:
N/A
Permit #:
BP24-0110
Status:
final
Fee:
$3,775
Permit Type:
Remodel/alteratio...
Building Type:
N/A
Permit submittal
18 Alves Ln, Bay Point, CA, 94565
2023-10-03
Building a detached residential adu of 795 sq ft. (2) bedroom (2) bathroom in the back of the property (1) kitchen our goal is to abide by the 2020 adu ordinance
Valuation:
N/A
Permit #:
BISUB23-03461
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building/residential/al/alteration
2410 Fordham St, San Pablo, CA, 94806
2023-11-06
Alteration to existing residence roof vents and 1 hour fire rated eves on side of residence by new adu covered under separate permit
Valuation:
N/A
Permit #:
BIAL23-012955
Status:
final
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
Building/residential/r/adu-2nd unit
18 Alves Ln, Bay Point, CA, 94565
2023-12-08
New detached all electrical 999 sq ft adu with 83 sq ft open trellis *1.76 kw photovoltaic system required per title 24 report*
Valuation:
N/A
Permit #:
BIR23-014167
Status:
issued
Fee:
$20,247
Permit Type:
N/A
Building Type:
N/A
Residential building - addition
811 Arlington Ave, Emeryville, CA, 94608
2020-10-16
To legalize demolition and reconstruction and expansion of a two-story 2 499 square foot single-family residence note: the previous planning approval (pln17306) was for a two-story addition over an existing one-story residence. however the existing building was removed completely and requires a new planning permit for new construction. (the new building is under construction but has a... see more
Valuation:
$591,000
Permit #:
RB1705478
Status:
complete
Fee:
$24,413
Permit Type:
N/A
Building Type:
N/A
Electrical service panel change out
1515 Buckeye Ct, Pinole, CA, 94564
2025-04-30
Upgrade (e) 100amp subpnl w/(n) proposed 200amp subpnl
Valuation:
N/A
Permit #:
OTC24-0103
Status:
issued
Fee:
$307
Permit Type:
Subpanel
Building Type:
N/A
Residential reroof
2421 Park Estates Dr, Sacramento, CA, 95825
2023-12-29
In progress insp required; remove tar and gravel roofing and replace with torch-down membrane. 26.96 squares
Valuation:
$15,000
Permit #:
RRZR2023-02220
Status:
complete
Fee:
$457
Permit Type:
N/A
Building Type:
N/A
(sl) - sewer lateral (opw)
10746 Pearmain St, Oakland, CA, 94603
2018-08-27
Repair/replace building sewer on property only. sl & x required beyond pl. overflow device may be needed. if working within 25 feet of a monument you must comply with state law 8771 contact the inspector prior to starting excavation: minimum $5 800.00 fine for non-compliance. usa # and date must be provided in order to have a permit issued. permit valid for 90 days. call pwa inspectio... see more
Valuation:
N/A
Permit #:
SL1802284
Status:
final
Fee:
$476
Permit Type:
N/A
Building Type:
N/A
Residential building
1811 Elliott Dr, American Canyon, CA, 94503
2023-09-14
Code case: kitchen/(2) bathroom remodel & retrofit windows
Valuation:
$45,000
Permit #:
BP23-0597
Status:
final
Fee:
N/A
Permit Type:
Kitchen/bathroom re
Building Type:
N/A
Building/residential/r/adu-2nd unit
2410 Fordham St, San Pablo, CA, 94806
2023-11-06
Detached adu ----358sf 1/30/2024 revision to addition ca porch jcollignon/agradilla
Valuation:
N/A
Permit #:
BIR23-012957
Status:
final
Fee:
$3,278
Permit Type:
N/A
Building Type:
N/A
Residential building
156 James Rd, American Canyon, CA, 94503
2022-03-24
Remodel kitchen and 2 bathrooms
Valuation:
$25,000
Permit #:
BP22-0073
Status:
final
Fee:
N/A
Permit Type:
Kitchen/bathroom ...
Building Type:
N/A
Permit submittal
2410 Fordham St, San Pablo, CA, 94806
2023-07-12
Detached adu ----358sf
Valuation:
N/A
Permit #:
BISUB23-02304
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Combo permit
1566 140th Ave, San Leandro, CA, 94578
2018-06-19
Full interior remodel - relocate kitchen relocate laundry room convert bedroom into family room convert dining room into master suite remodel hallway bathroom new full bathroom by family room new tankless water heater and new gas fireplace insert
Valuation:
$55,000
Permit #:
B18-1207
Status:
final
Fee:
$3,047
Permit Type:
N/A
Building Type:
N/A
Misc res
3965 Finch Dr, Antioch, CA, 94509
2021-05-18
No Description Available
Valuation:
$1,000
Permit #:
B2105-0120
Status:
issued
Fee:
$155
Permit Type:
N/A
Building Type:
N/A
Miscellaneous otc permit
510 Dowling Blvd, San Leandro, CA, 94577
2018-07-25
Remove wall dividing bathroom - fill in exterior door - replace two windows - new roll-in shower - relocate toilet --- revision - rewire house ---
Valuation:
$20,000
Permit #:
B18-1469
Status:
final
Fee:
$1,010
Permit Type:
N/A
Building Type:
N/A