Updated: May 21, 2026
Location and Projects
Address
1682 BAIO LANE, Concord, CA, 94521
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GH Construction
GH Construction, 1682 Baio Ln, Concord, CA (Owned by: Christian Gunner Hillner) holds a General Building license and 3 other licenses according to the California license board.
Their BuildZoom score of 96 ranks in the top 20% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring GH Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
GH Construction Services
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GH Construction Contact Information
Phone Number: (925) 787-7197
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Address: 1682 BAIO LANE, Concord, CA 94521
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GH Construction Concord
Quality
96
80th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
GH Construction has a BuildZoom score of 96, which places them above 80% of 336,931 contractors in California.
Activity
|
1 project
|
2024 |
Our building permit records indicate that GH Construction has worked on at least
1.0 project over the past 2 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
1 project
|
$20k-$50k |
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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
New 60'-4 x 50'-6 two-story single family dwelling with attached 2-car garage 17 x 5'-0 occupied roof deck at front 21 x 5 occupied roof deck at rear and 18'-6 x 5'-0 occupied roof deck at front. building shall by equipped with automatic fire sprinkler system per nfpa 13d
Valuation:
$576,412
Permit #:
19010-20000-03046
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Unit 106 post fire repair to damaged roof and drywall: firefighters cut a vent hole in the roof for ventilation. they cut through the sheathing and in doing so they cut with the chainsaw a total of 3 rafters. two rafters are approximately 50% cut and one 15-20% cut. the roof sheathing must be removed so that the two rafters that were badly damaged can be replaced from above in their o... see more
Valuation:
$3,500
Permit #:
COMP-10-22-0239
Status:
issued
Fee:
N/A
Permit Type:
Plck: repair
Building Type:
N/A
Addition 223 sf to rear of (e) 362 sf accessory structure and convert to 585 sf adu; convert (e) 370.5 sf detached garage to a covered patio for adu
Valuation:
$40,000
Permit #:
BS2109681
Status:
certificate of occupancy
Fee:
N/A
Permit Type:
New construction
Building Type:
2nd dwelling unit
New 60'-4 x 50'-6 two-story single family dwelling with attached 2-car garage 17 x 5'-0 occupied roof deck at front 21 x 5 occupied roof deck at rear and 18'-6 x 5'-0 occupied roof deck at front. building shall by equipped with automatic fire sprinkler system per nfpa 13d
Valuation:
$576,412
Permit #:
19010-20000-03046
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Demolish (e) 1580 sf single family residence
Valuation:
$8,000
Permit #:
BS2200181
Status:
final
Fee:
N/A
Permit Type:
Demolition
Building Type:
Single-family res...
400 amp main panel
Valuation:
$8,000
Permit #:
BS2210732
Status:
issued
Fee:
N/A
Permit Type:
New construction
Building Type:
Single-family res...
Demolish unpermitted structures on property and
Valuation:
$13,650
Permit #:
D18-0003
Status:
final
Fee:
$438
Permit Type:
R-code
Building Type:
N/A
2950 sq.ft. garage/workshop. mezzanine upper floor 546 sq.ft. conditioned main floor 2352 sq.ft. include bathroom dirty room electrical plumbing & mechanical work included 12/12/2018 revision: install underground1000gl lp tank with 1in.x 190ft and underground 2500gl water tank with electrical pump. 7/22/19 added an additional 2500 gal water tank with pump permit is good for 4 inspecti... see more
Valuation:
$150,000
Permit #:
14000807
Status:
issued
Fee:
$5,018
Permit Type:
N/A
Building Type:
N/A
Grading for garage pad and site work. 1050 c.y of cut & 750 c.y. of fill. permit is good for two inspections. additional inspections are $136.28 each. final inspection required
Valuation:
$30,000
Permit #:
14000810
Status:
final
Fee:
$1,127
Permit Type:
N/A
Building Type:
N/A
200 lin.ft. retaining wall around garage and along new concrete access. permit is good for 3 inspections. additional inspections are $136.28 each. final inspection required
Valuation:
$20,000
Permit #:
14000809
Status:
final
Fee:
$830
Permit Type:
N/A
Building Type:
N/A
Propose (n) 30'x40 one story single family dwelling with two open parking spaces_ building shall be fully sprinkler through out with nfpa 13d
Valuation:
$121,000
Permit #:
14010-20000-03647
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Window change-out (same size type and location) for residential buildings. dual glazing labeled and certified by national fenestration rating council (nfrc) is required for doors and windows replaced in all residential buildings three stories or less per section 152(b) of title 24. no structural changes. valuation to be verified by the field inspector
Valuation:
N/A
Permit #:
10016-20000-19156
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Window change-out (same size type and location) for residential buildings. dual glazing labeled and certified by national fenestration rating council (nfrc) is required for doors and windows replaced in all residential buildings three stories or less per section 152(b) of title 24. no structural changes. valuation to be verified by the field inspector
Valuation:
N/A
Permit #:
10016-20000-19154
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Window change-out (same size type and location) for residential buildings. dual glazing labeled and certified by national fenestration rating council (nfrc) is required for doors and windows replaced in all residential buildings three stories or less per section 52(b) of title 24
Valuation:
N/A
Permit #:
10016-20000-21506
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Propose 10'-4"x9'-10 one story addition to front of (e) one story single family dwelling with two open parking spaces
Valuation:
$45,000
Permit #:
14014-20000-04986
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Septic modification: trenching 12 ft. setback removing leach line away from structure adding 80 lin. ft additional leach lines
Valuation:
$0
Permit #:
13000771
Status:
Open
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Change old 200 amp panel to a photovoltaic solar rated 200 amp main panel
Valuation:
N/A
Permit #:
BIE15-001690
Status:
final
Fee:
$132
Permit Type:
N/A
Building Type:
N/A
Replace main water line from meter to residence. addition exterior electrical for pre-fab fountain and install irrigation sprinkler system
Valuation:
N/A
Permit #:
BIMU12-002363
Status:
issued
Fee:
$263
Permit Type:
N/A
Building Type:
N/A
Light manufacturing including blending bottling and plastic manufacturing - mup is for incidental warehousing of products manufactured on site - products are only warehoused for 1 to 2 days then shipped out
Valuation:
$0
Permit #:
CUP10-054
Status:
APPROVED
Fee:
$2,461
Permit Type:
N/A
Building Type:
N/A
Changeout 40gl standard water heater to new tankless water heater. addition 30ft of additional pipe. install water pressure regulator this permit includes 1 inspections
Valuation:
$3,000
Permit #:
172310
Status:
final
Fee:
$276
Permit Type:
N/A
Building Type:
N/A
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GH Construction Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
GH Construction License info
Verified License
| License # | 912420 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for GH Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 861966 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for GH Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 771428 |
| Status | Active |
| State | California |
| Type | General Building, Electrical |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for GH Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 786059 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for GH Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
41
Permits
- Building permit records show that GH Construction has worked on 41 permitted projects.
GH Construction Employees
CH
Christian Gunner Hillner
Owner
GJ
George L Hague Jr
Sole Owner
GH
Gregory Mark Harrod
Owner
GH
Greydon John Hicks
Sole Owner