Updated: Feb 05, 2026
Location and Projects
Address
5020 HESSEL RD, Sebastopol, CA, 95472
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Siers Construction
Based in Sebastopol, Siers Construction has served Sonoma County and surrounding areas for over two decades. The company specializes in custom home building and residential remodeling, offering services ranging from full home renovations to kitchen and bathroom upgrades. Siers Construction works with homeowners throughout the Sebastopol region, providing guidance from the initial project planning stages through to final construction. Their portfolio includes both new construction and remodels that emphasize structural integrity and tailored finishes suited to the character of the local area. Siers Construction coordinates all phases of the building process, working closely with clients and local subcontractors to ensure projects stay on schedule and meet project specifications. The firm’s long-standing presence in Sebastopol reflects its focus on residential construction tailored to the needs of the greater Sonoma County community.
Siers Construction Services
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Siers Construction Contact Information
Phone Number: (408) 569-9882
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Address: 5020 HESSEL RD, Sebastopol, CA 95472
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Siers Construction Sebastopol
Quality
96
80th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Siers 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 Siers 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
|
$50k-$100k |
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.
Remodel master & 2nd floor bathoom & addition new bathroom to
Valuation:
$80,000
Permit #:
B2024-1556
Status:
issued
Fee:
$4,139
Permit Type:
Residential
Building Type:
N/A
160 s.f. addition to include two new bathrooms. remove (e) wall in kitchen. update (e) mechanical & electrical. replace windows in master bedroom replace east side window with slider in master bedroom. building new landing & stairs at new slider door in master bedroom
Valuation:
$80,000
Permit #:
BLDG-17-1504
Status:
complete
Fee:
$4,309
Permit Type:
N/A
Building Type:
N/A
Remove inground pool and fill install concrete slab
Valuation:
$11,500
Permit #:
B2019-1279
Status:
final
Fee:
$615
Permit Type:
Residential
Building Type:
N/A
Tear off resheath and reroof with metal class a roof. 25 squares. pre-code chicken coop
Valuation:
N/A
Permit #:
BLD15-5842
Status:
final
Fee:
$481
Permit Type:
N/A
Building Type:
N/A
1) repipe of single family residence. 2) r&r furnace in original location. 3) 4 in dining room 2 in hallway. 4) electrical services upgrade to 200 amps. 5) 2 bathroom remodels (subtrades only). upstairs bathrooms. 6) kitchen remodel (subtrades only) cabinets new sink lighting
Valuation:
N/A
Permit #:
2010 007178 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Addition loft area over dining room
Valuation:
$9,000
Permit #:
BLDG-17-0429
Status:
complete
Fee:
$542
Permit Type:
N/A
Building Type:
N/A
Addition remodel
Valuation:
$310,150
Permit #:
08-1082
Status:
final
Fee:
$9,204
Permit Type:
Residential
Building Type:
N/A
Panel upgreade new counters & appliances (m e p) final inspection never rescheduled permit expired 8/6/09
Valuation:
N/A
Permit #:
09010034
Status:
final
Fee:
$401
Permit Type:
N/A
Building Type:
N/A
Kitchen & bathroom remodels r/r kitchen window move furnace into garage two skylights
Valuation:
$32,250
Permit #:
2008 015195 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
1.) copper repipe 2.) new water heater 3.) install 2 dedicated circuits and electrical upgrade
Valuation:
N/A
Permit #:
2010 012072 MF
Status:
final
Fee:
N/A
Permit Type:
Apt/condo/townhouse
Building Type:
N/A
Overlay siding on single family dwelling
Valuation:
N/A
Permit #:
BLD19-3613
Status:
final
Fee:
$440
Permit Type:
N/A
Building Type:
N/A
Residential remodel
Valuation:
$50,000
Permit #:
07-0269
Status:
final
Fee:
$1,823
Permit Type:
Residential
Building Type:
N/A
Replace (2) skylight with skylight in existing framing in bathroom
Valuation:
$5,240
Permit #:
2010 010683 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Addition 10 incandes 1 fixture 3 switches 6 receptacles
Valuation:
N/A
Permit #:
RE0403356
Status:
final
Fee:
$124
Permit Type:
N/A
Building Type:
N/A
Remodel 70 sq ft to bathroom skylight 2x2 non-opp
Valuation:
N/A
Permit #:
10010047
Status:
final
Fee:
$614
Permit Type:
N/A
Building Type:
N/A
1-story single family residence. building 404 sf attached garage
Valuation:
$9,947
Permit #:
2006 009080 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Electrical for adding 250 square feet in front 1 level enclosing porch etc meets setbacks for house per engineered plans
Valuation:
N/A
Permit #:
RE1500287
Status:
expired
Fee:
$163
Permit Type:
N/A
Building Type:
N/A
Plumbing for adding 250 square feet in front 1 level enclosing porch etc meets setbacks for house per engineered plans
Valuation:
N/A
Permit #:
RP1500218
Status:
expired
Fee:
$163
Permit Type:
N/A
Building Type:
N/A
Adding 250 square feet in front 1 level enclosing porch etc meets setbacks for house per engineered plans
Valuation:
$40,000
Permit #:
RB1400450
Status:
expired
Fee:
$2,057
Permit Type:
N/A
Building Type:
N/A
Mechanical for adding 250 square feet in front 1 level enclosing porch etc meets setbacks for house per engineered plans
Valuation:
N/A
Permit #:
RM1400492
Status:
expired
Fee:
$163
Permit Type:
N/A
Building Type:
N/A
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Siers Construction License info
Verified License
| License # | 830470 |
| Status | Active |
| State | California |
| Type | General Building, Window Coverings |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Siers 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 | Suretec Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
16
Permits
- Building permit records show that Siers Construction has worked on 16 permitted projects.
Siers Construction Employees
JJ
James Robert Siers Jr
Sole Owner