Updated: Jun 13, 2026
Location and Projects
Address
1042 LOIS AVENUE, Sunnyvale, CA, 94087
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Jansen Construction
Serving Sunnyvale and the surrounding Silicon Valley area, Jansen Construction brings 19 years of experience to residential and commercial projects. The company focuses on construction services that include remodels, renovations, and new builds. Jansen Construction’s portfolio highlights a range of work, from updating kitchens and bathrooms to undertaking larger-scale additions and structural improvements. The company works with both homeowners and business clients, tailoring project strategies to the needs of single-family residences, multi-unit properties, and local commercial spaces. Drawing on nearly two decades in the industry, Jansen Construction stays current with local building codes and standards in Sunnyvale and neighboring communities, providing tailored construction management for each project phase, from planning through completion.
Jansen Construction Services
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Jansen Construction Contact Information
Phone Number: (408) 332-0711
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Address: 1042 LOIS AVENUE, Sunnyvale, CA 94087
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Jansen Construction Sunnyvale
Quality
96
80th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Jansen Construction has a BuildZoom score of 96, which places them above 80% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2023 |
Our building permit records indicate that Jansen Construction has worked on at least
2.0 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.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
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.
19000-02826: revision to include removal of the south wall and install dropped beam. replace window like for like remove and replace kitchen cabinets update lighting and electrical (kitchen) relocate cook top from island to north wall and relocate oven to west wall. electrical service upgrade to 200 amps same location
Valuation:
N/A
Permit #:
20REV-00193
Status:
issued
Fee:
$233
Permit Type:
N/A
Building Type:
N/A
Remodel 2 bathrms (n) ceiling lighting & replace sub-panel
Valuation:
$20,000
Permit #:
BLD2021-00892
Status:
final
Fee:
$1,440
Permit Type:
Bathroom remodel
Building Type:
N/A
Remodel
Valuation:
N/A
Permit #:
BLD25-00443
Status:
issued
Fee:
$10,509
Permit Type:
Other
Building Type:
N/A
19000-02826: revision to remodel master bathroom replace two bathroom windows on 2nd floor replace (1) bedroom and (1) garage windows
Valuation:
$30,000
Permit #:
19REV-00896
Status:
issued
Fee:
$221
Permit Type:
N/A
Building Type:
N/A
19000-02826: revision to replace (e) furnace install (n) air conditioning and replace doors with windows. upgrade panel to 200 amp
Valuation:
N/A
Permit #:
20REV-00376
Status:
issued
Fee:
$708
Permit Type:
N/A
Building Type:
N/A
Cap off top of chimney cap off gas line. remove tile surroundings andhearths from 2 fire places. frame openings drywall trim base paint
Valuation:
$3,000
Permit #:
19000-02191
Status:
final
Fee:
$354
Permit Type:
N/A
Building Type:
N/A
Remove(e)unwarranted dwelling unit.remove rear portion of rear cottage stru.enlarge rear yard to 25'-physically merge(e)cottage stru&(e)main house to create 1 stru-build rear addition at grd, 1st&2/fl.add partial 3/fl.remove non-hist features at frt elevation.new driveway&curbcut.new garage dr openin
Valuation:
$549,968
Permit #:
201304235278
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Front building -remodel of extg s.f.d. remove extg interior structure partitions fixtures & finishes r/r rear wndws &doors.infill extg prop.line wndws. remove (e) unwarranted unit. new foundation. see app#201307031092 & eea of 2/3/13
Valuation:
$250,000
Permit #:
201307031088
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Rear unit only 553 a: replace and renew building foundations and slab. addition new retaining walls at rear. property line and both side property lines adjacent. backfill and brade at new retaining walls to create new rear yard landscape terrace
Valuation:
$30,000
Permit #:
201312134144
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Revision to pa #2013.0423.5278 - omit metal grating deck replace with waterproofed wood framing with roof - finishes sloping to (e) drain (n) wood deck finishes + 1-hr fire-rated parapet wall
Valuation:
$1,000
Permit #:
201505267175
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Remodel kitchen and laundry room like for like (203 sf) replace existing door to laundry room with pocket door
Valuation:
$57,034
Permit #:
16000-00583
Status:
final
Fee:
$2,729
Permit Type:
N/A
Building Type:
N/A
Front building - revision to appl #2013.07.03.1088: addition (n) concrete footing at west property-line addition (n) concrete retaining wall & paved terrace in yard between dwellings
Valuation:
$8,000
Permit #:
201402118331
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remodel bathroom change layout closet to become shower install new window
Valuation:
$38,000
Permit #:
19000-02437
Status:
final
Fee:
$921
Permit Type:
N/A
Building Type:
N/A
Bathroom rmdl remove nonbearing wall
Valuation:
N/A
Permit #:
B15-1992
Status:
final
Fee:
$376
Permit Type:
Alter/res
Building Type:
N/A
Demolish (e) wall and fireplace to create pass through btwn living room and dining room
Valuation:
N/A
Permit #:
2015-4086
Status:
final
Fee:
N/A
Permit Type:
Others
Building Type:
N/A
Residential interior remodel bathroom #2 (45 sf) and install new skylight in the master bathroom
Valuation:
$24,000
Permit #:
19000-02826
Status:
final
Fee:
$673
Permit Type:
N/A
Building Type:
N/A
Ktichen remodel (see notes)
Valuation:
N/A
Permit #:
B15-2158
Status:
final
Fee:
$786
Permit Type:
Alter/res
Building Type:
N/A
Addition 366 sf 1st floor & 1100 sf 2nd floor
Valuation:
N/A
Permit #:
BLD2016-00516
Status:
final
Fee:
$21,907
Permit Type:
Residence reconst...
Building Type:
N/A
Upper & lower
Valuation:
N/A
Permit #:
SEW2018-00095
Status:
final
Fee:
$483
Permit Type:
Upper & lower
Building Type:
N/A
Deck repair
Valuation:
N/A
Permit #:
BLDG2014-0049
Status:
final
Fee:
$978
Permit Type:
Other
Building Type:
N/A
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Jansen Construction Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Jansen Construction License info
Verified License
| License # | 735733 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Jansen 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 # | NAT-119283-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Sole Ownership |
- According to the United States Environmental Protection Agency, 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 Jansen Construction at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
14
Permits
- Building permit records show that Jansen Construction has worked on 14 permitted projects.
Jansen Construction Employees
WJ
Wilhelmus Jansen Jr
Sole Owner