Updated: Dec 18, 2025
Location and Projects
Address
369-B 3RD ST #521, San Rafael, CA, 94901
Use our bidding system to
request a quote
Healthy Building Science Construction
Based in San Rafael, Healthy Building Science Inc serves the greater San Francisco Bay Area with building inspection and consulting services focused on environmental health and safety. The company specializes in environmental testing for indoor air quality, mold, asbestos, lead, and water contaminants, working with both residential and commercial properties. Healthy Building Science Inc offers services such as healthy building assessments, materials screening, and building envelope investigations to help clients identify and mitigate potential environmental hazards. The team provides consulting for new construction as well as existing buildings, with an emphasis on green building practices and occupant wellness. Serving communities throughout the Bay Area—including Marin, San Francisco, and the East Bay—the firm applies industry-standard testing protocols and provides clear, actionable reports for property owners and managers.
Healthy Building Science Inc Services
Start a project today:
Healthy Building Science Inc Contact Information
Phone Number: (415) 785-7986
Edit
Address: 369-B 3RD ST #521, San Rafael, CA 94901
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
Healthy Building Science Inc San Rafael
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Healthy Building Science Inc has a BuildZoom score of 108, which places them above 95% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
1 project
|
2024 |
|
4 projects
|
2023 |
Our building permit records indicate that Healthy Building Science Inc has worked on at least
7.0 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
|
1 project
|
$5k-$20k |
|
1 project
|
$250k-$500k |
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.
Building Permits by Healthy Building Science Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
New single family 2-bedroom residence and carport. concrete wafflemat foundation; non-combustible faswall block exterior walls; wood-framed interior structure and roof framing; standing seam metal roofing; heat pump with radiant heat tubing in fl. slab; (e) approved septic system
Valuation:
N/A
Permit #:
BLD20-5601
Status:
final
Fee:
$34,740
Permit Type:
N/A
Building Type:
N/A
Remodel addition remove (e) porch & replace w (n) covered porch
Valuation:
$450,000
Permit #:
174572
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Residential - construct new concrete wall
Valuation:
N/A
Permit #:
REVAL-048884
Status:
final
Fee:
$4,285
Permit Type:
Residential
Building Type:
N/A
Sidind and trim replacement of north and east facade (backyard). prime and paint not visible from street. entire wall at north and east. replace/repair in kind
Valuation:
$60,000
Permit #:
202207017653
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Road closure (crane for retaining wall replacement)
Valuation:
N/A
Permit #:
DPW-047296
Status:
issued
Fee:
$4,611
Permit Type:
Road closure
Building Type:
N/A
Update existing kitchen replacing like with like
Valuation:
N/A
Permit #:
B2023-0176
Status:
final
Fee:
$2,178
Permit Type:
N/A
Building Type:
N/A
Residential – boiler installation
Valuation:
N/A
Permit #:
B-044728
Status:
final
Fee:
N/A
Permit Type:
Gas water heater ...
Building Type:
N/A
Residential - mastebath remodel + window change
Valuation:
$61,003
Permit #:
B-043869
Status:
final
Fee:
$3,490
Permit Type:
N/A
Building Type:
N/A
240 sf detached carport
Valuation:
N/A
Permit #:
BLD20-5621
Status:
final
Fee:
$1,005
Permit Type:
N/A
Building Type:
N/A
Run new dedicated gas line from meter to fireplace
Valuation:
N/A
Permit #:
P2021-0148
Status:
issued
Fee:
$159
Permit Type:
Residential
Building Type:
N/A
Kitchen remodel
Valuation:
N/A
Permit #:
B1911-080
Status:
final
Fee:
$1,768
Permit Type:
Alter-sfd
Building Type:
N/A
Emergency remodel due to water damage
Valuation:
N/A
Permit #:
B2023-0331
Status:
final
Fee:
$2,135
Permit Type:
N/A
Building Type:
N/A
Replacement of install furnace. remove & replace air supply + intake grills seal all boots to ducting - replace partial crushed duct. install new plenum + air filter bex
Valuation:
$14,205
Permit #:
202512182179
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
New condensate line
Valuation:
N/A
Permit #:
PP20251218484
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Furnace replacement
Valuation:
N/A
Permit #:
PM20251218486
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Similar Contractors See more
193
BZ Score
$200K
Avg Project
-
Projects
187
BZ Score
$30K
Avg Project
-
Projects
188
BZ Score
$30K
Avg Project
-
Projects
Healthy Building Science Inc Reviews
BuildZoom hasn't received any reviews for Healthy Building Science Inc. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Healthy Building Science Inc License info
Verified License
| License # | 1046058 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of December 2025.
Verify this license's status for Healthy Building Science Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
9
Permits
- Building permit records show that Healthy Building Science Inc has worked on 9 permitted projects.
Healthy Building Science Inc Employees
AS
Alexander Nachum Stadtner
Rmo / Ceo / Pres