Updated: Jan 30, 2026
Location and Projects
Address
229 SYLVIA DRIVE, Glen Ellen, CA, 95442
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Passivworks Construction
Based in Sonoma County’s wine country, Passivworks Inc. specializes in sustainable construction and renovation for residential clients throughout Northern California. Founded and led by Rick Milburn, the firm draws on over two decades of experience building high-performance homes and executing custom remodels, including kitchen renovations and Passive House projects. Passivworks emphasizes sustainable building practices by sourcing 90% of materials from within the United States and ensuring all labor is provided by qualified local professionals. Every project prioritizes the use of non-toxic materials and products, reflecting the company's commitment to environmental responsibility. The team focuses on delivering eco-friendly solutions, whether for new custom builds or renovation work, and is known for its collaborative approach that combines design integration with efficient execution.
Passivworks Inc Services
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Passivworks Inc Contact Information
Phone Number: (707) 975-6912
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Address: 229 SYLVIA DRIVE, Glen Ellen, CA 95442
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Passivworks Inc Glen Ellen
Quality
99
85th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Passivworks Inc has a BuildZoom score of 99, which places them above 85% of 336,931 contractors in California.
Activity
|
1 project
|
2023 |
Our building permit records indicate that Passivworks Inc has worked on at least
1.0 project 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
|
$500k-$1mil |
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.
2017 fire damage repair-repair damaged siding and weather resistive materials and remodel interior. convert 28 sq. ft. of conditioned space to a covered porch. revision #1. revised layouot for bedroom #1 revised entry approach design deck2) deck#1 converted to a screened porch. revision #2 - revised energy calcs. use mini split system rather than radiant heat and air conditioning
Valuation:
$585,000
Permit #:
BR22-00051-ALT
Status:
final
Fee:
$6,237
Permit Type:
N/A
Building Type:
N/A
Replace existing low deck on east side of house with revised deck shape new privacy screens and outdoor bbq area
Valuation:
N/A
Permit #:
BLD21-5177
Status:
final
Fee:
$1,332
Permit Type:
N/A
Building Type:
N/A
Fire damage rebuild: replacement garage
Valuation:
$149,000
Permit #:
B19-01316
Status:
final
Fee:
$4,246
Permit Type:
N/A
Building Type:
N/A
2017 complex fire evt17-05374 temporary trailer for reconstruction of fire damage residence
Valuation:
$0
Permit #:
TEM18-0132
Status:
Started
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remodel bathroom & entrance to bedroom update kit lighting addition tankless wtr heater replace great room slider
Valuation:
$20,000
Permit #:
B18-000167
Status:
complete
Fee:
N/A
Permit Type:
Single family dwe...
Building Type:
N/A
Temporary electric meter set 200 amp for well 2017 complex fire
Valuation:
$0
Permit #:
TEM18-0118
Status:
Issued
Fee:
$117
Permit Type:
N/A
Building Type:
Residential
Deck extension
Valuation:
$51,000
Permit #:
B21-000137
Status:
complete
Fee:
N/A
Permit Type:
Single family dwe...
Building Type:
N/A
Fire damage demo: retaining wall and slab
Valuation:
$1,000
Permit #:
B19-01319
Status:
final
Fee:
$303
Permit Type:
N/A
Building Type:
N/A
Remodel sfd...2/5/13 expand scope of work: replace 600 sq ft of siding on south west of sfd.replace wood burning fireplace with gas appliance- total lineal footage not to exceed 40 lin 4/24/13 addition addnl scope of work of 600 sq ft siding on the se wall and 5 piers for (e) deck 5/21/13 addition to scope of work 50 of electrical work to above southeast exterior wall additional sidin... see more
Valuation:
N/A
Permit #:
BLD12-5144
Status:
final
Fee:
$763
Permit Type:
N/A
Building Type:
N/A
Fire dwelling rebuild: main dwelling 4632sq (3656sq'conditioned) and attached garage with room above 770sq. revision #2: revised title 24 and calgreen
Valuation:
$1,000,000
Permit #:
B18-00702
Status:
final
Fee:
$19,199
Permit Type:
N/A
Building Type:
N/A
Main dwelling addition - demolish existing garage attached to main dwelling unit with breezway. replace with new garage and a new guest unit above garage attached to main unit with breezway. note: plan change added 118 sq ft of conditioned space to sitting room
Valuation:
$100,000
Permit #:
B08-01262
Status:
Finaled
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
2017 complex fire temp cargo container 160
Valuation:
$0
Permit #:
TEM18-0133
Status:
Pre-Issue
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
2017 complex fire temp cargo container 160
Valuation:
$0
Permit #:
TEM18-0134
Status:
Started
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
2017 complex fire temp cargo container 160
Valuation:
$0
Permit #:
TEM18-0135
Status:
Started
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Main dwelling alteration: kitchen bathroom and great room remodel resurfacing existing decks. change out windows and doors new furnace and water heater move air conditioning compressor alteration 6/21/17 - new siding w/rain screen new section of deck and valve repairs
Valuation:
$165,000
Permit #:
B16-01928
Status:
final
Fee:
$4,166
Permit Type:
N/A
Building Type:
N/A
New entry gate
Valuation:
$32,000
Permit #:
B16-01947
Status:
final
Fee:
$2,156
Permit Type:
N/A
Building Type:
N/A
This permit expired in plan review and was put in garage dry rot repair on main dwelling
Valuation:
$110,000
Permit #:
B07-00396
Status:
Expired Application
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$137,000
Permit #:
B05-00958
Status:
final
Fee:
$4,807
Permit Type:
N/A
Building Type:
N/A
Detached garage -- 8/29/12 temp occpy
Valuation:
N/A
Permit #:
BLD11-1098
Status:
final
Fee:
$2,834
Permit Type:
N/A
Building Type:
N/A
Replace gas and electric to pool - single family dwelling
Valuation:
N/A
Permit #:
BLD13-2036
Status:
final
Fee:
$152
Permit Type:
N/A
Building Type:
N/A
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Projects
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Passivworks Inc License info
Verified License
| License # | 803544 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Passivworks Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
99
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
17
Permits
- Building permit records show that Passivworks Inc has worked on 17 permitted projects.
Passivworks Inc Employees
RM
Richard Brian Milburn
Rmo / Ceo / Pres