Updated: Jan 01, 2026
Location and Projects
Address
742 Bradley Ave, Novato, CA, 94947
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Chan Drainage Plumber
turn your damp, dirty crawl space into a dry clean space you don't have to worry about, crawl spaces are notorious for following moisture into the structure of your home. this can cause host of problems including rot and mold. crawl space encapsulation aims to protect your home from this harmful moisture when crawl space encapsulation is done right , your home has a barrier which does not allow moisture in. the added insulation also increases your homes energy efficient.
From BuildZoom: Chan Drainage, 742 Bradley Ave, Novato, CA (Employee: Armando Chan May) holds a Synthetic Products license according to the California license board.
Their BuildZoom score of 115 ranks in the top 2% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Chan Drainage, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Chan Drainage Services
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Chan Drainage Contact Information
Phone Number: (415) 497-2517
Address: 742 Bradley Ave, Novato, CA 94947
Chan Drainage Novato
Quality
115
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Chan Drainage has a BuildZoom score of 115, which places them above 98% of 336,931 contractors in California.
Activity
|
3 projects
|
2025 |
|
6 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Chan Drainage has worked on at least
12.0 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.
Experience
|
11 projects
|
Plumbing projects |
|
3 projects
|
Sewer laterals |
Analyzing permits over the last 4 years shows that Chan Drainage mostly works on
plumbing project
and sewer lateral
projects.
Pricing
|
2 projects
|
< $5k |
|
2 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
|
2 projects
|
$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.
Two 3 dia pvc drain pipes under sidewalk thru curb
Valuation:
N/A
Permit #:
PW25-0033
Status:
final
Fee:
$451
Permit Type:
Concrete
Building Type:
N/A
Run drainage pipe under concrete
Valuation:
N/A
Permit #:
PW25-0051
Status:
final
Fee:
$451
Permit Type:
Concrete
Building Type:
N/A
Installation and replacement of existing french drain system daylight to existing sump pump system
Valuation:
N/A
Permit #:
PP20240923102
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install french drain at north side of structure. route piping to (e) catch basin
Valuation:
$8,000
Permit #:
202409201232
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Installation of 12 deep french drain system and connection of downspouts to rigid pipe
Valuation:
$5,000
Permit #:
B2022-0977
Status:
expired
Fee:
$221
Permit Type:
Residential
Building Type:
N/A
Installation of french drain. sewer lateral connection to existing cath basin
Valuation:
N/A
Permit #:
PP20240904720
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Share plans w 202408148610 for french drain project crosses property line
Valuation:
$1
Permit #:
202408148643
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
02 - church
Install loop from pressure water to gravity connection to sewer using uv resistand pvc pipes
Valuation:
N/A
Permit #:
PP20231031817
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
French drain and lateral connection installation of catch basin
Valuation:
N/A
Permit #:
PP20240904719
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential drainage improvement project. french drain. shared with pa #202408148643
Valuation:
$5,000
Permit #:
202408148610
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Residential- install foundation drain & sump pump system
Valuation:
$38,700
Permit #:
B-046040
Status:
final
Fee:
$942
Permit Type:
N/A
Building Type:
N/A
Drainage repairs install (n) french drain & pump
Valuation:
$15,220
Permit #:
BD24-1348
Status:
final
Fee:
$902
Permit Type:
Residence. Repair
Building Type:
N/A
Drainage/french drain replacement
Valuation:
$9,040
Permit #:
DPW-002020
Status:
issued
Fee:
$542
Permit Type:
Other
Building Type:
N/A
Encroachment - sidewalk sewer water monitoring wells misc
2023-06-26
Curb and gutter underpiping (under sidewalk curb drain jl)
Valuation:
N/A
Permit #:
PWEP-2023-0198
Status:
complete
Fee:
$362
Permit Type:
N/A
Building Type:
N/A
Installation of new french drain system
Valuation:
$54,700
Permit #:
B-047269
Status:
final
Fee:
$777
Permit Type:
N/A
Building Type:
N/A
French drain and moisture barrier
Valuation:
$51,580
Permit #:
P24-017
Status:
issued
Fee:
$1,644
Permit Type:
plumbing only
Building Type:
N/A
Sidewal underdrain
Valuation:
N/A
Permit #:
EN2023-0020
Status:
final
Fee:
$551
Permit Type:
S/w underdrain
Building Type:
N/A
Sidewalk underdrain
Valuation:
$1,800
Permit #:
EN2022-0203
Status:
final
Fee:
$413
Permit Type:
S/w underdrain
Building Type:
N/A
Run draiange under sidewalk to street curb
Valuation:
$450
Permit #:
EN2022-0085
Status:
final
Fee:
$265
Permit Type:
S/w underdrain
Building Type:
N/A
Side walk under piping
Valuation:
$3,000
Permit #:
DPW-046042
Status:
issued
Fee:
$180
Permit Type:
Other
Building Type:
N/A
Chan Drainage Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Chan Drainage License info
Verified License
| License # | 1007870 |
| Status | Active |
| State | California |
| Type | Synthetic Products |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of December 2025.
Verify this license's status for Chan Drainage at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
115
BuildZoom Score
Insured
| Insurer | Cumis Specialty Insurance Company Inc |
| Insured up to | $2,000,000 |
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Markel Insurance Company |
17
Permits
- Building permit records show that Chan Drainage has worked on 17 permitted projects.
Chan Drainage Employees
AM
Armando Chan May
Sole Owner