Updated: Jul 04, 2026
Location and Projects
Address
3670 MOUNTAIN RANCH RD, San Andreas, CA, 95249
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MAST PLUMBING
MAST PLUMBING, 3670 Mountain Ranch Rd, San Andreas, CA (Owned by: Delvin Lee Mast) holds a Plumbing license and 3 other licenses according to the California license board.
Their BuildZoom score of 100 ranks in the top 13% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring MAST PLUMBING, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
MAST PLUMBING Services
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MAST PLUMBING Contact Information
Phone Number: (209) 400-4396
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Address: 3670 MOUNTAIN RANCH RD, San Andreas, CA 95249
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MAST PLUMBING San Andreas
Quality
100
87th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
MAST PLUMBING has a BuildZoom score of 100, which places them above 87% of 336,931 contractors in California.
Activity
|
4 projects
|
2025 |
|
2 projects
|
2024 |
|
2 projects
|
2023 |
Our building permit records indicate that MAST PLUMBING has worked on at least
8.0 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
|
5 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that MAST PLUMBING mostly works on
plumbing project
projects.
Pricing
|
3 projects
|
< $5k |
|
1 project
|
$5k-$20k |
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.
R/r existing water heater with propane tankless
Valuation:
$3,000
Permit #:
B24-0370
Status:
final
Fee:
$138
Permit Type:
Water heater
Building Type:
N/A
R/r 40gal tanked wh
Valuation:
$1,150
Permit #:
B25-0246
Status:
final
Fee:
$138
Permit Type:
Water heater
Building Type:
N/A
Tank replacement (1500 gallon concrete)
Valuation:
N/A
Permit #:
OSW23-0217
Status:
final
Fee:
$270
Permit Type:
N/A
Building Type:
N/A
New electrical & plumbing suite c (the cupcake trolley)
Valuation:
$12,500
Permit #:
B22-1979
Status:
final
Fee:
$1,154
Permit Type:
N/A
Building Type:
N/A
Replace water heater
Valuation:
$1,200
Permit #:
B22-1613
Status:
final
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
Tank replacement (1060 poly)
Valuation:
N/A
Permit #:
OSW25-0015
Status:
final
Fee:
$278
Permit Type:
N/A
Building Type:
N/A
Adding two shampoo bowls (extension of existing plumbing)
Valuation:
$300
Permit #:
B21-1174
Status:
final
Fee:
$142
Permit Type:
Tenant improvement
Building Type:
N/A
Replacement water heater
Valuation:
$3,000
Permit #:
B21-2444
Status:
issued
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
R/r gas tankless water heater 11gal
Valuation:
$3,100
Permit #:
B24-0984
Status:
final
Fee:
$246
Permit Type:
Water heater
Building Type:
N/A
Water heater change out 40 gallon
Valuation:
$1,800
Permit #:
B21-1589
Status:
final
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
R/r 30 gal water heater
Valuation:
$1,000
Permit #:
B20-1695
Status:
final
Fee:
$142
Permit Type:
N/A
Building Type:
N/A
Water heater replacement
Valuation:
$3,600
Permit #:
B20-1116
Status:
final
Fee:
$142
Permit Type:
N/A
Building Type:
N/A
Water heater replacement
Valuation:
$2,800
Permit #:
RESOTC20-0016
Status:
final
Fee:
$142
Permit Type:
Water heater new ...
Building Type:
N/A
Profile holes - issued
Valuation:
N/A
Permit #:
OSW21-0382
Status:
final
Fee:
$1,052
Permit Type:
N/A
Building Type:
N/A
Gas line (from house to shop)
Valuation:
$600
Permit #:
B1801836
Status:
final
Fee:
$166
Permit Type:
Alterations
Building Type:
N/A
*replace piping from building to septic
Valuation:
$1,000
Permit #:
B1601548
Status:
final
Fee:
$260
Permit Type:
Addition
Building Type:
N/A
Water heater replacement
Valuation:
$2,000
Permit #:
RESOTC19-0207
Status:
final
Fee:
$142
Permit Type:
Water heater new ...
Building Type:
N/A
Water heater replacement
Valuation:
$1,000
Permit #:
B1401159
Status:
final
Fee:
$142
Permit Type:
Alterations
Building Type:
N/A
Install new gas on-demand water heater & new 6ft gas line
Valuation:
$2,000
Permit #:
BP2016-0004
Status:
ISSUED
Fee:
$77
Permit Type:
New
Building Type:
N/A
Propane
Valuation:
$500
Permit #:
B1401235
Status:
final
Fee:
$332
Permit Type:
Alterations
Building Type:
N/A
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Recent Buildzoom Projects
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Verified License
BuildZoom confirmed this contractor's license
MAST PLUMBING License info
Verified License
| License # | 1133882 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for MAST PLUMBING at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1117211 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for MAST PLUMBING at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1027861 |
| Status | Active |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for MAST PLUMBING at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 898400 |
| Status | Inactive |
| State | California |
| Type | Plumbing |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, 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 MAST PLUMBING at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
100
BuildZoom Score
Bonded
| Bonded Agent | Business Alliance Insurance Company |
| Bond Value | $15,000 |
23
Permits
- Building permit records show that MAST PLUMBING has worked on 23 permitted projects.
MAST PLUMBING Employees
DM
Delvin Lee Mast
Owner
DM
Duane Lee Mast
Qualify Partner
LM
Leslie Eugene Mast
General Partner
RM
Ryan Michael Mast
General Partner
Delvin and his guys were great to work with. He met with us gave us a price, completed the job on time and as quoted. Left the job site clean. Would recomend his company to anyone.
SteveD.