Updated: Jul 13, 2026
Location and Projects
Address
1449 SOS DRIVE, Walnut Creek, CA, 94597
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Drainage Pros Landscape Contractor
Drainage Pros, 1449 Sos Dr, Walnut Creek, CA (Employee: Richard Charles Mariani) holds a Landscaping license 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 Drainage Pros, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Drainage Pros Contact Information
Phone Number: (925) 944-5263
Address: 1449 SOS DRIVE, Walnut Creek, CA 94597
Drainage Pros Reviews
5 out of 5 stars, based on
1
review
-
By Maggie D.July 6, 2022install french drain, drain, and sump pump$34,000
This is a sample of this contractor's permits. Click here to access their complete permit history.
Demolish pool and fill in with unengineered fill resubmittal#1-jaw-10/13/22-uploaded erosion control plans it is the permittee’s obligation and responsibility to ensure that all work associated with this permit complies with all current orders of the health officer of the county of san mateo related to the novel coronavirus disease 2019 (covid-19). ?the county of san mateo assumes no ... see more
Valuation:
N/A
Permit #:
BLD2022-00743
Status:
expired
Fee:
$716
Permit Type:
N/A
Building Type:
N/A
Install (2) 115 volt 20amp gfi outlets to power 2 sump pumps
Valuation:
N/A
Permit #:
EL25-00077
Status:
final
Fee:
$404
Permit Type:
Alteration/rewire
Building Type:
N/A
Enf2022-00084 new retaining wall - 96 ft
Valuation:
$60,000
Permit #:
B22-1475
Status:
final
Fee:
$3,267
Permit Type:
N/A
Building Type:
N/A
Install new driveway per approved plans per city standard if working within 25 feet of a monument you must comply with state law 8771 contact the inspector prior to starting excavation: minimum $5 800.00 fine for non-compliance comply with all terms of city of oakland public works standards street excavation rules revised march 2015 and city council ordinance no. 13300 c.m.s. five day... see more
Valuation:
N/A
Permit #:
CGS18186
Status:
applied
Fee:
$474
Permit Type:
N/A
Building Type:
N/A
Sump pump/plug
Valuation:
N/A
Permit #:
M161417
Status:
final
Fee:
$645
Permit Type:
N/A
Building Type:
N/A
Demolish existing swimming pool
Valuation:
N/A
Permit #:
2103-0021
Status:
final
Fee:
$101
Permit Type:
Misc
Building Type:
N/A
3/4 gas line & 1 fire pit & 2 sump pumps
Valuation:
$1,000
Permit #:
M151299
Status:
issued
Fee:
$634
Permit Type:
N/A
Building Type:
N/A
Install curb drain
Valuation:
N/A
Permit #:
PW12-0139
Status:
final
Fee:
$491
Permit Type:
Sidewalk driveway c
Building Type:
N/A
Retaining wall in rear yard w malibu low voltage lighting at ret wall
Valuation:
N/A
Permit #:
BI314681
Status:
final
Fee:
$289
Permit Type:
N/A
Building Type:
N/A
Drainage work
Valuation:
N/A
Permit #:
B2014-0224
Status:
final
Fee:
$868
Permit Type:
Alteration
Building Type:
N/A
Electrical for new sump pump
Valuation:
$500
Permit #:
BP10001593
Status:
final
Fee:
$231
Permit Type:
N/A
Building Type:
N/A
New gas line and electrical for bbq and spa
Valuation:
N/A
Permit #:
BI344176
Status:
final
Fee:
$218
Permit Type:
N/A
Building Type:
N/A
Sump pump w/elec (electrical incidental to job)
Valuation:
$700
Permit #:
BP02003556
Status:
final
Fee:
$70
Permit Type:
N/A
Building Type:
N/A
New elect. line for sum pump
Valuation:
N/A
Permit #:
BIE10-004344
Status:
final
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Electrical plumbing for sump pump
Valuation:
$0
Permit #:
BH99000929
Status:
Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Message contractor circuit/feeder switch for pump
Valuation:
N/A
Permit #:
RE1300306
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical hook up for sump pump
Valuation:
N/A
Permit #:
BIE0000233001
Status:
final
Fee:
$109
Permit Type:
N/A
Building Type:
N/A
Demolish inground pool
Valuation:
$4,000
Permit #:
BP01002521
Status:
canceled
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Deck
Valuation:
$6,000
Permit #:
BH91002582
Status:
Cofo
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Sump pump
Valuation:
$450
Permit #:
BP03001034
Status:
final
Fee:
$70
Permit Type:
N/A
Building Type:
N/A
Recent Buildzoom Projects
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Verified License
BuildZoom confirmed this contractor's license
Drainage Pros License info
Verified License
| License # | 512288 |
| Status | Active |
| State | California |
| Type | Landscaping |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Drainage Pros 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 | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Insurance Company Of The West |
20
Permits
- Building permit records show that Drainage Pros has worked on 20 permitted projects.
Drainage Pros Employees
RM
Richard Charles Mariani
Sole Owner
Don't be like us and wait until a hundred year storm hits in the middle of a drought and floods your garage. Take care of your drainage projects now.
Drainage Pros completed a French drain and sump pump project for us in January 2022. We knew when we bought the house last September that the house didn't have adequate drainage, but we thought we had some more time to figure it out before it would cause an issue. Enter Huge Storm, October 2022. Our garage started to flood because there wasn't adequate drainage and our crawlspace filled up with water. While my husband was outside soaked to the bone (picture Jack on the door with Rose in the middle of the Atlantic, it was sad) trying to finagle a Home Depot plastic drain solution to save our belongings, I called Drainage Pros. Unfortunately I wasn't the only one with this idea and the earliest appointment I could get was for January.
Jonathan was assigned as our project manager and did the first assessment of our project. He was super professional and easy to talk with to plan our project. It was easy to get a hold of him throughout the project and ask questions as needed.
Our job consisted of installing a French drain around our entire house, and a drain that connected our downspouts. It also involved tunneling under our concrete walkway in the front and replacing some concrete. It also involved installing a surface drain along the front of our garage and connecting that to the system. Based on our site elevation we also had to install a sump pump and discharge line to the street. I'm a civil engineer and I've taken on some home projects, but this was probably one of the biggest ones we've had to do so far. Lots of dirt moving, big holes, concrete work, electrical. They had to take apart part of our back deck to access the back side of the house and they put it back together sufficiently.
Our foreman was Javier, and we really enjoyed working with him as well. He was super professional and new what was what. The whole crew worked REALLY hard, and did an excellent job. I was pretty nosy and took pictures the whole way and they were very accommodating to me. We also have animals and kids, and they were accommodating to them as well. They were good about covering holes and ensuring safety when they were off-site. The project was supposed to take three weeks and they got it done in two. I really can't say enough good things about our experience with Drainage Pros. They did a great job. I would absolutely hire them again based on our experience. The owner, Richard, came out and did his own inspection after the project was done. He was a delightful guy to talk to.
And lastly I'll note that this crew left our house/yard/property in better shape than they found it. They put rock and sand back where it was supposed to go and even made us a nice walkway with some existing brick we had. Very happy with this project.