Updated: Jun 04, 2026
Location and Projects
Address
14 STATE ST #3, San Mateo, CA, 94401
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Demartini Construction
Demartini Construction, 14 State St, San Mateo, CA (Owned by: John William De Martini) holds a General Building license and 3 other licenses according to the California license board.
Their BuildZoom score of 89 does not rank in the top 50% of California contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Demartini Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Demartini Construction Services
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Demartini Construction Contact Information
Phone Number: (530) 559-5583
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Address: 14 STATE ST #3, San Mateo, CA 94401
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Demartini Construction San Mateo
Quality
89
30th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Demartini Construction has a BuildZoom score of 89, which places them above 30% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
1 project
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Demartini Construction has worked on at least
4.0 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 |
|
2 projects
|
$20k-$50k |
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.
Demartini Construction Reviews
1 out of 5 stars, based on
1
review
-
By AnonymousApril 6, 2015Neighbor hired them to install a fenceBeware of Dimartini Construction
Building Permits by Demartini Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
Unit #625: remodel the guest bathroom and the master bathroom. we will replace all fixutures cabinets & tile. we will not move or update rough electrical or move plumbing locations. no doors or windows will be changed or moved
Valuation:
$40,000
Permit #:
202504094012
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Remove drywall/reframe exterior wall for two new rough window openings at rear elevation. install 1/2 structural sheathing on interior of exterior wall frame. install two new windows at rear elevation/remove office drywall on interior/install new fire rated drywall on garage side of office wall
Valuation:
$21,000
Permit #:
202204152351
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remove drywall/reframe exterior wall for two new rough window openings. install 1/2 structural sheathing on interior of exterior wall frame. install two new windows/remove office drywall on interior/install new fire rated drywall on garage side of office wall
Valuation:
N/A
Permit #:
202204152350
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
-
Fire only work for the gibson dunn remodel on floor 25. additions are smoke detector 15 speakers 8 speaker/strobes and 3 strobes. ref 202305228292
Valuation:
$21,480
Permit #:
202310249287
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Unit 206: remodel one bathroom. no electrical/layout changes/moving door/no addition of window
Valuation:
$25,000
Permit #:
202309297729
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
#625: remodel kitchen in kind
Valuation:
$24,663
Permit #:
202507080312
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Commercial - with plan check - alteration or addition
2018-01-18
Karate studio: remove non- load bearing wall & move toilet & sink to make bathroom ada accessible for wheelchair. also relocate 10 gallon water heater
Valuation:
$6,500
Permit #:
17BLD-0573
Status:
final
Fee:
$378
Permit Type:
N/A
Building Type:
N/A
One kitche remodel- no change in configuration: no plug or plumbing: install new cabinets and counter sink and appliances will be installed in same location
Valuation:
$13,000
Permit #:
202106102102
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Deck permit to replace existing uncovered rear deck with new like for like 450 sq ft for an existing dwelling. permit is good for two inspections. additional inspections are $125.78 each. final inspection required
Valuation:
$12,000
Permit #:
12000100
Status:
complete
Fee:
$469
Permit Type:
N/A
Building Type:
N/A
Bathroom remodel: demolish 5 x 8 upper level hall bathroom. install all new fixtures & recessed lighting. fixtures installed in same locations however; water supply at tub changed to opposing wall
Valuation:
$10,200
Permit #:
BLD2012-01806
Status:
final
Fee:
$1,123
Permit Type:
N/A
Building Type:
N/A
Building/building/new building - r/single family dwelling
2007-01-04
New single family dwelling - highlands project model home #15 - 1088 sqft; this permit is for a model home only. no occupancy shall be granted until the final map improvement plans and all department approvals are recieved
Valuation:
$76,160
Permit #:
05BLD-0005
Status:
final
Fee:
$11,796
Permit Type:
N/A
Building Type:
N/A
Building/building/new building - r/single family dwelling
2007-07-11
New single family dwelling - highlands project model #14 - 960 sqft. this building is to be a model home only. no occupancy until final map recorded improvement plans are in place (dr02-36) and all departments approval
Valuation:
$67,200
Permit #:
05BLD-0002
Status:
final
Fee:
$11,752
Permit Type:
N/A
Building Type:
N/A
Residential - with plan check - alteration or addition
2016-12-02
Reduce size of bedroom and convert to laundry room. change door size and swing in closet and change to bifold door. install laundry tray and replace stacked washer and dryer with side by side. relocate plumbing and electrecal from existing laundry location to the proposed location
Valuation:
$10,000
Permit #:
16BLD-0524
Status:
final
Fee:
$434
Permit Type:
N/A
Building Type:
N/A
Remove all of the existing wood shingles on the front of the building. install new moisture barrier and metal flashing. install new cedar shingles
Valuation:
$23,000
Permit #:
201706018112
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
No Description Available
Valuation:
$0
Permit #:
06000026
Status:
Closed
Fee:
$802
Permit Type:
Alteration
Building Type:
Residential Building
To comply with his complaint #201171833 item #1: repair ground level section of existing three story staircase less than 50% in-kind repair work located at side of building not visible from street
Valuation:
$4,500
Permit #:
201201273013
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Building/building/new building - r/single family dwelling
2007-01-08
New single family dwelling - highlands project model home #15 - 1088 sqft; model home only - no occupancy until final map improvement plans dr02-36 conditions met and all departments approvals
Valuation:
$76,160
Permit #:
05BLD-0004
Status:
final
Fee:
$11,796
Permit Type:
N/A
Building Type:
N/A
Building/building/new building - r/single family dwelling
2004-12-30
New single family dwelling - highlands project model # 13 - 897 sqft; model home only - no occupancy until final map improvment plans dr02-36 conditions are met & all department approvals recieved
Valuation:
$62,790
Permit #:
04BLD-0325
Status:
applied
Fee:
$11,730
Permit Type:
N/A
Building Type:
N/A
Building/building/new building - r/single family dwelling
2007-01-08
New single family dwelling - highlands project model #13 - 897 sqft; model home only - no occupancy until final map improvement plans in place dr02-36 conditions met & all department approvals
Valuation:
$62,790
Permit #:
04BLD-0324
Status:
final
Fee:
$11,730
Permit Type:
N/A
Building Type:
N/A
Building/building/new building - r/single family dwelling
2007-07-11
New single family dwelling - highlands project model #14 - 960 sqft; model home only - no occupancy until final map improvement plans dr02-36 conditions and all department approvals
Valuation:
$67,200
Permit #:
05BLD-0001
Status:
final
Fee:
$11,752
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Demartini Construction License info
Verified License
| License # | 962715 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership, Partnership |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Demartini Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 752833 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership, Partnership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Demartini Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 780387 |
| Status | Inactive |
| State | California |
| Type | General Building, Landscaping |
| Business Type | Sole Ownership, Partnership |
- 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 Demartini Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-111382-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Sole Ownership, Partnership |
- According to the United States Environmental Protection Agency, 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 Demartini Construction at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
89
BuildZoom Score
Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
53
Permits
- Building permit records show that Demartini Construction has worked on 53 permitted projects.
Demartini Construction Employees
BM
Benjamin Paul De Martini
General Partner
DM
Daniel Jerome De Martini
Qualify Partner
JM
John William De Martini
Owner
MM
Matthew Jozef De Martini
Sole Owner
BEWARE WHEN DOING BUSINESS WITH DIMARTINI'S OF NEVADA CITY/GRASS VALLEY CA
The Dimartini family is a fairly prominent family in the Grass Valley/ Nevada City CA area, so I was shocked by an experience I had in dealing with them. Last summer, my next door neighbor hired Dan Dimartini’s construction company to install a fence in front of his house. In the process of digging post holes, he smashed the sewer line going from my house to the street. He was aware of the damage at the time, but made the erroneous assumption that it wasn’t an active sewer line, so he just filled the hole with concrete. When I called a plumber to figure out why my sewer was backing up, he discovered a total blockage where our line crossed a corner of the neighbor’s property line on its way out to the street. Dimartini didn’t bother to do any underground surveillance before he started digging. He admits it was his crew that caused the damage, but refused to pay for repairs. He claimed to have prayed and discussed it with his church brothers and they all agreed he shouldn’t be held responsible. How convenient. I wonder if that would work for me if I caused damage to his house to where he could no longer use his toilets. Just say a little pray about it and absolve yourself of all monetary responsibility. His complaint was that I didn’t give him an opportunity to do the repairs before I paid to have my plumber fix it. Sorry, but I needed a working sewer and didn’t have time to argue with him about it. Besides, why would I have the same guy that caused the damage, who is not a plumber, be the one to fix something as important as a sewer line? I should mention that he did offer to pay $100 toward the $1600 I had to pay to fix the damage he caused. He claimed he shouldn’t have to pay his “hard earned” money to fix it. So apparently his hard earned money is more valuable than mine? So be aware of what you are dealing with if you are considering hiring Dan Dimartini Contruction. If he damages any neighboring property, expect long hassles from your neighbors to get it resolved.