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T

BZ SCORE: 95

Verified License

San Bernardino, CA

Ty Underground

this is my business

BZ SCORE: 95

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Updated: Jun 17, 2026

Ty Underground

Ty Underground Inc, San, Po Box 3611, San Bernardino, CA (Employees: Cynthia Mc Mahon Young and Timothy Walter Young) holds a Pipeline license and 2 other licenses according to the California license board.

Their BuildZoom score of 95 ranks in the top 22% of 336,931 California licensed contractors.

Their license was verified as active when we last checked. If you are thinking of hiring Ty Underground Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.

Building Permits by Ty Underground Inc

Sort by: Notable Notable | Date Date | Job Value Job Value

This is a sample of this contractor's permits. Click here to access their complete permit history.

Utility excavation

16839 Ramona Ave, Fontana, CA, 92336

2021-11-19

Permit for dry utilities for sierra ave family housing

Valuation:

N/A

Permit #:

ELPT20-001391

Status:

final

Fee:

$287

Permit Type:

Excavation & traffic

Building Type:

N/A

Utility excavation

16839 Ramona Ave, Fontana, CA, 92336

2021-06-14

Permit for dry utilities for sierra ave family housing

Valuation:

N/A

Permit #:

ELPT20-001390

Status:

final

Fee:

$287

Permit Type:

Excavation & traffic

Building Type:

N/A

Utility excavation

16839 Ramona Ave, Fontana, CA, 92336

2021-10-05

Permit for dry utilities for sierra ave family housing

Valuation:

N/A

Permit #:

ELPT20-001389

Status:

final

Fee:

$249

Permit Type:

Excavation & traffic

Building Type:

N/A

Utility excavation

16839 Ramona Ave, Fontana, CA, 92336

2021-10-05

Permit for dry utilities for sierra ave family housing

Valuation:

N/A

Permit #:

ELPT20-001366

Status:

final

Fee:

$287

Permit Type:

Excavation & traffic

Building Type:

N/A

Offsite imp pmt

19956 Parcel Map, Fontana, CA

2022-06-16

Permit for construction of off-site public improvements on t

Valuation:

N/A

Permit #:

ELPT20-000252

Status:

final

Fee:

$4,699

Permit Type:

St & st lt & swr

Building Type:

N/A

Fire pc revision

19956 Parcel Map, Fontana, CA

2020-08-26

Revision to approved plan (paper)

Valuation:

N/A

Permit #:

FPCK20-000298

Status:

issued

Fee:

$199

Permit Type:

Revision

Building Type:

N/A

Excavation

7807 Juniper Ave, Fontana, CA, 92336

2015-06-02

Electrical phone and gas connections to new apartment comple

Valuation:

N/A

Permit #:

ELPT15-000381

Status:

issued

Fee:

$400

Permit Type:

Excavation & traffic

Building Type:

N/A

Building and safety commercial permits

600 Central Ave, Riverside, CA, 92507

2014-11-04

On-site sewer connection (canyon creek apartments)

Valuation:

$20,000

Permit #:

14-4868

Status:

final

Fee:

N/A

Permit Type:

Comb

Building Type:

N/A

Offsite imp pmt

7807 Juniper Ave, Fontana, CA, 92336

2015-02-05

Permit for off-site improvements in public right of way

Valuation:

N/A

Permit #:

ELPT15-000028

Status:

issued

Fee:

$341

Permit Type:

Sewer & storm drain

Building Type:

N/A

Traffic pc

7806 Sierra Ave, Fontana, CA, 92336

2012-03-13

No Description Available

Valuation:

$0

Permit #:

TPC12-000002

Status:

ISSUED

Fee:

N/A

Permit Type:

Traffic control

Building Type:

N/A

Traffic pmt

7806 Sierra Ave, Fontana, CA, 92336

2012-03-13

No Description Available

Valuation:

$0

Permit #:

TPT12-000059

Status:

FINALED

Fee:

N/A

Permit Type:

Traffic control

Building Type:

N/A

Offsite imp pmt

7806 Sierra Ave, Fontana, CA, 92336

2013-03-12

Permit for the construction of sewer improvements per

Valuation:

N/A

Permit #:

ELPT12-000010

Status:

final

Fee:

$526

Permit Type:

Sewer

Building Type:

N/A

Onsite

7806 Sierra Ave, Fontana, CA, 92336

2013-03-11

Onsite 13 appliances (revision)

Valuation:

N/A

Permit #:

FPMT12-000035

Status:

final

Fee:

N/A

Permit Type:

M-fam residential

Building Type:

N/A

Fire permit

19956 Parcel Map, Fontana, CA

2019-09-25

Onsite

Valuation:

N/A

Permit #:

FPCK19-000127

Status:

ready for payment

Fee:

$1,508

Permit Type:

New system

Building Type:

N/A

Onsite

7807 Juniper Ave, Fontana, CA, 92336

2015-01-14

Siena apartments

Valuation:

N/A

Permit #:

FPMT15-000022

Status:

issued

Fee:

N/A

Permit Type:

N/A

Building Type:

N/A

Fire permit

19956 Parcel Map, Fontana, CA

2021-09-29

Jamboree housing

Valuation:

N/A

Permit #:

FPMT19-001138

Status:

issued

Fee:

$82

Permit Type:

N/A

Building Type:

N/A

Recent Buildzoom Projects

Verified License

License #	779805
Status	Active
State	California
Type	Pipeline
Business Type	Corporation

BuildZoom verified this license was active as of June 2026.

Verify this license's status for Ty Underground Inc at the California Contractors State License Board.

This is a sample of licensing data; click here to access a complete history.

License Not Verified

Status	Active
City	Fontana
Type	Contractor
Business Type	Corporation

When BuildZoom last verified this license, it had an expiration date of June, 2018. Check the current license status of Ty Underground Inc with the The City of Fontana, CA

This is a sample of licensing data; click here to access a complete history.

Inactive License

License #	607446
Status	Inactive
State	California
Type	Pipeline
Business Type	Corporation

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 Ty Underground Inc at the California Contractors State License Board.

This is a sample of licensing data; click here to access a complete history.

95

BuildZoom Score

How the BuildZoom Score works

Bonded

Bonded Agent	Indemnity Company Of California
Bond Value	$15,000

Learn More

Insured

Workers Comp Provider

State Compensation Insurance Fund

Learn More

Follow this contractor

Before you Hire

Here are some rules, regulations, and laws governing general contractors in California:

Does Ty Underground Inc carry a valid contracting license?

In California, any remodeling or construction project that exceeds $500 (labor and materials), requires a contractor to have an active license with the California Contractor State License Board (CSLB).

Ty Underground Inc currently holds license 779805, 132, 607446 (Pipeline, Contractor), which was Active when we last checked.

How important is contractor licensing in California?

The CSLB is one of the highest rated licensing boards in the US. Applicants are required to pass a written board exam and prove at least four years of prior, relevant work experience. In addition, the CSLB requires all license holders to maintain at least $2,500 in operating capital and provides you with a range of other consumer protections.

Your liability risk when hiring Ty Underground Inc

Contractors in California are required to carry workers' compensation insurance if they have employees and proof of liability insurance with the cumulative limit of $1 million for licensees with five or fewer persons, and an additional 100,000 for each additional member over five, not to exceed $5 million total.

Financial recourse when hiring Ty Underground Inc

All licensed contractors in California are required to maintain a bond, which provides you with financial recourse in case they perform defective work or violate license regulations. If you feel as though you have been taken advantage of, you should leave feedback on the contractor's BuildZoom profile and file a complaint with the CSLB.

Ty Underground Inc has a $15,000 bond with Indemnity Company Of California.

What else should I know before hiring Ty Underground Inc

California contractors are required to submit their fingerprints to the board, which are then checked against criminal records held by the California Department of Justice (DOJ) and Federal Bureau of Investigation (FBI) prior to obtaining a valid contracting license.

How is the BuildZoom score calculated?

The BuildZoom score is based on a number of factors including the contractor's license status, insurance status, verified work history, standing with local consumer interest groups, verified reviews from other BuildZoom users and self-reported feedback from the contractor.

Why you should hire through BuildZoom

When it comes to major construction work or even minor alterations to your home, hiring the wrong contractor could result in incomplete or defective work. You may even find yourself dealing with huge liability claims. BuildZoom does the homework for you and helps you hire the right contractor.

You should get several bids before hiring a contractor

The California State License Board recommends getting at least three written bids before hiring a contractor. Do not automatically accept the lowest bid - an abnormally low bid may indicate the contractor made a mistake and is not including the same work quoted by their competitors. We've made the bid collection process extremely simple (and free). Just click here to get started.

The best way to use BuildZoom is to let us recommend contractors for your remodeling projects.

Homeowners who hire through BuildZoom's free bidding system report high rates of satisfaction, and homeowners who research contractors online are twice as likely to be happy at the end of their project.

If you hire a contractor through BuildZoom, that contractor is accountable to us. We can enforce standards of behavior, mediate disputes, and guarantee satisfaction.

Read more about why hiring through BuildZoom is so effective.

BuildZoom’s database now contains every licensed contractor across the U.S. - over 2.5 million of them... Categorized contractor profiles are enriched using government data from state licensing boards, Better Business Bureau ratings, and more… BuildZoom jumped into the fray by announcing that it raised $10.6 million in a round led by Formation 8. ...the Y combinator-backed startup said it will be focused on remodeling projects, where the median budget is around $19,000… A new index compiled by BuildZoom — which identifies contractors for projects — found that renovations are running 2.8 percent above their 2005 level…

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