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Gilbert O'sullivan Construction

Active License

About the contractor

Gilbert O'sullivan Construction operates out of Burlingame, CA and holds a General Building Contractor license according to the California contractors license board.

We were able to verify 8 building permits associated with Gilbert O'sullivan Construction. Check out their permit history below to see where they have worked and what type of work they have done in the past. Please note that this is not a comprehensive list of every project they have completed; just the projects we have been able to verify with the local permit authority.

Gilbert O'sullivan Construction has a BuildZoom score of 94 and is rated in the top 30% of 336,931 contractors in California.

Their license (803045) was verified as active when we last checked. If you are considering hiring Gilbert O'sullivan Construction, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.


Contact Info

709 Bayswater Avenue, Burlingame, CA 94010 Edit
(650) 630-0411 Edit

Key Statistics


Gilbert O'sullivan Construction has a BuildZoom score of 94, which places them above 70% of 336,931 contractors in California; license (803045) verified as active.
Pro tip: We generally recommend hiring a contractor with a score higher than 95.
(70 percentile)
2 projects
4 projects
1 project
1 project


Based on permit records, we have been able to verify that Gilbert O'sullivan Construction has worked on 8 projects over the past 5 years. They have received repeat business from 1 client, which is a strong indicator of reliability.


Here is a pricing breakdown based on the permit records we were able to obtain for Gilbert O'sullivan Construction. The median size of their projects is approximately $6,700.
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.
Note: Pricing is not available for all projects.
< $5k
1 project
2 projects
1 project
1 project
1 project

Building Permits Filed by Gilbert O'sullivan Construction

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February 19, 2015 - 3830 Divisadero St, San Francisco, CA

Change 2 extg windows in apt 202. change 1 window and 1 door extg. install 6-0x6-8 french doors in apt 104. alteration to extg permit app#201407252210. n/a ordinance #155-13

Value: $1 | Type: Building permit | Permit #: 201502198759

February 19, 2015 - 3830 Divisadero St, San Francisco, CA

Unit #103: replace one window in extg bathroom on second floor. revision to app#201411121257. n/a ordinance #155-13

Value: $1 | Type: Building permit | Permit #: 201502198768

November 12, 2014 - 3830 Divisadero St, San Francisco, CA

Unit #103: interior remodel to reconfigure floor plan to add one bedroom in the unit. new finsihes add new full bathroom and remodel (e) bathroom. relocate kitchen per plan. comply with nov 201402751. maher n/a.

Value: $70,000 | Type: Building permit | Permit #: 201411121257

July 25, 2014 - 3830 Divisadero St, San Francisco, CA

Unit 104 & 202 remodel. remodel (e) 2 kitchens and (e) 2 bathrooms per plan. adding one new bathroom and lary room for both units per plan. maher n/a.

Value: $30,000 | Type: Building permit | Permit #: 201407252210

July 2, 2014 - 2230 Francisco St 102, San Francisco, CA

Unit #102: converting existing dining room into a bedroom by adding a door bathroom remodel- plumbing fixtures rearrangement and new bathroom finishes new washer/dryer in an existing closet (unit on 2nd story); maher n/a

Value: $11,000 | Type: Building permit | Permit #: 201407020346

June 27, 2014 - 2230 Francisco St, San Francisco, CA

Demo(e) wood floor & baseboard throughout unit & install new hardwood flooring approx. 600 sq. ft.

Value: $2,500 | Type: Building permit | Permit #: 201406279767

January 19, 2012 - 28 Sequoia Wy, San Francisco, CA

Change window to sliding door in master bedroom build small redwood landing. one outdoor light.

Value: $6,800 | Type: Building permit | Permit #: 201201192534

October 5, 2011 - 161 Ellsworth St, San Francisco, CA

Replace damaged deck boards add extra joists upgrade hardware to hot dipped galvanised. less than 50%

Value: $6,500 | Type: Building permit | Permit #: 201110056141

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North South Construction INC

San Bruno, CA
Description: B - general building contractor
License Number: 953017
Bond Amount: $12,500
Bonded: Yes
Recent Building Permit
Remodel (e) master bath & renovation to convert (e) closet to bathr... more

Remodel (e) master bath & renovation to convert (e) closet to bathroom including raising a portion of roof & adding 2 skylights.
View all of this contractor's building permits

Martin Paul Duggan Contracting

San Francisco, CA
Description: General contractor
License Number: 763148
Bond Amount: $12,500
Bonded: Yes
Recent Building Permit
Replace footings in basement 9 total.

Replace footings in basement 9 total.
View all of this contractor's building permits

Description: General building contractor, painting and decorating
License Number: 693139
Bond Amount: 100000
Bonded: Yes
Recent Building Permit
Remove 2x8 ceiling joists and reinforce 2x8 existing roof joists in... more

Remove 2x8 ceiling joists and reinforce 2x8 existing roof joists in living room.
View all of this contractor's building permits

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Key License Information

  • License Number: 803045
  • Status: Active
  • State: California
  • Type: General Building Contractor
  • Date Issued: 01/14/2002

  • Click here to compare Gilbert O'sullivan Construction to the highest rated general contractors in Burlingame.

    Click here to look up the license status of Gilbert O'sullivan Construction at the California Contractors State License Board.

  • Bonded Agent: American Contractors Indemnity Company
  • Bond Value: $12,500
  • Learn More
  • Gilbert O'sullivan Construction has completed multiple projects based on building permit records.

Employees of Gilbert O'sullivan Construction

default team member image
Gilbert John Osullivan
Sole Owner

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Here are some of the rules, regulations, and laws governing contractors in California

Does Gilbert O'sullivan Construction 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).

Gilbert O'sullivan Construction currently holds license 803045 (General Building 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 Gilbert O'sullivan Construction

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 Gilbert O'sullivan Construction

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 BuildZoom's contractor profile and file a complaint with the CSLB.

Gilbert O'sullivan Construction has a $12,500 bond with American Contractors Indemnity Company.

What else should I know before hiring Gilbert O'sullivan Construction

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

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