Updated: May 27, 2026
Location and Projects
Address
P.O. BOX 436, Mill Valley, CA, 94942
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TRANSBAY DESIGN BUILD Construction
TRANSBAY DESIGN BUILD LLC, Mill Vly, Po Box 436, Mill Valley, CA (Employees: Daniel Stephen Cuniberti and David Gerard Frain) 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 TRANSBAY DESIGN BUILD LLC, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
TRANSBAY DESIGN BUILD LLC Services
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TRANSBAY DESIGN BUILD LLC Contact Information
Phone Number: (510) 914-0034
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Address: P.O. BOX 436, Mill Valley, CA 94942
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TRANSBAY DESIGN BUILD LLC Mill Valley
Quality
89
30th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
TRANSBAY DESIGN BUILD LLC has a BuildZoom score of 89, which places them above 30% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
1 project
|
2024 |
Our building permit records indicate that TRANSBAY DESIGN BUILD LLC has worked on at least
3.0 projects over the past 2 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
|
2 projects
|
$5k-$20k |
|
1 project
|
$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.
Building Permits by TRANSBAY DESIGN BUILD LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Revision of pa# 202407156488: adding replacement of the front windows with like in kind marvin ultimate alum clad windows. original permit included replacement of door and window trim replacement of stucco and replacement of flashing at roofline repair of dryrot as needed. same size and configurat
Valuation:
$14,000
Permit #:
202409181061
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Replacement of (3) front facing windows like in kind. (e) windows are vinyl inserts that have failed. new windows to be fiberglass inserts with the same configuration (milgard ultra c650)
Valuation:
$9,000
Permit #:
202407227014
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Removal and replacement of all existing stucco on front facade. replacement of degraded window and door trim. replacement of flashing at roof line. repair dry rot as needed
Valuation:
$10,000
Permit #:
202407156488
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remodel of (e) bathroom including new tile tub toilet vanity. upgrade of plumbing and electrical to meet code. no structural changes
Valuation:
$25,000
Permit #:
202407156489
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Kitchen remodel convert laundry sink into bar sink relocate laundry (n) water heater and furnace replacement of 1 window and door at rear. removal of interior utility stairs to unfinished basement crawl-space area. relocate laundry from basement to 1/f pantry area
Valuation:
$62,000
Permit #:
201810163289
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remodel bathroom at 2nd floor convert (e) laundry to bathroom w (n) skylight at 2nd floor relocate (e) laundry to garage
Valuation:
$48,000
Permit #:
202006269215
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Fill in space under e porch space with new unconditioned storage space. new windows door units and siding to match existing at rear ease and norht walls. int remodel of 1st fl kitchen bathroom laundry 2nd fl bathroom 1 bedrooms and new wc
Valuation:
$150,000
Permit #:
201712156552
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remodel of (e) bathroom and kitchen. new plumbing fixtures new electrical fixtures and wiring. new kitchen appliances enlarge 1 door opening is non-bearing wall new insulation in opened walls & ceiling in new kitchen countertops & cabinets
Valuation:
$44,000
Permit #:
201711295007
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
2 front and 2 rear windows replacement - remove exiting single pane aluminum inserts from the front façade and replace with aluminum exterior clad wood windows.no change of (e) openings. max u-factor 0.32
Valuation:
$6,000
Permit #:
201711295038
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remodel 2 (e) bathrooms; rleocate closet on toplevel of building & remove wall to annex closet to bathroom
Valuation:
$50,000
Permit #:
201901160484
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Installation sequence plan to accommodate foundation excavation per prev approved permit 201712156552
Valuation:
$1
Permit #:
201802211835
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Rear yard addition of (n) 1-story master bed & bathroom. (n) interior connecting stair. renovate (e) kitchen & bathroom. remove (e) rear bay window & addition (n) sliding door in place. (n) laundry room at ground floor plumbing electrical lighting & hvac
Valuation:
$275,000
Permit #:
201810254156
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
The project includes a ground floor infill addition below a permitted rear yard deck(200508120219). new rooms to include a home office bathroom and family room. there will be a partial seismic upgrade plbmg and electrical in the area of work
Valuation:
$100,000
Permit #:
201609097344
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Rev. to pa#201609097344: it was discovered that the rear wall stucco was poorly installed and leaking. this applic. is ffor the removal of more stucco than originally anticipated and installation of wood siding.also replacement of damaged single glazed windows
Valuation:
$5,000
Permit #:
201707262951
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Front facade - remove vinyl siding replace w/wood. remove (e) windows replace w/wood double hung. remove (e) double doors @ entry replace w/single window. demolish (e) ramp stairs porch replace as drawn. remodel (e) master bathroom extension of (e) rear deck w/stair
Valuation:
$50,000
Permit #:
201507171782
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Third story addition consisting of 3 bedrooms 2 bathroom and a new interior stair. renovated kitchen & bathroom at 2nd story. new electrical hvac and plumbing. comply of maher ord 155-13 not req
Valuation:
$275,000
Permit #:
201311151972
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Voluntary upgrade of degraded foundation under new master bathroom under 201507171782. foundation work is perimeter of existing gr level storage room. ufer on electrical permit
Valuation:
$11,000
Permit #:
201512185493
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Reml lower level&stairs down.divides space to6 rms: bedroom, study, laundry room, hallway, bathrm, garage. +incidental closets&storage.remodel w/gypsum board&wood studs for walls.gypsum nailed to(e)flr joists for ceilings.replace support w/steel beam.leveled w/taped joists&sleepers attach to new plywood floor
Valuation:
$110,000
Permit #:
201203206421
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Top unit: addition 2 skylights. update sprinkler electrical mechanical. layout inknitting room. no change to exterior envelope
Valuation:
$22,000
Permit #:
201606018869
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Repair extg rear deck in kind within extg extents approx. 50 % as possible. elements remaining. not visible from street
Valuation:
$8,000
Permit #:
201312063582
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
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License # 1154343
Mill Valley, CA
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
TRANSBAY DESIGN BUILD LLC License info
Verified License
| License # | 778329 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Ltd Liability |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for TRANSBAY DESIGN BUILD LLC 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-F115058-1 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Ltd Liability |
- 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 TRANSBAY DESIGN BUILD LLC at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 981287 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Ltd Liability |
- 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 TRANSBAY DESIGN BUILD LLC at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1001702 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Ltd Liability |
- 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 TRANSBAY DESIGN BUILD LLC at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
89
BuildZoom Score
Insured
| Insurer | Trisura Insurance Company |
| Insured up to | $2,000,000 |
Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
17
Permits
- Building permit records show that TRANSBAY DESIGN BUILD LLC has worked on 17 permitted projects.
TRANSBAY DESIGN BUILD LLC Employees
DC
Daniel Stephen Cuniberti
Member
DF
David Gerard Frain
Rmm
There is Dan and there is David. This review is about David, sadly he is the principal owner and Contractor. Dan was amazing.
David is extremely unprofessional in his manners, work ethic, work quality and clean-up. Never once cleaned up after himself! Drywall, wood chippings, drywall mud (everywhere), and foot prints from boots.
Refused to honor request for mask wearing for indoor work , in our home with children, mid-pandemic. We repeatedly caught him with mask down in our home when he thought we weren't around/looking. Not only did he not wear boot covers, he couldn't even bother using the doormat.
Everything he installed had a problem "that wasn't his fault", it was "non-standard" or "poorly designed". Not at all true, or funny, since he is the one who recommended the items that we purchased.
Even now over a year later, brand new items he installed and/or fixed have problems, wasn't done proper to city code, or just plain doesn't work right.
I never leave reviews. I don't even have an online profile. But this needs to stop and contractors need to learn they can't get away with garbage quality work without anyone knowing how bad this company is .... because of David.