Updated: Mar 23, 2026
Location and Projects
Address
508 Tamalpais Dr, Mill Valley, CA, 94941
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B. T . DESIGN BUILD Construction
B. T . DESIGN BUILD, 508 Tamalpais Dr, Mill Valley, CA (Owned by: Barry Joseph Thomas) holds a General Building license according to the California license board.
Their BuildZoom score of 97 ranks in the top 18% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring B. T . DESIGN BUILD, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
B. T . DESIGN BUILD Services
Start a project today:
Custom Home Build
New Home Construction
Medium Multi-Family New Con...
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Medium Multi-Family Remodel...
Other Residential Remodel
Office Renovation
Restaurant Renovation
Retail Renovation
Other Commercial Renovation
Roofing
Framing
Wood Fences
Backsplash and Countertops
Stonework
Tile Flooring
Other Stone and Tile
Drywall
Interior Plaster
Flatwork Concrete
Foundations
Other Concrete
Demolition
Paving, Driveways, and Side...
Excavation and Grading
Other Site Work
Garage Construction
Gutters and Flashing
Skylights
Sea Walls
Drafting
B. T . DESIGN BUILD Contact Information
Phone Number: (415) 264-8479
Address: 508 Tamalpais Dr, Mill Valley, CA 94941
This is a sample of this contractor's permits. Click here to access their complete permit history.
Exterior: remove and replace (e) pavement and landscaping install steel trellis structure (e) irrigation system & lighting to remain. maher n/a
Valuation:
$100,000
Permit #:
201902072323
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
#102 - interior renovation to an (e) retail space. demolish all (e) finishes dropped ceilings & select non-load bearing walls. per ab-017 for demolish only. n/a maher ordinance
Valuation:
$80,000
Permit #:
201712015269
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
Replace 3 front windows of lower condo (in-kind/wood). all work replacement in kind. max ufactro 32
Valuation:
$3,000
Permit #:
201908169001
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Revision to pa 2019-0207-2323 trellis drilled pier footings to spread footing foundations due to conflicting underground structures
Valuation:
$1
Permit #:
201904269108
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
G/f -interior renovation of an (e) retail space. (e) havac systems to remain
Valuation:
$179,400
Permit #:
201712146484
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
Comply with mandatory soft story retrofit program oer 2016 sfebc sec 4d and 2016 cebc appx a4. n/a for maher
Valuation:
$45,000
Permit #:
201807124403
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Unit #102: track lighting. ref app#201712146484
Valuation:
$20,000
Permit #:
201804025272
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
Addn'n of 193 sf for office
Valuation:
N/A
Permit #:
B1810-176
Status:
final
Fee:
$3,482
Permit Type:
Alter-sfd
Building Type:
N/A
Common area- soft story retrofit per sfbc chapter 34b 2012 iebc appendix a-4 replace portions of (e) foundation with (n) reinf. foundation addition shearwalls & holdowns
Valuation:
$120,000
Permit #:
201601046281
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Residential remodel
Valuation:
N/A
Permit #:
20160597
Status:
final
Fee:
$24,204
Permit Type:
N/A
Building Type:
N/A
Partial voluntary seismic retrofit including addition of shearwalls foundation bolting & underpinning at garage level
Valuation:
$5,000
Permit #:
201607263340
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Compliance w mandatory soft sotry retrofit progrma iebc 2012 app a4
Valuation:
$135,000
Permit #:
201608165097
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Dryrot repair replacement of e wood posts replace e footings and 32 high retaining wall. replace in kind
Valuation:
$30,000
Permit #:
201607061619
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Outdoor seating area with bar-b-que and fireplace
Valuation:
$150,000
Permit #:
201612306310
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Stregthening (e) foundation in southwest corner; maher na; block 0525/lots 052 through 067
Valuation:
$21,200
Permit #:
201703080939
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Bathroom remodel keep (e) footprint; new tile tub fixtures; enlarge master bathroom closet; built-in book cases
Valuation:
$30,000
Permit #:
201705227305
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Demolition: demolish existing tile floor misc. debris remove @ dining area. replace in kind. no structural work
Valuation:
$1,000
Permit #:
201202174414
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
05 - food/beverag...
Revision to pa 2017-0308-0939 change from drilled piers to hand dug piers
Valuation:
$1
Permit #:
201706028284
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
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Verified License
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B. T . DESIGN BUILD License info
Verified License
| License # | 705869 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for B. T . DESIGN BUILD at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
11
Permits
- Building permit records show that B. T . DESIGN BUILD has worked on 11 permitted projects.
B. T . DESIGN BUILD Employees
BT
Barry Joseph Thomas
Owner