Updated: Sep 24, 2025
Location and Projects
Address
21 HEUTERS LANE, Mill Valley, CA, 94941
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Mathau-roche Design Group Architect
Mathau-roche Design Group, 21 Heuters Ln, Mill Valley, CA (Owned by: Mathau Samuel Nelson Karioki) holds a Architect license and 1 other license according to the California license board.
Their BuildZoom score of 99 ranks in the top 15% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mathau-roche Design Group, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Mathau-roche Design Group Services
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Mathau-roche Design Group Contact Information
Phone Number: (415) 822-6767
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Address: 21 HEUTERS LANE, Mill Valley, CA 94941
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Mathau-roche Design Group Mill Valley
Quality
99
85th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mathau-roche Design Group has a BuildZoom score of 99, which places them above 85% of 336,931 contractors in California.
Activity
|
3 projects
|
2025 |
|
2 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Mathau-roche Design Group has worked on at least
6.0 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
|
$50k-$100k |
|
3 projects
|
$100k-$250k |
|
1 project
|
$500k-$1mil |
The typical size of their permits is approximately $147,500. This graph shows the distribution of these job values.
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 Mathau-roche Design Group
This is a sample of this contractor's permits. Click here to access their complete permit history.
The work involves construction of new adu (accessory dwelling unit) on the ground floor of an existing apartment structure building with open space
Valuation:
$190,000
Permit #:
202011209463
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Tenant improvement. in basement (file storage). no structural work. no change to path of travel. total area to be renovated of 524sf
Valuation:
$105,000
Permit #:
202305167895
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Renovation of extg kitchen living room bathrooms and kitchen cabinets floor sheet rock bathroom fixtures
Valuation:
$200,000
Permit #:
202303022962
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Legalization of lower level space including kitchen bathrm & bedroom. no change to exterior footprint nor path of travel. no structural work
Valuation:
$35,000
Permit #:
202110019652
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Legalization of playroom & bathroom construction w/out permit on lowerl evel of house. work is interior improvements with no changes to path of travel or existing or occupancy of the building
Valuation:
$40,000
Permit #:
202003066386
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Legalize full bathroom with plans and 2 extg bedrooms on 3rd floor
Valuation:
$90,000
Permit #:
201706280605
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
To obtain final inspection for work approved under app#200104116531 all work is complete. bathroom and kitchen remodel with no plans. per 1)200003245290. 2) 200002172163 3)20000128480
Valuation:
$1
Permit #:
201810011924
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Legalization of first floor into a bedroom storage and bathroom. there is no structural work to interior reno
Valuation:
$50,000
Permit #:
201908027776
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Mandatory soft story reofit per sfebc chapter 4d -engineering criteria apendix a-4. to comly with nov #201721153
Valuation:
$60,000
Permit #:
201910245432
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Addition for 2 (n) auto repair areas
Valuation:
$900,500
Permit #:
B2306-162
Status:
issued
Fee:
$28,810
Permit Type:
Alter-commercial
Building Type:
N/A
Kitchen remodel no structural work
Valuation:
$26,000
Permit #:
201804307774
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Bathroom renovation in kind replacement in same location on 2nd floor. no exterior work
Valuation:
$15,000
Permit #:
201806283241
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Kitchen remodel no structural work
Valuation:
$20,000
Permit #:
201805028028
Status:
suspended
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Removal of extg non functional solar panels and replacement of extg asphalt shingle roof at gym. no structural work. total area=2675 sq ft
Valuation:
$60,000
Permit #:
201910184918
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
09 - recreation b...
New deck @ rear yard
Valuation:
$25,000
Permit #:
201805169312
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Seismic retrofit for building b1 for interior work(6,064 sq.ft. area) with exterior work.
Valuation:
N/A
Permit #:
BLD2016-43265
Status:
Application Received
Fee:
$8
Permit Type:
N/A
Building Type:
N/A
Interior remodel involving kitchen, bathroom and laundry remodel. includes dry rot repairs to some areas.
Valuation:
$55,000
Permit #:
B2016-03654
Status:
Under Review
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacement of extg leaking roof
Valuation:
$140,000
Permit #:
202107235002
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
25 - tourist hote...
Scope of work: interior renovation of bedrooms bathrooms and kitchen with no structural work
Valuation:
$60,000
Permit #:
201612205436
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Improvement of unfinished lower level to include one bedroom bathroom & closet. new deck & bay window on upper level. total improvement area = 354 s.f
Valuation:
$80,000
Permit #:
201507141431
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
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Mathau-roche Design Group Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Mathau-roche Design Group License info
Verified License
| License # | C26345 |
| Status | Active |
| State | California |
| Type | Architect |
- BuildZoom verified this license was active as of July 2025.
Verify this license's status for Mathau-roche Design Group at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | C21576 |
| Status | Active |
| State | California |
| Type | Architect |
- BuildZoom verified this license was active as of July 2025.
Verify this license's status for Mathau-roche Design Group at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
99
BuildZoom Score
27
Permits
- Building permit records show that Mathau-roche Design Group has worked on 27 permitted projects.
Mathau-roche Design Group Employees
MK
Mathau Samuel Nelson Karioki
Owner