Updated: Jun 06, 2025
Location and Projects
Address
30 UPLAND AVENUE, Mill Valley, CA, 94941
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Castor Daniel Timothy Architect
Castor Daniel Timothy, 30 Upland Ave, Mill Valley, CA (Employee: Daniel Timothy Castor) holds a Architect license according to the California license board.
Their BuildZoom score of 103 ranks in the top 10% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Castor Daniel Timothy, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Castor Daniel Timothy Services
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Castor Daniel Timothy Contact Information
Phone Number: (415) 381-4478
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Address: 30 UPLAND AVENUE, Mill Valley, CA 94941
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Castor Daniel Timothy Mill Valley
Quality
103
90th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Castor Daniel Timothy has a BuildZoom score of 103, which places them above 90% of 336,931 contractors in California.
Activity
|
3 projects
|
2025 |
|
4 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Castor Daniel Timothy has worked on at least
8.0 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.
Experience
|
5 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that Castor Daniel Timothy mostly works on
home addition
projects.
Pricing
|
1 project
|
$250k-$500k |
|
1 project
|
$500k-$1mil |
|
2 projects
|
$1mil+ |
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 Castor Daniel Timothy
This is a sample of this contractor's permits. Click here to access their complete permit history.
Lower level remove (e) stairs. addition new stair up to main level. at main level remodel (e) sunroom kitchen & bathroom. at upper level remodel (e) bedrooms & bathrooms. relocate windows at north. relocate & addition new windows at west. new skylight. replace/repair siding & roofing in kind as required
Valuation:
$1,500,000
Permit #:
202407166594
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remodel & addition to existing single family residence
Valuation:
$750,000
Permit #:
B2411-013
Status:
issued
Fee:
$27,049
Permit Type:
Alter-sfd
Building Type:
N/A
Small addition int and extension remodel
Valuation:
$500,000
Permit #:
BR22-132
Status:
final
Fee:
$15,190
Permit Type:
Full construction
Building Type:
N/A
New 4, 428 sf building consisting of two accessory dwelling units over a parking garage on the same lot as the mixed use building at 13647 arnold drive. the two upper level residential units are 1, 112 sf each. the six car garage is 2, 204 sf with an additional four uncovered parking spaces on grade. also included are pre-fab decks and stairs at the residential units and concrete walk... see more
Valuation:
N/A
Permit #:
BLD20-8692
Status:
final
Fee:
$33,208
Permit Type:
N/A
Building Type:
N/A
Single family dwelling replace (e) sunroom with dining room and addition (305sf). remove and replace existing utility shed off existing kitchen. new windows doors siding and trim to match existing
Valuation:
N/A
Permit #:
BLD23-7842
Status:
final
Fee:
$3,505
Permit Type:
N/A
Building Type:
N/A
Single family dwelling replace (e) sunroom with (n) dining room and laundry. addition (n) bay window pop-out to (e) kitchen. replace (e) utility shed
Valuation:
N/A
Permit #:
BLD23-7842.R01
Status:
complete
Fee:
$186
Permit Type:
N/A
Building Type:
N/A
Remodel and addition
Valuation:
$800,000
Permit #:
CC19-020
Status:
final
Fee:
$22,059
Permit Type:
Construction and ...
Building Type:
N/A
Bryan w.- revision to consider building as non-separate occupancies per cbc 508.3. fire rated wall between unit 1 (restaurant) and unit 2 (retail) to be removed. space to be left open between units pending approval of modification from ehs. additional clarification of fire protection details are included
Valuation:
N/A
Permit #:
BLD19-4980.R01
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Revision to substitute board formed concrete for cmu walls and placement of evcs transformer within trash enclosure for mixed-use building
Valuation:
N/A
Permit #:
BLD20-0861.R01
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
E-submittal - trash enclosure for mixed use building -- 1/20/2021 revision to substitute board formed concrete for cmu walls and placement of evcs transformer within trash enclosure for mixed-use building
Valuation:
N/A
Permit #:
BLD20-0861
Status:
expired
Fee:
$2,191
Permit Type:
N/A
Building Type:
N/A
New detached 3-car garage main house basement renovation
Valuation:
$1,000,000
Permit #:
B2205-145
Status:
approved
Fee:
$28,211
Permit Type:
Alter-sfd
Building Type:
N/A
2017 complex fire - single family dwelling w/sprinklers 3012 sqft: decks 2851 sqft: patios 1991 sqft. evt17-04647
Valuation:
N/A
Permit #:
BLD19-0709
Status:
final
Fee:
$8,954
Permit Type:
N/A
Building Type:
N/A
Addition and remodel
Valuation:
$2,037,000
Permit #:
BR22-252
Status:
final
Fee:
$32,225
Permit Type:
Full construction
Building Type:
N/A
Alteration & addition
Valuation:
$350,000
Permit #:
B2212-040
Status:
expired
Fee:
$11,523
Permit Type:
Alter-sfd
Building Type:
N/A
Revision to 2017 complex fire - single family dwelling 2914 sqft; garage 480 sqft; 4/3.5 evt17-04259
Valuation:
N/A
Permit #:
BLD19-0518.R01
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential - remodel + addition to single family dwelling
Valuation:
N/A
Permit #:
B-044556
Status:
plancheck
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace rotting beam at sunroom with same
Valuation:
N/A
Permit #:
B-040339
Status:
final
Fee:
N/A
Permit Type:
Additions/remodels
Building Type:
N/A
New 1983 s.f. singly family residence and 244 s.f. garage
Valuation:
N/A
Permit #:
B-035805
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New single family residence
Valuation:
N/A
Permit #:
B-036019
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Cancelled - 335 sf addition to the north
Valuation:
N/A
Permit #:
B-036763
Status:
canceled
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Castor Daniel Timothy License info
Verified License
| License # | C31089 |
| Status | Active |
| State | California |
| Type | Architect |
- BuildZoom has not verified this license since May, 2025.
Verify this license's status for Castor Daniel Timothy at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
103
BuildZoom Score
28
Permits
- Building permit records show that Castor Daniel Timothy has worked on 28 permitted projects.
Castor Daniel Timothy Employees
CT
Castor Daniel Timothy
Owner
DC
Daniel Timothy Castor