Updated: Jun 23, 2026
Location and Projects
Address
663 HILL STREET, San Luis Obispo, CA, 93405
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Dettmer Architecture
Dettmer Architecture, 663 Hill St, San Luis Obispo, CA (Owned by: Randolph Craig Dettmer) holds a Architect license and 5 other licenses 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 Dettmer Architecture, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Dettmer Architecture Services
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Dettmer Architecture Contact Information
Phone Number: (805) 541-4864
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Address: 663 HILL STREET, San Luis Obispo, CA 93405
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Dettmer Architecture San Luis Obispo
Quality
97
82nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Dettmer Architecture has a BuildZoom score of 97, which places them above 82% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
Our building permit records indicate that Dettmer Architecture has worked on at least
1.0 project over the past year.
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
|
$5k-$20k |
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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
1st/f: installation of display monitors for databases. demolish walls
Valuation:
$10,000
Permit #:
202507301992
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
67 - clinics-medi...
Remove and replace ex. driveway
Valuation:
$0
Permit #:
1022750
Status:
Completed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Emra for sidewalk underdrain
Valuation:
$0
Permit #:
1022748
Status:
Issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Construct bathroom at exis preschool 92 sq ft
Valuation:
$5,353
Permit #:
K201003991
Status:
final
Fee:
$454
Permit Type:
N/A
Building Type:
N/A
Sfd/garage
Valuation:
N/A
Permit #:
BPH3630S
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Dettmer Architecture Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Dettmer Architecture License info
Verified License
| License # | C13827 |
| Status | Active |
| State | California |
| Type | Architect |
- BuildZoom verified this license was active as of July 2025.
Verify this license's status for Dettmer Architecture at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | ARC.00306381 |
| Status | Active |
| State | Colorado |
| Type | Architect |
- When BuildZoom last verified this license, it had an expiration date of October, 2017. Check the current license status of Dettmer Architecture with the Colorado Division of Professions and Occupations
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | ARC-306381 |
| Status | Active |
| State | Colorado |
| Type | Architect |
- When BuildZoom last verified this license, it had an expiration date of October, 2013. Check the current license status of Dettmer Architecture with the Colorado Division of Professions and Occupations
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 444728 |
| Status | Inactive |
| State | California |
| Type | General Building |
- 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 Dettmer Architecture at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 329393 |
| Status | Inactive |
| State | California |
| Type | General Building |
- 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 Dettmer Architecture at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 8390 |
| Status | Inactive |
| State | Washington |
| Type | Architect |
- According to the Washington State Business Licensing , 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 Dettmer Architecture at the Washington State Business Licensing .
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bonded Agent | Star Insurance Company |
| Bond Value | $7,500 |
Dettmer Architecture Employees
DC
Dettmer Randolph C
Owner
DC
Dettmer, Randolph Craig
Owner
RD
Randolph C. Dettmer
RD
Randolph Craig Dettmer
Owner