Updated: May 06, 2026
Location and Projects
Address
88 SYCAMORE AVE, Mill Valley, CA, 94941
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Greg Mantz Construction Architect
Greg Mantz Construction, 88 Sycamore Ave, Mill Valley, CA (Owned by: Mantz Matt Gregory) holds a Architect license and 1 other license according to the California license board.
Their BuildZoom score of 96 ranks in the top 20% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Greg Mantz Construction, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Greg Mantz Construction Services
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Greg Mantz Construction Contact Information
Phone Number: (707) 386-1176
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Address: 88 SYCAMORE AVE, Mill Valley, CA 94941
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Greg Mantz Construction Mill Valley
Quality
96
80th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Greg Mantz Construction has a BuildZoom score of 96, which places them above 80% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2024 |
Our building permit records indicate that Greg Mantz Construction has worked on at least
2.0 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
|
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 Greg Mantz Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
Roof mount 91.35kwdc solar w/1 ess on adu
Valuation:
$20,000
Permit #:
SOLR-25-0391
Status:
complete
Fee:
$501
Permit Type:
N/A
Building Type:
N/A
Interior connecton stairwell between 14th & 15th fl. to partition off non exit stairm no change to (e) or occupancy
Valuation:
$45,000
Permit #:
201910104104
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Replacing windows and siding
Valuation:
$21,701
Permit #:
24-06841
Status:
final
Fee:
$329
Permit Type:
Siding
Building Type:
N/A
Addition onto existing front deck and trellis with new deck
Valuation:
N/A
Permit #:
B-037056
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Grading. site improvements including site civil/mechanical utilities site electrical utilities; site work for modular building canopies & landscaping and attendant improvements beneath east loop
Valuation:
$1,600,000
Permit #:
200712211193
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
-
2nd floor: 32 lights 3 switches 30 receptacles 2 fartfans; other equipment: vacum pump cold water csolenoid x-ray pano - x-ray sterilizer nitrons manifold; service no. & size: 200 amp subpanel; expanding dental office to upstairs outlets switches equpment and lights
Valuation:
N/A
Permit #:
E20090625574
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Expansion of an existing dental office to upstairs. connect to upstairs via (e) stair. install (3) more operatories & one ada complying restroom
Valuation:
$96,000
Permit #:
200812098158
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
67 - clinics-medi...
Demolition of interior walls ceilings & finishes. all walls to be demolished are non-structural. (per ab- 017)
Valuation:
$50,000
Permit #:
201312103754
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
New cabinetry tops thru out - minor demolish in sterile area relocate existing electrical panel building out equipment closet
Valuation:
$27,000
Permit #:
0400000683
Status:
ISSUED
Fee:
N/A
Permit Type:
Bp-3 (3 wk
Building Type:
N/A
Suite #454: tenant improvement. for medical office building modification on non-structural partitions doors cabinets and finishes. n/a for the maher ordinance #155-13
Valuation:
$49,950
Permit #:
201403130624
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Permit value$25kmessage contractor tenant improvement, remove 3 non bearing and addition non bearing partition walls for dental office addition
Valuation:
N/A
Permit #:
B0404193
Status:
EXPIRED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Expanding and remodeling existing bar and updating bathrooms to handicap
Valuation:
N/A
Permit #:
BI323735
Status:
final
Fee:
$1,356
Permit Type:
N/A
Building Type:
N/A
Tjpa sign: primary directional/kiosk signs d-1 thru d-13. (see drawings attached to pa no. 200908044093)
Valuation:
$1
Permit #:
200908044097
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
-
Plumbing for dental office t.i.; two sinks
Valuation:
N/A
Permit #:
P0403122
Status:
FINAL
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Plumbing for dental office t.i.; two sinks
Valuation:
N/A
Permit #:
P0403122
Status:
final
Fee:
$124
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$76,600
Permit #:
03080179
Status:
final
Fee:
$1,766
Permit Type:
Residential
Building Type:
N/A
Electrical for dental office tenant improvement
Valuation:
N/A
Permit #:
E0403944
Status:
FINAL
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical for dental office tenant improvement
Valuation:
N/A
Permit #:
E0403944
Status:
final
Fee:
$124
Permit Type:
N/A
Building Type:
N/A
Termite repair/report #05-10275 (b)
Valuation:
N/A
Permit #:
TM04-0034
Status:
FINALED
Fee:
$54
Permit Type:
Rpr
Building Type:
N/A
2nd floor (3) operatory sinks (2) restrooms and air vacum lines to 3 operatories
Valuation:
N/A
Permit #:
PP20090625278
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Greg Mantz Construction License info
Verified License
| License # | C16751 |
| Status | Active |
| State | California |
| Type | Architect |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of July 2025.
Verify this license's status for Greg Mantz Construction at the California Architect License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 806693 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- 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 Greg Mantz Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $12,500 |
20
Permits
- Building permit records show that Greg Mantz Construction has worked on 20 permitted projects.
Greg Mantz Construction Employees
GM
Gregory Alan Mantz
Sole Owner
MG
Mantz Matt Gregory
Owner