Updated: May 11, 2026
Location and Projects
Address
10000 WALTER WELSHER CT, Gilroy, CA, 95020
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Mark Nagel Building Construction
Serving Gilroy, California and surrounding communities, Mark Nagel Building brings 27 years of experience to residential construction and remodeling projects. The company specializes in home renovations, additions, and new construction for local homeowners. Mark Nagel oversees each phase of construction, from site preparation through project completion, to ensure that all structural, framing, and finishing work meets code and client specifications. The business is equipped to manage both large-scale remodels and smaller updates, coordinating with architects, engineers, and suppliers as needed. Mark Nagel Building emphasizes clear communication throughout the process, helping homeowners in the Gilroy area achieve functional and tailored living spaces. Project types displayed in the portfolio include kitchen remodels, bathroom updates, and general home improvements.
Mark Nagel Building Services
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Mark Nagel Building Contact Information
Phone Number: (408) 390-3920
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Address: 10000 WALTER WELSHER CT, Gilroy, CA 95020
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Mark Nagel Building Gilroy
Quality
97
82nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mark Nagel Building has a BuildZoom score of 97, which places them above 82% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2023 |
Our building permit records indicate that Mark Nagel Building has worked on at least
2.0 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
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.
Uptown; combination building permit for new stairs with guardrails and new balcony guardrails at existing single family home. rs-1-7. esl. transit priority area. geo haz 52. ced case
Valuation:
$8,000
Permit #:
2357107
Status:
complete
Fee:
$295
Permit Type:
Add/alt 1 or 2 fa...
Building Type:
N/A
Spec space: demolish interior walls relocate restroom sub panel
Valuation:
$100,000
Permit #:
B-BP24-0019
Status:
issued
Fee:
$6,050
Permit Type:
Other structures
Building Type:
N/A
Residential water heater replacement (38 btu) located in closet unit 333
Valuation:
N/A
Permit #:
B202306517
Status:
issued
Fee:
$119
Permit Type:
N/A
Building Type:
N/A
Scope change 9/20/19 uptown. combination building permit to remove deck at existing single family home. rs-1-7. esl. transit priority area. geo haz 52. ced case
Valuation:
$25,000
Permit #:
2319860
Status:
complete
Fee:
$509
Permit Type:
Add/alt acc build...
Building Type:
N/A
Norcal systems inc: temporary permit for demolition one 12
Valuation:
N/A
Permit #:
B-TP11-0003
Status:
final
Fee:
$472
Permit Type:
Ctp-temporary
Building Type:
N/A
U&o and tenant improvement ~530sf suite 400 for equifax personal framing in (2) new offices and associated electrical and mechanical
Valuation:
$15,750
Permit #:
13000-02582
Status:
issued
Fee:
$2,258
Permit Type:
N/A
Building Type:
N/A
Tenant improvement and u&o for confluent to occupy the entire fourth floor (3420 sf). scope of work is to addition an interior stairway that connects two offset floor. only mep is adding one light.**u&o sent on 06/14/19**
Valuation:
$31,500
Permit #:
18000-02836
Status:
final
Fee:
$2,550
Permit Type:
N/A
Building Type:
N/A
Landlord improvement in basement 1800sf. scope of work includes demolish of offices adding glass walls expanding (2) offices and minor electrical work
Valuation:
$30,000
Permit #:
15000-03262
Status:
final
Fee:
$2,809
Permit Type:
N/A
Building Type:
N/A
Install earthquake gas shut-off value. model chosen later from city approved list. (plumbing.)
Valuation:
$500
Permit #:
P16-0285
Status:
final
Fee:
$132
Permit Type:
N/A
Building Type:
N/A
Spyapse: tenant improvement and u&o. addition an stairway to connect the second floor of 444 high and 101 university. buildings are on the same lot and share a common wall no change to the exterior."u&o sent 05/05/2017
Valuation:
N/A
Permit #:
16000-02095
Status:
final
Fee:
$2,107
Permit Type:
N/A
Building Type:
N/A
Permit value $7k message contractor voluntary seismic retrofit strengthening approximate 70 feet. crawlspace brace and bolts. addition new foundation (2) 8-foot segment. (bldg.)
Valuation:
N/A
Permit #:
B16-0913
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove and replace to precast stair tread and riser weld new angle bracket supports like for like
Valuation:
$43,000
Permit #:
17000-02148
Status:
final
Fee:
$2,491
Permit Type:
N/A
Building Type:
N/A
Revised ;ayout of ramp. revisions due to as built conditions
Valuation:
N/A
Permit #:
BLD19-0090
Status:
issued
Fee:
$218
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit strengthening approximate 70 feet. crawlspace brace and bolts. addition new foundation (2) 8-foot segment. (bldg.)
Valuation:
$7,000
Permit #:
B16-0913
Status:
final
Fee:
$749
Permit Type:
N/A
Building Type:
N/A
Accessibility interior upgrade
Valuation:
$50,000
Permit #:
BLD18-0105
Status:
final
Fee:
$1,154
Permit Type:
Multiple rooms
Building Type:
N/A
Updates to s2-s4 r3 do not block door and r3.1 as builts 1/8/16. relative to conditions discovered in field. ref app#2015052772301. n/a for maher
Valuation:
$1
Permit #:
201601147095
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Building/combination building permit/residential/alteration/remodel
2002-03-27
(unit #b) gutt & remodel bathroom/remodel kitchen/add laundry to bathroom/relocate water heater in kitchen area/r&r range & install new hood
Valuation:
$5,400
Permit #:
CB02-0210
Status:
final
Fee:
$446
Permit Type:
N/A
Building Type:
N/A
Suite 120: landlord improvement only for a 428 sf tenant space on the first floor. no exterior work
Valuation:
$15,000
Permit #:
16000-01790
Status:
final
Fee:
$1,171
Permit Type:
N/A
Building Type:
N/A
Norcal systems inc: electrical for new restroom and equipme
Valuation:
N/A
Permit #:
B-EL11-0014
Status:
final
Fee:
$677
Permit Type:
Cel-electrical
Building Type:
N/A
Bring 2 water heaters up to code. duplex 327 & 329 n beverly ct
Valuation:
N/A
Permit #:
B201301147
Status:
final
Fee:
$48
Permit Type:
N/A
Building Type:
N/A
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Mark Nagel Building License info
Verified License
| License # | 752957 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Mark Nagel Building 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 | Hudson Insurance Company |
| Bond Value | $15,000 |
22
Permits
- Building permit records show that Mark Nagel Building has worked on 22 permitted projects.
Mark Nagel Building Employees
MN
Mark Alan Nagel
Owner