Location and Projects
Address
Washington, IA, 52353
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Cornerstone Excavating Inc
Cornerstone Excavating Inc, Washington, IA (Owned by: William Miller) holds a Contractor license according to the Iowa license board.
Their BuildZoom score of 92 ranks in the top 32% of 39,764 Iowa licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Cornerstone Excavating Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Cornerstone Excavating Inc Contact Information
Phone Number: (319) 461-8563
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Cornerstone Excavating Inc Washington
Quality
92
68th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Cornerstone Excavating Inc has a BuildZoom score of 92, which places them above 68% of 39,764 contractors in Iowa.
Activity
|
2 projects
|
2024 |
|
22 projects
|
2023 |
Our building permit records indicate that Cornerstone Excavating Inc has worked on at least
24.0 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
|
20 projects
|
New Constructions |
Analyzing permits over the last 4 years shows that Cornerstone Excavating Inc mostly works on
new construction
projects.
Pricing
|
9 projects
|
$100k-$250k |
|
1 project
|
$500k-$1mil |
The typical size of their permits is approximately $250,000. 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 Cornerstone Excavating Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Single family home
Valuation:
$250,000
Permit #:
20210492
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family home
Valuation:
$250,000
Permit #:
20210491
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family home
Valuation:
$250,000
Permit #:
20210362
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
8 x 12 water tap at the intersection of rochester ave & heron circle
Valuation:
N/A
Permit #:
EXV23-0456
Status:
complete
Fee:
$1,560
Permit Type:
N/A
Building Type:
N/A
Demolish all structures for new subdivision
Valuation:
$20,000
Permit #:
11145
Status:
complete
Fee:
$25
Permit Type:
N/A
Building Type:
N/A
Live water tap - 12 water main this will be actually a 8x12 water main tap. js
Valuation:
N/A
Permit #:
EXV23-0437
Status:
complete
Fee:
$760
Permit Type:
N/A
Building Type:
N/A
Need a hydrant meter with 2 connection installed asap
Valuation:
N/A
Permit #:
HYD24-0010
Status:
complete
Fee:
$600
Permit Type:
N/A
Building Type:
N/A
Single family one story home. on slab
Valuation:
$245,000
Permit #:
20210924
Status:
complete
Fee:
$2,553
Permit Type:
N/A
Building Type:
N/A
Single family one story home
Valuation:
$250,000
Permit #:
20210931
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family one story home
Valuation:
$250,000
Permit #:
20210930
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family one story home
Valuation:
$250,000
Permit #:
20210929
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family one story home
Valuation:
$250,000
Permit #:
20210928
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family one story home
Valuation:
$250,000
Permit #:
20210927
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family one story home
Valuation:
$250,000
Permit #:
20210926
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family one story home
Valuation:
$250,000
Permit #:
20210925
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
New single family home on pad 9
Valuation:
$245,000
Permit #:
20220054
Status:
complete
Fee:
$2,756
Permit Type:
N/A
Building Type:
N/A
Single family home
Valuation:
$255,000
Permit #:
20210493
Status:
complete
Fee:
$2,609
Permit Type:
N/A
Building Type:
N/A
Single family home
Valuation:
$255,000
Permit #:
20210354
Status:
complete
Fee:
$2,609
Permit Type:
N/A
Building Type:
N/A
Single family home
Valuation:
$250,000
Permit #:
20210545
Status:
complete
Fee:
$2,581
Permit Type:
N/A
Building Type:
N/A
Single family home
Valuation:
$245,000
Permit #:
20210361
Status:
complete
Fee:
$2,553
Permit Type:
N/A
Building Type:
N/A
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Cornerstone Excavating Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Cornerstone Excavating Inc License info
Verified License
| License # | C103188 |
| Status | Active |
| State | Iowa |
| Type | Contractor |
| Date Issued | 03-31-2026 |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Cornerstone Excavating Inc at the Iowa Workforce Development Agency.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
42
Permits
- Building permit records show that Cornerstone Excavating Inc has worked on 42 permitted projects.
Cornerstone Excavating Inc Employees
JZ
Jim Zieglowsky
NM
Nelson Miller
WM
William J Miller
WM
William Miller
Owner