Updated: Mar 22, 2026
Location and Projects
Address
1305 E 29th St, Davenport, IA, 52803
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GW Mangler Construction
GW Mangler Construction, 1305 E 29th St, Davenport, IA (Owned by: Bryant Mangler) holds a General C license and 4 other licenses according to the Douglas County license board.
Their BuildZoom score of 103 ranks in the top 10% of 39,764 Iowa licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring GW Mangler Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
GW Mangler Construction Services
Start a project today:
Custom Home Build
New Home Construction
Medium Multi-Family New Con...
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Medium Multi-Family Remodel...
Other Residential Remodel
Office Renovation
Restaurant Renovation
Retail Renovation
Other Commercial Renovation
Roofing
Hardwood Flooring
Carpets
Laminate Flooring
Other Flooring
Siding
Framing
Wood Fences
Backsplash and Countertops
Stonework
Tile Flooring
Other Stone and Tile
Drywall
Interior Plaster
Brick and Blockwork
Other Masonry
Foundations
Other Concrete
Demolition
Paving, Driveways, and Side...
Excavation and Grading
GW Mangler Construction Contact Information
Phone Number: (563) 508-8728
Address: 1305 E 29th St, Davenport, IA 52803
GW Mangler Construction Davenport
Quality
103
90th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
GW Mangler Construction has a BuildZoom score of 103, which places them above 90% of 39,764 contractors in Iowa.
Activity
|
2 projects
|
2025 |
|
4 projects
|
2024 |
|
6 projects
|
2023 |
Our building permit records indicate that GW Mangler Construction has worked on at least
12.0 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
|
3 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that GW Mangler Construction mostly works on
home addition
projects.
Pricing
|
2 projects
|
< $5k |
|
3 projects
|
$5k-$20k |
|
3 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
|
1 project
|
$100k-$250k |
The typical size of their permits is approximately $29,000. 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 GW Mangler Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
Remove existing car port addition new garage addition (1125 sf) remodel existing home (1260 sf)
Valuation:
$500,000
Permit #:
B25-0312
Status:
issued
Fee:
$2,649
Permit Type:
N/A
Building Type:
N/A
Opening up first floor adding chase & bathroom/laundry room - (2) walls strengthening the wall adjacent to the staircase re- studding (2) bedrooms on second floor. discussed with ms
Valuation:
$30,000
Permit #:
B24-1805
Status:
issued
Fee:
$359
Permit Type:
N/A
Building Type:
N/A
Construct a 576 sf addition to single family home. addition will include a master bedroom and 2 bathrooms on the main floor and a bathroom and living space in walk-out lower level
Valuation:
$180,000
Permit #:
B21-0716
Status:
issued
Fee:
$830
Permit Type:
N/A
Building Type:
N/A
Interior gut and remodel - replace windows and siding - early estimate actual scope of work will be determined and finalized after
Valuation:
$50,000
Permit #:
B22-0765
Status:
issued
Fee:
$258
Permit Type:
N/A
Building Type:
N/A
Construct a 18 x 18 single story 4 seasons room addition on the rear of single family dwelling - setbacks
Valuation:
$70,000
Permit #:
B23-0945
Status:
issued
Fee:
$670
Permit Type:
N/A
Building Type:
N/A
Construct a new 460 sf addition with a 330 sf covered patio
Valuation:
$150,588
Permit #:
B23-1541
Status:
issued
Fee:
$1,026
Permit Type:
N/A
Building Type:
N/A
Finish interior remodel on 2nd floor - application and plans attached
Valuation:
$10,000
Permit #:
B25-0197
Status:
issued
Fee:
$192
Permit Type:
N/A
Building Type:
N/A
Construct a 1510 sf composite deck around swimming pool - approved per jz
Valuation:
$100,000
Permit #:
B23-1216
Status:
issued
Fee:
$939
Permit Type:
N/A
Building Type:
N/A
Construct a covered patio - approved per jz
Valuation:
$45,000
Permit #:
B24-0210
Status:
issued
Fee:
$282
Permit Type:
N/A
Building Type:
N/A
Replace windows (living room & room) - all bedroom windows must meet egress requirements
Valuation:
$3,000
Permit #:
B23-0767
Status:
issued
Fee:
$79
Permit Type:
N/A
Building Type:
N/A
Garage addition - extending existing garage 18 ft
Valuation:
$28,000
Permit #:
B24-1134
Status:
issued
Fee:
$409
Permit Type:
N/A
Building Type:
N/A
Replace a 16 x 15 deck on back side of house
Valuation:
$15,000
Permit #:
B24-1126
Status:
issued
Fee:
$254
Permit Type:
N/A
Building Type:
N/A
Removing wall to open up space in rec room remodel (2) bathrooms
Valuation:
$15,000
Permit #:
B21-0132
Status:
issued
Fee:
$193
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel - drywall flooring cabinets
Valuation:
$2,000
Permit #:
B22-0474
Status:
issued
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
Replace windows
Valuation:
$5,000
Permit #:
B21-0091
Status:
issued
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Replace drywall in kitchen and bathroom
Valuation:
$1,000
Permit #:
B20-0991
Status:
issued
Fee:
$41
Permit Type:
N/A
Building Type:
N/A
Framing out and finishing bathroom in basement
Valuation:
$4,500
Permit #:
B20-0869
Status:
issued
Fee:
$64
Permit Type:
N/A
Building Type:
N/A
Finish basement
Valuation:
$12,000
Permit #:
B20-0172
Status:
issued
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Bathroom remodel - ok per jz
Valuation:
$10,000
Permit #:
B23-1659
Status:
issued
Fee:
$130
Permit Type:
N/A
Building Type:
N/A
Shoring up existing porch roof and adding 1 additional footing replace floor decking and steps
Valuation:
$7,000
Permit #:
B21-0452
Status:
issued
Fee:
$114
Permit Type:
N/A
Building Type:
N/A
GW Mangler Construction Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
GW Mangler Construction License info
Verified License
| License # | C140493 |
| Status | Active |
| County | Douglas County |
| Type | General C |
| Business Type | Sole Proprietorship |
- BuildZoom verified this license was active as of October 2025.
Verify this license's status for GW Mangler Construction at the Douglas County Building Division.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | C115144 |
| Status | Active |
| State | Iowa |
| Type | Contractor |
| Date Issued | 09-05-2025 |
| Business Type | Sole Proprietorship |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for GW Mangler Construction at the Iowa Workforce Development Agency.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 43587 |
| Status | Active |
| State | Nebraska |
| Business Type | Sole Proprietorship |
- When BuildZoom last verified this license, it had an expiration date of November, 2015. Check the current license status of GW Mangler Construction with the Nebraska Department of Labor
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | C121032 |
| Status | Inactive |
| State | Iowa |
| Type | Contractor |
| Business Type | Sole Proprietorship |
- According to the Iowa Workforce Development Agency, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for GW Mangler Construction at the Iowa Workforce Development Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | C001488 |
| Status | Inactive |
| State | Iowa |
| Type | Contractor |
| Business Type | Sole Proprietorship |
- According to the Iowa Workforce Development Agency, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for GW Mangler Construction at the Iowa Workforce Development Agency.
This is a sample of licensing data; click here to access a complete history.
103
BuildZoom Score
18
Permits
- Building permit records show that GW Mangler Construction has worked on 18 permitted projects.
GW Mangler Construction Employees
BM
Bryant Mangler
Owner
CM
Charles Mangler
Owner
GM
Gary Mangler