Updated: May 12, 2026
Location and Projects
Address
516 29TH AVENUE, Seattle, WA, 98122
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345 Builders Construction
Based in Seattle, 345 Builders LLC brings 18 years of experience to residential construction projects across the greater Seattle area. The company specializes in new home construction and remodels, working with homeowners to realize a variety of project scopes, from major renovations to custom builds tailored to specific client needs. With an understanding of Seattle’s diverse neighborhoods and residential property styles, 345 Builders LLC is equipped to navigate local building codes and design preferences. The company’s portfolio includes both interior and exterior renovations, kitchen and bath remodels, and additions. Throughout each project, 345 Builders LLC coordinates closely with clients, suppliers, and building professionals to deliver functional and lasting results that align with the homeowner’s vision and the requirements of the site.
345 Builders LLC Services
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345 Builders LLC Contact Information
Phone Number: (206) 660-0287
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Address: 516 29TH AVENUE, Seattle, WA 98122
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Remodeling of bedrooms and bathrooms within a single family residence. there is one bearing wall being removed and replaced with a structural beam per the code tables
Valuation:
N/A
Permit #:
24 111880 BU
Status:
final
Fee:
$3,720
Permit Type:
N/A
Building Type:
N/A
A single family residential repair or replacement none project involving (3 bathroom fan) 24 111880 bu
Valuation:
N/A
Permit #:
24 119672 BK
Status:
final
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
Remodel kitchen living dining powder room and entry of existing single family residence. new windows and doors and skylight addition. does not include plumbing mechanical or electrical
Valuation:
N/A
Permit #:
20 114136 BU
Status:
final
Fee:
$4,173
Permit Type:
N/A
Building Type:
N/A
Import and export of new/old soil and gravel 23 109795 br
Valuation:
N/A
Permit #:
24 101529 TG
Status:
final
Fee:
$788
Permit Type:
N/A
Building Type:
N/A
Bradley marquardt add/alt of existing house per 6736073-cn. drainage to existing combined side sewer per plan
Valuation:
$3,000
Permit #:
6790944-SS
Status:
issued
Fee:
$375
Permit Type:
Addition/alteration
Building Type:
Single family/duplex
Ufer ground #6601073
Valuation:
N/A
Permit #:
6638270-EL
Status:
complete
Fee:
$73
Permit Type:
N/A
Building Type:
Single family/duplex
Ufer ground #6604538
Valuation:
N/A
Permit #:
6638269-EL
Status:
complete
Fee:
$73
Permit Type:
N/A
Building Type:
Single family/duplex
Ufer ground #6604539
Valuation:
N/A
Permit #:
6638265-EL
Status:
complete
Fee:
$73
Permit Type:
N/A
Building Type:
Single family/duplex
Interior non-structural remodel of bedroom bathroom closet and laundry. **add on mechanical electrical plumbing
Valuation:
N/A
Permit #:
16 123499 BT
Status:
final
Fee:
$1,677
Permit Type:
N/A
Building Type:
N/A
Building non residential - bnr, interior alteration kirkland women's club - replace two existing windows with "period matching" replacements .
Valuation:
N/A
Permit #:
BNR13-05215
Status:
Finaled
Fee:
$436
Permit Type:
N/A
Building Type:
N/A
Remove an existing deck. construct additional residential space and grade the rear yard to create a reduced slope area. does not include plumbing electrical or mechanical. includes clearing & grading for inspection of drains only
Valuation:
N/A
Permit #:
23 109795 BR
Status:
final
Fee:
$6,534
Permit Type:
N/A
Building Type:
N/A
Excavate below residence lower basement floor construct basement and 1st floor alterations to existing single family residence per plan
Valuation:
$80,000
Permit #:
6233054-CN
Status:
complete
Fee:
$2,909
Permit Type:
Add/alt
Building Type:
Single family/duplex
Construction of backyard cottage tie-in to existing sewer
Valuation:
N/A
Permit #:
6545819-SS
Status:
complete
Fee:
$375
Permit Type:
N/A
Building Type:
Single family/duplex
Type: building single family class: addition to structure, , new landscape retaining walls, , project: pre p*p case
Valuation:
N/A
Permit #:
BLD12-00124
Status:
plancheck
Fee:
$501
Permit Type:
N/A
Building Type:
N/A
Construct deck additions and interior alterations to existing single family residence subject to field inspection (stfi) per floor plan
Valuation:
$30,000
Permit #:
6281844-CN
Status:
complete
Fee:
$1,032
Permit Type:
Add/alt
Building Type:
Single family/duplex
Excavate below residence lower basement floor construct basement and 1st floor alterations to existing single family residence per plan
Valuation:
$80,000
Permit #:
6233054-CN
Status:
complete
Fee:
$2,909
Permit Type:
Add/alt
Building Type:
Single family/duplex
Addition 2-story addition to existing house - reduce scope of work form #6175604 to omit garage <750sf
Valuation:
$0
Permit #:
6187739
Status:
Permit Closed
Fee:
$646
Permit Type:
Single family du...
Building Type:
N/A
Remodel kitchen & upstairs bathroom
Valuation:
$0
Permit #:
6175854
Status:
Permit Closed
Fee:
$370
Permit Type:
Single family duplex
Building Type:
N/A
Type: building single family - bsf class: addition to structure, , cancelled without final inspection requested interior kitchen and bathroom remodel repairs to window addition doors. 3-29-11 added front porch, , project: pre p*p case
Valuation:
N/A
Permit #:
BLD11-00023
Status:
canceled
Fee:
$1,863
Permit Type:
N/A
Building Type:
N/A
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BZ Score
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Avg Project
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Projects
165
BZ Score
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Avg Project
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Projects
164
BZ Score
$32.4K
Avg Project
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Projects
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345 Builders LLC License info
Verified License
| License # | 345BUBL912DC |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for 345 Builders LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 345BUBL912DC |
| Status | Inactive |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- According to the The City of Tukwila, WA, 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 345 Builders LLC at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
100
BuildZoom Score
Insured
| Insurer | Contractors Bonding & Insuranc |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | American States Insurance Co |
| Bond Value | $12,000 |
12
Permits
- Building permit records show that 345 Builders LLC has worked on 12 permitted projects.
345 Builders LLC Employees
BM
Bradley Marquardt
Partner/Member
MC
Marquardt, Bradley Carl
Owner