Updated: Jun 06, 2026
Location and Projects
Address
Portland, OR, 97214
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Zilka Design Construction
Jonathon Zilka brings over two decades of experience to residential design projects in Portland, Oregon. As founder of Zilka Design LLC, he specializes in working with homeowners on additions such as garage rebuilds, second-story expansions, vaulted ceilings, and accessory dwelling units (ADUs). Raised in Portland, Zilka has an in-depth knowledge of local building codes, engineering standards, and construction processes, allowing him to guide projects from initial concept through completion with efficiency. By focusing on the specific structural and permitting requirements of the Portland area, Zilka Design ensures that each design aligns with both client goals and municipal regulations. The firm’s portfolio highlights a range of habitable additions and remodels across the city, emphasizing functional and code-compliant solutions for residential properties.
Zilka Design LLC Services
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Zilka Design LLC Contact Information
Phone Number: (503) 235-2621
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Zilka Design LLC
Quality
105
92nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Zilka Design LLC has a BuildZoom score of 105, which places them above 92% of 62,733 contractors in Oregon.
Activity
|
2 projects
|
2025 |
|
3 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Zilka Design LLC has worked on at least
8.0 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
|
4 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that Zilka Design LLC mostly works on
home addition
projects.
Pricing
|
1 project
|
$5k-$20k |
|
1 project
|
$50k-$100k |
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.
Scope of work includes the following items: building out basement into residential apartment. fire separation between a-2 and b occupancies
Valuation:
$60,000
Permit #:
B1241624
Status:
final
Fee:
$1,610
Permit Type:
N/A
Building Type:
N/A
Single pdf* addition a door with side light to an existing opening in basement. excavate and construct a set of concrete stais leading to door and retaining wall for stairs. exterior light for illuminating the stair dry well under landing for rainwater in stairway
Valuation:
N/A
Permit #:
2023-090322-000-00-RS
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf - revision to remove special inspection for expansion anchors
Valuation:
N/A
Permit #:
2021-112005-REV-03-RS
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
N/A
Replace existing 34 x 22 window with a 60 x 48 millard slider. this will require the concrete wall to be cut to fit the new window and a support beam to be installed to carry the weight with the increased opening. see drawings and calculations for further details
Valuation:
$1,750
Permit #:
413-21-000349-STR
Status:
issued
Fee:
$195
Permit Type:
Alteration
Building Type:
N/A
Single pdf - revision to entry area to reconfigure patio and steps
Valuation:
N/A
Permit #:
2021-112005-REV-02-RS
Status:
filed
Fee:
N/A
Permit Type:
Addition
Building Type:
N/A
Single pdf - revision to specified concrete strength from 3500psi to 2500psi (this change will also void the need for special inspection
Valuation:
N/A
Permit #:
2021-112005-REV-01-RS
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
N/A
*single pdf* addition a door from the basement including a set of stairs and landings for exterior/rear of home. no trades required
Valuation:
N/A
Permit #:
2024-069108-000-00-RS
Status:
filed
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
A avenue; install two egress windows to existing openings in existing basement rooms retrofit 4 existing basement windows with exact replacement size windows
Valuation:
$8,000
Permit #:
499-23-002596-STR
Status:
withdrawn
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Remodel existing main floor to include bedroom dining living and kitchen. one new egress window and one new door to new deck. addition 196 sf addition to rear nw corner of home with new bathroom and closet and two egress sized windows. total two bathrooms basement unfinshed
Valuation:
N/A
Permit #:
2020-135949-000-00-RS
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family res...
Addition 700sf addition to south side of home one story with truss roof addition new bathroom (total two baths) addition new laundry room and untiliy room. addition two new bedrooms and 200sf family room. convert current bedroom to walk in closet
Valuation:
N/A
Permit #:
2020-152114-000-00-RS
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family res...
Single pdf* install a new exterior door in existing window opening. excavate and construct a set of concrete stairs and retaining wall for stairs
Valuation:
N/A
Permit #:
2023-090747-000-00-RS
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Convert basement to adu: construct partion walls to create bedroom kitchen & common area (w/laundry). basement exits to outside via existing stair. **electrical mechanical & plumbing permits to be obtained separately**
Valuation:
N/A
Permit #:
2018-171218-000-00-RS
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family res...
Single pdf - addition 2 new egress windows and wells in basement used for storage only - no other changes to basement
Valuation:
N/A
Permit #:
2022-110399-000-00-RS
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family res...
Single pdf - basement - addition egress window and well to existing home office. ***any et pt or mt separate***
Valuation:
N/A
Permit #:
2022-183504-000-00-RS
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Conversion of 1092sf main floor of existing home to ice cream shop + minor modifications of 600sf apartment on 2nd floor (existing 835sf basement not to be altered - for storage only) **change of occupancy permit**
Valuation:
$15,000
Permit #:
921-19-000181-STR
Status:
final
Fee:
$395
Permit Type:
Alteration
Building Type:
N/A
Change 2 basement windows to meet egress requirements (taller/galvanized wells)
Valuation:
$6,000
Permit #:
569-21-000508-STR
Status:
issued
Fee:
$232
Permit Type:
Alteration
Building Type:
N/A
Legalize partial conversion of basement to living space (no bedrooms) and install egress size window in place of existing window on north elevation
Valuation:
N/A
Permit #:
2019-175089-000-00-RS
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family res...
Install natural gas fuel lines for gas range future hot water tank, future gas fireplace and gas dryer
Valuation:
N/A
Permit #:
2020-136109-000-00-MT
Status:
complete
Fee:
N/A
Permit Type:
Addition/alterati...
Building Type:
Single family res...
New basement layout with a 270 sqft addition to the eastside. moving laundry room and altering the bathroom. kitchen remodel
Valuation:
N/A
Permit #:
2018-157522-000-00-RS
Status:
final
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family res...
Remodel kitchen. remove 2 windows from westsideof home and replace with 1 larger window. install 3 egress windows in basement
Valuation:
N/A
Permit #:
2018-232525-000-00-RS
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family res...
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Zilka Design LLC License info
Verified License
| License # | ALZILZA838PJ |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Zilka Design LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| State | Oregon |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Zilka Design LLC with the Oregon Construction Contractors Board (CCB)
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 186318 |
| Status | Active |
| State | Oregon |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Zilka Design LLC with the Oregon Construction Contractors Board (CCB)
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 168491 |
| Status | Active |
| State | Oregon |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of December, 2024. Check the current license status of Zilka Design LLC with the Oregon Construction Contractors Board (CCB)
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| State | Oregon |
| Business Type | Limited Liability Company |
- According to the Oregon Construction Contractors Board (CCB), 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 135014 |
| Status | Inactive |
| State | Oregon |
| Business Type | Limited Liability Company |
- According to the Oregon Construction Contractors Board (CCB), 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 Zilka Design LLC at the Oregon Construction Contractors Board (CCB).
This is a sample of licensing data; click here to access a complete history.
105
BuildZoom Score
Insured
| Insurer | Security National Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $20,000 |
78
Permits
- Building permit records show that Zilka Design LLC has worked on 78 permitted projects.
Zilka Design LLC Employees
AZ
Anthony Zilka
Partner/Member
ZL
Zilka, Anthony Lewis
Member (Limited Liab
ZJ
Zilka, Jonathon James
Rmi Owner