Single family residential permit process
Apply for a single family permit
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Property research
To better understand your property, do your research early. Check the jurisdiction and zoning to be sure it’s in unincorporated King County and understand what building or land use options you have based on your zoning. Start with our online tools to get the information you need for your application.
Make note of any special conditions on your property, such as...
- Critical areas
- Established clearing limits
- Flood zones
- Historically sensitive areas
- Setback areas
- Shorelines
- Steep slopes
- Total impervious lot coverage
- Wetlands
Confirm your zoning when doing research and understand what building or land use options you have by referencing:
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Prepare
All single-family permits are available on the MyBuildingPermit website including:
- Additions, remodels, decks, garages, and sheds
- Mobile homes
- New construction
- Swimming pools
- Mechanical
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Submit
Submit your application online:
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What to expect
For most permit types you can expect the following after submitting your application online:
- Confirmation email with your application identification number.
- After your application is assigned, your submittal will go through the screening and triage processes. If there is any missing or incorrect information you will be notified at that time through the MyBuildingPermit.com portal.
- Examination of your submitted plans, by only the required Reviewers.
- Pay fees
- Issuance
- Inspections
Note: Incorrect or incomplete application submittals will not be accepted and will delay your application process.
Through the MyBuildingPermit.com portal you can also:
- View application status, invoices and payments
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Set up inspections
We inspect work for code compliance and safety requirements.
Check permit status and more
On the King County Permitting Portal you can:
- View permit status, instructions can be found on our customer service page!
- View record details
- Pay permit fees due for non MyBuildingPermit.com permit types
- Search for permit records
- Schedule inspections
- View inspection times and results
Residential New Single Family Construction
Handouts
Residential Single Family Building Permit
Available on MyBuildingPermit.com
Combined Overview & Checklist (533 KB)
Residential Building Permit Agencies, Who does what
Residential Site Plan Requirements
Residential Drainage Review Requirements
Water Service Requirements
Site Plan, Residential Examples,11" x 17"
Temporary Erosion and Sedimentation Control (TESC) (383KB)
Electronic Permit Plan Requirements
Application Forms
Permit Application for Single Family Residence
Available on MyBuildingPermit.com
Site Areas Worksheet
Energy Worksheets for Residential Construction
New Construction & Additions
2018 King County Energy Code and Ventilation Worksheets
OR
Washington State Energy Code Worksheets
Both 2018 and 2021 forms are available
Residential Drainage Review Requirements
Residential Fire Access and Water Supply Checklist
Site Plan, General
Approval of Building Permit Application; Seattle - King County Public Health Department
Application for Approval of Building Permit
Other Forms and Handouts
Critical Areas Designation
Available on MyBuildingPermit.com
Flood Hazard Certification
Legal Lot
Information and Checklist (240KB)
Property Research Guide and Worksheet
Residential Affidavit for Single Family Residence within Shoreline Management Jurisdiction
Residential Site, Flagging a Site
Sewer Availability
Certificate of Sewer Availability (200KB)
OR
Certificate of Future Sewer Connection (493KB)
OR
On-Site Sewer (septic) Application for Health Department Approval of Building Permit
Soil Health: Achieving the Post-construction Soil Standard
Information and On-Line Calculator
Residential Solar Ready Checklist
Solar Photovoltaic System, Roof Mounted, Residential Exemption
Solar Photovoltaic Systems, Incentives and Permitting Guidance
Water Availability
Certificate of Water Availability (230KB)
OR
Certificate of Future Water Connection (67KB)
OR
Certification to Connect to Future Group A Water System (54KB)
OR
Well permit from Public Health
Residential Single Family Remodel, Addition, and Repair
Handouts
Residential Building Permit Application for Remodel, Addition and Repair Permit
Available on MyBuildingPermit.com
Residential Building Permit Agencies, Who does what
Residential Site Plan Requirements
Residential Drainage Review Requirements
Service Requirements
Site Plan, Residential Examples,11" x 17"
Temporary Erosion and Sedimentation Control (TESC) (383KB)
Electronic Permit Plan Requirements
Application Forms
Permit Application for Residential Single Family Remodel, Addition and Repair Permit
Available on MyBuildingPermit.com
Site Areas Worksheet
Energy Worksheets for Residential Construction
New Construction & Additions
2018 King County Energy Code and Ventilation Worksheets
OR
Washington State Energy Code Worksheets
Both 2018 and 2021 forms are available
Alterations
2018 King County Energy Code Alterations Worksheet
Residential Drainage Inspection Application
Residential Remodel, Fire Access and Water Supply
Site Plan, General
Site Plan for Temporary Erosion and Sediment Control (TESC)
Approval of Building Permit Application; Seattle - King County Public Health Department
Application for Approval of Building Permit
Other Forms and Handouts
Critical Areas Designation
Available on MyBuildingPermit.com
Flood Hazard Certification
Legal Lot
Information and Checklist (240KB)
Property Research Guide and Worksheet
Residential Affidavit for Single Family Residence within Shoreline Management Jurisdiction
Residential Site, Flagging a Site
Residential Setback Exception Agreement, Mechanical Equipment
Sewer Availability
Certificate of Sewer Availability (200KB)
OR
Certificate of Future Sewer Connection (493KB)
OR
On-Site Sewer (septic) Application for Health Department Approval of Building Permit
Soil Health: Achieving the Post-construction Soil Standard
Information and On-Line Calculator
Solar Photovoltaic System, Roof Mounted, Residential Exemption
Solar Photovoltaic Systems, Incentives and Permitting Guidance
Water Availability
Certificate of Water Availability (230KB)
OR
Certificate of Future Water Connection (67KB)
OR
Certification to Connect to Future Group A Water System (54KB)
OR
Well permit from Public Health
Residential - Manufactured (Mobile) Homes
Handouts
Residential - Manufactured (Mobile) Home Permit
Available on MyBuildingPermit.com
Residential Building Permit Application for New Single Family Construction
Residential Building Permit Agencies, Who does what
Residential Site Plan Requirements
Residential Drainage Review Requirements
Water Service Requirements
Site Plan, Residential Examples,11" x 17"
Temporary Erosion and Sedimentation Control (TESC) (383KB)
Electronic Permit Plan Requirements
Forms
Application, Permit
Available on MyBuildingPermit.com
Site Areas Worksheet
Residential Drainage Review Requirements
Residential Fire Access and Water Supply Checklist
Site Plan, General
Site Plan for Temporary Erosion and Sediment Control (TESC)
Approval of Building Permit Application; Seattle - King County Public Health Department
Application for Approval of Building Permit
Other Forms and Handouts
Critical Areas Designation
Available on MyBuildingPermit.com
Flood Hazard Certification
Legal Lot
Information and Checklist (240KB)
Property Research Guide and Worksheet
Residential Affidavit for Single Family Residence within Shoreline Management Jurisdiction
Residential Site, Instructions for Flagging a Site for Permit Applications
Sewer Availability
Certificate of Sewer Availabilty (200KB)
OR
Certificate of Future Sewer Connection (493KB)
OR
On-Site Sewer (septic) Application for Health Department Approval of Building Permit
Soil Health: Achieving the Post-construction Soil Standard
Information and On-Line Calculator
Solar Photovoltaic System, Roof Mounted, Residential Exemption
Solar Photovoltaic Systems, Incentives and Permitting Guidance
Water Availability
Certificate of Water Availability (230KB)
OR
Certificate of Future Water Connection (67KB)
OR
Certification to Connect to Future Group A Water System (54KB)
OR
Well permit from Public Health
Residential Accessory Building and Miscellaneous Structure Permits
Handouts
Residential Accessory Building and Miscellaneous Structure Permits
Available on MyBuildingPermit.com
Residential Accessory Dwelling Units (ADUs)
Residential Building Permit Agencies, Who does what
Residential Site Plan Requirements
Site Plan, Residential Examples,11" x 17"
Temporary Erosion and Sedimentation Control (TESC) (383KB)
Electronic Permit Plan Requirements
Energy Worksheets for Residential Construction
New Construction & Additions
2018 King County Energy Code and Ventilation Worksheets
OR
Washington State Energy Code Worksheets
Both 2018 and 2021 forms are available
Alterations
2018 King County Energy Code Alterations Worksheet
Residential Drainage Inspection Application
Application Forms
Application, Permit
Available on MyBuildingPermit.com
Site Areas Worksheet
Residential Accessory or Agricultural Structure, Fire Sprinkler Access and Water Supply
Site Plan, General
Site Plan for Temporary Erosion and Sediment Control (TESC)
Other Forms and Handouts
Approval of Building Permit Application; Seattle - King County Public Health Department
Application for Approval of Building Permit
Critical Areas Designation
Available on MyBuildingPermit.com
Flood Hazard Certification
Property Research Guide and Worksheet
Residential Affidavit for Single Family Residence within Shoreline Management Jurisdiction
Residential Drainage Review Requirements
Residential Setback Exception Agreement, Mechanical Equipment
Residential Site, Flagging a Site
Soil Health: Achieving the Post-construction Soil Standard
Information and On-Line Calculator
Solar Photovoltaic System, Roof Mounted, Residential Exemption
Solar Photovoltaic Systems, Incentives and Permitting Guidance
Residential Mechanical Permits
Residential Mechanical Permit
Available on MyBuildingPermit.com
Residential Setback Exception Agreement, Mechanical Equipment
Residential Swimming Pools
Affidavit for Application Form
See Application, Permit
Application, permit; Applicant Affidavit
Approval of Building Permit Application; Seattle - King County Public Health Department
Application for Approval of Building Permit
Residential Drainage Review Requirements
Residential Setback Exception Agreement, Mechanical Equipment
Residential Swimming Pools and Hot Tubs
Instructions and Worksheet (213KB)
Conditions and Technical Information (227KB)
Site Areas Worksheet
Site Plan and Temporary Erosion and Sediment Control (TESC) Template and Example
See, Computer Aided Design (CAD) Templates and Other Data Resources packet