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Their BuildZoom score of 97 ranks in the top 18% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Alternative Heating & Cooling, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Garage and laundry room addition (to exist garage) kitchen addition (under existing roof interior kitchen/living area remodel. does not include clear and grade electrical or plumbing. *add on mechanical
Remove 2 walls and ceiling in kitchen and construct cathedral ceiling. remove 1 wall and addition new wall to reduce family room to create larger bedroom. does not include clear and grade. addition on to existing deck and resurface existing. **add on plumbing** **add on electrical** **add on mechanical**
Addition of office and bump out of living room. new dormer above living area replace existing slab with crawlspace remodel existing portions of house. does not include clearing and grading. does not include electrical (until subs are named). **add on mechanical** **add on plumbing** *add mechanical*#09-127695 ie
New garage and new bonus room above existing garage. includes electrical. does not include clear and grade. **add on mechanical** does not include plumbing (until subs are named)
Remodel kitchen within existing room create dormer to increase head height in existing bedroom and attic. includes plumbing mechanical and electrical (lights and outlets). no clear/grade
Construction of a new room to an existing single family residence and a new covered patio. does not include plumbing or electrical (until subs are named). includes clear/grade. **add on mechanical**
Addition cover of existing deck. relocate laundry room. interior remodel. does not included clearing and grading. *add on electrical and mechanical** **add on plumbing**
Construct new single family residence. includes plumbing mechanical electrical and clearing and grading. automatic fire sprinkler are required designed per nfpa 13d
BuildZoom verified this license was active as of March 2026.
Verify this license's status for Alternative Heating & Cooling at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
License #
KNIGHHC840MO
Status
Active
City
Tukwila
Type
Construction Contractor, Heating/Vent/Air Conditioning And Refrig (Hvac/R)
Class
Corporation
Business Type
Individual, Corporation
BuildZoom verified this license was active as of March 2026.
Verify this license's status for Alternative Heating & Cooling at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
License #
ALTERHC001DB
Status
Active
City
Tukwila
Type
Electrical Contractor, Hvac/Rfrg
Class
Individual
Business Type
Individual, Corporation
BuildZoom verified this license was active as of March 2026.
Verify this license's status for Alternative Heating & Cooling at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
License #
KNIGHHC840MO
Status
Active
State
Washington
Type
Construction Contractor, Construction Contractor
Business Type
Individual, Corporation
BuildZoom verified this license was active as of April 2026.
Verify this license's status for Alternative Heating & Cooling at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Verified License
License #
KNIGHHC8404O
Status
Active
State
Washington
Type
Electrical Contractor, Electrical Contractor
Business Type
Individual, Corporation
BuildZoom verified this license was active as of June 2026.
Verify this license's status for Alternative Heating & Cooling 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
License #
ALTERHC070PD
Status
Active
City
Sammamish
Type
Contractor
Business Type
Individual, Corporation
When BuildZoom last verified this license, it had an expiration date of December, 2021. Check the current license status of Alternative Heating & Cooling with the The City of Sammamish, WA
This is a sample of licensing data; click here to access a complete history.
Inactive License
License #
ALTERHC070PD
Status
Inactive
City
Tukwila
Type
Construction Contractor, Metal Fabrication
Class
Individual
Business Type
Individual, Corporation
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 Alternative Heating & Cooling at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
License #
ALTERHC070PD
Status
Inactive
State
Washington
Type
Construction Contractor, Construction Contractor
Business Type
Individual, Corporation
According to the Washington State Department of Labor & Industries, 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 Alternative Heating & Cooling 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 #
ALTERHC001DB
Status
Inactive
State
Washington
Type
Electrical Contractor, Electrical Contractor
Business Type
Individual, Corporation
According to the Washington State Department of Labor & Industries, 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 Alternative Heating & Cooling at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.