City 21 construction

Services

Service

from $180

Standard Window AC Install

Service

from $250

Heavy-Duty / Large Unit (15k+ BTU)

Service

from $150

Remove & Replace Existing Window AC

Service

from $50

Additional Weatherproofing / Brackets

Service

from $80

Disposal of Old AC Unit

About

Window AC Installation is a professional service for safely and efficiently installing window air conditioning units in your home or office. City21 Construction provides expert installation to ensure your AC unit is securely mounted, properly sealed, and fully functional for optimal cooling performance.

Warranty for all types of work

Confidence in every job, backed by our warranty.

Extensive work experience

Over 5 years of proven, skilled experience

Qualified employees

Your project is handled by certified, experienced professionals

Want to take advantage of this offer? Just contact us!

Service coverage area

San Francisco

South San Francisco

San Jose

Santa Clara

Fremont

Palo Alto

Sunnyvale

San Mateo

Redwood City

Campbell

Mountain View

Cupertino

Newark

Menlo Park

Los Gatos

Los Altos

Daly City

Oakland

San Bruno

Burlingame

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Professional Window AC Installation by City21 Construction in the SF Bay Area

Keep your home or office cool with expert window AC installation services from City21 Construction. We install all types of window air conditioning units, ensuring they are securely mounted, properly sealed, and fully functional for maximum efficiency.

Our team handles every step — site inspection, unit preparation, professional mounting, sealing, electrical connection, and final testing — providing a complete and hassle-free installation experience.

Choose City21 Construction for reliable, professional, and efficient window AC installation services throughout the SF Bay Area. Stay comfortable and cool all year round with our expert service.