Premium installation, locally trusted

Horizon has served Union City homeowners since 2014. Our crews live and work in the East Bay — we know the building codes, the architectural styles, and the inspection officials of Alameda County firsthand.

Services in Union City

Sliding glass door installation — two- and three-panel systems
Multi-slide door systems — Western Window, LaCantina, Fleetwood
French door installation — single, double, in-swing, out-swing
Pocket door systems — soft-close, custom-fabricated
Whole-home window replacement — energy-efficient, custom shapes
Custom & architect-spec fabrication

Neighborhoods we serve in Union City

Mission Hills, Decoto, Alvarado-Niles, Cabello

Local landmarks near our jobs

Quarry Lakes, Union Landing, Mission Hills

ZIP codes: 94587 • Population served: ~74,000

Get a Free Estimate in Union City

Premium sliding door installation in Union City, CA

Why Union City homeowners choose Horizon

Local Crews

Our technicians live in the East Bay. They know Union City's building codes, inspectors, and neighborhood architectural styles.

10-Year Warranty

Every installation in Union City is backed by our 10-year labor warranty plus full manufacturer product warranties.

Licensed & Insured

Full California contractor licensing, $2M general liability, workers' comp. License and COI provided with every estimate.

Common projects in Union City

Replacement of aging sliding doors in Union City ranch homes

Many of Union City's mid-century homes have original sliding doors that have lost their seal, scratch when sliding, or no longer lock properly. We replace these with modern energy-efficient systems that drop your heating and cooling costs immediately.

Wall-of-glass multi-slide installations for indoor-outdoor living

Capturing Union City's climate and views with a 12–20 foot opening of disappearing glass. Most homes here are excellent candidates — we handle the structural assessment and permit work.

French door upgrades for traditional homes

Union City's historic and traditional homes often benefit from upgraded French doors with multi-point locks, weather sealing, and updated hardware while preserving the original character.

Whole-home window replacement

Energy-efficient replacement windows for older Union City homes typically pay for themselves in 5–8 years through reduced PG&E bills, especially in homes with original single-pane windows.

Sliding Doors & Window Installation in Union City, CA