Window Company in Kensington - Written Price Before Anything Is Ordered

Window Company in Kensington, CA

Lightwell Windows & Doors serves Kensington homeowners with window replacement, window installation, and door installation tailored to the East Bay hills’ unique building conditions. Most Kensington jobs involve retrofitting modern fire-rated glazing and solid-core doors into 1920s – 1950s craftsman and Tudor Revival framing, with typical projects running from $800 for a single door installation to $18,000 for whole-home window replacement. Call us at (562) 478-8017 for a free written estimate before any work begins.

Call (562) 478-8017

We’re part of the Cedarwell network, and our San Francisco Bay Area office coordinates dispatch and scheduling for Kensington crews who know the local permit paths, the hillside terrain, and the WUI code requirements that flatland contractors often miss.

Why Kensington Homes Are Different

Kensington’s perch in the East Bay hills creates a damp microclimate that chews through windows and doors faster than most homeowners expect. Dense marine fog and salt-laden air roll off San Francisco Bay daily, accelerating wood-frame rot, seal failure, and hardware corrosion. The sharp temperature swing between afternoon sun and incoming fog causes original wood sash to swell and stick seasonally, a chronic complaint we hear from owners on Arlington Avenue and the hillside streets above Colusa Circle.

The housing stock compounds the challenge. Most Kensington homes are craftsman bungalows, Tudor Revivals, and Mediterranean-style houses built between 1920 and 1955, still carrying original wood-frame single-pane windows and solid-wood entry doors now 70 – 100 years old. Steep hillside lots mean cantilevered and terraced construction with non-standard rough openings, so off-the-shelf replacements rarely fit without modification.

Then there’s the fire code. Kensington sits within California’s designated Very High Fire Hazard Severity Zone, so window and door replacements must meet WUI (Wildland-Urban Interface) fire-resistance standards. Original framing was never designed for modern fire-rated glazing assemblies or solid-core fire-resistant doors, so nearly every retrofit requires careful engineering to maintain both safety compliance and the home’s architectural character.

Permits add another layer. Because Kensington is an unincorporated Contra Costa County pocket surrounded by incorporated cities, permits pull through the county building department, not Berkeley’s or El Cerrito’s. Contractors unfamiliar with this quirk routinely face unexpected county plan-check timelines and a separate inspection scheduling system that can delay projects by weeks if not handled correctly from the start.

Our Main Kensington Services

These are the three services Kensington homeowners call us about most often. Each has its own dedicated Kensington page with deeper detail on pricing, materials, and what to expect.

Window Replacement in Kensington

Most Kensington window replacement projects involve removing original wood-frame single-pane units from 1920s – 1950s openings and installing WUI-compliant fire-rated replacements that fit non-standard rough openings on hillside lots. We measure twice, fabricate custom-sized units when needed, and protect original interior trim wherever possible. Our crews work with pet-safe sealants and schedule noisy demolition outside nap times when families request it. Window Replacement in Kensington

Window Installation in Kensington

New window installation in Kensington typically means cutting openings into existing walls for additions, dormers, or converted spaces, all while maintaining the home’s exterior character and meeting WUI fire-resistance standards. We handle county permit pulls, coordinate Contra Costa inspections, and explain the written price before touching anything. Drop cloths cover every floor path, and we photograph the clean-up before leaving. Window Installation in Kensington

Door Installation in Kensington

Kensington door installation ranges from replacing rotted original solid-wood entries with fire-resistant solid-core units to installing new patio doors on terraced hillside levels with tricky access. We stock fire-rated door slabs and frames that satisfy Very High Fire Hazard Severity Zone requirements without looking institutional. Our technicians follow C.A.R.E. values on every visit: Clean up like it’s our own home, Ask before moving anything, Respect quiet hours, Explain the price first. Door Installation in Kensington

Brands We Service in Kensington

We carry eight manufacturer brands so the recommendation fits your home, not our preferred vendor. For Kensington’s fire-code requirements and coastal climate, we often specify CGI impact-rated vinyl, CWS aluminum-clad wood, or ES Windows thermally broken aluminum systems with WUI-compliant glazing. Most standard hardware and weatherstrip components stay stocked locally for faster turnaround on repairs and adjustments. our brands

Pricing for Window Company in Kensington, CA

Neighborhoods We Serve in Kensington

Our crews work throughout Kensington’s hillside and flatland areas, from the Arlington Avenue corridor to the steeper streets above Colusa Circle and the terraced homes near Kensington Circle. Most appointments are scheduled within a few days, with written estimates delivered during the first visit.

• Arlington Avenue area
• Colusa Circle vicinity
• Kensington Circle and upper hillside
• Portola Road corridor
• Adams Street and lower flatland

Service Area – Cities Near Kensington

We coordinate dispatch from our San Francisco Bay Area office and serve homeowners throughout the East Bay and beyond. If you’re just outside Kensington’s boundaries, we also work in San Francisco, CA, San Jose, CA, and regularly travel to Southern California for larger projects in Los Angeles, CA and San Diego, CA.

FAQs About Window Company in Kensington