Window, door & siding replacement in Mountain View, CA

Serving San Francisco, the East Bay, and the greater Bay Area since 1997

Most homes in Mountain View built before the 1970s are still wearing their original windows, siding, or entry doors — and in a city where the median home value has reached roughly $2,000,000, that wear shows up in more than just a draft.

Mountain View's housing stock spans several distinct eras. Old Mountain View and the neighborhoods near downtown hold Craftsman cottages, farmhouses, and early twentieth-century homes with decades-old single-pane windows. Monta Loma, built in 1954 by architects Jones and Emmons, is one of the Peninsula's best-known Eichler tracts, with floor-to-ceiling glass walls and post-and-beam construction that were never engineered for today's energy standards. Cuesta Park and Waverly Park are largely postwar ranch homes, many still running on the windows and siding they were built with.

Custom Exteriors has spent 29 years and 30,000+ projects helping Bay Area homeowners replace aging windows, entry doors, and siding with Infinity from Marvin, James Hardie, and ProVia and Therma-Tru products, exclusively. We do not install vinyl or builder-grade alternatives.

Climate considerations for Mountain View homeowners

Mountain View runs cooler and foggier than inland Silicon Valley, but original windows still lose the battle with the local climate. San Francisco Bay's marine layer keeps most summer afternoons in the mid-70s to low 80s, and the city sees roughly 260 sunny days a year framing a mild, wet winter.

That moderation is deceptive. Single-pane glass and dated weatherstripping let conditioned air escape and outside temperature swings in, regardless of how mild the average day looks on paper. Homeowners near Shoreline Park and North Bayshore also contend with higher humidity off the bay, which accelerates wear on wood siding and untreated trim. Replacement windows with the right glass package for Title 24, California's state building energy code, address both problems at once: comfort and code.

Replacement windows and patio doors

Infinity from Marvin fiberglass windows are the only window line we install, a deliberate choice after nearly three decades of comparing products for Bay Area homes. Fiberglass expands and contracts at nearly the same rate as glass, so seals stay intact through Mountain View's marine-layer mornings and warmer afternoons in a way vinyl typically does not.

For Monta Loma's Eichler homes, window replacement is a more specialized job. Large-format, post-and-beam openings and floor-to-ceiling glass walls need to be matched to the original opening size and sightlines, not swapped for a standard retrofit unit. Our design consultants handle this regularly and can walk through options that improve energy performance without changing the architecture that makes these homes distinctive.

Multiple glass packages are available to meet Title 24 requirements, and the same Infinity from Marvin fiberglass construction is available in sliding, French, and bi-fold patio doors. We are an Infinity Platinum Partner, Marvin's highest certification tier, and we carry full-size window and door displays in our Pleasanton showroom.

Entry door replacement

A new entry door is one of the highest-return exterior upgrades available, and one of the easiest to complete as a standalone project. We install ProVia and Therma-Tru entry doors, two premium brands that give Mountain View homeowners real choices in fiberglass and steel construction rather than a single line to pick from.

Our design consultants help with hardware, glass inserts, finish, and profile, whether you're matching a Craftsman entry in Old Mountain View or updating a ranch-style front door in Cuesta Park. It's a design process, not a transaction.

James Hardie fiber cement siding

We install James Hardie fiber cement siding exclusively, not because we're required to, but because after 29 years of evaluating siding products, it's what we'd put on our own homes. Fiber cement resists moisture, won't rot, and is non-combustible, a meaningful benefit for homeowners anywhere in the wildfire-adjacent Bay Area.

The ColorPlus Technology finish is factory-applied under controlled conditions, so it holds its color longer than a field-painted alternative and needs far less repainting over time. James Hardie siding is backed by a 30-year non-prorated product warranty and a 15-year ColorPlus finish warranty.

Why Mountain View homeowners choose Custom Exteriors

• 29 years and 30,000+ completed projects across the Bay Area , if something needs attention years from now, we're still here to make it right
• AAMA Certified Master Installers (American Architectural Manufacturers Association) and Diamond Certified
• Full-time, employee installers, not subcontractors
• EPA Lead-Safe Renovation, Repair, and Painting (RRP) Certified — relevant for the pre-1978 homes common in Old Mountain View and Monta Loma
• A physical showroom in Pleasanton with full-size product displays, a straightforward drive across the bay via Interstate 880 and Highway 237

Frequently asked questions

Q: Do I need a permit to replace windows in Mountain View? A: Most window replacement projects in Mountain View require a permit, particularly when the work changes an opening's size or affects a structural element. Custom Exteriors handles permit navigation with the City of Mountain View as part of the project, so this isn't something you have to manage yourself.

Q: How much does window replacement cost in Mountain View, CA? A: Pricing depends on your home's size, the products you choose, and the scope of the project. Premium products like Infinity from Marvin fiberglass windows carry a higher upfront cost than vinyl or builder-grade alternatives — they also last significantly longer and require far less maintenance, and for most Mountain View homeowners the long-term math favors the better product. We provide free, itemized estimates so you know exactly what you're paying for before you decide.

Q: Will new windows actually lower my energy bills? A: Upgrading from single-pane or aging dual-pane windows to Infinity from Marvin fiberglass windows with a high-performance glass package typically reduces heat transfer significantly, which can lower both heating and cooling costs. Actual savings depend on your current windows, your home's orientation, and your HVAC system, so results vary from house to house.

Q: My home is a Monta Loma Eichler with floor-to-ceiling glass walls. Can those be replaced without changing the look of the house? A: Yes. Large-format and post-and-beam window replacement is something our design consultants handle regularly for Eichler homes, matching the original opening size and sightlines so the architecture stays intact while the glass and seals are brought up to current performance standards.

Q: Can I replace just my entry door, or does it need to be part of a larger project? A: Entry door replacement works well as a standalone project. It's one of the most cost-effective ways to improve curb appeal and security without committing to a full exterior remodel.

Q: My home in Old Mountain View was built before 1978. Does that change the project? A: It can. Homes built before 1978 may have lead-based paint present, and federal law requires lead-safe work practices on renovation projects that disturb painted surfaces in those homes. Custom Exteriors is EPA Lead-Safe Renovation, Repair, and Painting (RRP) Certified, and we confirm whether lead-safe procedures apply before installation begins.

Ready to upgrade your Mountain View home's windows, siding, or doors?

Schedule a free, no-pressure consultation and we'll walk through your home, your options, and an itemized estimate, no obligation. Prefer to see the products first? Our Pleasanton showroom has full-size displays of every window, door, and siding product we install.

Convenient financing options

We offer 18 months zero payments and zero interest, or 4.99% financing on approved credit. Financing is a tool to make a project more accessible, not the reason to choose us. Bring it up during your consultation if you'd like to discuss options.

Schedule a Consultation | Visit Our Showroom | Explore Financing Options

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