Andersen is a national premium brand, and in Los Altos it tends to come up on the homes where the window is a design decision as much as a performance one — the high-end custom rebuilds, the architect-driven remodels, the homes where the owner wants a recognized name and a refined look. Bay Area Siding Company installs Andersen across Los Altos, and what sets it apart in the lineup is its signature Fibrex composite alongside genuine wood and clad-wood options, which give it a reach from durable-and-low-maintenance to fully architectural.

Considering Andersen? Request a bid or call (415) 619-5167.

What makes Andersen distinct

Two things define the brand: the material and the positioning.

• Fibrex composite. Andersen's proprietary composite blends wood fiber and polymer for strength and stability with a slimmer frame than vinyl and far less maintenance than wood. It anchors the 400 Series (Andersen's most popular clad line), the flagship A-Series (architectural, with the broadest style and color range), and the 100 Series (full-Fibrex, a more accessible entry to the composite).
• Premium positioning and recognition. Andersen carries strong brand recognition and a higher-end reputation, which matters to some homeowners on resale and on a design-forward home where the specified brand is part of the package.

Where Andersen fits in Los Altos

The custom homes going up and being reworked in Los Altos often push large, deliberate openings and specific aesthetic targets, and that's Andersen's home turf. The A-Series gives an architect the color, size, and hardware range to hit a precise look; the 400 Series delivers a refined clad-wood appearance with Fibrex durability behind it; the 100 Series brings the composite to a more budget-conscious changeout. On a design-driven remodel where the window has to be right and low-maintenance both, Andersen's composite-and-clad range answers the brief.

A note on sightline: clad-wood and Fibrex frames read more refined than commodity vinyl, but on a glass-forward Eichler where the thinnest possible profile is the whole point, it's worth comparing frame widths across brands before you commit — an aluminum or slim fiberglass line via Milgard, or a fiberglass-forward option from Marvin, may hold a stricter modernist line. We'll put the actual profiles side by side.

How it compares

For premium wood and fiberglass with very large sizes and deep design flexibility, compare Marvin. For a national brand spanning vinyl through wood at a range of price points, see Pella. For West Coast material breadth including fiberglass and aluminum, Milgard; for California-made value vinyl with a strong warranty, Anlin. The window replacement hub frames the whole field. Doing the exterior too? See Los Altos siding replacement. Browse the project gallery and the South Bay service area.

How the job goes

A walkthrough of your existing windows and openings; precise field measurements; a series, frame, and glass selection sized to meet Title 24 and hold your home's look; the City permit; removal with the openings inspected for rot or damage; installation set level and plumb, flashed and air-sealed against water and drafts; then trim, an operation check, and a walkthrough. Retrofit (insert) installs keep the existing frame; new-construction (full-frame) installs take the window to the rough opening so the flashing is fully renewed — the right call where there's rot, water intrusion, or you're resizing the opening, which is common on a custom remodel. Where openings sit under a mature tree canopy, we plan access to protect it.

Los Altos permits and fire glazing

Window replacement is permitted through the City of Los Altos Building Division, and because it's an energy-code alteration, a Title 24 fenestration form is part of the submittal — we handle it. On fire glazing: most of Los Altos is on the valley floor and not within a mapped high fire-hazard severity zone, so the Chapter 7A tempered/multi-pane rules that apply in the western foothills generally don't apply to city parcels. Designation is parcel-specific, so if your home is near the western edge we confirm your address before ordering, and Andersen units can be built with tempered glazing where a parcel requires it.

What affects the cost

Andersen sits at the premium end, so the series and material drive a lot of the number — but so do the count and size of openings (custom homes here have big ones), the glass package needed to hit Title 24, retrofit versus new-construction method, resized openings, the condition of the existing framing, and access on upper stories or around protected trees. We measure and spec before quoting; no online prices.

FAQ

What is Fibrex, and why does it matter? Fibrex is Andersen's proprietary composite of wood fiber and polymer. It's stronger and more stable than vinyl, allows a slimmer frame, and needs far less maintenance than wood — the reason it anchors the 100, 400, and A-Series. It's a good fit when you want durability and a refined look together.

Which Andersen series suits a high-end custom home? The A-Series is the architectural flagship, with the widest style, size, and color range for hitting a precise design. The 400 Series gives a refined clad look with Fibrex durability; the 100 Series is the more accessible full-Fibrex entry. We'll match the series to your design and budget.

Will Andersen preserve the thin sightline of my Eichler? Its clad-wood and Fibrex frames read refined, but on a strict modernist glass wall the thinnest profiles come from aluminum or slim fiberglass lines. We'll compare actual frame widths across Andersen, Milgard, and Marvin so you can hold the look you want.

Do I need a permit for Andersen windows in Los Altos? Yes. The City of Los Altos Building Division reviews window replacement, with a Title 24 fenestration form part of the submittal. We prepare and file it.

Get started with Andersen

Get a premium, design-right window sized, specced, and installed for your Los Altos home. Request a bid or call (415) 619-5167. We also handle window replacement and siding replacement in Los Altos, serve the South Bay, and post finished work in the project gallery.