Andersen sits at the premium end of the national window market, and the reason it belongs on a Larkspur shortlist has as much to do with material science as with the name. Its signature Fibrex composite and its clad-wood options were built to give older and design-led homes a substantial, low-maintenance window without the compromises of plain vinyl — a good match for the cottages near the Magnolia Avenue historic district and the custom houses tucked into the redwood canyons. Bay Area Siding Company installs Andersen across Larkspur from its base on Magnolia Avenue, and manages the whole job: measuring, glazing and finish selection, permitting, removal, flashing, air-sealing, and the walkthrough.

Considering Andersen for your home? Request an estimate or call (415) 619-5167.

Start with the material: Fibrex

Andersen's differentiator is Fibrex — a composite of reclaimed wood fiber and thermoplastic polymer. It's more rigid and dimensionally stable than vinyl, which lets Andersen build narrower frames that carry more glass, and it holds dark and rich finishes that many vinyl lines can't sustain. For a Larkspur homeowner who wants a window that reads as architecture rather than a builder-grade insert — but doesn't want to sign up for repainting real wood in a damp climate — Fibrex is the reason Andersen makes the list. Alongside it, Andersen offers wood and clad-wood windows where an interior wood look is the priority.

The Andersen series, sorted for Larkspur

• A-Series — Andersen's top architectural line, clad exterior over a wood interior, with the deepest menu of styles, colors, grille patterns, and historically informed profiles. This is the line for a heritage-caliber or design-led Larkspur home where matching the original character matters, especially near the historic downtown.
• 400 Series — Andersen's long-established clad-wood workhorse: wood interior, protective exterior cladding, wide availability, and a classic look that suits a great many traditional and cottage-style homes.
• 100 Series — full-Fibrex, no wood — Andersen's more value-accessible line while keeping the composite's strength, slim frames, and dark-finish capability. A sensible way into the brand on a whole-home changeout.

Each line comes in the operating styles a Larkspur remodel typically needs — double-hung, casement, awning, picture, and gliding — and can be specified with the glass package your comfort goals and permit require.

Who Andersen is right for

Andersen fits the homeowner who treats windows as part of the house's design and wants a premium, nationally supported brand with a composite or clad-wood look — and is budgeting accordingly, since Andersen's positioning is higher-end. If your project is architectural or custom in the truest sense — oversized openings, unusual shapes, a purist wood window — compare Marvin. If you want strong efficiency and warranty in California-made vinyl at a lower entry point, look at Anlin; for the broadest West Coast vinyl-and-fiberglass range, Milgard; and for another wide national lineup spanning materials, Pella. Our window replacement hub sets them side by side.

Warranty and support

Andersen backs its windows with limited warranties that differ by series and component — glass, frame, finish. We describe warranty coverage generally and confirm the exact current terms in writing before you order — but the brand's national footprint and long track record are part of what buyers are paying for.

The Larkspur fit: character homes, damp winters, and the canyons

Larkspur's housing rewards a window that respects proportion and profile — the older cottages near Magnolia Avenue can be flattened by a heavy-handed replacement, and design-review or heritage considerations can apply near the historic district. Andersen's clad-wood and A-Series lines exist precisely to preserve that character while delivering a modern dual-pane, Low-E unit. On the performance side, Larkspur's mild, marine-influenced climate makes a good window mostly a comfort-and-draft upgrade through wet winters — a real gain in shaded canyon rooms and the damp creekside flats. California's Title 24 caps U-factor and SHGC for replacements, and because those limits vary by climate zone and code cycle, we spec to the code in effect at permit time. The City of Larkspur requires a building permit for window replacement; we handle it.

For canyon and hillside homes, those neighborhoods carry real wildfire exposure, and Central Marin Fire adopted California's updated Fire Hazard Severity Zone maps in 2025. Where an opening is altered on a parcel in a High or Very High zone or the Wildland-Urban Interface, California Building Code Chapter 7A can require multi-pane glazing with at least one tempered pane. Andersen units can be built with tempered glazing to comply; whether your parcel triggers it depends on its designation and whether the work is a repair or an alteration, which we confirm with the City and Central Marin Fire before ordering.

What affects the cost

We don't post prices — every Larkspur job is different, and with a premium brand the range is wide. Drivers: the series (100 Series through A-Series) and glass package; number, size, and shape of openings; retrofit versus new-construction method; whether a canyon parcel requires tempered or multi-pane glazing; framing condition, since rot repair adds scope in this damp climate; and access on a hillside or upper story. A retrofit (insert) keeps the existing frame and is less invasive; a new-construction install removes the window to the framing so flashing can be fully renewed — often the right call on older homes with water history. We assess and recommend on a walkthrough.

Frequently asked questions

What is Fibrex, and why does it matter for my Larkspur home? Fibrex is Andersen's composite of reclaimed wood fiber and polymer. It's more rigid than vinyl, allowing slimmer frames and more glass, and it holds dark finishes well — which lets an Andersen window suit an older Larkspur home's proportions without the upkeep of solid wood in a damp climate.

Can Andersen match the look of my older Larkspur cottage? Yes — the A-Series and 400 Series clad-wood lines offer historically informed profiles, grille patterns, and finishes chosen to respect an original facade, while giving you a modern dual-pane, Low-E unit. Near the historic district, design review may apply, which we manage at permitting.

Do Andersen windows meet Larkspur's canyon fire-glazing requirements? They can. On a canyon or hillside parcel where an altered opening triggers Chapter 7A, Andersen units can be ordered with multi-pane, tempered glazing. Whether your parcel requires it depends on its designation and whether the work is a repair or an alteration, which we confirm with the City and Central Marin Fire before ordering.

Is Andersen worth the premium over vinyl in Larkspur? It depends on your priorities. If architectural fit, finish depth, and a national premium brand matter, Andersen earns its place; if efficiency and warranty in vinyl at a lower cost are the goal, Anlin or Milgard may serve you better. We'll lay out the trade-offs honestly.

Get started

Get a premium, character-right window measured, specced, and installed the first time. Request an estimate or call Bay Area Siding Company at (415) 619-5167. We also handle window replacement, siding replacement, and James Hardie siding in Larkspur, serve the wider Marin area, and post finished work in our project gallery.