Licensed & Insured · CSLB #1051640 · 25+ Years
Licensed drywall experts providing Level 5 smooth finishes, custom repairs, and ADU dry walling across Mill Valley and Marin County.
🚚 About 40 miles / 45–60 minutes from our Castro Valley shop
Serving the Bay Area — pick your area
Nestled beneath Mount Tamalpais, Mill Valley homes require a specialized approach to drywall installation and repair. From mid-century properties shaded by coastal redwoods to modern hillside rebuilds, New Line Drywall Inc. delivers precision taping, seamless texture matching, and Level 5 smooth finishes. With over 25 years of Bay Area trade experience, our licensed team handles everything from settling crack repairs to complete interior drywall remodeling for Marin County homeowners and general contractors.
Whether you are updating an existing living space in Sycamore Park or converting a garage into a legal ADU, our skilled craftsmen bring structural attention to detail to every panel. We specialize in matching existing wall textures, hanging fire-rated drywall, and replacing old water-damaged board caused by high dampness under the canyon canopy. We take pride in clean job sites, crisp corner beads, and smooth surfaces ready for paint.
Every service above is available in Mill Valley. Not sure which finish level you need? Ask us — the estimate is free.
Mill Valley features a rich blend of architecture, from historic early 1900s cabins and custom hillside homes to mid-century modern properties in Tamalpais Valley. High coastal humidity and dense redwood tree canopy create ambient moisture, which often compromises older drywall and lath-and-plaster over time. Additionally, the steep topography causes natural soil movement, leading to stress cracks along door frames, window openings, and ceiling joints. New Line Drywall addresses these unique local challenges by using moisture-resistant green board, high-strength fiberglass mesh reinforcement, and expert Level 5 skim coating to ensure long-lasting, immaculate walls that withstand local conditions.
Neighborhoods we work in:
Call, text or send photos on WhatsApp. We answer 24 hours and give you a clear written price.
We confirm scope, finish level and schedule on site — no surprises added later.
Clean, protected jobsite. Hanging, taping, texture and finish done by our own crew, never subcontracted.
We inspect under raking light with you. If a seam or texture match is off, we fix it before we leave.
Based in Castro Valley, New Line Drywall Inc. (CSLB #1051640) regularly serves Mill Valley and Marin County via I-580 and the Richmond-San Rafael Bridge. Our travel time of 45 to 60 minutes allows us to easily manage full-scale drywall projects and rapid repair work across the North Bay. Backed by over 25 years of hands-on experience, we provide transparent project quotes, reliable scheduling, superior dust containment, and master-level finishing without relying on subcontractors.
Send photos of your project in Mill Valley and get your free estimate faster.
Drywall replacement or conversion work for ADUs in Mill Valley typically falls under the City of Mill Valley Building Division or Marin County Community Development Agency. We install code-compliant fire-rated Type X drywall and moisture-resistant backing to ensure your project passes local structural and fire safety inspections smoothly.
New Line Drywall Inc. — California State License Board #1051640. Licensed, bonded and insured. Verify us at cslb.ca.gov.
Hillside settlement often causes diagonal stress cracks around door corners and window frames. We remove loose tape and damaged gypsum, re-anchor the panels with framing screws, apply heavy-duty mesh tape, and use setting-type compound for a flexible, crack-resistant finish.
Yes, our tradesmen specialize in custom texture matching, including skip trowel, knockdown, orange peel, and hand-applied Spanish heavy textures. We carefully blend the repair area into the surrounding wall so the transition is completely invisible after painting.
A Level 5 finish provides a completely flat, skim-coated surface that eliminates shadowing under natural light. While lighting benefits from Level 5, we always ensure proper surface priming and moisture control measures are taken given Mill Valley’s humid canyon microclimates.
We protect your home by installing heavy plastic isolation barriers, sealing HVAC vents, and placing floor protection from the entryway to the work zone. Our crew uses dust-controlled sanding equipment to keep fine gypsum dust out of your living areas.
Call (415) 756-9502, message us on WhatsApp or send the form. Licensed, insured and backed by more than 25 years of Bay Area drywall work — we answer every request.
Also serving nearby in the North Bay: San Rafael, Petaluma, Sonoma, all of Marin County.