Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable General Contractor Across Mill Valley
Finding a General Contractor in Mill Valley who understands canyon roads, WUI fire codes, and 1900s cottage framing is harder than it should be. We get it. Penhallow Remodeling serves Mill Valley homeowners with written pricing, a defined arrival window, and the 365-Day Done Right Promise on every project. Call (936) 259-2607 and a real person answers, 24/7.
We know the difference between a Sycamore Park bungalow and a 2005 Blithedale Canyon builder-grade home, because we work on both every month. That local knowledge saves you time, money, and inspection headaches.
Why Penhallow Remodeling Is Mill Valley’s Preferred General Contractor Company
Mill Valley homeowners have been burned before. A contractor who disappears after demo. A verbal estimate that doubles by final invoice. A repair that cracks again before the next fog season. That is exactly why we put everything in writing before the first tool comes off the truck.
The Kingswell Way, operating since 2004, requires a written price before any work starts, a real arrival window, and a written guarantee on every project. Our Mill Valley clients get the same standard: background-checked, uniformed technicians who arrive when they say they will. Trevor Nash leads the Penhallow team, and the number you call is answered by a live person, not a voicemail maze.
Read our reviews from Mill Valley customers and you’ll see the same thread repeated: the price on day one matched the invoice, the crew left the job site cleaner than they found it, and when one small detail needed adjustment months later, we came back at no charge. That is the 365-Day Done Right Promise in action.
General Contractor Services in Mill Valley
General Contractor Services in Mill Valley range from quick kitchen refreshes to full hillside additions, and the project scope here is shaped by WUI fire codes and narrow canyon access in ways you won’t find in flatland Marin. A typical kitchen remodel in Mill Valley runs $14,000 – $45,000. A bathroom remodel lands between $9,000 and $28,000. A home addition starts around $45,000 and can reach $130,000 depending on foundation work and slope engineering.
Kitchen and Bath Remodels
Most Mill Valley kitchens built in the early 2000s are ready for replacement cabinets, countertops, and fixtures. We install Wellborn and KraftMaid cabinetry, Cambria and Silestone quartz, and Kohler or Moen fixtures. Prices reflect material grade and whether we need to move plumbing or electrical.
Whole Home and Hillside Additions
Adding square footage on a Mill Valley hillside means post-and-pier or daylight-basement foundation work, slope drainage, and structural engineering for decomposed-granite soils. We coordinate the engineer, pull permits, and pass inspection. Budget $45,000 – $130,000 for a home addition, and $90,000 – $220,000 for an ADU.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Construction Company in Mill Valley
As a Construction Company in Mill Valley, Penhallow Remodeling handles the full scope: demolition, rough framing, structural work, finish carpentry, and final inspection sign-off. We only take on kitchen remodeling, bathroom remodeling, and whole-home remodels, so our crews know these scopes deeply rather than dabbling in everything.
Builder-Grade Upgrade Projects
Newer Mill Valley homes, particularly in neighborhoods like Almonte and Scott Valley, were built with builder-grade cabinetry, laminate counters, and vinyl windows. We replace those first. Cabinet installation runs $4,000 – $13,000. Countertop installation is $2,000 – $6,500. These are the upgrades that change how a home feels daily.
WUI-Compliant Exterior Work
If your remodel touches siding, roofing, or vents, WUI code applies. We install James Hardie ignition-resistant siding and Class A roofing assemblies. Roof replacement in Mill Valley runs $8,000 – $20,000, and the material spec is not optional. Cal Fire and Marin County inspectors check.
Trusted Brands We Service in Mill Valley
We don’t install materials we can’t stand behind, which is why we source from recognized trade brands. Cambria, Silestone, and Caesarstone countertops carry their own manufacturer warranties that layer on top of ours. KraftMaid and Wellborn cabinets hold up to the damp, foggy conditions common in Mill Valley’s shaded ravines. Kohler and Moen fixtures give you parts availability for decades, not years. James Hardie siding meets WUI ignition-resistance requirements without looking industrial. If you’re replacing a builder-grade kitchen or bath, these are the product lines that hold their value and survive the canyon climate.
Common General Contractor Problems We See in Mill Valley Homes
- WUI code violations on otherwise simple remodels. A kitchen remodel that replaces an exterior vent or touches siding can trigger the fire code. We see homeowners fail inspection because a prior contractor installed the wrong vent type. We spec ember-resistant vents from the start.
- Builder warranty voids from unapproved work. Many 2005 – 2015 Mill Valley homes still carry partial builder warranties. Using non-approved materials or altering structural framing without builder coordination voids coverage. We handle that coordination before demo.
- Rot and mold in shaded canyon homes. The marine fog that sits in Mill Valley ravines accelerates wood rot in older timber framing. We find soft rim joists and sill plates during remodels that were invisible behind drywall. Budgeting for that discovery is part of honest pricing.
- Logistics on narrow upper-canyon roads. Blithedale, Summit, and Marion Avenue simply can’t take a standard flatbed lumber truck. We hand-carry materials uphill or rig small crane lifts over vegetation, adding 15 – 25% to rough-framing labor. Clients relocating from flatter Bay Area towns are consistently surprised by this.
Pricing for General Contractor in Mill Valley, CA
Here are real Mill Valley numbers, not estimate ranges that shift once the job starts. These reflect our local market and the WUI and hillside logistics that shape it.
| Project | Mill Valley Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Roof Replacement | $8,000 – $20,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
What drives a Mill Valley kitchen to the top of that range? Moving plumbing, upgrading to custom Wellborn cabinetry, installing Cambria quartz, and opening load-bearing walls all add cost. The number we write down on day one is the number on the final invoice. Call (936) 259-2607 for a free estimate.
We Also Serve Cities Near Mill Valley
Our crews work throughout central and southern Marin. We serve General Contractor in Mill Valley plus Corte Madera, Larkspur, Sausalito, and Kentfield. Dispatch is coordinated from the brand’s San Francisco Bay Area office, with crews based locally to keep travel time short and arrival windows reliable.
Serving Mill Valley, CA - Our Local Coverage Area
We’re based in the Mill Valley area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About General Contractor in Mill Valley
Start with cabinet hardware, countertops, and fixtures, which almost never void a builder warranty when installed by a licensed contractor. Avoid structural changes, moving plumbing, or cutting into exterior walls without first coordinating with the builder. In one Almonte home, we replaced the original KraftMaid cabinets with Wellborn, added a Cambria countertop, and installed a Kohler faucet, all while coordinating with the builder to keep the remaining warranty intact. Call (936) 259-2607 and ask us to review your warranty terms before you plan.
Yes, if the remodel touches exterior vents, soffits, siding, or any wall penetration. Mill Valley sits almost entirely within a Very High Fire Hazard Severity Zone, so Marin County enforces Wildland-Urban Interface codes on re-roofing, re-siding, and any remodel that opens a building envelope. That means Class A roofing, ember-resistant vents, and ignition-resistant siding are mandatory, not optional. These requirements pull material specifications in a different direction from the moisture management needs created by canyon fog, which is why a local contractor familiar with both conditions matters. Call (936) 259-2607 for a quote that reflects the correct code.
Many newer Mill Valley developments have design review committees that must approve changes visible from the street, which for a bathroom remodel usually means any new window, exterior vent, or roof penetration. Interior-only work rarely needs HOA approval. We handle the paperwork and the review timeline. Call us at (936) 259-2607 and we’ll tell you what your specific community requires.
If your home is above the valley floor on a winding road like Summit Avenue or Blithedale Canyon, expect to add 15 – 25% to rough-framing labor costs for hand-carrying materials or small crane lifts. Standard flatbed lumber trucks cannot navigate many of those curves, and heavy equipment is often prohibited outright. We plan for that in the written estimate, so the number you see reflects real logistics, not a surprise change order. Call (936) 259-2607 for an exact quote.
A small kitchen remodel in Mill Valley typically runs $9,000 – $20,000 when you’re keeping the existing layout and upgrading cabinets, counters, and fixtures. If you move plumbing or remove a wall, the number moves toward the full $14,000 – $45,000 range. Written estimates are free. Call (936) 259-2607 and we’ll give you a number you can plan around.
Written by Trevor Nash, Owner at Penhallow Remodeling, serving Mill Valley and Marin County.
Ready to get a real number? Call Penhallow Remodeling at (936) 259-2607 for a free estimate. A live person answers, and the price we write is the price you pay.