Free on-site gate assessment - hinges, posts, and your LiftMaster or Nice gate operator checked before anything is quoted
The assessment is free and the quote is the invoice.
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AfterFast, Reliable Gate Installation Across Mill Valley
Gate installation in Mill Valley runs $1,800 to $7,500 for a standard driveway gate system, with most hillside slide gate setups landing between $3,200 and $5,800 including the operator. Most jobs are quoted within a day and scheduled inside two weeks, since nearly every automatic gate here has to meet Marin County fire code for emergency access. Call (877) 610-2993 and you’ll reach a live person – Hal Gatewood or one of his crew, not a voicemail tree.
We know Mill Valley differently than a company running calls out of San Rafael. The steep driveways, the shared rights of way, the redwood roots, the fog that never quite burns off in Cascade Canyon – all of it changes how a gate needs to be built. The name on the shop is Hal Gatewood, and he has been doing this since 2001.
Why Gatewood Fence & Gate Is Mill Valley’s Preferred Gate Installation Company
Hal Gatewood founded this business in 2001 and still answers the phone himself. Mill Valley homeowners tell us the same thing on repeat: they already got burned once by a national outfit that quoted one number on the phone and showed up with a different invoice. That doesn’t happen here. The price you’re quoted is the price on the invoice, and every job carries the 90-Day Done Right Promise in writing. If it’s not done right, one call brings him back. No runaround.
We’re not a franchise and we don’t run a call center. Dispatch is coordinated from our San Francisco Bay Area office, but the person who shows up at your Mill Valley driveway lives in Marin and drives a truck with the Gatewood name on the door. Hal welds on site. If a post is cracked or a hinge is failing, the repair happens in your driveway, not at some shop across the bridge. We’d rather fix a gate than replace it, and we’ll tell you plainly when replacement is the smarter spend.
Every job is done by a background-checked, uniformed person you’ll recognize at the Mill Valley Market later that week. Seniors and veterans get a permanent 10% discount. And there’s no trip charge inside the county, ever.
Our Gate Installation Services in Mill Valley
Here’s what we install most often in Mill Valley, with the local conditions that shape the job.
Driveway Gate Installation
A driveway gate in Mill Valley has to do more than open and close. It has to survive redwood roots heaving the post footings and fog-driven moisture eating at the hinges year-round. We size posts, concrete depth, and operator torque for the actual ground you’re on, not a generic spec sheet. Most driveway gate systems we install in the 94941 and 94942 zip codes run $2,800 to $6,500 complete.
Sliding Gate Installation
Steep hillside driveways in Mill Valley rarely leave room for a swing gate to arc open. A cantilever or V-track slide gate rides parallel to the slope, so it works where a swing gate physically can’t. We install slope-rated sliding gates with heavy-duty uphill hardware and operators that don’t burn out fighting gravity. If your driveway pitches more than a few degrees, this is almost always the answer.
Security Gate Installation
Security gates in Mill Valley are as much about fire access as they are about keeping people out. Marin County fire code requires automatic driveway gates in Very High Fire Hazard Severity Zones to include a Knox key switch so engines can get in during an evacuation. We install the switch, wire it to the operator, and test it with the gate in both the open and closed positions. A gate that blocks the fire department is a liability, not a feature. Security gate systems here typically run $3,500 to $8,500 depending on gate length and operator type.
Pedestrian Gate Installation
Many Mill Valley homes have a separate pedestrian gate alongside the driveway, especially on Throckmorton and the streets climbing toward Mount Tam. These small gates get overlooked until the latch fails or the post rots at the soil line. We build pedestrian gates with the same post-depth standards as the driveway gate, because a sagging walk gate is the first thing a buyer notices during a home inspection. Most run $700 to $1,900 installed.
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.
Trusted Brands We Service in Mill Valley
We’re certified to work on nine major gate brands, and for Mill Valley customers we keep common parts in stock so a repair doesn’t wait a week for a shipment. DoorKing and Elite operators show up constantly on the older custom homes along Summit and up toward Cascade Canyon. Viking and FAAC are common on newer installs in Tamalpais Valley. Ghost Controls and LiftMaster show up on mid-tier systems throughout the downtown corridor. When you call, tell us what operator is on the gate now and we’ll bring the right parts on the first trip.
Common Gate Installation Problems We See in Mill Valley Homes
- Root heave from redwoods and bay laurels. Mature roots push concrete post footings out of level and crush underground operator conduit. We check for root pressure before we ever pour concrete, because fixing it after the fact means tearing everything out.
- Moisture intrusion in operators and panel boxes. The fog that sits under the canopy keeps humidity high all year. Seals fail, circuit boards corrode, and operators die years before their rated life. We use sealed enclosures and dielectric grease on every Mill Valley install.
- Slope-rated hardware that wasn’t. Some installers throw a standard slide gate on a steep driveway and call it done. The operator strains, the bearings wear flat, and the gate jams within two years. We calculate the actual load before specifying the motor.
- Missing or outdated Knox switches. If your gate predates the current fire code, you may not have the emergency access hardware the Marin fire department expects. We can retrofit a Knox key switch onto most existing operators in under two hours.
Pricing for Gate Installation in Mill Valley, CA
Gate installation in Mill Valley is priced per job, not per hour, and we write every line item before work starts. A single swing driveway gate with a basic operator runs $2,200 to $4,800. A slope-rated sliding gate runs $3,200 to $6,500. A full security gate with Knox switch, photocells, and keypad entry runs $4,000 to $8,500. Pedestrian gates run $700 to $1,900. The biggest cost drivers are gate length, operator horsepower, and whether we’re working around live roots or a steep grade. You’ll get a written quote with a firm price before we order anything. Call (877) 610-2993 and Hal will walk you through the numbers himself.
We Also Serve Cities Near Mill Valley
We take calls across southern Marin every day. If you’re in Mill Valley proper, or in Tamalpais Valley, Tamalpais-Homestead Valley, Corte Madera, or Larkspur, Hal’s crew can get to you the same week in most cases. The same local knowledge applies – we’re not learning your town from a GPS.
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 - Gate Installation in Mill Valley
If your home is in a Very High Fire Hazard Severity Zone – which covers nearly all of Mill Valley – yes, virtually every automatic driveway gate must have a fire department-compliant Knox key switch installed so engines can open the gate during an evacuation. We install and test these on every automatic gate we build in Mill Valley, and we can retrofit them onto most existing operators. Call (877) 610-2993 if you’re not sure whether your gate meets current fire code.
On a steep driveway, a swing gate has to arc uphill or downhill, which means the operator has to work against gravity and the gate needs enough flat space to swing open without hitting the slope or the curb. A slide gate rides parallel to the driveway on a track or cantilever system, using far less space and loading the motor far less. On most Mill Valley hillside lots above Throckmorton and up into Cascade Canyon, a slope-rated slide gate is the only option that lasts.
Yes. We stage the new operator and conduit run first, then swap the old unit during a single service window so neither home loses driveway access for more than an hour or two. We do this often on the shared driveways and flag lots scattered through the hills around Cascade Canyon and Tamalpais Valley, where you can’t simply close the gate for a day. Hal’s crew works around your schedule and both neighbors’ access needs.
Redwood and bay laurel roots push up concrete post footings and crush the underground conduit that carries power to the operator. We see root-damaged footings on nearly every older gate in Mill Valley. The fix is a deeper concrete base, conduit routed above or around the root zone, and sometimes a root barrier. We’d rather do that on a new install than dig it all back out two years later.
A properly sealed, correctly set steel gate post in Mill Valley should last 20 to 30 years, but we regularly find posts rusting at the soil line after 8 to 12 because they were never sealed below grade and the fog keeps the base wet year-round. We wrap below-grade steel in protective coating and use concrete to shed water away from the post. It adds a little to the quote and years to the gate. Call (877) 610-2993 for a free estimate – the quote is firm and the price is agreed before any work starts.
Written by Hal Gatewood, Owner at Gatewood Fence & Gate, serving Mill Valley since 2001.