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What an automatic driveway gate is, and why estates choose one
An automatic driveway gate has motorized operators that open and close on command — remote, keypad, app, vehicle sensor, or intercom. The gate becomes part of your daily rhythm: arrive home, press the button, the leaves part, drive through, they close behind you. No getting out of the car. No wrestling with a heavy leaf in the rain. Homeowners choose automation for convenience (never leave the vehicle), security (controlled access, only authorized vehicles and visitors enter), safety (photoelectric sensors, edge sensors, and auto-reverse prevent injury or damage), integration (the gate becomes part of your Control4, Savant, Crestron, or Lutron Homeworks ecosystem), and property value (automated entry is a premium feature that distinguishes estates). Automation is the reason most clients commission a custom gate in the first place.
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The formats we automate — double swing, sliding, bi-parting
Double swing is our primary automated format: two leaves meeting at center, symmetrical, formal, the estate standard. It handles 60 inches to 24+ feet, wind-resists well because each leaf carries half the sail area, and accepts every operator class from linear arm to underground hydraulic. Cost: $18,000–$120,000+ installed with automation. Sliding gates are our second format: one leaf on a ground-mounted track, no swing arc required, the right choice for tight driveways, steep grades, or any property where interior clearance is scarce. Spans 8–40+ feet and handles slopes that would make swing gates impractical. Cost: $22,000–$85,000+ installed. Bi-parting sliding is our third format: two leaves sliding apart from center on dual tracks, fast cycle (5–8 seconds), clean contemporary aesthetic, ideal for wide openings with limited depth. Spans 10–20+ feet. Cost: $28,000–$95,000+ installed. What we do not automate: single swing gates. They are manual-only by design — a single leaf wide enough to automate becomes too heavy for graceful manual operation, and the operator arm compromises the clean aesthetic. For automated entry, double swing or sliding is the right engineering choice; for openings under 60 inches without automation, our single swing service is built for that.
Chapter
Sapele — the wood we automate with
We build with Sapele as our standard and signature. For automated gates, Sapele is ideal: quartersawn Sapele barely moves seasonally (critical when two leaves must meet precisely at center, cycle after cycle, year after year), it's dense enough to feel substantial at roughly 40 lb per cubic foot but light enough to keep operator costs reasonable and cycle speeds smooth, it takes marine-grade sealers and stains evenly without blotching, and its natural rot and insect resistance handles Bay Area fog cycles, inland heat, and coastal moisture. Two decades of Bay Area work — Atherton, Woodside, Marin, Napa — has taught us exactly how Sapele behaves in every microclimate. For automated double swing gates the dimensional stability is what keeps both leaves matched so they don't bind at center in year ten. Typical Sapele automated gate: 2"–2.5" thick, 80–150 lb per leaf at 8–12 feet, $18,000–$45,000 installed with automation, annual inspection and finish touch-ups, 25–35 year lifespan with basic care. FSC-certified responsibly sourced options available.
Chapter
White Oak — the American Craftsman alternative
For homeowners who want a domestic species with traditional American character, White Oak is our recommendation — not Red Oak. White Oak's closed grain and high tannin make it naturally rot-resistant; Red Oak is essentially interior-grade lumber. White Oak is heavy, strong, dent-resistant, takes pigment beautifully (we can match existing front doors, trim, or interior millwork), and quartersawn White Oak gives the dramatic ray fleck figure that defines Craftsman and Greene & Greene aesthetics. For automated gates, White Oak adds gravitas — each leaf feels solid at 120–200 lb at 8–12 feet, and the grain reads as established, not trendy. The weight requires heavier operators and more robust piers, but the presence is unmistakable. Typical White Oak automated gate: 2.25"–2.5" thick, $22,000–$55,000 installed with automation, best for Craftsman, Prairie, Arts & Crafts estates, and traditional homes.
Chapter
Metal options — aluminum, steel, and wrought iron
Not every automated gate should be wood. For coastal corrosion, modern aesthetics, security requirements, or WUI fire-zone compliance, we fabricate automated gates in aluminum, steel, and wrought iron. Aluminum is light, corrosion-proof, modern — 40–80 lb per leaf at 8–12 feet, effortless for operators, minimal foundation requirements, marine-grade anodizing or Kynar powder coat handles salt air without maintenance ($18,000–$42,000 installed with automation). Steel is strong, versatile, cost-effective — fabricated for security-focused designs or mixed-material hybrids, hot-dip galvanized and powder-coated for longevity ($20,000–$48,000 installed with automation). Wrought iron is ornamental, traditional, heavy — hand- or machine-forged, 150–300 lb per leaf, requires heavy-duty hydraulic operators and robust piers ($24,000–$65,000 installed with automation). All three are fully WUI fire-zone compliant as non-combustible materials.
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Why we don't build with Redwood or Cedar
We get the request often, and we understand the sentiment. But we decline. Modern lumberyard Redwood is mostly sapwood — the pale outer growth that rots almost as fast as pine — and you cannot specify all-heartwood reliably in today's market. Both Redwood and Cedar are softwoods with a Janka hardness of 450–600 lbf versus Sapele at 1,500 lbf; a softwood gate dents from landscape equipment, scratches from dog claws, gouges from moving furniture, and looks battered within two years. Northern California's microclimates are brutal on softwoods: coastal fog cycles swell and check the fibers, inland UV and thermal cycling degrade them faster than hardwoods, and Bay Area mixed zones are the worst combination. We've replaced more 5-year-old Redwood gates than we can count. The maintenance trap: $800–$1,500 in annual refinishing means over 15 years a 'cheaper' Redwood gate costs more than a Sapele gate and looks worse doing it. On an automated gate the problem compounds — softwood leaves move seasonally, bind at center or against tracks, and force expensive operator recalibration year after year. Our alternative: Sapele with a custom stain achieves the warm Redwood tone without the structural compromise.
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Premium hardwood options — Ipe and Teak
For specific properties where standard Sapele isn't enough, we offer two premium tropical hardwoods. These are not our default — they are targeted solutions. Ipe (Brazilian Walnut) is for full coastal sun, WUI fire zones where untreated fire resistance simplifies permitting, or 40+ year minimal-maintenance timelines: nearly twice as dense as Oak, naturally Class A fire-rated, virtually impervious to rot and insects without chemical treatment. Trade-offs: heavier leaves (150–250 lb at 8–12 feet), harder on tools and hardware, specialized fasteners required, and heavy-duty operators with beefier piers to carry the weight. Ipe runs roughly 1.5–2× the cost of Sapele — typical automated double swing $28,000–$65,000 installed. Teak is the gold standard for exterior wood and has been for centuries. Plantation Teak's natural oils make it virtually impervious to water, it moves less than almost any wood on Earth (two Teak leaves will meet precisely at center, season after season, with minimal adjustment), and its oils neutralize the corrosion that salt air and metal fasteners usually create. Pair with 316 stainless and you have a coastal gate that outlives the house. Teak runs 2–3× the cost of Sapele — typical automated double swing $35,000–$85,000 installed. We recommend it for coastal Marin or Malibu properties within sight of salt water, legacy estates, or when the design demands the finest material regardless of budget.
Chapter
Operators, safety, and access control
Operator selection drives reliability. Linear arm operators are our default for most double swing projects: visible arm from post to gate, reliable, easy to service, rated for 150–400 lb leaves, $3,500–$7,500 per leaf installed. Articulated arms handle heavier gates and limited post space: compact mount, high torque, 200–600 lb leaves, $4,500–$8,500 per leaf. Underground (submerged) operators are our recommendation for aesthetic-led estates: completely invisible in a buried vault, the gate looks entirely manual when it isn't moving, $7,500–$12,000 per leaf, requires drainage engineering. Hydraulic operators handle very heavy iron or steel gates and high cycle counts ($9,000–$15,000 per leaf). Sliding gates use rack-and-pinion operators (standard, $4,500–$9,500) or chain-drive (heavy-duty, $6,500–$12,000). Every install is commissioned to UL 325: through-beam photoelectric sensors, edge sensors on the leading edge of each leaf, vehicle loop detectors, manual release for power outages, auto-reverse on resistance, warning lights and audible signals. Access control: standalone or smart-home keypads ($350–$750), vehicle loops for hands-free entry ($500–$1,200), audio intercoms ($800–$2,500), video intercoms with app integration ($1,500–$4,500), RFID for fleet vehicles ($600–$1,800), Bluetooth auto-open ($400–$1,200), and biometric for high security ($2,000–$5,000).
Chapter
Smart home integration and power
Your automated gate should talk to your house. We integrate with Control4 (gate status on every touch panel, 'Arrive Home' scene, temporary codes, video pop-up), Savant (similar full integration with custom programming), Crestron (enterprise-grade automation, complex scene logic), Lutron Homeworks (lighting coordination, arrival/departure scenes), and Nice / LiftMaster native apps for standalone control. Capabilities: open/closed/locked status visible on all home screens, 'Arrive Home' scenes that open the gate, turn on landscape lighting, disarm security, and adjust the thermostat; temporary access codes for guests, deliveries, and service providers; intercom feed pop-ups when the gate call button is pressed; and activity logs showing who opened the gate, when, and how. Power: 110V AC dedicated 20A circuit is standard, with 18"–24" deep conduit from the main panel to the gate piers. Solar arrays with battery banks are available for off-grid properties or green-building goals. Battery backup keeps the gate operational 24–72 hours during PG&E outages — critical for fire-evacuation routes, where it's often required by code. Manual release allows physical disengagement of the operator if all power fails.
Chapter
Sizing, engineering, and California fire-zone compliance
Each format has different space requirements. Double swing needs interior swing arc (leaf width + 2 ft per side), handles flat to 6% grade. Sliding needs track length (gate width + 1–2 ft) and handles excellent grade tolerance including steep slopes. Bi-parting sliding needs track length (half width + 1–2 ft per side) and similar grade tolerance. Pier engineering: double swing standard is 24"–30" diameter × 36"–48" deep concrete piers with rebar cages and 4,000 PSI concrete; heavy iron/steel calls for 30"–36" × 48"–60" with engineered seismic lateral reinforcement; sliding gates use continuous reinforced concrete foundation trench 24"–36" deep with embedded track; bi-parting uses dual reinforced foundations with a shared header beam for synchronization. All California installs include seismic-rated hinge mounts, operator reinforcement, and post-earthquake inspection protocols. Fire-zone compliance: aluminum, steel, and iron satisfy WUI Chapter 7A without treatment; hardwood gates require ignition-resistant treatment or naturally resistant species documentation. Automation adds fire-zone considerations: electrical conduit must be rated for exterior exposure and sealed against ember intrusion, operators are programmed to close gates during fire-evacuation scenarios, battery backup ensures function during grid outages, and manual override lets emergency personnel open the gate if automation fails. In Zone 0 (0–5 ft from structure) metal gates are strongly recommended and increasingly required by insurance carriers in VHFHSZ areas.
