Chapter
What a double swing gate is, and why estates choose one
A double swing gate has two leaves that meet at the center, each pivoting on its own hinge post. Push a button. The leaves part in unison. You drive through. They close behind you. This is the format of estates, vineyards, and homes where the entry is an event. Homeowners choose double swing for symmetry (the formal, balanced presence that reads as established and intentional), span (from 60 inches to 24+ feet — the only practical format for wide estate driveways), automation (the only gate format we automate — linear arms, articulated operators, underground motors, all engineered for two leaves), wind resistance (each leaf carries half the sail area; less stress on operators and hardware), and emergency access (one leaf can often be opened manually if the other is obstructed). It's the right choice when your opening is 60 inches or wider, when you want automation and access control, when the gate is the first impression of the property, and when daily vehicle traffic makes splitting the load between two leaves worth the investment.
Chapter
Double swing vs. single swing — the 60-inch rule
Our recommendation is single swing up to 60 inches and double swing from 60 inches up. Below 60 inches, a single Sapele leaf is simpler, lighter, and 30–40% less expensive — manual single swing starts at $6,500. Above 60 inches, the physics shift: a single leaf gets heavy, hinge stress multiplies, and the user experience degrades. At 60 inches and beyond, double swing is the right engineering choice — and the only path to automation. Double swing distributes load across two leaves and two piers, halves each leaf's moment arm (the reason 14-ft single swings sag and 14-ft per-leaf double swings don't), handles slope better because each leaf carries half the swing arc, and gives you the symmetrical, formal presence that single swing physically cannot match on a wide driveway. If your opening is under 60 inches and you don't need automation, our single swing service is built for that. Above 60 inches, double swing is what we build.
Chapter
Sapele — our signature wood
We build with Sapele as our standard and our signature. It's the wood we reach for first, the wood we've refined our joinery around, and the wood we recommend to nearly every Bay Area estate. Sapele offers exceptional weather resistance at a practical price point: quartersawn Sapele barely moves seasonally (critical when two leaves must meet precisely at center, 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. After two decades building gates in Atherton, Woodside, Marin, and Napa, we know exactly how Sapele behaves in every microclimate Northern California throws at it — and we know that Sapele's stability is what keeps both leaves matched in dimension so they don't bind at the center meeting point in year ten. Typical Sapele double swing: 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 as needed, 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. The difference matters: White Oak's closed grain and high tannin make it naturally rot-resistant, while Red Oak is essentially interior-grade lumber. White Oak is heavy, strong, and 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 double swing gates, White Oak adds gravitas. Each leaf feels solid — 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 double swing: 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 estate gate should be wood. For coastal corrosion, modern aesthetics, security requirements, or WUI fire-zone compliance, we fabricate double swing gates in aluminum, steel, and wrought iron. Aluminum is light, corrosion-proof, and modern — each leaf weighs 40–80 lb at 8–12 feet, effortless for operators, gentle on piers, 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, and 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, and heavy — hand-forged or machine-wrought details for estate character, requires heavy-duty operators and robust piers ($24,000–$65,000 installed with automation). All three are fully WUI fire-zone compliant as non-combustible materials.
Chapter
Why we don't build with Redwood or Cedar
We get the request often. We understand the sentiment — old fence was Redwood, it feels like California. But we decline, and we want you to understand why. Modern lumberyard Redwood is mostly sapwood (the pale outer growth that rots almost as fast as pine); old-growth heartwood is gone from the market, and you cannot specify all-heartwood reliably. 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, and gouges from moving furniture, looking battered within two years. And 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 (Atherton, Woodside, Menlo Park) are the worst combination of fog and sun. We've replaced more 5-year-old Redwood gates than we can count. The maintenance trap: Redwood and Cedar require refinishing every 12–18 months in Northern California — $800–$1,500 annually — so over 15 years a 'cheaper' Redwood gate costs more than a Sapele gate and looks worse doing it. On a double swing the problem compounds: when two softwood leaves move seasonally, they bind at the center meeting point, throw the operator timing off, and force expensive recalibration year after year. Our alternative: Sapele with a custom stain achieves the warm Redwood tone without the structural compromise.
Chapter
Automating a double swing gate
This is where double swing gates come alive. Two leaves, synchronized, responding to a button press, a keypad code, or a vehicle sensor. We automate every double swing gate we build — it's the format this technology was designed for. Linear arm operators are our default for most 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 arm operators 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 are for very heavy iron or steel gates and high cycle counts: maximum power, commercial-grade reliability, visible or hidden, $9,000–$15,000 per leaf. Every install is commissioned to UL 325: through-beam photoelectric sensors across the opening, edge sensors on the leading edge of each leaf, vehicle loop or approach detector, manual release for power outages, and battery backup that keeps the gate operational for 24–72 hours without grid power — critical for fire evacuation routes. Both leaves are programmed for precision synchronization so the center meeting point is consistent: no gaps, no collisions, no binding. Smart access: standalone or integrated keypads, 2–4 button rolling-code remotes, Nice or LiftMaster apps, Control4 and Savant integration for whole-home automation, RFID and Bluetooth auto-open for daily drivers, and video intercom for verification before opening.
Chapter
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 for extreme exposure or generational timelines. 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 leaf (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 double swing $28,000–$65,000 installed with automation. 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 double swing $35,000–$85,000 installed with automation. We recommend it for coastal Marin or Malibu properties within sight of salt water, legacy estates where the gate should outlast a generation, or when the design demands the finest material regardless of budget.
Chapter
Design archetypes that work as double swings
The Classic Estate: two substantial leaves, vertical or horizontal panels, Sapele or White Oak at 2"–2.5" with blackened-steel strap hinges and a hand-forged center latch — traditional estates, vineyard properties, formal entries ($22,000–$48,000 with automation). The Modern Minimalist: clean lines, rhythmic slats, negative space, aluminum or Sapele with concealed hardware and underground operators — contemporary, mid-century modern, architectural statements ($24,000–$52,000 with automation). The Craftsman: exposed joinery, cloud-lift details, hand-rubbed finish on two matched leaves, quartersawn White Oak or Sapele with custom stain — Craftsman, Prairie, Arts & Crafts estates at estate scale ($26,000–$55,000 with automation). The Mediterranean Estate: massive scale, wrought-iron scrollwork integrated with heavy hardwood panels, arched or segmented top, stone or stucco piers — Tuscan, Spanish Colonial, vineyard aesthetics, heavy-duty articulated operators, integrated lighting ($32,000–$75,000 with automation). The Security Double Swing: steel or wrought iron with minimal gaps, heavy-duty hydraulic operators, full access control — security-focused estates, privacy requirements, two leaves that close with precision so there's no center gap to exploit ($28,000–$65,000 with automation).
Chapter
Sizing, engineering, and California fire-zone compliance
Double swing gates handle slope and span better than single swing because two piers share the load. Flat to 3% grade gets standard hinge posts; 3–6% grade calls for grade-mounted hinges or adjustable bottom guides; over 6% requires retaining-wall integration or a sliding gate alternative. Our standard pier is 24" diameter × 36" deep concrete with rebar cage and 4,000 PSI concrete; heavy iron and steel call for 30" diameter × 48" deep with engineered seismic lateral-load reinforcement; hillside and soft soil get helical piles or expanded footings; every California installation includes seismic-rated hinge mounts and operator reinforcement. For WUI (Wildland-Urban Interface) compliance, non-combustible materials (aluminum, steel, iron) satisfy Chapter 7A without treatment, while hardwood gates (Sapele, White Oak, Ipe, Teak) require ignition-resistant treatment or naturally resistant species documentation. Automation adds fire-zone considerations: operator wiring must be rated for exterior exposure and properly sealed against ember intrusion, both leaves must close automatically in fire-evacuation scenarios (we program failsafe closure on power loss), and battery backup ensures gate closure during outages — non-negotiable on a designated evacuation route. In Zone 0 (0–5 feet from the structure), metal is strongly recommended and increasingly required by insurance carriers in VHFHSZ areas.
