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 Mercer Island
A full gate installation on Mercer Island, including fabrication, footings, operator, and safety testing, typically runs $6,500 to $18,000 depending on gate size, material, and how much trenching the lot requires. Most single driveway swing gates land between $7,500 and $12,000. That is the honest range before anyone walks your property. We quote a written price before any work starts, so the number you approve is the number you pay. Call (469) 530-2485 and we will schedule a site walk.
Mercer Island is different from the mainland. The lots slope, the roots run deep, and the wet winters punish shallow work. We plan for that from the first measurement.
Why Carver Gate Repair Is Mercer Island’s Preferred Gate Installation Company
Mercer Island homeowners deal with a specific frustration: gate contractors who treat the island like any other Seattle suburb. They show up, dig an 18-inch hole, hang a gate, and leave. Six months later the hinge post has leaned and the gate drags. We do not work that way.
Lonnie Burke runs our installation crews to The Garrison Standard. That means a written price before work begins, background-checked and uniformed technicians on site, and a written guarantee on every installation. Not a verbal promise. A document.
Our crews know the island’s roads: East Mercer Way, West Mercer Way, Island Crest Way, the dead-end streets off Gallagher Hill. We know what a sloped driveway off East Mercer does to a gate operator under load, because we have fixed enough of them in Mercer Island to see the pattern.
The 365-Day Done Right Promise applies to installations here. If something is not right within a year, we return and fix it. No charge, no argument. That is in writing.
Gate Fabrication in Mercer Island
Gate fabrication is the process of building a gate to fit an opening, rather than ordering a stock panel and hoping it hangs square. On Mercer Island, where driveways curve, slopes change grade mid-run, and homeowners want gates that match cedar-sided houses rather than a catalog look, fabrication is usually the right call. We build gates from steel, aluminum, or cedar-clad steel, cut and welded to your opening’s exact dimensions. A fabricated single driveway gate in Mercer Island typically runs $3,000 to $6,500, before the operator and ground work. A fabricated double gate on a wide driveway runs higher, often $6,000 to $11,000.
Most Mercer Island homes we work on are not built on flat, square lots. A stock gate assumes the opening is plumb and level. The island’s terrain rarely is. Fabrication lets us account for the actual grade, the actual post spacing, and the actual swing clearance, so the gate closes true instead of binding on the uphill corner.
We do the fabrication in our own shop to your opening’s measurements. The gate arrives ready to hang, not cut and adjusted in your driveway with a grinder. You see the written price for fabrication before we cut any material. If you are replacing a gate that sagged or seized, we will point to the reason the old one failed before we build the new one.
Cedar-Clad Steel Gates
Mercer Island’s housing stock leans heavily toward cedar and timber finishes. A raw steel gate can look out of place on a tree-lined lot off Island Crest Way. We build steel frames for strength, then clad them in cedar that matches the house or fence line. The steel carries the load; the cedar carries the look. That is the combination that holds up to wet winters without rotting or racking.
Custom Swing Gate Fabrication
A swing gate on a sloped Mercer Island driveway needs more than a hinge post set in dirt. The gate’s entire weight bears on the post, and when the ground is clay and threaded with roots, the post moves unless it is set deep and anchored properly. We fabricate the gate to the exact weight the operator will move, so the motor is not working harder than it was built to. That detail shows up in how long the system lasts.
Automatic Gate Installation in Mercer Island
Automatic gate installation means pairing a fabricated or existing gate with an operator, safety devices, and power. On Mercer Island, the hard part is rarely the motor. It is the trenching, the conduit, the entrapment protection, and the grade. A complete automatic gate installation with operator, keypad, safety photocells, and the necessary power run typically runs $4,500 to $9,500 on Mercer Island, and more when the driveway is steep or the power run is long. That is installed, tested, and warrantied.
We install operators from the brands we actually stock and service: LiftMaster, FAAC, BFT, and others. The operator gets matched to gate weight and cycle frequency, not whatever is on the truck. On a sloped Mercer Island driveway, we size the motor for the worst-case load: a heavy gate, fully stopped, on an incline, on a cold morning. Undersized operators fail early here. We do not install them.
Every automatic gate we install on Mercer Island includes UL 325 entrapment protection, reversal testing, and a walk-through of the system with the homeowner before we leave. The gate stops and reverses on contact. We test it repeatedly, in both directions, before we call the job done.
Operator, Safety Edges, and Power
An automatic gate without working safety photocells is a liability waiting to happen, especially on a shared driveway or one that exits onto a blind curve. We install and align photocells, then test the reversing loop. On Mercer Island properties where the driveway meets the road at an angle, we position sensors so the gate can not close on a car or a person caught in the arc. The operator must stop and reverse on contact. That is not optional.
Power Runs and Trenching on Island Lots
Power runs take time here. Mercer Island’s lots are steep, the soil is clay-heavy, and tree roots cross most trench lines. We trench to the right depth, lay conduit, and avoid cutting through root structures when the route allows. On a long driveway off West Mercer Way, the power run alone can add a day or more. That is labor and material that a cheap quote often leaves out. We quote it upfront, in writing.
Trusted Brands We Service in Mercer Island
We install and service Viking, Ghost Controls, and DoorKing operators, along with LiftMaster, FAAC, BFT, and others. That matters less as a list and more as a promise: when we install a gate on Mercer Island, the operator on it is one we can repair next year. We stock common parts for those brands locally, which means a failed limit switch or a burnt control board on a Viking or DoorKing unit does not sit waiting on a backorder while your gate stays open. We match the operator to the gate, the grade, and the way your household actually uses the driveway.
Common Gate Installation Problems We See in Mercer Island Homes
- Shallow post footings that let the hinge post lean within a season. Mercer Island’s clay soil holds water in winter and shifts as it dries in summer. Set a post 18 inches deep and the first heavy gate cycle will start working it loose. We set hinge posts to frost depth and beyond where the soil is unstable.
- Undersized power runs that trip breakers on sloped driveways. A heavy slide gate starting uphill draws peak current right at the moment a thin or undersized run fails. We see this on Mercer Island driveways that climb from the road up to the house. The fix is a properly sized circuit and conduit, quoted before we dig.
- Missing or misaligned UL 325 safety photocells. On a gate that swings toward a blind curve or covers a shared driveway, entrapment protection is not a suggestion. We see gates installed on Mercer Island without functioning photocells or with sensors aimed wrong, so the gate will not reverse when it should. Every installation we do includes photocell alignment and reversal testing.
- Stock gates that can not handle the grade. A gate cut for a flat lot binds when it is mounted on a slope, and the operator strains against it. Mercer Island’s terrain means most openings need a gate built to the actual grade, not a panel pulled from inventory. That is why fabrication is the default here, not the upsell.
Pricing for Gate Installation in Mercer Island, WA
Here is what Gate Installation in Mercer Island costs, without the vague language. A fabricated single swing gate, installed with post footings and a basic operator, runs $7,500 to $12,000. A double gate on a wide driveway runs $9,000 to $18,000. A slide gate for a steep or narrow driveway adds $1,000 to $3,000 over a swing configuration because of the track, receivers, and additional groundwork. Power runs beyond 50 feet, trenching through root zones, and grade corrections all add labor. You will get a written line-item price before we start. If the scope changes during the job, we tell you before we do the work, not after.
Call (469) 530-2485 for a free site walk and written estimate. No pressure, no same-day close tactics. Just a real number.
We Also Serve Cities Near Mercer Island
Our crews serve Mercer Island directly and also take gate installation work in Bellevue, Seattle, Renton, and Kirkland. If your property is on the water side of the island or up near the north end, we handle the same written-price, written-guarantee standard. See our main Gate Installation page for what the process looks like from first call to final test. For more about our work on the island itself, visit Gate Installation in Mercer Island.
Serving Mercer Island, WA – Our Local Coverage Area
We’re based in the Mercer Island 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 Gate Installation in Mercer Island
We set hinge posts at 36 to 42 inches in Mercer Island soil, deeper when we hit clay that holds water or a root zone that has already shifted the old post. The footing is poured concrete around a steel post, not a wooden post set in dirt. That depth is what keeps the gate from sagging at the hinge within the first winter. Call (469) 530-2485 and we will tell you what your specific lot needs after we see it.
Yes. Every automatic gate we install on Mercer Island is built to UL 325, which means it has entrapment protection and we test reversal in both directions before we leave. The gate stops and reverses on contact. We do not install an automatic gate without working photocells and a tested reversing loop. If an existing gate fails an UL 325 check, we will tell you exactly what is missing and what it costs to correct it.
We can, but it has to be the right operator for the weight and the incline. A steep grade means the motor works harder every cycle, so we size it for the worst case, not the average. We also pay close attention to the power run, because a long pull up a hill on undersized wire will cause trips and eventually burn out the control board. That type of install on Mercer Island typically runs $5,500 to $9,500 complete.
Yes, and that is how most Mercer Island installations go. We measure, fabricate the gate to the opening, set the posts, run the power, install the operator, and test the whole system. One crew, one written price, one guarantee. When fabrication and operator are handled by the same team, the gate weight and the motor size are matched from the start. Call (469) 530-2485 to schedule the measurement.
A typical single swing gate installation, including fabrication, footings, power, operator, and testing, takes three to five working days from start to finished walkthrough. Fabrication happens off site while ground work proceeds. Slide gates and steep-grade power runs can add a day or two. We do not promise same-day installation, because gate work done right on Mercer Island is measured, built, and tested over days, not hours. You will have a written schedule before we begin.
For a free estimate on gate installation in Mercer Island, call (469) 530-2485. Lonnie Burke and our crew will walk the property, take the measurements, and give you a written price before any work is scheduled. No moving numbers, no surprises at the end.
Written by Lonnie Burke, Owner at Carver Gate Repair, serving Mercer Island and the surrounding area to The Garrison Standard.