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 Repair Across San Mateo
Gate repair in San Mateo usually comes down to one of three things: a post that has shifted in the clay soil, a hinge that has rotted from the marine layer, or an operator that has worn out from years of daily cycles. Most repairs run $180 to $600 before parts, and our team from Calder Gate Repair can usually be at your driveway within 90 minutes of your call. We know the fog, we know the soil, and we know how both of them quietly damage gates across San Mateo, from Aragon to Baywood.
Call (903) 417-0793 and talk to a live person who can schedule your repair right now. No voicemail, no chat bot, no four-hour arrival window. We tell you who is coming, when they will pull up, and what it will cost before any work starts.
Why Calder Gate Repair Is San Mateo’s Preferred Gate Repair Company
We have earned the trust of San Mateo homeowners by doing one thing well: repairing gates correctly the first time and standing behind the work in writing. Every Calder job includes three non-negotiables: a written price before any work starts, a written guarantee on the repair, and a free second visit if the repair fails within the 365-Day Done Right Promise window. No fine print, no “we will see what we can do.” It is stated on the invoice.
Technicians arrive in uniform, background-checked, with a live arrival time you can track from your phone. That is the Relay Standard, the booking-to-invoice experience our parent company, Relay Home Co., has refined since 2009. Calder Gate Repair is the dedicated gate division inside that network, independently owned and operated, so you get the feel of a local crew with the systems of a larger company.
We are factory-familiar with LiftMaster, FAAC, BFT, Linear, Viking, Ghost Controls, DoorKing, Elite, and Mighty Mule. When a San Mateo homeowner calls about a gate that will not open, we usually know the fault pattern before we arrive. That is not a sales line. It is nine brands worth of repair history talking.
Driveway Gate Repair in San Mateo
Driveway Gate Repair in San Mateo typically involves restoring a gate that drags, sags, or refuses to open, and the root cause here is rarely the panel itself. Along the El Camino Real corridor and up into the hills, the clay soils absorb winter rain and then dry into hard, shifting ground. Posts move. Gates follow. A gate that scrapes the driveway in February may swing true again by July, which is why homeowners sometimes delay calling. By the time we arrive, the hinge has usually been working against the post for months.
Our crews assess the post condition first, then the hinges, then the operator. Steel posts set in poured concrete are far more stable in San Mateo soil than the short wood posts you see on older Mid-century ranches in neighborhoods like Shoreview and Beresford. A typical hinge and post reset runs $250 to $550. A full post replacement with new concrete footings can reach $1,200 if the old footing has cracked. We quote every job in writing before touching a bolt.
Gate Realignment and Sag Correction
When your gate drops at the latch side, the hinges or post have failed, not the gate leaf. We lift the gate back to level, reset the hinge plates, and replace hinge bolts with heavier-gauge hardware where the old bolts have wallowed out. If the post itself has shifted, we sink a new footing and re-anchor the post so it stays put through San Mateo’s wet-dry cycle.
Safety Edge and Reversal Check
Every automatic gate and driveway gate we touch gets a reversal test after service. That is not optional, and it is not a service upcharge; it is how we verify the gate stops and reverses when it meets resistance. In San Mateo, where many homes have children, pets, and delivery drivers moving around the driveway all day, a working safety edge matters.
Gate Welding in San Mateo
Gate Welding in San Mateo is the fix when the metal itself has failed: cracked hinge welds, rust-pocked rails, broken pickets, or a frame pulling apart at the corner joints. The marine air off the bay accelerates rust on steel and iron, especially in neighborhoods closer to the water like North Central and Hayward Park. A gate that lives within a mile of the bay will rust faster than the same gate in San Carlos or Belmont, and the failure point is almost always the weld or the thin stock around it.
We cut out the rotted or cracked section, weld in new material, grind it flush, and prime it. The repaired area gets a rust-resistant coating before paint, so it does not turn into a new failure point in six months. Simple crack repairs start around $150. Rebuilding a rusted bottom rail and reinforcing the frame typically runs $350 to $700 depending on how much material has to be replaced.
Rust Repair and Reinforcement
A rust blister on the outside usually hides deeper loss on the inside of the tube. We probe the affected area, cut until we find solid metal, and weld in a sleeve or plate that restores strength, not just appearance. For ornamental steel and driveway gates across San Mateo, this usually buys years of service without replacing the entire gate.
Hinge and Latch Welding
When a hinge weld cracks, the gate starts to drop and bind at the latch. We re-weld the hinge to the post and gate frame, then re-check the swing so the gate hangs true. If the latch has been hit too many times, we build it back up or replace the strike plate so the gate actually locks when it closes.
Trusted Brands We Service in San Mateo
Most San Mateo homes run a FAAC or BFT opener on a swing gate, a Linear on a slide gate, or a Viking on an estate property in the hills. We stock common circuit boards, arms, and remotes for these brands in our Bay Area inventory, which means your repair in San Mateo does not wait on a parts truck from Los Angeles. If your opener is beyond repair, we will tell you straight and quote a replacement in writing, with no pressure to buy it from us. Gate Repair is what we do all day, for every major brand you are likely to own.
Common Gate Repair Problems We See in San Mateo Homes
- Post rot and footing settlement from damp marine air. The constant fog along the El Camino corridor keeps wood posts damp for months at a time. Combined with clay soil that swells and shrinks, you get posts that lean, twist, or drop, taking the gate with them.
- Loop detector and safety photocell faults after driveway work. When a San Mateo driveway gets resurfaced or patched, the vehicle loop wire under the asphalt often gets cut or disconnected. The gate still has power, but it refuses to open for your car, and the safety beams may misalign after the driveway surface changes height.
- Operator wear misdiagnosed as motor failure. On older swing and slide gates, a stripped rack and pinion or a worn gear train makes the same grinding noise as a dead motor. We rebuild or replace the gear set instead of selling you a new opener you do not need.
- Gate drag and latch misalignment after soil movement. When the post shifts, the gate drops, and suddenly the latch does not catch. Forcing the gate closed bends the latch and the keeper, and the problem compounds. We lift, level, and re-align the whole assembly, not just the latch.
Pricing for Gate Repair in San Mateo, CA
What you pay for gate repair in San Mateo depends on what has actually failed, and we lay that out in a written estimate before any work begins. A bent hinge or a failed safety photocell usually runs $180 to $300 including the service call. Rebuilding a rotted hinge post with a new concrete footing ranges from $550 to $1,200 depending on post size and access. Operator repairs, including a new gear set or circuit board, typically fall between $250 and $600 before parts. Full opener replacement starts around $900 installed, and we write the exact parts and labor line by line.
Every estimate is free, and the price you approve is the price you pay. The invoice never changes at the door. If the repair fails within 365 days, Calder returns and makes it right at no charge. That is the guarantee, written on every job.
We Also Serve Cities Near San Mateo
Our Gate Repair in San Mateo crews also run calls into Burlingame, Belmont, Millbrae, and San Carlos throughout the week. If you live just over the line in one of those cities, the same pricing, the same written guarantee, and the same live arrival tracking apply. Call (903) 417-0793 and we will get you scheduled from our Bay Area office, with a technician dispatched to your area.
Serving San Mateo, CA - Our Local Coverage Area
We’re based in the San Mateo 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 Repair in San Mateo
In San Mateo, a sagging gate is almost always the post or the hinge, not the gate leaf itself. The marine layer keeps wood posts damp, and the clay-heavy soils under most lots swell when wet and shrink when dry, which slowly shifts the footing. We check the post plumb, the hinge wear, and the ground contact point before we recommend any repair. Call (903) 417-0793 and we will tell you what is actually moving.
Yes, for emergency repair calls like a gate stuck open or a gate blocking the driveway, we typically reach San Mateo homes within 90 minutes. The live person who answers your call at (903) 417-0793 will give you a real arrival window you can track, not a vague “sometime this afternoon.”
Yes. Every automatic gate in San Mateo must meet the same safety standards as a garage door: it has to stop and reverse when it meets resistance, and it has to have working photocells or contact edges. We test these on every service call, because a gate that does not reverse is a serious liability on any San Mateo property.
Usually, yes. Most of the time a gate operator failure is a specific part: a stripped gear, a dead capacitor, a failed limit switch or a burnt circuit board relay. We repair the component actually at fault and quote the repair in writing before ordering parts. Replacement only comes up when the board and the gearbox are both gone and a new unit costs less than the combined repair.
Yes. We weld cracks, rebuild rusted rails, replace broken pickets, and reinforce frames, then we can automate the gate once it swings true. San Mateo has thousands of steel and iron gates that are perfectly good candidates for automation if the structure is sound. Call (903) 417-0793 for a free estimate on welding, repair, or full automation.
Contact Calder Gate Repair in San Mateo
We rebuilt a hinge post and footing on a double swing gate off North Bayshore after the coast fog had rotted the original wood post and let the gate drop and scrape the driveway. After resetting the post in concrete, we corrected the sag, serviced the LiftMaster operator, and re-aimed the safety photocells so the gate reversed cleanly on contact. That is the kind of repair we do every week across San Mateo, and we would be glad to do it for your gate.
Call (903) 417-0793 for a free estimate. A live person answers, gives you a written price before any work starts, and backs the repair with our 365-Day Done Right Promise. If it is not right, we come back free and make it right.
Written by Nico Alvarez, Owner at Calder Gate Repair, serving San Mateo and the surrounding Bay Area.