Top latch corner is low
The free end of the gate drops, and the gap at the top gets tighter while the bottom gap opens up.
Start here: Check the top fence gate hinge and the screws or bolts into the hinge-side post first.
Outdoor > Fence
Fence Gate Sagging
Direct answer: A sagging fence gate is usually caused by loose hinge hardware, screws pulling out of the hinge-side post, or a gate frame that has gone out of square. Start by checking whether the post is moving or the gate itself is dropping at the top latch side.
Most likely: Most often, the top hinge has loosened or the hinge-side post has started to lean just enough to let the latch side drop.
Look at the gate with it partly open and then closed. If the whole opening looks tilted, suspect the post first. If the post looks solid but the gate frame is diamond-shaped or the top latch corner has dropped, stay on the gate and hinge hardware. Reality check: a heavy wood gate can sag a little more every season until it suddenly starts dragging. Common wrong move: tightening the latch side first instead of fixing the hinge side and squareness.
Don’t start with: Do not start by forcing the latch, shaving the gate, or buying a new gate. Those moves hide the real problem and usually make the fit worse.
If the hinge post rocks in the ground,the fix is not at the latch or hinge leafs; the post support needs attention.
If the post is solid but the top latch corner hangs low,focus on loose fence gate hinges, pulled fasteners, or a racked fence gate frame.
Last reviewed: 2026-04-04
What a sagging fence gate usually looks like
Whole gate opening looks tilted
The gate and nearby fence section both look off-level, or the hinge post leans when you sight down it.
Start here: Check for hinge-side fence post movement before touching the latch or trimming the gate.
Gate was fine, then started sagging fast
It went from usable to rubbing or missing the latch over a short time, often after wind, rain, or someone hanging on it.
Start here: Look for pulled fasteners, cracked wood around the hinge area, or a bent fence gate hinge.
Metal frame or wood frame looks twisted
The gate is not a clean rectangle anymore, and one diagonal looks longer than the other.
Start here: Check whether the fence gate frame has racked and whether a brace or corner connection has loosened.
Most likely causes
1. Loose or pulled fence gate hinge fasteners
This is the most common cause, especially on wood gates. The top hinge carries the most load and usually shows the first movement.
Quick check: Lift the latch side of the gate by hand and watch the top hinge. If the hinge leaf shifts or the screws move in the wood, that is your problem.
2. Hinge-side fence post movement
If the post leans, rotates, or rocks in the soil, the gate will sag even if the hinges are tight.
Quick check: Grab the top of the hinge post and push it toward and away from the opening. Any visible movement at ground level points to the post or footing.
3. Fence gate frame out of square
A wood gate without enough bracing, or one that has stayed wet, can rack into a diamond shape and drop at the latch side.
Quick check: Compare the top and bottom gaps and sight across the frame. If opposite corners look stretched and the joints have opened, the frame has racked.
4. Bent or worn fence gate hinge
Older strap hinges and lighter hinges on heavy gates can bend, wear, or wallow out at the pin.
Quick check: With the gate partly open, look for a hinge pin that is no longer plumb or hinge leaves that no longer sit flat against the gate and post.
Step-by-step fix
Step 1: Separate a moving post from a sagging gate
You do not want to adjust hardware on a post that is already shifting. That just buys a little time and throws the latch out again.
- Open the gate a few inches so it is not resting hard on the latch.
- Sight down the hinge-side fence post from a few feet back and compare it to nearby fence posts.
- Push and pull the top of the hinge-side post by hand.
- Watch the soil line, concrete line, and the post itself for rocking, twisting, or lean.
- Look for fresh cracks in concrete, widened soil gaps, or rot at the base if it is a wood post.
Next move: If the post stays solid and upright, move on to the hinges and gate frame. If the post moves, leans, or twists, treat that as the main problem. The gate hardware may still need attention later, but the post has to be stabilized first.
What to conclude: A solid post means the sag is likely in the hinge hardware or gate frame. A moving post means the opening itself has changed shape.
Stop if:
- The post rocks noticeably in the ground.
- The post base is rotted through or split.
- Concrete around the post is broken enough that the post can shift under load.
Step 2: Check the top hinge and hinge fasteners first
The top hinge usually tells the story. It carries the drop at the latch side, and loose fasteners there are the fastest common fix.
- Support the latch side of the gate with one hand or a temporary block so the hinge is not under full load.
- Inspect the top fence gate hinge where it attaches to the gate and where it attaches to the post.
- Tighten loose screws or nuts if the hardware is still sound and the wood or metal around it is not damaged.
- Look for screw holes that have wallowed out, cracked wood around the fasteners, or a hinge leaf that has bent away from the surface.
- Repeat the check at the bottom hinge, but give the top hinge the most attention.
Next move: If tightening the hinge hardware lifts the latch side back into position and the gate swings cleanly, you likely found the main fault. If the hardware is tight but the gate still hangs low, look for a bent hinge or a gate frame that has gone out of square.
What to conclude: Loose hardware points to a straightforward hinge repair. Tight hardware with continued sag usually means the hinge is deformed or the gate frame has shifted.
Step 3: Look for a bent hinge or worn hinge pin
A hinge can look tight and still be the problem. Once a hinge leaf bends or the pin wears, the gate drops even with snug fasteners.
- Close the gate slowly and watch whether one hinge twists as the weight comes on.
- Check whether the hinge pin is plumb or whether the hinge barrels no longer line up.
- Look for shiny wear marks, elongated holes, or a hinge leaf that no longer sits flat against the gate or post.
- Compare the top hinge to the bottom hinge. If the top one is visibly more spread, twisted, or worn, that is usually the failed piece.
Next move: If you find a bent or worn hinge, replacing that fence gate hinge is the clean repair. If both hinges look straight and solid, the gate frame itself is probably out of square or the post issue was missed earlier.
Step 4: Check whether the fence gate frame has racked out of square
A gate can sag even with good hinges if the frame has shifted into a diamond shape. This is common on wood gates with weak or loose bracing.
- Stand back and compare the gap above the gate to the gap below it and the gap at the latch side from top to bottom.
- Measure corner to corner diagonally if you can do it safely. A noticeable difference means the frame is out of square.
- Inspect brace boards, corner joints, screws, and fasteners for looseness or separation.
- On a wood gate, look for swollen boards, twisted rails, or joints that have opened after wet weather.
Next move: If the frame is clearly out of square, repair or re-square the gate frame before making final latch adjustments. If the frame is square and the post is solid, go back to the hinge mounting points and hardware condition. One of them is still letting the gate drop.
Step 5: Make the repair, then set the latch only after the gate hangs right
Once the gate is supported correctly, the latch adjustment is quick. Doing it earlier just chases the sag.
- If the post is moving, stabilize or rebuild that support before adjusting anything else on the gate.
- If the top hinge or hinge hardware failed, replace the damaged fence gate hinge or the stripped fence gate hinge screws and bolts with sound hardware that fits the existing gate and post.
- If the frame is out of square, re-secure the loose brace or frame connections and bring the gate back into shape before rehanging it.
- Rehang the gate so the reveal around the opening is even enough for swing and latch clearance.
- Adjust the fence gate latch only after the gate opens, closes, and holds its height without dragging.
A good result: The gate should swing without dropping, clear the ground, and meet the latch without lifting or pushing on the free end.
If not: If the gate still drops after hinge and frame repair, the hinge-side post support is likely shifting under load even if it was subtle at first. Move to a post repair plan or a pro visit.
What to conclude: A gate that hangs correctly before latch adjustment is fixed at the source. A gate that only works after forcing the latch is not really repaired yet.
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FAQ
Why does my fence gate sag at the latch side first?
Because the top hinge carries most of the drop. When that hinge loosens, bends, or pulls away from the post, the free end of the gate falls first and the latch side goes low.
Can I just move the latch down to match the sag?
You can, but it is usually the wrong fix. If the gate is sagging, moving the latch only hides the problem for a while. The gate will keep dropping, start dragging, or put more strain on the hinges and post.
How do I tell if the post is the problem instead of the gate?
Push and pull the top of the hinge-side post and watch the base. If the post rocks, twists, or leans, that is the main issue. If the post stays solid, focus on the hinges and the gate frame.
Do sagging fence gates need new hinges every time?
No. Many just need the existing hinge hardware tightened or the stripped fasteners replaced. Replace the hinge only when it is bent, cracked, worn at the pin, or no longer sits flat and square.
What if the gate only sags when it is open?
That still points to hinge wear, loose hinge mounting, or a weak gate frame. A gate puts more twisting load on the top hinge when it swings open, so problems often show up there first.
Should I trim the bottom of the gate if it is dragging?
Not until you know the gate is hanging correctly. Trimming a sagging gate is a common mistake. If you fix the hinges or post later, the trimmed gate may end up with an ugly oversized gap.