Most sagging gate repairs cost $100-$300. The fix depends on what is causing the sag: hinge problems are cheapest to fix, frame issues are moderate, and gate post problems cost the most. Some repairs are DIY-friendly; others really need a professional.
A sagging gate is more than annoying – it gets worse over time, damages the gate and post, and eventually stops working entirely. Fixing it early is almost always cheaper than waiting.
The three causes of sagging gates
1. Hinge problems (most common, easiest fix)
Hinges wear out, loosen, or bend over time. Signs: Gate worked fine when new but gradually started sagging. Screws may be loose or pulled out of wood.
2. Gate frame problems
The gate itself has twisted, warped, or come apart at the joints. Signs: Gate looks crooked even when lifted. Corners are no longer square. Visible gaps at frame joints.
3. Post problems (most serious)
The hinge post is leaning, rotting, or was undersized from the start. Signs: Post visibly leans. Post wobbles when pushed. Rot visible at base.
Repair costs by cause
| Problem | DIY cost | Pro cost |
|---|---|---|
| Tighten/replace hinges | $20-$50 | $75-$150 |
| Add anti-sag kit | $25-$40 | $100-$175 |
| Rebuild gate frame | $75-$150 | $200-$350 |
| Reset/brace leaning post | Difficult DIY | $150-$300 |
| Replace gate post | Difficult DIY | $200-$400 |
| New gate (walk gate) | $100-$200 | $250-$450 |
DIY fixes you can try first
Tighten hinge screws
Sometimes it is this simple. Use a screwdriver (not a drill – you can overtighten). If screws spin freely, the holes are stripped.
Fix stripped screw holes
For stripped holes: fill with wooden toothpicks and wood glue, let dry, then reinstall screws. Or use longer screws (3 inch instead of 2 inch) to reach fresh wood.
Install an anti-sag kit
A cable-and-turnbuckle kit runs diagonally across the gate. Tightening the turnbuckle pulls the sagging corner up. Available at hardware stores for $25-$40. Works well for mild to moderate sag.
Adjust or replace hinges
If hinges are bent or worn, replace them. Use heavy-duty hinges rated for your gate weight. For large gates, consider hinges with bearings or spring-loaded hinges.
When to call a professional
- Post is leaning or rotting: Requires digging, concrete work, and proper bracing
- Gate frame is twisted: May need complete rebuild or replacement
- Double drive gate: More complex alignment and hardware
- DIY fixes did not work: Underlying problem needs diagnosis
- Pool gate: Must meet code requirements for self-closing and latching
Preventing future sag
- Proper post sizing: Gate posts should be 4×6 or 6×6, not 4×4
- Deep post setting: 30-36 inches deep for gate posts
- Quality hardware: Heavy-duty hinges cost more but last longer
- Steel frame for large gates: Prevents warping and twisting
- Do not hang on gates: Kids swinging on gates accelerates wear
Frequently asked questions
Why does my gate sag even though it is new?
Usually undersized hardware or posts. Cheap hinges on a heavy gate will fail quickly. Gate posts that are too small will lean under the stress. This is a common issue with budget fence installations.
Can a sagging gate damage my fence?
Yes. A sagging gate pulls on the hinge post, which can cause that post to lean. The leaning post then affects adjacent fence sections. Fixing the gate early prevents cascading damage.
Is it cheaper to repair or replace a sagging gate?
Usually repair if the frame is still sound. If the frame is twisted or falling apart, replacement is often the better value. We can assess and give you both options.
Gate giving you trouble?
We fix sagging gates throughout Houston. Most repairs take a couple of hours, and we will tell you upfront whether repair or replacement makes more sense for your situation.