Can all exterior door locks be rekeyed to match one single key?

Yes, absolutely—but with one condition.

All your locks must be the same brand or use the same key type (keyway).

If they are the same type: A locksmith will simply re-pin the internal cylinders so one key opens every door.
If a lock is different (e.g., the gate): The locksmith will just replace that specific cylinder with a matching one.

Call a local locksmith in Sharjah. They will check the locks and either re-pin them or swap a cylinder or two so you only need one single key.

Here is a quick 30-second test you can do right now before calling anyone:

Take your front door key and try to slide it into the keyholes of the back patio, garage, and gate. Do not force it to turn—just see if it slides all the way in.

• If it slides into all keyholes: Great news! All 4 locks share the exact same keyway profile. A locksmith can re-pin all existing lock barrels on-site in under 20 minutes without replacing any hardware.
• If it won't go in: The internal keyway shapes are different.

How to handle mismatched locks in Sharjah villas:

In most Sharjah properties, main entrance, patio, and garage doors use standard Euro-profile cylinders (the oval/capsule-shaped lock barrels). Boundary gates, however, often use different rim locks or heavy-duty latches.

If they don't match, ask the locksmith to perform a "Cylinder-Only Swap":

1. They will leave all your expensive door handles, latches, and decorative plates untouched.
2. They will only unscrew and swap out the internal brass cylinders on the mismatched doors to match your front door's cylinder brand.
3. Once the cylinders are identical, they will pin them all to operate on a single key.

Cost Tip: Always ask the locksmith to provide 5 or 6 master key copies upfront. It is much cheaper to get extra duplicates made at the time of re-pinning than going to a key-cutter later.