Just Moved to Fremont? Rekey the Locks Before You Unpack the Kitchen

What the seller handed you at closing is a selection, not the full set. Over the life of a house in Fremont, keys go to painters, a flooring crew, the neighbor who fed the cat, the agent's lockbox, and a tenant from 2019. None of those people are likely to show up. All of them could, and you would have no way of knowing until they did. A rekey closes that question in about an hour, for less than the cost of the moving truck's fuel.

This applies with extra force to new construction. The townhome communities that went up around Warm Springs and South Fremont BART were built by crews of dozens, and builder locks are often keyed to a construction master until the buyer moves in. Some are supposed to reset automatically when the homeowner's key is turned. Not all do. If you bought new and nobody has confirmed the construction key is dead, treat it as live and get it pinned out.

Rekeying keeps your existing lock and changes the pins inside so a new key works and every old key stops. It costs $22 to $38 per cylinder. Replacement swaps the whole lock for new hardware at $95 to $265 per door. For a house where the locks turn smoothly, rekeying does everything replacement does for key control, at roughly a quarter of the price. That covers most of Fremont, from the 1980s subdivisions in Ardenwood to the condos near Fremont Hub.

Replacement makes sense when the hardware itself is the problem. A Glenmoor ranch from 1962 may still have its original builder-grade knobs, worn to the point that any similar key jiggles them open. A Niles bungalow from 1915 may have a mortise lock with a skeleton key and no deadbolt at all. Rekeying either one gives you a new key to a weak lock. In those cases, put the money into a solid deadbolt and rekey the doors that are fine.

Townhome and condo communities in Warm Springs and Ardenwood usually come with HOA rules about the front door. Most associations control what the outside of the door looks like, not what is inside the cylinder. Rekeying changes nothing visible and almost never needs approval. Replacing the hardware, especially with a keypad smart lock, may require a finish and style that matches the community standard. Read the CC&Rs before you buy hardware, or ask the management company by email and keep the reply.

Some HOAs also hold a master key for common-area doors or for emergency access to units. If yours does, ask whether that master operates your front door or only the utility spaces. If it operates your door and you rekey, the association will need to be told and may need a copy. That is a normal conversation. What you do not want is to discover the arrangement when a maintenance contractor lets himself in on a Tuesday while you are at work.

Walk the perimeter before you call, because the front door is never the only way in. Older Fremont homes in Mission San Jose and Glenmoor often have a side door from the garage into the yard with a knob that was never rekeyed in decades. The door from the garage into the house is another one, and it is the door most burglars prefer because nobody on the street sees it. Add both to the list before you count cylinders.

Hillside homes in Weibel and along Mission Blvd add gates, a pool house, a detached workshop, and sometimes a second driveway gate with its own lock. Count every keyed cylinder you would want to control, including the sliding door pin lock if it is keyed. Sliding doors themselves usually cannot be rekeyed in the normal sense, but a locksmith can add a keyed patio bolt. Bring the full count to the call and the price can be named as a single figure.

Here is what the math looks like. A three-door house has a front deadbolt and knob, a back deadbolt, and a garage side door knob. That is four cylinders. At $22 to $38 each, the work is $88 to $152, plus the $89 service call, which is applied toward the total. Call it $175 to $240 all in, done in about an hour. Ask to have every door pinned to one key and you leave with a single key for the house at no extra charge.

Compare that to replacement. Four new locks at $95 to $265 per door is $380 to $1,060. The upper end buys you good hardware, and there are houses where it is the right spend. But if the only goal is to make old keys stop working, the rekey wins by a wide margin. Tri-City Locksmith quotes both numbers on the call so you can decide door by door, and the tech brings hardware in case one lock turns out to be worse than it looked.

Renters have the same exposure and less control. In Sundale and the complexes along Fremont Blvd in Irvington, units turn over fast and the previous tenant's spare is rarely collected. California law lets a landlord decide who changes the locks, so ask in writing before you move in. Many landlords will rekey at their own cost when asked. If yours will not, offer to pay for it and give the landlord a copy of the new key, which most leases require anyway.

Roommate changes are the other trigger. When someone moves out of a shared house near Ohlone College and you are not sure every copy came back, a rekey of the front door and the back door runs about $135 with the service call and ends the question. Do it the same week. The longer the gap, the more likely it is that a missing key has already been passed to someone you have never met and never will.