Change house locks NYC service from Lenny Locksmith replaces full lock sets when you have just moved in, experienced a break-in attempt, or the existing hardware is worn and unreliable.
Rapid Response — 24/7 Dispatch — All Five Boroughs
Full residential lock replacement
Deadbolts, knob sets, handlesets, and smart locks
Keyed alike so all doors share one key
Same-day NYC service
If the existing hardware is in good shape and you only need to retire the old keys, rekeying is simpler. If the hardware is worn or you want different style or security level, changing the locks is the right move.
Hardware that sticks, wobbles, or shows rust has earned its retirement. So has the anonymous lock that came with the apartment three tenants ago. A full change also makes sense when you want a security upgrade — a Grade 1 deadbolt, a high-security cylinder, or a smart lock — because rekeying keeps the old hardware's limits.
Brownstone entry doors, fire-rated apartment doors, and modern condo doors take different backsets, bore sizes, and strike styles. We measure before recommending, carry the common NYC configurations on the truck, and install to the door's actual condition — including reinforcing tired jambs so the new lock seats solidly.
Just closed on a place in NYC? The period between closing and move-in is the right window for a full lock change — the home is empty, every door is accessible, and you start ownership with keys only you control. We schedule around your closing timeline and can key everything alike before the first box comes in.
After a break-in or an attempt, the locks are evidence, security, and peace of mind all at once. We replace forced or damaged hardware the same day, upgrade the cylinders and strikes while we are there, and document the work for your insurance claim — so the home is well secured before the first night back.
We identify every door that needs new hardware.
We show options for each door.
New locks installed, tested, and keys handed to you.
Serving all five boroughs, with a real shop in East Harlem
New, quality hardware installed
All doors keyed alike
Professional installation
Old hardware disposed or returned to you
Yes — we key all new locks alike so one key opens every door, or we set up a master key if you want different keys for different doors.
At minimum, rekey — you cannot know how many copies of the old key exist. If the hardware is dated or you want an upgrade, a full change is the better investment. Check your lease: most NYC landlords allow it with a key copy for management.
Yes. From brass mortise sets on pre-war doors to modern levers in new construction, we source hardware that fits the door and the look — including finishes that match your existing handles and hinges.
Yes — post-break-in lock changes are priority work. We replace the damaged hardware, upgrade cylinders and strikes where it makes sense, and document everything for your insurance claim.
Available in every borough and neighborhood
Residential locksmith NYC — 24/7 lock rekey, replacement, deadbolt & smart lock install. Manhattan-based, all five boroughs. Call 347-929-9770.
Learn moreInstall house locks NYC — 24/7 new lock installation for doors, remodels, and upgrades. Deadbolts, knobsets, and smart locks. Call 347-929-9770.
Learn moreRekey house locks NYC — 24/7 residential rekey service. Keep your hardware, retire the old keys, and get fresh keys cut on site. Call 347-929-9770.
Learn moreInstall deadbolt NYC — 24/7 same-day installation of single and double cylinder deadbolts. Professional boring and strike-plate prep. Call 347-929-9770.
Learn moreResidential smart locks NYC — 24/7 install and setup of August, Schlage Encode, Yale, Kwikset, and Level smart locks. Call 347-929-9770.
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