Door Knob Lock Installation

A proper door knob lock installation is more involved than sliding a new knob into an old hole. Our technicians begin by evaluating the door itself — the thickness, the material (hollow-core versus solid wood versus steel), the backset measurement (typically 2-3/8 inches or 2-3/4 inches on most Brooklyn apartment doors), and whether the existing strike plate is seated correctly in the jamb. A misaligned strike plate is one of the most common reasons a door knob with lock and key feels stiff, refuses to latch, or leaves a visible gap that compromises security. Getting those measurements right before drilling or chiseling anything is what separates a professional installation from a DIY job that leaves a door weaker than it started.

We stock and install a broad range of hardware: keyed entry knob locks, privacy knobs, passage sets, and coordinated knob-and-deadbolt combos from trusted hardware manufacturers. When we finish, we test the latch throw, confirm the deadbolt seats fully into the strike box, and verify the key turns smoothly from both sides. Every installation is aimed at being damage-free to the door and frame wherever the existing prep work allows — because in a rental unit or a landmarked brownstone, cosmetic damage matters.

Older Brooklyn buildings — pre-war walk-ups in Prospect Heights, century-old row houses in Sunset Park, commercial storefronts along Atlantic Avenue — very often use mortise lock hardware rather than the cylindrical knob locks common in newer construction. A mortise lock fits into a deep rectangular pocket (the mortise) cut into the edge of the door and combines a latch bolt, a deadbolt, and sometimes a privacy button into a single heavy-duty chassis. The mechanism is more complex, the parts are less interchangeable between brands, and improper installation can crack a vintage wood door edge that took a hundred years to get to where it is. Our technicians are experienced with both antique mortise cartridges and modern high-security replacements, and we carry a range of mortise bodies and cylinders on our service vehicles. Whether it is a straightforward cylinder re-key, a worn case swap, or a full mortise lock installation on a new steel entry door, we handle it on-site.

Mortise hardware also shows up frequently in commercial locksmith calls — small businesses, offices, and mixed-use buildings throughout Brooklyn rely on mortise locks for their combination of strength and functionality. If you manage a commercial property and need consistent keying across multiple mortise-lock doors, or if you're upgrading from a worn-out knob lock to a commercial-grade mortise system, call 718-841-7602 and we'll schedule a same-day or next-day visit.

A door knob with lock alone is not considered sufficient security by most locksmiths or insurance underwriters. The industry standard for entry doors is a knob or lever set paired with a Grade 1 or Grade 2 deadbolt — a one-inch throw bolt that resists kick-in and picking far better than a spring latch. When we arrive for a lock installation call, we routinely assess whether the existing deadbolt is adequate or whether the strike plate is anchored with the short screws that come in the box (which pull free under one solid kick) versus three-inch screws reaching the door stud. That detail alone is one of the most meaningful security upgrades we perform. We also replace worn single-cylinder deadbolts, install double-cylinder deadbolts on glass-adjacent doors, and upgrade to high-security cylinders with restricted keyways on request.

Smart lock installation is increasingly common on Brooklyn entry doors — keypad deadbolts, Bluetooth-enabled knob sets, and app-controlled locks that let you grant access to a dog walker or a family member without cutting a physical key. Our technicians are experienced with the installation and setup of these devices, including calibrating the motor throw, configuring backup key access, and ensuring the door prep is correct so the electronics aren't fighting a binding frame. If you're considering a smart lock for a rental property or a home where you frequently need to manage access remotely, we can walk you through options that fit your door and your situation before any work begins.

Lockouts happen at midnight outside a Bed-Stuy apartment just as often as they happen at noon. As a 24/7 mobile emergency locksmith, Brooklyn Atlantic dispatches a trained, insured technician to your location around the clock — no answering service, no callback queue, just a live person at 718-841-7602 who takes your address and confirms an ETA. When the topic of cost comes up — and it should come up before any work starts — we confirm an exact up-front price before touching the door. Several factors shape that final number: the type of lock hardware involved (a standard knob lock cylinder versus a mortise lock mechanism, for example), the time of day (emergency locksmith calls outside normal business hours carry a service premium that varies), your location within Brooklyn and how far our nearest technician is traveling, and whether you need new parts and hardware versus a re-key or a non-destructive entry. There are no surprise line items after the fact. If you're wondering how much does a locksmith cost in Brooklyn or how much do locksmiths charge on average, the honest answer is that it depends on those variables — which is exactly why we quote your specific job before we start, not after.

We understand that a lockout or a broken lock is already a stressful situation, and that questions like how much should an emergency locksmith cost or how much does an emergency locksmith cost near me are reasonable and important to ask. We encourage every caller to ask for the full quote at the start of the call. Our technicians won't begin work until you've agreed to the price — that's a standard we hold ourselves to on every single job, whether it's a two-minute re-key in Williamsburg or a full commercial locksmith mortise lock installation on a Flatbush storefront. When the job is done, the door should lock and unlock cleanly, the hardware should feel solid, and you should walk away with every key that was promised.

If you're not currently locked out but you're reading this page because you want to improve your door security, a few practical points are worth knowing. First, check whether your door knob lock has a visible brand marking on the face of the cylinder — no-name hardware with no pedigree is often the easiest to defeat and the first thing a commercial locksmith or residential technician will recommend replacing. Second, inspect the gap between your door and the frame when it's closed: if you can see daylight or the latch bolt isn't fully engaging the strike plate, the door is not secure regardless of the quality of the lock. Third, if you've recently moved into a Brooklyn apartment or purchased a brownstone, re-keying or replacing the existing locks is one of the most straightforward security steps available — you have no way of knowing who else has a key to those cylinders.

On the topic of how to pick a door knob lock: we want to be clear that this page won't walk anyone through bypass or picking techniques, because providing that information publicly creates safety risks for residents and property owners. What we will say is that the best protection against lock picking, bumping, or shimming is hardware with a higher security rating — anti-pick pins, hardened steel inserts, and restricted keyways that can't be duplicated at a hardware store. If you are locked out, the legitimate path is to verify your identity and ownership with our technician, who will then use professional tools to gain non-destructive entry where possible. Call 718-841-7602 and we'll have someone on the way.

Brooklyn Atlantic 24 Hour Locksmith handles the full spectrum of residential and commercial door hardware needs across Brooklyn. Our on-site services include: keyed entry door knob lock installation, deadbolt installation and replacement, mortise lock installation and repair, mortise cylinder re-keying, high-security cylinder upgrades, smart lock installation and programming, keypad lock installation, double-cylinder deadbolt installation, passage and privacy knob set replacement, lever handle lock installation, door knob with lock and key re-keying, master key system setup for multi-unit buildings, commercial storefront lock installation, office door lock replacement, panic bar and exit device installation, grade-1 deadbolt upgrades for commercial doors, lock-out service for residential entry doors, lock-out service for apartment doors, lock-out service for commercial properties, door frame and strike plate reinforcement, lock re-key after move-in or tenant change, broken key extraction from cylinders, damaged lock repair, door alignment adjustment affecting latch engagement, and emergency board-up coordination when a door cannot be immediately secured. Every one of these services is performed by insured technicians who come to your location across Brooklyn — from Canarsie to Greenpoint, from Bay Ridge to East New York.