Deadbolt Installation

Not every deadbolt is the right fit for every door, and the selection process is one of the most important steps a professional locksmith brings to the job. The three main residential grades — ANSI Grade 1, Grade 2, and Grade 3 — represent meaningfully different levels of resistance to kick-in, drilling, and picking attempts. For most Princeton homes and rental units, a Grade 1 single-cylinder deadbolt from a manufacturer like Schlage or Kwikset offers an excellent balance of security and convenience. For doors with glass panels or sidelights where someone could reach through and turn a thumb-turn, a double-cylinder model requiring a key on both sides is worth considering — though egress planning becomes important in that case.

Jimmy-proof deadbolt installation is another option that comes up frequently, particularly on metal security doors, apartment entry doors, and older Princeton-area properties where surface-mounting is preferred or the door frame won't accommodate a standard bored lock. A jimmy-proof rim deadbolt interlocks with the strike bracket rather than simply throwing a bolt into a hole, making forced entry significantly harder. Our technicians can evaluate whether a surface-mount jimmy-proof deadbolt installation or a mortise-style lock better suits your specific door construction and threat profile — and walk you through the trade-offs before any work begins.

A proper deadbolt installation on an exterior door is more involved than it appears. It starts with confirming the door's thickness (typically 1-3/8" to 1-3/4" for residential exterior doors), measuring the backset (usually 2-3/8" or 2-3/4" from the door edge to the center of the bore), and checking the condition of the door frame and existing prep work. If a hole needs to be bored from scratch — common on doors that previously had only a knob lock — our technicians use hole saws precisely sized for the lock body and latch, keeping the cut clean and square to avoid weakening the door.

The strike plate reinforcement is where many DIY installations fall short. A standard strike plate held in by 3/4" screws provides almost no resistance to a kick-in force. We install heavy-duty strike plates secured with 3-inch screws that anchor into the door's structural framing — a detail that dramatically improves the overall strength of the installation without altering the door's appearance. The deadbolt is then aligned, the throw is verified to fully extend into the strike, and the cylinder is checked for smooth key operation. The entire process is done with care to avoid cosmetic damage to your door's finish or the surrounding trim.

We believe in full transparency before any work starts: our technician will confirm an exact, up-front price after assessing your specific situation — so there are no surprises on the invoice. The final quote depends on several factors: the type and grade of lock being installed, whether new boring or prep work is required versus dropping into existing hardware, the time of day (our 24/7 availability means we're there at 2 a.m. if you need us, including nights, weekends, and holidays), travel distance within our Princeton service area, and any additional parts such as reinforced strike plates, door armor, or high-security cylinders.

If you're upgrading multiple exterior doors at once — a front door, a back door, and perhaps a basement entry — that can affect the overall scope. We'll lay out exactly what each component costs so you can make an informed decision. Call us at (609) 469-6449 any time to describe your situation and get a straight answer about what the job will involve.

Princeton's housing stock is unusually varied — you'll find everything from 200-year-old Federal-style homes near Mercer Street and the Princeton Battlefield area to mid-century colonials in Western Section to newer construction in Lawrence Ville-adjacent developments. Older homes often have non-standard door thicknesses, solid wood frames that require different boring approaches, or existing hardware cutouts that don't match modern lock footprints. A trained technician who works this area regularly knows to check these variables before cutting anything, which is how we avoid the costly mistakes that come from assuming one setup fits all.

We also serve rental properties, multi-unit buildings, and Princeton University-area housing where landlords need reliable re-keying or fresh deadbolt installations between tenants. A lock that's been through multiple tenant cycles without a change is a security liability — and our mobile service means we can meet a property owner or property manager on site without requiring them to shuttle keys across town. Whether it's a single door on a Witherspoon Street rowhouse or a full exterior audit on a larger property, our team handles it with the same care and precision.