If you could only install one lock on a prewar walk-up on the Upper West Side, what would it be?

The best single lock for a prewar walk-up on the Upper West Side is a Medeco Maxum single cylinder deadbolt. It is a grade 1 deadbolt with a high-security cylinder, anti-pick pins, and a drill-resistant body. The hardware sits at a moderate price point before installation. Nothing else in that form factor gives you more real-world protection on a New York City door.

Why does the Medeco Maxum beat every other deadbolt for this building type?

Prewar walk-ups on Amsterdam Avenue and across Morningside Heights share a few specific problems. The door frames are old. The strike plates are often the builder-grade one-screw type that came with the building in 1925. And the hallways are semi-public, which means a lock faces opportunistic picking, bumping, and kick-ins more than in a doorman building.

The Medeco Maxum addresses all three threats directly. The cylinder uses rotating and lifting pins that defeat standard picks and bump keys. That makes it both a pick-resistant and bump-proof lock in a single unit. The bolt is hardened steel. The body resists drill attacks better than a standard Schlage B60N or Kwikset SmartKey cylinder, both of which are decent locks but not built for this level of exposure.

A Schlage B60N is a solid grade 1 deadbolt and a legitimate upgrade over a grade 2 deadbolt or a rim lock. It is what most locksmiths install when budget is the first question, and it sits at a very affordable price point. The Kwikset SmartKey line runs similarly affordable and offers easy rekeying, but the SmartKey cylinder has a documented vulnerability to bypass attacks that rules it out as a primary lock on a street-level or low-floor door in Manhattan Valley or Lincoln Square.

The Medeco Maxum costs more, but the cylinder alone is what you are paying for. It is the same high-security cylinder technology used in commercial applications. On a prewar door in the Upper West Side, that cylinder is the difference between a lock a burglar skips and one he attempts.

What about smart locks or keypad deadbolts for an Upper West Side co-op or condo?

Smart locks are a real conversation in co-ops and condos along Central Park West and West End Avenue, where residents want keyless entry and remote access. The honest answer is that a Lockly Secure Pro or a comparable smart deadbolt with a grade 1 bolt is mechanically sound. Lockly uses a pin-genie randomized keypad that defeats shoulder-surfing and the internal cylinder includes anti-pick pins.

But a smart deadbolt is not the single best lock for a prewar walk-up. Here is why. Battery failure locks you out. Firmware vulnerabilities are a real attack surface. And most co-op boards in the Upper West Side require board approval before you alter the entry door hardware, which adds a step that can restrict your options to specific models.

If you are in a newer condo in Lincoln Square or a renovated brownstone in Morningside Heights where the door frame is solid and the building rules allow it, a Lockly paired with a reinforced strike plate using 3-inch screws is a strong setup. But it is a secondary choice. The Medeco Maxum does not need batteries and does not have firmware.

One scenario where a keypad deadbolt wins outright: short-term rental units or small business back offices in Manhattan Valley where frequent rekeying would otherwise be constant. In that case, a smart deadbolt eliminates the rekeying cost entirely and that math changes the answer.

Are there situations where a Mul-T-Lock MT5+ or double cylinder deadbolt makes more sense?

Yes, two specific situations.

First, if the door has a large glass panel near the lock, a double cylinder deadbolt is the right call. A single cylinder deadbolt can be defeated by breaking the glass, reaching in, and turning the thumb turn. A double cylinder deadbolt requires a key on both sides and removes that attack path entirely. The Schlage B62N is the standard double cylinder version of the B60N and sits at a similarly affordable price point. For a higher-security version, Medeco makes a double cylinder Maxum as well.

Note: double cylinder deadbolts are a fire safety concern if occupants cannot quickly locate the interior key during an emergency. This is a real tradeoff and building codes in New York City govern where they are permitted. A licensed locksmith will tell you before installing one whether it is code-compliant for your specific door.

Second, commercial storefronts on Amsterdam Avenue or side streets in the Upper West Side benefit from the Mul-T-Lock MT5+. It is a high-security cylinder with telescopic pins that make it one of the most pick-resistant cylinders available. Keys are patent-protected, which means no unauthorized duplication at a hardware store. For a storefront that closes at night in a high-foot-traffic corridor, the MT5+ cylinder set into a grade 1 deadbolt body is the professional standard.

The MT5+ is priced meaningfully higher than the Medeco Maxum, with the cylinder alone representing a significant investment before installation. For a residential prewar walk-up, that premium over the Medeco Maxum is hard to justify. For a business protecting inventory, it is not.

If you are on the Upper West Side or anywhere in Manhattan and want a straight answer about what lock fits your specific door, call Amsterdam Locksmith at (917) 200-2978. We work on prewar apartments, brownstones, co-ops, condos, and storefronts across the neighborhood and can usually get to you the same day.

Frequently asked questions

What is the difference between a grade 1 and grade 2 deadbolt?

A grade 1 deadbolt meets the highest ANSI security rating and resists more force, more pick attempts, and more kick-ins than a grade 2 deadbolt. For a front door on a prewar walk-up or brownstone, always choose grade 1. Grade 2 is acceptable for interior or secondary doors only.

Is a smart deadbolt as secure as a traditional high-security deadbolt?

A quality smart deadbolt like the Lockly Secure Pro uses a grade 1 bolt and anti-pick pins, so the mechanical security is solid. The tradeoff is battery dependence and a larger attack surface if the firmware is outdated. For most Upper West Side apartments, pairing a smart deadbolt with a reinforced strike plate closes most of that gap.

Can Amsterdam Locksmith install a Medeco or Mul-T-Lock on my door today?

Yes. Amsterdam Locksmith stocks and installs Medeco, Mul-T-Lock MT5+, Schlage, and Lockly locks throughout the Upper West Side, Morningside Heights, and all of Manhattan. Call (917) 200-2978 to schedule same-day or next-day service.