If you could only install one lock on a brownstone on the Upper West Side, what would it be?

If I had one lock to put on a brownstone entry door on the Upper West Side, I would install a Medeco Maxum single cylinder deadbolt with a reinforced strike plate. Full stop. This lock earns that answer because it combines a high-security cylinder, a restricted key control system, and an ANSI Grade 1 rating in one unit. For a four-story brownstone on a block between Amsterdam Avenue and Broadway, that combination matters more than any single feature alone.

Why does the lock I pick for a brownstone differ from what I'd put on a co-op or storefront?

A brownstone has a street-level entry door that takes real abuse. Delivery traffic, multiple residents, and a front door that often sits flush to the sidewalk mean the lock faces both physical attacks and a high volume of key copies floating around the neighborhood. A co-op in a Lincoln Square building typically has a doorman as a first layer of defense. A Morningside Heights storefront needs a different solution entirely, often a heavy-duty mortise lock or a jimmy-proof deadbolt on a steel gate. The brownstone gets none of those buffers.

That is why I keep coming back to the Medeco Maxum for this specific property type. The cylinder is pick-resistant and drill-resistant. The keys are patented, so a hardware store on Columbus Avenue cannot copy them without written authorization. That key control feature alone eliminates one of the most common ways brownstone units get compromised: a former tenant, contractor, or ex-partner who kept a key.

For a budget-conscious owner who cannot stretch to Medeco pricing, the Mul-T-Lock MT5+ is my second choice. It uses a telescoping pin system that defeats most picking and bumping attempts. Restricted key duplication is also built into the system. The Mul-T-Lock MT5+ comes in at a more affordable price point than the Medeco Maxum, though both are a significant step above a standard Schlage B60N or Kwikset 980, which are solid ANSI Grade 1 locks but use conventional cylinders that locksmiths and skilled amateurs can defeat with basic tools.

Does the strike plate and door frame matter as much as the lock itself?

Yes, and most homeowners underestimate this. A pricey Medeco Maxum installed into a rotting wood frame with a two-screw strike plate is less secure than a more affordable Schlage B60N set into a steel-reinforced frame with a four-screw, box-style strike plate and 3-inch screws going into the stud. The lock is only as strong as what it is bolted into.

Brownstones in Manhattan Valley and Morningside Heights often have original 1890s door frames. The wood is dense and beautiful, but decades of paint, moisture, and settlement can hollow out the area around the strike plate pocket. When I do a lock change on these buildings, I always probe the frame before I quote a price. Door reinforcement, meaning a steel wrap plate around the jamb, adds a moderate cost to the job but it is not optional on a compromised frame.

The same principle applies to the door itself. A hollow-core door with a high-security cylinder is still a hollow-core door. A solid wood or steel-core door with a mid-range lock like the Schlage B62N double cylinder deadbolt is the stronger setup if the glass or panel situation calls for a double cylinder. The hardware is one piece of a system.

Should I consider a smart lock or keep it traditional for a brownstone entry?

Smart locks are a legitimate option, but they work better as a second layer than as the primary security device on a street-level brownstone door. I have installed Lockly, August, and Yale smart deadbolts on Upper West Side properties, and they all do what they advertise. The August smart deadbolt is a popular choice because it retrofits onto your existing deadbolt thumb turn, so you keep your current keyed cylinder and just add app and auto-lock functionality. The Yale Assure line offers a clean keypad deadbolt that meets ANSI Grade 2 standards, which is acceptable for an interior unit door but lighter than what I want on a front entry.

The problem with relying solely on a smart deadbolt for a brownstone front door is the attack surface expands. You now have a battery, firmware, a Bluetooth or Wi-Fi radio, and an app to keep updated. A Kwikset SmartKey-based smart lock is convenient for rekeying, but the SmartKey cylinder has shown vulnerabilities under certain bypass techniques that a Medeco cylinder simply does not have. Convenience and security can be balanced, but on the primary entry of a street-facing brownstone, I push the security weight higher.

My practical recommendation for a brownstone owner in Lincoln Square or on Amsterdam Avenue who wants both: install the Medeco Maxum as your primary deadbolt, and add an August smart deadbolt on the interior thumb turn side. You get restricted key control, a hardened cylinder, and the convenience of remote access and auto-lock. The combined hardware cost is higher than either product alone, and installation including strike plate reinforcement will vary depending on frame condition.

If you own a brownstone or a walk-up apartment and want a straight answer about which lock fits your specific door, call Amsterdam Locksmith at (917) 200-2978. We work on the Upper West Side and Amsterdam Avenue every day, and we can tell you within five minutes of looking at your door whether the Medeco Maxum is the right call or whether something else fits better.

Frequently asked questions

What is the difference between a single cylinder and double cylinder deadbolt for a brownstone?

A single cylinder deadbolt locks and unlocks with a key outside and a thumb turn inside. A double cylinder deadbolt requires a key on both sides, which slows exit in a fire but adds security where a door has glass panels near the lock. For most Upper West Side brownstone entry doors without glass, a single cylinder is the right call.

How much does it cost to install a high-security lock on the Upper West Side?

High-security lock hardware varies in price depending on the brand and model, with professional installation adding to the total. A Medeco Maxum or Mul-T-Lock MT5+ with a reinforced strike plate installation is a meaningful investment, and frame condition can push the cost higher.

Can I rekey a Medeco or Mul-T-Lock myself?

No. Both Medeco and Mul-T-Lock MT5+ use patented, restricted key systems. Rekeying requires a licensed locksmith with the correct equipment and authorization. This key control feature is a core reason these locks are worth the investment in a dense urban environment like Manhattan.