What are the fire and egress rules for locks on a Brooklyn multifamily building?

Brooklyn multifamily buildings - prewar walk-ups, converted brownstones, loft buildings in Bushwick, co-ops in Brooklyn Heights - all fall under New York City's fire and egress code rules for locks and doors. The short answer: any lock on a door that serves as a means of egress must allow free exit without a key, special knowledge, or effort. That rule shapes nearly every lock and hardware decision in a multifamily building.

What does NYC egress code actually require for lock hardware in a multifamily building?

The NYC Building Code, enforced by the DOB, requires that all doors along a means of egress open from the inside with a single motion and without a key. That means a standard knob lock on a stairwell door is a violation. Lever handle hardware is required on most commercial and multifamily interior doors because levers meet accessibility standards and are easier to operate under panic conditions.

On ground-floor exit doors and cellar exits, you will typically see a panic bar or crash bar - technically called an exit device. The Von Duprin 98/99 series and the Dorma ED2000 are workhorses on Brooklyn commercial exit doors. A push on the bar releases the latch with no key, no twist, no grip strength. That single-motion rule is the foundation of egress compliance.

The double cylinder deadbolt is the most common code violation we find in older Brooklyn buildings. Building owners or previous tenants install them on ground-floor apartment doors and vestibule doors for security reasons. The problem: they require a key to exit, which is prohibited on any door serving as a means of egress. If your building has them anywhere in the egress path, remove them. Single-cylinder deadbolts with a thumb-turn are the compliant replacement.

Self-closing hinges are a related requirement. Fire-rated stairwell doors must be self-closing to limit fire and smoke spread. Norton 7500 series and LCN 4040XP door closers are standard choices. If tenants are propping these doors open, the building owner is exposed to liability and DOB violations.

How do electromagnetic locks, delayed egress, and access control systems fit into Brooklyn multifamily buildings?

Many Park Slope brownstones and Crown Heights multifamily buildings have updated their front entry systems with electromagnetic locks paired with intercom and buzzer entry systems. An electromagnetic lock holds the door magnetically and releases when the buzzer is triggered or when an authorized credential is presented. They are common on vestibule doors.

The code requirement for an electromagnetic lock on an egress door is that it must be fail-safe. Fail-safe means the lock releases when power is lost. In a fire, the alarm system cuts power to the mag lock and the door opens freely. A fail-secure lock, which stays locked during a power failure, is generally prohibited on egress paths in multifamily occupancies. This distinction matters enormously when specifying hardware.

Electromagnetic locks on egress doors also require a request to exit sensor, often called an REX. The REX detects motion on the egress side and releases the lock before a person reaches the door. Combining a mag lock with an intercom code entry system and a proper REX sensor keeps the building secure on entry while meeting egress requirements on exit. The Securitron M62 and Rutherford Controls RCI 8A are common mag lock choices for this application.

Delayed egress is a specific code provision that allows a lock to hold an egress door for up to 15 seconds after the release mechanism is activated. It is not available in all occupancy types, and in NYC multifamily buildings it requires DOB approval. It is more commonly seen in certain commercial and institutional settings. If someone is selling you a delayed egress system for a standard walk-up apartment building, ask to see the code reference and the permit.

What are the lock and door compliance rules for Brooklyn storefronts and commercial buildings?

Commercial occupancies in Williamsburg and Bay Ridge face a different set of requirements than residential buildings, though the core egress principle is the same. Any commercial exit door with an occupancy load above a certain threshold must have a listed exit device - a panic bar or crash bar that meets ANSI/BHMA A156.3 standards. The Von Duprin 35A and Falcon 19 series are common on single-door commercial exits across Brooklyn.

Roll-down security gates are standard on Brooklyn storefronts. If the gate covers a means of egress, it must have an opening that allows egress without a key during business hours, or it must not be locked from the outside while the space is occupied. A roll-down gate permit from the DOB is required for new installations, and the gate type and egress provisions are part of that approval. Unlicensed gate installations without permits create problems at sale, lease renewal, and after any incident.

Storefront doors with access control, including magnetic locks tied to a buzzer or credential reader, must meet the same fail-safe and request-to-exit requirements as residential egress doors. Adding a Schlage CO-200 or an LKS-compatible access control reader to a commercial door does not eliminate the egress obligation - it adds a layer on top of it. The exit function must always work independently of the access control system.

If you are unsure whether your building's current hardware is compliant, the best move is a hands-on inspection by someone who knows both the hardware and the code. Call Brooklyn Locksmith & Doors at (347) 357-0985 to schedule a walk-through of your building, storefront, or gate setup. We work across all of Brooklyn and can tell you exactly what needs to change before the DOB tells you first.

Frequently asked questions

Are double cylinder deadbolts legal in Brooklyn apartments?

Double cylinder deadbolts - the kind that require a key on both sides - are prohibited on apartment entry doors and any door in a means of egress in NYC multifamily buildings. They trap occupants during a fire. Single cylinder with a thumb-turn is the code-compliant option.

Can a landlord change the locks on a tenant in Brooklyn?

No. In New York, a landlord cannot change locks on a tenant without a court order. Lock change rights belong to the tenant during their tenancy. A landlord who does this faces serious legal exposure. Tenants locked out by a landlord should call 911 and document everything.

Do I need a permit for a roll-down gate on my Brooklyn storefront?

Yes. The NYC Department of Buildings requires a roll-down gate permit for new gate installations on commercial storefronts. Gates on means of egress paths also have specific code requirements about how they open and whether they can be locked from outside during business hours.