Park Slope: the entry is landmarked, the doorway is two doors deep
Row-house entries here have a stoop door, a vestibule and an inner door, and a large share of the facades are inside a historic district. Both facts decide where the panel can go.
Two doors, one of which you are allowed to touch
The standard Park Slope entrance runs stoop, outer door, vestibule, inner door. That is the defining install geometry from Sterling Place down through Union, Carroll, Montgomery Place, Berkeley and Garfield, and it is the thing that makes a Slope job different from a Queens two-family or a Manhattan lobby.
It matters because the outer door face is street-visible and, on most of these blocks, protected. The vestibule reveal behind it is not. So the low-friction answer is almost always to mount the panel on the vestibule jamb and lock the inner door. The trade-off, which we say before you sign anything, is that the outer stoop door then stays unlocked. If you want the outer door locked and a panel on the street face, that is a Landmarks application, not a mounting decision.
The second thing the geometry decides is anchoring. Brownstone spalls. You do not drill the face of a brownstone step or reveal if there is any alternative; you go into a mortar joint with a fastener that can be removed and the joint repointed. A stainless screw straight into the stone is a stain and a spall in three winters.
What the Landmarks Preservation Commission actually cares about
A large share of Park Slope’s row-house blocks sit inside the Park Slope Historic District, designated in 1973, or one of its later extensions. Check your address on the LPC map before you plan anything street-visible.
- It is about what can be seen from the street. Faceplates, camera housings, exterior readers, gooseneck posts, surface conduit and replacement entry-door hardware on a designated facade are all reviewable. If you are on a corner, the side elevation counts too.
- There are three permit routes, and they are not the same size of undertaking. A Certificate of No Effect and a Permit for Minor Work are staff-level reviews. A Certificate of Appropriateness goes to a public hearing. Most intercom and camera work is aimed at the first two, and how you draw it decides which one you land in.
- Surface conduit is what gets flagged. A discreet camera under a cornice is often survivable. A run of EMT stapled down the brownstone above it is not. Where we cannot get inside, we route through the cellar and out through an existing penetration rather than down the face.
- Landmarks approval is separate from Buildings. The LPC permit comes first and the DOB filing follows it. Nobody at the Commission is impressed by work that has already been done.
- Fourth Avenue is a different animal. The post-2005 rezoning towers along Fourth are not row houses and mostly not landmarked. Those are structured-cable buildings with elevators, garages and package rooms, quoted the way a new building is quoted.
Your four-unit brownstone is not covered by the intercom statute. It is covered by the door statute.
This gets muddled constantly, so here is the line. NY Multiple Dwelling Law §50-a requires an intercom with two-way voice and remote release from the apartment in Class A multiple dwellings erected or converted after 1 January 1968 with eight or more apartments. A brownstone built in 1890 and split into four units does not meet either test, so §50-a does not compel an intercom there.
What does apply is the self-closing door requirement. NYC Administrative Code §27-2041.1, added by Local Law 111 of 2019, and §28-315.10 require self-closing doors in residential buildings with three or more units. In a converted row house that means the vestibule door and the unit doors, and it is a routine inspection item. A closer that has been unscrewed because it slams is the most common single finding we see in a Slope conversion.
The practical consequence: if you are adding a buzzer or a video panel anyway, do the closer and the strike alignment in the same visit. It is the same door, the same trip, and half the cost of coming back.
The order that keeps you out of trouble
Survey and photograph the entry
Both doors, both jambs, the stoop, the cellar route, the existing bell wiring and the condition of the mortar joints. We photograph the facade as found, because that is the baseline anyone reviewing the work will compare against.
Decide street-visible or not
If the design can live inside the vestibule, we take that route and the Landmarks question largely disappears. If it cannot (because you want the stoop door locked, or the building is a multi-unit with a street-face panel already), we scope the LPC filing before quoting the hardware.
Written scope, then permits
You get the drawing and the fixed price first. Landmarks and, where required, Buildings filings follow, and the install date is set from the approval, not from our calendar.
Install and hand over
Cable labeled at both ends, joints repointed where we anchored, closer and strike adjusted, and admin credentials issued in the building’s name. You get the as-built drawing and the photographs.
Common questions
Do I need Landmarks approval to put a video intercom on my brownstone?
If any part of it is visible from the street, assume yes. That includes the faceplate, the camera, any exterior reader and any surface conduit or wiring on the facade. The Commission’s interest is in the visible elements, and on a corner building that includes the side elevation.
If the panel goes on the vestibule jamb behind the outer door and no cable is visible outside, most of that concern falls away. That is why we survey the vestibule first: the cheapest permit is the one you did not need. We are not attorneys and we do not file on your behalf without saying so; we scope what the filing has to cover and work with the architect or expediter the building already uses.
If I lock the outer stoop door, where does the panel go?
On the street face, which puts you into a Landmarks review, or on a free-standing post at the foot of the stoop, which is worse for review and worse for weather and vandalism. There is no clever third option, and anyone telling you otherwise has not filed one.
The honest trade-off most Slope owners land on: leave the outer door unlocked and closed on a spring hinge, lock the inner door on an electric strike, and put a camera covering the vestibule. You lose the ability to keep someone off the stoop; you keep the facade untouched and the permit simple.
Our building is a five-unit co-op with a single lobby. Who has to approve the work?
The board, under whatever alteration agreement the corporation uses, and that document is usually more demanding than the technical work. Expect a written scope, a drawing, and certificates of insurance naming the corporation and the managing agent from every trade that will be on site.
Realistic timelines for a small co-op are several weeks from first scope to approved start once the paperwork cycles, and longer if the board only sits monthly. We write the scope in the form the agent needs so it does not bounce, and we do not order hardware until it is approved.
Can you get a usable face from a camera at the top of the stoop?
Only if it is aimed at the right plane. A camera above the door looking down at the landing gets the top of a hat. The identification shot on a Park Slope stoop comes from a camera on the vestibule side of the inner door at roughly face height, or from a door station with the lens set at the panel rather than a separate camera above the frame.
Pixel density is what decides it, not megapixels. For a face you want on the order of 250 pixels per meter across the target, and the 2025 revision of the international standard pushes reliable identification of a person considerably higher than that, because 250 px/m falls apart under low light, motion and compression. On a stoop at night with one bulb overhead, that is the real constraint.
We are in South Slope / Windsor Terrace. Same rules?
Partly. The row-house geometry is the same and much of the same work applies, but the historic-district boundaries do not run all the way through, so the Landmarks question is address by address rather than neighborhood-wide.
The other difference is stock: more two- and three-family houses with a separate garden-level entrance under the stoop, which usually means a second door station and a credential the owner can revoke at turnover without touching their own.
Work that usually comes with this
Intercom Installation
New audio or video entry systems, wired or IP, sized to the building.
Video Intercom Systems
See who's at the door: lobby panels with cameras, in-unit monitors and phone apps.
Door Buzzer Systems
Buzz-in entry for walk-ups, storefronts, offices and back-of-house doors.
Security Camera Installation
New IP camera systems for buildings, storefronts, offices and homes.
Access Control Installation
Complete door-control systems, from a single door to a multi-building portfolio.
Send us a photo of the entry.
Two photographs (the stoop from the sidewalk and the vestibule from inside) tell us most of what we need to know about a Park Slope job before we get there.
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