If you own rental property in New York City, you’ve probably had a tenant damage something trying to install it themselves. Maybe it was a window AC unit left unsupported on a sill. Maybe it was a TV mount with stripped anchors pulling drywall off the wall. Maybe it was curtain rod brackets drilled into plaster that crumbled and took a chunk of historic wall with them. In every one of these cases, you — the landlord — end up writing the repair check. Here are the five items every NYC landlord should have professionally installed before a tenant ever moves in.

1. Window Air Conditioning Units

Window AC units are the single most dangerous DIY installation in a New York City apartment building. An improperly supported sixty-pound unit falling from a fourth-floor window is a liability nightmare — and it happens every summer in this city. NYC building codes require exterior support brackets for most window AC installations, and many co-ops and condos require landlord-approved installation with documentation before a tenant can use one at all.

If you provide the units as part of the rental, have them installed professionally before the lease starts. If tenants bring their own units, include clear language in your lease requiring approved installation methods, a proper exterior support bracket, and written notification to building management. The cost of professional installation — typically $125 to $200 per unit in NYC — is trivial compared to the cost of a personal injury lawsuit, a smashed car on the street below, or a $3,000 window frame replacement in a pre-war building.

2. TV Mounts and Wall-Mounted Electronics

TV mounting is the second most common source of wall damage in NYC rental apartments. A tenant who mounts a 65-inch TV into drywall without locating studs, or who drills into plaster without understanding the wall structure behind it, can pull a section of wall off entirely when the mount shifts under load. In pre-war buildings with plaster-over-lath walls — common throughout Manhattan, Brooklyn Heights, and Park Slope — incorrect drilling causes crack damage that radiates far beyond the original holes and can cost $500 to $2,000 to repair properly.

Professionally installed TV mounts are anchored into studs or reinforced with properly rated hollow-wall hardware. They hold the TV securely, leave no collateral damage, and present a clean, finished look that adds perceived value to the apartment. Many NYC landlords now include a pre-installed TV mounting bracket as a standard amenity — it’s a selling point that can support higher asking rent and virtually eliminates the risk of a tenant drilling their own poorly placed holes.

3. Curtain Rods and Window Treatments

Curtain rod brackets seem simple but are among the most frequently botched installations in rental apartments. Brackets screwed into plaster without the right anchors will pull out under the weight of heavy blackout curtains or thermal drapes, often taking chunks of plaster with them. In older NYC apartments with original plaster window surrounds and molding, this kind of damage is expensive to restore authentically — skilled plaster restoration in New York City runs $80 to $150 per hour.

Professional installation ensures brackets are anchored into the window casing, into structural points in the surrounding wall, or into the window frame itself — using hardware that can support the full weight of whatever window treatment the tenant chooses. It’s fast, inexpensive, and eliminates one of the most common sources of security deposit disputes between NYC landlords and departing tenants.

4. Shelving and Wall-Mounted Storage

Floating shelves, bathroom medicine cabinets, kitchen shelving racks, and pantry organizers are items tenants frequently try to install themselves — and frequently get wrong. A shelf loaded with books anchored into plaster with short drywall screws will eventually fail. In a worst-case scenario, it falls on a person. More commonly, it falls on flooring, appliances, or other tenant property, creating a liability dispute you don’t want to navigate.

Professionally installed shelving is anchored into studs or masonry with hardware rated for the intended load. For NYC apartments with brick interior walls — common in loft conversions in Dumbo, the Meatpacking District, and parts of the Bronx — masonry anchors are required, and most tenants don’t know how to use them safely. Pre-installed shelving gives tenants functional storage from move-in day and prevents improvised installations that damage your walls.

5. Furniture Assembly for Furnished Rentals

If you rent furnished apartments — increasingly common in New York City’s short-term, corporate, and transitional housing market — professional furniture assembly is not optional. Flat-pack furniture assembled incorrectly has loose joints, stripped hardware, and structural weaknesses that cause failures under normal use. A bed frame that collapses, a shelving unit that tips over, or a dining chair that fails creates injury risk and replacement costs that far exceed the original assembly fee.

Professional assembly also extends the lifespan of your furniture inventory. Correctly torqued fasteners stay tight through multiple tenant cycles. Improperly assembled joints loosen with every use, eventually failing — meaning you’re replacing expensive pieces far sooner than necessary. For landlords managing furnished inventory across multiple units in a NYC building, professional assembly is a straightforward operational investment.

The Real Cost of Skipping Professional Installation

The math is simple. Professional installation for all five of these items in a standard NYC one-bedroom apartment typically runs $400 to $800 depending on scope. Compare that to patching and repainting plaster walls ($200 to $500 per damaged section), replacing a window frame damaged by an unsupported AC unit ($1,500 to $3,000 in a pre-war building), or managing a personal injury claim from a falling unit or shelf. Landlords who invest in professional installation at the start of a tenancy spend less on repairs, avoid more disputes, and deal with fewer emergencies over the life of each lease.

Ready to set up your NYC rental property the right way? Book a consultation with Picture Perfect Mounting at pictureperfectmounting.com.