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M

Magdalena Kosz

Head Officer·1 building·17 units
3.3

3 reviews

Highlights

1
Evictions
5
Litigation cases

About Magdalena Kosz

Magdalena Kosz is a poorly regarded head officer. Across their buildings, tenants rate them 3.3/5 across 3 reviews, with 34% recommending their buildings and 0% approving of them as an owner or associate. Their portfolio records 1 eviction, 40 open violations, and 5 litigation cases. Data last updated August 8, 2026. Associated with 1 building and 17 units across Manhattan, Magdalena Kosz is a Head Officer responsible for a portfolio that spans construction eras from the 1920s to the 1920s, reflecting multiple generations of development. The portfolio is concentrated in the All Upper West Side neighborhood in Manhattan. The building is primarily mid-rise. All of the associated buildings have rent-stabilized apartments. Prospective renters can find building-level ratings, reviews, and open-data records on the associated building pages.

Renter recommendations

-%

Renters recommend associated buildings

-%

Renters approve of this owner or associate

Review summary

Summarized from anonymous rental reviews on Openigloo.

Recent reviews for buildings managed by Magdalena Kosz indicate a growing concern about management quality and building conditions. Tenants appreciate the friendly neighbors and convenient locations but report significant issues with cleanliness, noise levels, and responsiveness from management. Complaints include inadequate pest control, delayed maintenance on broken fixtures, and persistent noise disturbances from nearby venues. Residents express frustration over unexpected fees and inconsistent service. While some commend the peaceful rooftop and spacious apartments, the overall sentiment suggests that improved management practices, timely responses, and better building upkeep are crucial for enhancing the tenant experience.

Reviews

Former tenant·just now

TOO LOUD MUSIC AND HIGH BASS

Pros

The location between the train lines 1/B/C and schools in the area. No bed bugs that I know of. I have a dishwasher.

Cons

No in-building washer/dryer. Packages are stolen from mail room. The club downstairs vibrates noise and bass into our apartments even after the soundproofing was installed. It wouldn’t be such a big deal if they didn’t blast the music on weeknights too. One cannot ever get a good night’s sleep here. The commercial air conditioners are also very loud. Don’t live in apartments B1, B2, B3, B4 if you value sleep. Last year, our heat didn’t turn on until late in the year. The super doesn’t clean up the building as often as he should. For instance, the neighbor kid peed in the foyer and it was never mopped up. There’s been sand and dead cockroaches on the stairs for a month. The front door lock to the building is broken and management refuses to the replace it. One time the lock fell out of the door and I had to pick it up before someone stole it. The building tries to recycle but I’ve seen them put all the recycle into regular trash bags. The pest control service comes very irregularly.

Advice to the owners

Prioritize the quality of life of your residents please. Stop the bar from vibrating music, turn on the heat on time, and keep the building clean.

Former tenant·Over 3 years ago

great building bad management

Pros

lovely neighbors, mix of long-term residents and columbia grad students. one apartment was written about in the new york times for hosting jazz events years ago. rooftop is very peaceful, heat works well, spacious rooms, good location near delis 99c stores, small grocery, park, pizza, restaurants.

Cons

The management company tried to illegally charge us an approx $500 administrative fee when we renewed our lease, we had to send a legal letter acknowledging this was illegal for them to stop pushing it. There were cockroaches that didnt go away even with multiple exterminations. At one point multiple doors literally broke in half, and there were huge cracks behind the counter in the kitchen, holes in the bathroom wall and stairs, that took at least 1 month sometimes more for the management to come. They did renovate our counter eventually. Building manager Celsa aggressively yelled at one of my roommates on the phone. We had to often go to her office to get prompt answers, and she often avoided us there too.

Advice to the owners

Respond promptly and respectfully. Don't increase the rent

Buildings associated with MAGDALENA KOSZ

  • 100 West  105 Street
    Rent-stabilized

    100 West 105 Street

    3.3(3)

    All Upper West Side

100 West  105 Street
Rent-stabilized

100 West 105 Street

3.3(3)

All Upper West Side

Building ratings

Cleanliness

-

Trash management

-

Pest control

-

Water pressure

-

Heat

-

Neighbors

-

Noise levels

-

Owner responsiveness

-

Cleanliness

-

Trash management

-

Pest control

-

Water pressure

-

Heat

-

Neighbors

-

Noise levels

-

Owner responsiveness

-

Rents and deposits

-

Renters received their security deposits back

-

Electronic rent payments

Open violations

From past 10 years · Updated 5 days ago

Average violations per unit for this owner or associate is worse than the city average.

Owner average2.35Violations per unit
NYC average0.81Violations per unit
18Class C
Immediately hazardous

Rodents, pest, mold, inadequate heat or hot water, defective building parts

18Class B
Hazardous

Smoke detector issues, inadequate lighting, no lighting for stairways

4Class A
Non-hazardous

No peephole on a door, no street number on the building, unlawful keeping of animals

0Class I
Missing info

Missing or non-compliant with administrative information orders or filings

FAQs

Magdalena Kosz has an average tenant rating of 3.3 out of 5 across 3 reviews.

Buildings managed by Magdalena Kosz average 2.35 open violations per unit, more than the citywide average of 0.81.

34% of tenants who reviewed buildings managed by Magdalena Kosz would recommend living there.

Magdalena Kosz has 5 housing court litigation cases across their portfolio.

Magdalena Kosz has 1 recorded eviction across their portfolio.

0% of tenants who reviewed a building managed by Magdalena Kosz approve of how it is run.

Magdalena Kosz has not appeared on the NYC worst landlords list.

Magdalena Kosz owns or manages 1 building totalling 17 units.

M

Magdalena Kosz

Head Officer·1 building·17 units
3.3

3 reviews

Follow us

For renters

Apartments for rent in NYCRenting tips and resourcesVerified apartment listings in NYCBuildings and owners in NYCOwners in NYCNYC market analysis reports

For landlords

iglooIQListings quality policy

Trending neighborhoods

Apartments in AstoriaApartments in Bedford-StuyvesantApartments in BushwickApartments in ChelseaApartments in Financial DistrictApartments in SohoApartments in Upper East SideApartments in Upper West SideApartments in West VillageApartments in Williamsburg

NYC boroughs

Apartments in BronxApartments in BrooklynApartments in ManhattanApartments in QueensApartments in Staten Island

2-bedroom apartments

2-bedroom apartments in Bronx2-bedroom apartments in Brooklyn2-bedroom apartments in Manhattan2-bedroom apartments in Queens2-bedroom apartments in Staten Island

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Legal

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© 2026 Openigloo Inc. All rights reserved.