What do tenants say about John Sismanoglou?

John Sismanoglou has an average tenant rating of 2.8 out of 5 across 11 reviews.

How many violations does John Sismanoglou have across their portfolio?

Buildings managed by John Sismanoglou average 0.63 open violations per unit, fewer than the citywide average of 0.81.

Would renters recommend buildings managed by John Sismanoglou?

37% of tenants who reviewed buildings managed by John Sismanoglou would recommend living there.

Is John Sismanoglou responsive to tenants?

28% of tenants who reviewed a building managed by John Sismanoglou approve of how it is run.

Is John Sismanoglou on the worst landlords list?

John Sismanoglou has not appeared on the NYC worst landlords list.

Has John Sismanoglou had any litigation cases?

John Sismanoglou has 80 housing court litigation cases across their portfolio.

Has John Sismanoglou had any evictions?

John Sismanoglou has 26 recorded evictions across their portfolio.

How many buildings does John Sismanoglou own or manage?

John Sismanoglou owns or manages 24 buildings totalling 521 units.

John Sismanoglou

Shareholder·24 buildings·521 units

2.8

11 reviews

Highlights

Evictions

Litigation cases

About John Sismanoglou

John Sismanoglou is a modestly rated but responsible shareholder. Across their buildings, tenants rate them 2.8/5 across 11 reviews, with 37% recommending their buildings and 28% approving of them as an owner or associate. Their portfolio records 26 evictions, 333 open violations, and 80 litigation cases. Data last updated September 5, 2026. Across the Upper West Side, Corona, South Harlem, Central Harlem, Astoria, Kingsbridge Heights, and Hamilton Heights in Manhattan, Queens, The Bronx, and Brooklyn, John Sismanoglou is a shareholder associated with 24 buildings and 521 units. The portfolio spans multiple neighborhoods across these boroughs. The buildings were constructed during a wide range of years, spanning from the 1900s to the 1990s. The portfolio consists primarily of mid-rise buildings. All of the associated buildings have rent-stabilized apartments. Building-level ratings, reviews, and open-data records are available 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 tenant feedback on buildings managed by John Sismanoglou reveals a stark contrast in management quality across properties. Some buildings boast clean, light-filled lobbies, good security, and responsive management, earning appreciation for quiet neighborhoods and convenient locations. However, a significant number of reviews highlight serious issues including poor cleanliness, inadequate garbage handling, pest infestations, unreliable heating, and slow or unhelpful owner responsiveness. Several tenants describe neglect and subpar maintenance, with complaints about intrusive surveillance and unresolved safety concerns. Prospective renters should expect considerable variation in living conditions, with some buildings well-maintained while others suffer from neglect and require urgent managerial improvements.

Reviews

Former tenant·22 minutes ago

Beautiful building and location

Pros

A lots of light, large lobby and hallways. Exposed brick walls and large windows.

Cons

Area is windy in general

Former tenant·10 minutes ago

Treating the heat like some sort of torture machine

Pros

Really quiet street. Sweet neighborhood.

Cons

They turn the heat off at night and then on in the morning briefly and then off all day. I'm not sure, are they trying to get people to move out? Hmmm... For real though, it's november and they are playing with the temperature in a way that does not seem legal.