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J

Jonsir Realty Llc

Corporate Owner·1 building·66 units
3.5

7 reviews

Highlights

1
Evictions
2
Litigation cases

About Jonsir Realty Llc

Jonsir Realty Llc is a mixed-profile corporate owner. Across their buildings, tenants rate them 3.5/5 across 7 reviews, with 58% recommending their buildings and 58% approving of them as an owner or associate. Their portfolio records 1 eviction, 1 open violation, and 2 litigation cases. Data last updated July 30, 2026. Across Lenox Hill in Manhattan, Jonsir Realty LLC is a corporate owner associated with 1 building and 66 units. The portfolio is concentrated in Lenox Hill in Manhattan. The building was constructed in 1936, making it a product of its era with historical significance. The building is primarily mid-rise. 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.

Tenant feedback for JONSIR REALTY LLC buildings reveals a mixed experience largely influenced by management quality. While many residents praise cleanliness, attentive staff, and a pleasant community ambiance, persistent issues regarding pest control, owner responsiveness, and noise transmission through thin floors are common concerns. Some tenants noted poor package management and maintenance delays, which can detract from the overall comfort. Recommendations include improved pest management and more active owner involvement to enhance tenant satisfaction. Despite management issues, several residents still endorse the buildings for their prime locations and community spirit.

Reviews

Former tenant·just now

Good building bad management

Pros

Units are great the tenants are awesome and the building common areas are usually very clean

Cons

building super does not answer the phone/ is not a huge help (takes multiple asks and times to do anything correctly), package management is poor you can almost expect packages to get stolen, the floors and ceilings and paper thin. Cockroaches have become a problem and the response is lacking. Landlord tries to raise every non stablized unit (not many) the absolute maximum he can every year, does not negotiate and is difficult to work with.

Advice to the owners

Instill better supers, work with your tenants and address the problems they raise

Former tenant·Over 1 year ago

Good no thrills building but floors stop no sound

Pros

Super keeps building and sidewalk clean, nice people

Cons

The floors are so incredibly bad at preventing noise from above. When people come over, they say they’ve never heard anything like this Street noise is very loud, even in back facing apartments. It’s all concrete behind the building I think the honks echo through there, never had this issue in other UES apts

Advice to the owners

Enforce rugs as mentioned in lease

Buildings associated with JONSIR REALTY LLC

  • 310 East 75 Street
    Rent-stabilized

    310 East 75 Street

    3.5(7)

    Lenox Hill

310 East 75 Street
Rent-stabilized

310 East 75 Street

3.5(7)

Lenox Hill

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 better than the city average.

Owner average0.01Violations per unit
NYC average0.81Violations per unit
1Class C
Immediately hazardous

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

0Class B
Hazardous

Smoke detector issues, inadequate lighting, no lighting for stairways

0Class 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

Jonsir Realty LLC has an average tenant rating of 3.5 out of 5 across 7 reviews.

Buildings managed by Jonsir Realty LLC average 0.01 open violations per unit, fewer than the citywide average of 0.81.

58% of tenants who reviewed buildings managed by Jonsir Realty LLC would recommend living there.

Jonsir Realty LLC has not appeared on the NYC worst landlords list.

Jonsir Realty LLC has 1 recorded eviction across their portfolio.

Jonsir Realty LLC has 2 housing court litigation cases across their portfolio.

58% of tenants who reviewed a building managed by Jonsir Realty LLC approve of how it is run.

Jonsir Realty LLC owns or manages 1 building totalling 66 units.

J

Jonsir Realty Llc

Corporate Owner·1 building·66 units
3.5

7 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

Support

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© 2026 Openigloo Inc. All rights reserved.