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William Demos

Corporate Owner·16 buildings·323 units
3.6

29 reviews

Highlights

19
Evictions
16
Litigation cases

About William Demos

William Demos is a mixed-profile corporate owner. Across their buildings, tenants rate them 3.6/5 across 29 reviews, with 73% recommending their buildings and 69% approving of them as an owner or associate. Their portfolio records 19 evictions, 110 open violations, and 16 litigation cases. Data last updated October 24, 2026. William Demos is a corporate owner associated with 16 buildings and 323 units across Manhattan, Brooklyn, and Queens. The portfolio spans multiple neighborhoods including West Village, Sunset Park, Cobble Hill, Flushing, Elmhurst, Astoria, Jackson Heights, and Murray Hill. The buildings were built over a wide range from 1845 to 2010, reflecting multiple generations of development. The buildings are primarily mid-rise. A majority 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

Building photos

Review summary

Summarized from anonymous rental reviews on Openigloo.

Recent tenant reviews for buildings managed by William Demos indicate a mix of positive and negative experiences. The responsiveness of the super and overall management is appreciated, with many residents praising the staff's attentiveness. However, significant concerns about pest infestations, particularly cockroaches, have been frequently mentioned. Additionally, cleanliness varies, and noise levels can be an issue. While some apartments feature good amenities and locations, consistent maintenance challenges and owner responsiveness problems were highlighted. Overall, prospective renters should weigh the charming locales against the highlighted maintenance and pest control issues before committing.

Reviews

Former tenant·1 minute ago

One year review

Pros

It has its charm, and the super was pretty responsive but it was a somewhat uncomfortable place to live.

Cons

Stairwell tiny and dingy so you can’t fit anything larger than a futon when moving in and out. Lots of homeless on the street out front. Thin walls so can hear people in the stairwell and outside very clearly. The super got into a fight with my movers when I moved out which was weird.

Former tenant·9 minutes ago

Overall, amazing actually

Pros

- Pedro our super. He's wonderful, feels like family. He is so helpful and on top of everything. Also he is kind and has amazing energy-we are truly lucky to have him. - location wow - elevator and laundry - cute apartments. exposed brick, strong bones - we rarely hear any neighbors.

Cons

The only thing I would say is there are pests (just cockroaches but still) in the warmer months, it is somewhat manageable but also gross unfortunately. The funny thing is, the pros still outweigh the cons.

Buildings associated with WILLIAM DEMOS

  • 9 Cornelia Street
    Good cause

    9 Cornelia Street

    West Village

  • 507 62 Street
    Good cause

    507 62 Street

    Sunset Park

  • 6123 5 Avenue
    Rent-stabilized

    6123 5 Avenue

    Sunset Park

  • 41-39 Elbertson Street
    Rent-stabilized

    41-39 Elbertson Street

    Elmhurst

9 Cornelia Street
Good cause

9 Cornelia Street

West Village

507 62 Street
Good cause

507 62 Street

Sunset Park

6123 5 Avenue
Rent-stabilized

6123 5 Avenue

Sunset Park

41-39 Elbertson Street
Rent-stabilized

41-39 Elbertson Street

Elmhurst

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 average0.34Violations per unit
NYC average0.81Violations per unit
29Class C
Immediately hazardous

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

57Class B
Hazardous

Smoke detector issues, inadequate lighting, no lighting for stairways

18Class A
Non-hazardous

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

6Class I
Missing info

Missing or non-compliant with administrative information orders or filings

FAQs

William Demos has an average tenant rating of 3.6 out of 5 across 29 reviews.

Buildings managed by William Demos average 0.34 open violations per unit, fewer than the citywide average of 0.81.

73% of tenants who reviewed buildings managed by William Demos would recommend living there.

William Demos owns or manages 16 buildings totalling 323 units.

William Demos has 19 recorded evictions across their portfolio.

69% of tenants who reviewed a building managed by William Demos approve of how it is run.

William Demos has not appeared on the NYC worst landlords list.

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William Demos

Corporate Owner·16 buildings·323 units
3.6

29 reviews

Follow us

For renters

Apartments for rent in NYCRenting tips and resourcesNYC rental market guidesVerified 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

Terms of usePrivacy policyCommunity guidelinesAgency disclosureFair housing disclosureStandard operating procedures
© 2026 Openigloo Inc. All rights reserved.