What do tenants say about Christopher Karwowski?

Christopher Karwowski has an average tenant rating of 4.4 out of 5 across 2 reviews.

How many violations does Christopher Karwowski have across their portfolio?

Buildings managed by Christopher Karwowski average 0.28 open violations per unit, fewer than the citywide average of 0.81.

Would renters recommend buildings managed by Christopher Karwowski?

100% of tenants who reviewed buildings managed by Christopher Karwowski would recommend living there.

Is Christopher Karwowski responsive to tenants?

100% of tenants who reviewed a building managed by Christopher Karwowski approve of how it is run.

Has Christopher Karwowski had any litigation cases?

Christopher Karwowski has no housing court litigation cases across their portfolio.

Is Christopher Karwowski on the worst landlords list?

Christopher Karwowski has not appeared on the NYC worst landlords list.

How many buildings does Christopher Karwowski own or manage?

Christopher Karwowski owns or manages 4 buildings totalling 32 units.

Christopher Karwowski

Joint Owner·4 buildings·32 units

4.4

2 reviews

Highlights

Evictions

Litigation cases

About Christopher Karwowski

Christopher Karwowski is a mixed-profile joint owner. Across their buildings, tenants rate them 4.4/5 across 2 reviews, with 100% recommending their buildings and 100% approving of them as an owner or associate. Their portfolio records 2 evictions, 9 open violations, and 0 litigation cases. Data last updated September 8, 2026. Christopher Karwowski is a joint owner associated with 4 buildings and 32 units across Greenpoint in Brooklyn. The portfolio is concentrated in Greenpoint in Brooklyn. The buildings were built primarily in the 1920s and are mostly low-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

Reviews

Former tenant·Over 2 years ago

Great place to live

Pros

Cheap for greenpoint Great management company Building is well maintained When things break they are fixed quickly

Cons

McGuinness is loud

Advice to the owners

Keep up the good work :)

Former tenant·Over 3 years ago

Overall good experience.

Pros

- Very nice, family owned management company. - Promptly fixed things. - Hallways / commons spaces were cleaned regularly.

Cons

- McGuinness is noisy. - Packages got stolen a lot.

Buildings associated with CHRISTOPHER KARWOWSKI

Good cause

139 Mcguinness Boulevard

4.4(2)

Greenpoint

Good cause

648 Leonard Street

Greenpoint

Rent-stabilized

141 Guernsey Street

Greenpoint

Rent-stabilized

182 Freeman Street

Greenpoint

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 average0.28Violations per unit

NYC average0.81Violations per unit

3Class C

Immediately hazardous

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

3Class B

Hazardous

Smoke detector issues, inadequate lighting, no lighting for stairways

3Class 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