808 Carroll Street, Brooklyn

A 19th-century Park Slope rowhouse held by one family since 1976, where street-level infrastructure dominates the surrounding picture.

A two-family Park Slope rowhouse built in 1892 that has stayed in the same family line for half a century. With only two units, evaluation relies heavily on block-level utilities and physical proximity to neighborhood systems. Three things to know:

Underground water infrastructure sees frequent emergency calls nearby. Within three blocks of the house, street water system calls hit 86 over the last 12 months, including 28 reports of possible water main breaks and 18 emergency hydrant calls. This indicates heavy utility stress on the surrounding street mains rather than internal pipe friction.

Surrounding blocks logged recurring indoor air quality complaints. 5 indoor air quality complaints were logged within three blocks, with the most recent filed July 23, 2026. Airborne fumes or venting issues around small residential blocks typically trace to commercial exhaust or shared mechanical risers that aren't obvious until move-in.

Half a century under continuous family ownership. Deed and mortgage transfers trace back under the same family name to 1976, reflecting 50 years of single-family stewardship rather than recent investor flips.

Quieter signals on this building and the blocks around it:

• 199 illegal parking complaints within three blocks in the last 12 months, mostly hydrant and crosswalk blockages.
• 85 damaged tree calls within three blocks over the past year, primarily falling branches.

808 Carroll Street is a two-family home in Brooklyn, New York City (BBL 3010710011). This building is associated with Welch, John G.. Brix does not yet have a current violation read for this property (not enough recent data), along with inspection history, DOB filings, tenant complaints, and rent stabilization status.

Built in 1892, this two-family home sits in Brooklyn and is tracked by Brix using public NYC records from HPD, DOB, ACRIS, and 311.

The building last changed hands on June 6, 2019 for $200,000, according to recorded deeds.

Brix score: 100/100. View the Building Report on Brix.

See every NYC building owned by Welch, John G. on the landlord portfolio page.