Buying in Gowanus: the questions with sourced answers
Each answer is built from Gowanus’s own rows in public data — the Census, NYSDOH, NYSDEC, FEMA, the office that holds the permits — or from Lou’s reports, and cites its source. Data retrieved 1 November 2026.
How old are the houses in Gowanus?
Median year built in zip 11215: 1938 (Brooklyn: 1943). Of 32,197 units, 71% predates 1940; 10% is from 2000 on. Next come the 2000s at 5% and the 1940s at 5%. An older house is not a worse house, but its wiring, plumbing and roof were installed under different rules and replaced piecemeal, which is what the inspection looks for. Lou’s reports here: 117 years old. (ACS)
How are homes in Gowanus heated? Is an oil tank likely?
72% utility gas, 13% electricity; fuel oil 9% against 7% county-wide. NYSDEC logs Brooklyn home oil spills under the borough, not Gowanus. A gas conversion can leave a tank behind. An abandoned tank is most likely in a house that was converted from oil. Buried tanks are outside the standards New York sets for a home inspection, so the seller’s answer matters. (ACS, NYSDEC)
Is Gowanus mostly houses or apartments, owned or rented?
23% buildings of 3 or 4 units, 23% buildings of 5 to 9 units, 13% two-unit buildings; 41% owner-occupied (Brooklyn: 30%). Two- to four-unit buildings are 36%; a multi-family house means shared systems, separate meters and what each unit controls. Lou’s jobs here included a multi-family building. (ACS)
Is radon a concern in Gowanus?
Brooklyn (reported by borough): 528 basement tests, average 2.07 pCi/L, 54 at 4 or above (10%). First-floor tests there: 116, average 0.88. The highest basement reading was 41.2 pCi/L. EPA’s action level is 4 pCi/L, and it advises testing every home whatever the area’s results. Radon testing is optional. (NYSDOH)
Has Gowanus flooded? Is the house in a flood zone?
98 flood-insurance claims from zip 11215 since 1978, most in 2021 (14): 73rd of the 189 zips on these pages. A claim count describes the zip, not the house. Flood zones follow the address. Check the address on FEMA’s map. (OpenFEMA)
Who holds the permits and certificate of occupancy in Gowanus?
The NYC Department of Buildings. Look the address up on BIS or DOB NOW. Your attorney usually runs the search. The inspection reports the condition of what is there and flags work that typically needs a permit, such as a finished basement, a dormer or a moved panel, so you know what to ask about.
How does Gowanus compare with the towns around it?
By median year built, fuel-oil share and owner-occupancy: Gowanus (zip 11215) 1938, 9%, 41%; Sunset Park (zip 11232): built 1938, oil 10%, 24% owner-occupied; Fort Greene (zip 11217): built 1938, oil 8%, 29% owner-occupied; Carroll Gardens (zip 11231): built 1938, oil 10%, 31% owner-occupied. (ACS)
Which code, water and sewer rules apply in Gowanus?
The New York City Construction Codes, the NYC Department of Buildings records and NYC water and sewer: county-wide, written once. They are the same for every town in Brooklyn, so they are set out there with their sources instead of on each page.
How much does a home inspection in Gowanus cost, and how fast is the report?
Lou quotes the actual property, not a flat rate — what drives the price is size, age and what is included. The written report arrives the same day as a rule; a large or complex house can run to the next morning. Call or text 516-330-3870.