I analyzed 2,451 Brooklyn townhouse sales in 12 neighborhoods to answer what buyers ask about brownstones: price, width, floor plans, garden rentals, cash buyers and Certificates of Occupancy. Flip through the guide or request a copy.

About 4 in 5 Brooklyn brownstones have no Certificate of Occupancy on record. Here is why that is usually a sign of age, not a legal problem, and what to check before you buy.

The median Brooklyn brownstone is 20 feet wide on a 100-foot-deep lot. Widths, lot depths and real size for 12 neighborhoods, from city records.

Three ways to own a Brooklyn brownstone, compared: single-family, multi-family and condo price per square foot across 11 neighborhoods, plus the three-family house hack.

I analyzed 834 Brooklyn townhouse floor plans. Here is how brownstones actually live, why the garden floor is usually the rental, and how much of the mortgage it covers.

Median brownstone prices for 12 Brooklyn neighborhoods, plus ten-year growth, days on market, cash buyers, holding periods, flips and a full neighborhood report card.