Insight certainty 4/5 debate potential 1/5

O'Brien: Widening staircases with roof bulkheads fixes dark brownstone interiors

Mark O'Brien · I spent a day with a blue-collar millionaire in NYC · Jul 21, 2026 · at 11:00

Real estate developer Mark O'Brien describes his architectural design approach for solving interior lighting challenges in historic townhouse renovations.

0:00 / 0:11exact quote · 11.2s
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“Brownstones are notorious for being a little dark in the middle because there's no windows in the middle typically. So I widen the staircase and I put a lot of light and a bulkhead on the top so you get light down the middle”

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