Brooklyn and Harlem brownstone gut renovations typically run about $450–$750 per sq ft, with many 3–4 story homes landing in the $650 k –$1.4 M + range including systems, layout changes, and façade work. The All‑Electric Buildings Act mainly targets new low‑rise buildings with permits filed on or after Dec 31, 2025 , not most standard brownstone renovations, though full system overhauls and new additions must be designed with future electrification in mind. Sidewalk shed perm
