Millennium Tower in Boston is part of a 1.4 million square foot mixed‑use development, but the tower itself (the main 60‑story residential skyscraper) is generally described as about 1.2 million square feet of combined residential, commercial, and retail space.

Quick numbers you’ll see

  • Total development (tower + Burnham Building + retail): ~1.4 million sq ft
  • New tower (60‑story skyscraper): ~1.2 million sq ft
  • Residential units: about 450–500 condos/apartments
  • Residential floor plans: roughly 759 to 12,846 sq ft per unit, with the full 60th‑floor penthouse at 12,846 sq ft
  • Retail in the tower base: around 95,000 sq ft of additional retail (plus more in the overall project)
  • Private club (“The Club” on 8th–9th floors): 23,000 sq ft

What “square feet” can mean here

Because Millennium Tower is a mixed‑use complex, different sources report different totals depending on what they include:

  • Just the skyscraper tower: ~1.2 million sq ft (residential + office + retail within the tower).
  • Whole Millennium Tower development (tower + historic Burnham Building + surrounding retail): ~1.4 million sq ft.
  • Individual apartments: range from small 1‑bedrooms (~759 sq ft) to massive penthouses (up to 12,846 sq ft).

So if someone asks “how many square feet is Millennium Tower Boston?” the most common answer is:

About 1.2 million square feet for the tower itself; about 1.4 million square feet for the full development.

Information gathered from public forums or data available on the internet and portrayed here.