Want · Office
Startup seeking furnished sublease
Posted by the tenant · Software
- Where
- Flatiron, Midtown South +1
- Size
- 6,000 to 11,000 SF
- Budget
- to $60/SF
- Move in
- Nov 2026
Furnished
Owners: got a fit?I have a fit
Office building · Financial District, Manhattan
123 William Street
123 William Street is a 26-floor office building in Financial District, Manhattan, built in 1912, with about 487,000 square feet of office space according to city records.
- Office space
- 487K SF
- Floors
- 26
- Year built
- 1912
- Listed on Leasemark
- 0
No space at 123 William Street is listed on Leasemark yet. Own or broker space here? List it free and it is matched against every active requirement the day it goes up, or import a spreadsheet of up to 50 spaces at once.
NYC tax lot records
Building facts
- Building type
- Office building (city class O4)
- Total floor area
- 493,039 SF
- Commercial floor area
- 493,039 SF
- Office
- 486,568 SF
- Retail
- 6,471 SF
- Height
- 26 floors
- Year built
- 1912
- Lot area
- 21,242 SF
- Zoning district
- C6-4
- Built FAR
- 23.21
- Max commercial FAR
- 10
- Tax lot (BBL)
- 1000780004
- ZIP code
- 10038
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-09-26. Floor areas are the city's estimates for the whole building, not available space. Walking times are straight-line estimates.
Office space nearby in Financial District
Looking for office space in Financial District
Tenants and buyers with active requirements here. List a space in 123 William Street and we match you automatically.
Questions about 123 William Street
How big is 123 William Street?
123 William Street has about 493,000 square feet of floor area in total, including 487,000 square feet of office and 6,000 square feet of retail, according to NYC PLUTO 26v2. These are the city's estimates for the whole building, not space that is available.
When was 123 William Street built?
City records list 1912 as the year built. The building is 26 floors tall.
What is the zoning at 123 William Street?
The lot is in the C6-4 zoning district. PLUTO lists a built floor area ratio (FAR) of 23.21 and a maximum commercial FAR of 10 for this lot.
Is there office space for lease at 123 William Street?
No space at 123 William Street is listed on Leasemark right now. Owners and brokers can list space here for free, and tenants can post a requirement to be matched when space opens up.
Financial District
Getting there
- 2 3 4 5 at Wall St
- A C J Z at Fulton St
- PATH at World Trade Center