Want · Office
Series B fintech needs 8,000 to 12,000 SF
Posted by the tenant · Fintech
- Where
- Midtown South, Flatiron +1
- Size
- 8,000 to 12,000 SF
- Budget
- to $85/SF
- Move in
- Jan 2027
Near subwayHigh ceilings
Owners: got a fit?I have a fit
Commercial condominium · Flatiron, Manhattan
W. & J. Sloane Building
880 Broadway, New York, NY 10003
The W. & J. Sloane Building (880 Broadway) is a 6-floor commercial condominium in Flatiron, Manhattan, built in 1882, with about 62,000 square feet of office space according to city records.
Also at 880-888 Broadway and 30 East 19th Street.
- Office space
- 62K SF
- Floors
- 6
- Year built
- 1882
- Zoning
- M1-5M
The 64th largest of the 75 office buildings we track in Flatiron. Compare it with 6 neighbors
No space at 880 Broadway 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.
Compared with its neighbors
How the W. & J. Sloane Building compares
Next to the 6 nearest large office buildings, all within a 2 minute walk, the W. & J. Sloane Building is the smallest by office floor area. Built in 1882, it is the oldest of them. Its estimated property tax, about $28.76 a square foot of floor area before abatements, is above the neighbors' median of $21.73.
| Building | Office space | Floors | Built | Tax / SF | Last sale |
|---|---|---|---|---|---|
| W. & J. Sloane Building, 880 Broadway | 62K SF | 6 | 1882 | $28.76 | n/a |
| 33 East 18th Street | 63K SF | 10 | 1900 | $19.55 | Feb 2025, $38M |
| Goelet Building, 894 Broadway | 89K SF | 10 | 1887 | $15.87 | n/a |
| 230 Park Avenue South | 311K SF | 13 | 1900 | $23.58 | Sep 2007, $229M |
| 881 Broadway | 208K SF | 7 | 1896 | $22.94 | n/a |
| Parish Building, 860 Broadway | 65K SF | 6 | 1884 | $23.81 | n/a |
| 242 Park Avenue South | 103K SF | 12 | 1911 | $20.52 | n/a |
Sources: NYC Department of City Planning, PLUTO 26v2 for size, floors and year built; NYC Department of Finance 2026/27 roll for tax (taxable value times the class rate, before abatements, over the whole floor area); ACRIS for the last deed that moved the whole lot for a real price (a price for several lots is their combined price; condominiums sell by the unit and show n/a). Large means at least 50,000 SF of the building's main use. Walking times are straight-line estimates.
NYC tax lot records
Building facts
- Building name
- W. & J. Sloane Building
- Other addresses
- 880-888 Broadway; 30 East 19th Street
- ZIP code
- 10003
- Building type
- Commercial condominium (city class RC)
- Total floor area
- 82,301 SF
- Commercial floor area
- 82,301 SF
- Office
- 62,237 SF
- Retail
- 20,064 SF
- Height
- 6 floors
- Average floor
- About 13,700 SF (floor area divided by floors)
- Year built
- 1882
- Lot area
- 13,232 SF
- Zoning district
- M1-5M
- Built FAR
- 6.22
- Max commercial FAR
- 5
- Historic district
- Ladies' Mile Historic District
- Tax lot (BBL)
- 1008477501
Nearest subway
- 14 St-Union Sq
- 23 St-Baruch College
- 23 St
Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-09-30; addresses from the Property Address Directory (PAD) 26b; building name from the NYC Landmarks Preservation Commission (below); subway stations from the MTA Subway Stations dataset, pulled 2026-10-02. Floor areas are the city's estimates for the whole building, not available space. Walking times are straight-line estimates. How we build these pages. Something wrong on this page? Tell us.
NYC Department of Finance records
Owner, property tax and assessed value
The W. & J. Sloane Building is a condominium of 2 tax lots. 880 BROADWAY OWNER, LLC, one of 2 owners of record on the roll, owns the units that make up 79% of its market value. For tax year 2026/27 the city values the W. & J. Sloane Building at $54.5 million and assesses it at $24.5 million. After phase-ins and exemptions its taxable value is $21.8 million; at the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists) that comes to about $2.37 million a year before abatements, roughly $28.76 per square foot of floor area. Commercial leases here often pass a tenant's share of tax increases over a base year through as additional rent.
- Largest unit owner
- 880 BROADWAY OWNER, LLC (79% of market value)
- Tax class
- Class 4 (commercial and industrial)
- City market value
- $54,503,000
- Land market value
- $5,646,000
- Assessed value
- $24,526,350
- Taxable value (phased in)
- $21,821,168
- Estimated yearly tax
- About $2.37 million
- Tax per SF of floor area
- About $28.76
- Condominium tax lots
- 2
- Owners of record
- 2
City market value by tax year
Source: NYC Department of Finance, Property Valuation and Assessment Data (2026/27 roll, summed over 2 condominium tax lots; owner names as the roll records them, which cuts some long names short), pulled 2026-10-02; tax rate from the Department of Finance tax rates page, checked 2026-09-28. The estimate is the taxable value times the class rate. It leaves out abatements, payment-in-lieu-of-taxes agreements and charges, so the actual bill can differ.
NYC energy benchmarking (Local Law 84)
Energy score, grade and emissions
The W. & J. Sloane Building reported an ENERGY STAR score of 80 out of 100 for 2024 in its Local Law 84 benchmarking filing. Under Local Law 33 that score earns a B (70 to 84). Its site energy use came to 67 kBtu per square foot, 36% below the national median of 104.8 for a similar property. Its greenhouse gas emissions were about 683 metric tons of CO2e (6.5 kg per square foot).
- ENERGY STAR score (2024)
- 80 of 100
- Grade this score earns (Local Law 33)
- B (70 to 84)
- Property type (Portfolio Manager)
- Office
- Site energy use intensity
- 67 kBtu/SF
- National median for the type
- 104.8 kBtu/SF
- Greenhouse gas emissions
- 683 t CO2e
- Emissions per SF
- 6.5 kg CO2e
- Floor area in the filing
- 105,082 SF
Energy sources in 2024
Source: NYC Department of Buildings and Mayor's Office of Climate and Environmental Justice, NYC Building Energy and Water Data Disclosure for Local Law 84 (2024 filing), pulled 2026-10-02; grade cutoffs from the Department of Buildings energy grades page. Figures are as the owner filed them in ENERGY STAR Portfolio Manager. The grade is the one the filed score earns under the law's cutoffs; the Department of Buildings assigns the grade a building posts, which can differ.
NYC Department of Buildings permits
Work permits and build-outs
In the 12 months to September 2026, the Department of Buildings issued first permits for 6 jobs at the W. & J. Sloane Building. In the last two years, interior work was permitted on 5 floors (floors 1 and 3 to 6). The newest build-out, on floors 3 and 4, was first permitted in March 2026 (structural; filed cost estimate $275,000).
- New jobs, last 12 months
- 6
- Initial permits, last 12 months
- 9
- Newest job first permitted
- March 2026
- Interior build-outs, last 24 months
- 5
- Floors with interior work, last 24 months
- 1 and 3 to 6
Recent build-outs
New jobs by year
Build-outs across FlatironWhere NYC offices are being built out
Source: NYC Department of Buildings, DOB NOW: Build Approved Permits, pulled 2026-10-02 (permits issued through 2026-09-30). A job counts once, when its first permit is issued; renewals are not new work. A build-out groups jobs on the same floors first permitted within 120 days of each other. Costs are the estimates filed with the jobs. Jobs filed before DOB NOW (in the older BIS system) are not counted. A permit is approval to do the work; it does not say who the work is for or whether it is finished.
Landmarks Preservation Commission records
Architecture and history
The W. & J. Sloane Building was designed by William W. Smith (architect), P. T. O'Brien & Son (builder) and built in 1882 in the Commercial Palace style. It stands in the Ladies' Mile Historic District, so exterior changes and new signage go through the Landmarks Preservation Commission.
- Architect
- William W. Smith (architect), P. T. O'Brien & Son (builder)
- Constructed
- 1882
- Style
- Commercial Palace
- Primary material
- Brick
- Built as
- Store
Source: NYC Landmarks Preservation Commission, Individual Landmark and Historic District Building Database on NYC Open Data, pulled 2026-10-02. A designation can cover part of a lot, such as a facade or a lobby interior.
Office space nearby in Flatiron
Nothing is listed nearby yet. The labeled examples below show how a space appears; they are not on the market.
What a requirement here looks like
No live requirements for office space in Flatiron yet. These labeled examples show what tenants post. List a space in 880 Broadway and we match it against every new one automatically.
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
Before you sign
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Questions about W. & J. Sloane Building
How big is the W. & J. Sloane Building?
The W. & J. Sloane Building has about 82,000 square feet of floor area in total, including 62,000 square feet of office and 20,000 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 the W. & J. Sloane Building built?
The Landmarks Preservation Commission's building records date the W. & J. Sloane Building to 1882, designed by William W. Smith (architect), P. T. O'Brien & Son (builder). The building is 6 floors tall.
Who designed the W. & J. Sloane Building?
William W. Smith (architect), P. T. O'Brien & Son (builder), according to the Landmarks Preservation Commission's building records, which list the style as Commercial Palace and its original use as a store.
What is the address of the W. & J. Sloane Building?
The W. & J. Sloane Building is at 880 Broadway in Flatiron, Manhattan. City records list 880-888 Broadway and 30 East 19th Street on the same tax lot (BBL 1008477501). A space listed on Leasemark at any of these addresses shows up on this page.
What is the ZIP code of 880 Broadway?
880 Broadway is in ZIP code 10003, according to the city's tax lot records (NYC PLUTO 26v2) and the Department of Finance's assessment roll. The W. & J. Sloane Building is at 880 Broadway, New York, NY 10003, in Flatiron.
What is the zoning at the W. & J. Sloane Building?
The lot is in the M1-5M zoning district. PLUTO lists a built floor area ratio (FAR) of 6.22 and a maximum commercial FAR of 5 for this lot. It is inside the Ladies' Mile Historic District, so exterior changes go through the Landmarks Preservation Commission.
What subway station is closest to the W. & J. Sloane Building?
The closest subway station to the W. & J. Sloane Building is 14 St-Union Sq (the 4, 5, 6, L, N, Q, R and W trains), about 900 feet away in a straight line, roughly 3 minutes on foot. The MTA lists it as an accessible station. Also nearby: 23 St-Baruch College (the 6 train), 4 min walk; 23 St (the R and W trains), 4 min walk. Walking times are straight-line estimates; the street route is longer.
Who owns the W. & J. Sloane Building?
The W. & J. Sloane Building is a condominium of 2 tax lots. 880 BROADWAY OWNER, LLC, one of 2 owners of record on the roll, owns the units that make up 79% of its market value. That is from the NYC Department of Finance's 2026/27 assessment roll (BBL 1008477501). Deeds and mortgages for each unit are public in ACRIS, the city's property records system.
What is the energy grade of the W. & J. Sloane Building?
The W. & J. Sloane Building reported an ENERGY STAR score of 80 for calendar year 2024 in its Local Law 84 benchmarking filing. Under Local Law 33, as amended by Local Law 95 of 2019, a score of 85 or higher earns an A, 70 to 84 a B, 55 to 69 a C and under 55 a D, so 80 earns a B. The Department of Buildings assigns the grade a building posts, so the posted label can differ if a filing was corrected. Its site energy use came to 67 kBtu per square foot, 36% below the national median of 104.8 for a similar property. Its greenhouse gas emissions were about 683 metric tons of CO2e (6.5 kg per square foot).
Is there construction at the W. & J. Sloane Building?
In the 12 months to September 2026, the Department of Buildings issued first permits for 6 jobs at the W. & J. Sloane Building. In the last two years, interior work was permitted on 5 floors (floors 1 and 3 to 6). The newest build-out, on floors 3 and 4, was first permitted in March 2026 (structural; filed cost estimate $275,000). These are the Department of Buildings' DOB NOW work permits for tax lot 1008477501. A permit is approval to do the work; it does not say who the work is for or whether it is finished.
What are the property taxes at the W. & J. Sloane Building?
The Department of Finance's 2026/27 assessment roll lists a taxable value of $21.8 million for the W. & J. Sloane Building (the sum of its 2 condominium tax lots). At the Class 4 rate of 10.848% (tax year 2025/26, the latest rate the Department of Finance lists), that is about $2.37 million a year, roughly $28.76 per square foot of floor area, before abatements such as ICAP. The city's property tax records for BBL 1008477501 show the actual bill.
What is the assessed value of the W. & J. Sloane Building?
For tax year 2026/27, the NYC Department of Finance puts the market value of the W. & J. Sloane Building at $54.5 million ($5.65 million of it land) and its assessed value at $24.5 million, the 45% of market value the city assesses for Class 4 property. The city's market value rose 28% from 2022/23 ($42.4 million) to 2026/27.
Is there office space for lease at the W. & J. Sloane Building?
No space at 880 Broadway 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.
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Flatiron
Transit hubs in Flatiron
- R W at 23 St
- 4 5 6 L N Q R W at 14 St-Union Sq
- F M at 23 St