- Year built
- 1920
- Type
- Condominium
- Units
- 3
- Floors
- 5
- Amenities
- Voice intercom; private outdoor space with some homes
- Landmark status
- Not an individual landmark; not in a historic district
- NYC Landmarks Preservation Commission and City Planning records, updated February 2026
Every recorded sale at this building, 2007–2025
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2025
- $1,173
- 1 sale
- Listing discount
- 0.7%
- Recorded sales
- 7
- On record
- 2007–2025
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 121 West 15th Street would likely sell for today, what it costs to sell, and what you’d walk away with — reviewed personally against condition, exposures, renovation quality, and the competition actually on the market.
About the building
121 West 15th Street is a three-residence condominium in a twenty-foot-wide Chelsea townhouse. City records date the original building to 1920 and record an alteration in 2006. A later vertical-enlargement filing by architect Stephen Wanta was permitted in January 2018 and proposed six stories while retaining three dwellings.
The accommodation includes a garden duplex, a large middle residence and an upper home that has traded as a penthouse. Private outdoor space includes a garden and balcony. Exposed brick and fireplaces remain part of the interior character, alongside central air conditioning. The building uses a voice intercom entrance system. Its narrow frontage and internally connected levels produce substantially different plans within the three-home inventory.
Local Law 97
This building is below the 25,000 sq ft threshold at which LL97 limits apply to a building on its own. It is still covered if it shares a tax lot or condominium board with buildings totaling over 50,000 sq ft; confirm on DOB’s covered-buildings list.
See full Local Law 97 analysis →Recent sales
Recent closings at this building, from The Roebling Research Library. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Feb 6, 2025 | 1 | 2 BR · 2 BA · 2,366 sf | $2,775,000 | $1,173/sf | -0.7% |
| Jun 22, 2022 | 1 | 2 BR · 2 BA · 2,366 sf | $2,000,001 | $845/sf | — |
| Apr 20, 2017 | 2 | 2 BR · 2,202 sf | $2,850,000 | $1,294/sf | -22.9% |
| Jan 12, 2011 | 3 | 1 BR · 1,050 sf | $1,325,000 | $1,262/sf | — |
| Apr 18, 2007 | 2 | 2 BR · 2,202 sf | $2,952,925 | $1,341/sf | -0.7% |
| Apr 17, 2007 | 3 | 1 BR · 1,050 sf | $1,523,557 | $1,451/sf | +1.8% |
Market read. Most recent trades (2025) cleared a median $1,173/sf (recorded) across 1 sale. Median listing discount 0.7% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Full closing history with price-per-square-foot over time, the complete retrade record, and every line that has traded.
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00791-7501; each condominium apartment is its own tax lot). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage from recorded condo declarations and offering plans.
What would your apartment rent for?
Enter your apartment and I'll send you what it would rent for, from comparable closed leases at 121 West 15th Street and nearby.
Buying here? Condo closing costs with a mortgage typically run 3 to 6% of the price. See NYC co-op and condo closing costs, line by line.
Keep up with 121 West 15th Street and its market
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What to know if you’re buying
The three owners share the costs and decisions associated with an altered townhouse. For the upper accommodation, the approved enlargement and the extent of the deeded home are consequential to both a buyer and a mortgage lender. A lender's acceptance of this three-residence condominium is a separate requirement from the borrower's loan qualification.
Comparable buildings
- The Grid — A four-residence GLUCK+ conversion and enlargement with private outdoor space.
- 136 West 17th Street — A small condominium with large residences in a taller building.
- The Katharine — A historic conversion offering a similarly limited residential inventory.
More Chelsea buildings
- 120 Eleventh Avenue (Lifesaver Lofts) — 1910 condominium
- 120 West 18th Street — 1907 condominium
- 120 West 20th Street — 1950 co-op
- 121 West 17th Street — 1911 co-op
- 121 West 19th Street — 1903 condominium
- 121 West 20th Street — condominium
The neighborhood
For the full corridor — architecture, transit, and pricing across Chelsea — read The Roebling Team Guide to Chelsea.
How to read the facts on this page. Items attributed to an offering plan describe the building as it was offered at that filing — unit mix, square footage, the amenity program as planned. They are not a statement about how the building operates today. Tax and compliance figures are sourced separately to current City records and carry their own dates. House rules, staffing and fee policy can change by board resolution without any public filing: treat every policy line here as a starting point for diligence and confirm it with the managing agent. Where this page compares one building or neighborhood to another, that is our analysis of the recorded record — it names the measure, the period and the sample it rests on, and it is an observation about medians rather than a prediction about any particular apartment.
Considering a move at 121 West 15th Street?
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646.939.7375 · c.cohen@compass.com