177 Ninth Avenue
177 Ninth Avenue, New York, NY 10011
BBL 1007187501 · BIN 1088184
- Year built
- 2010
- Type
- Condop
- Ownership structure
- Cooperative; the city classifies the tax lot as a condominium (a condop structure)
- The Roebling Team's building profile
- Landmark status
- Not an individual landmark; in the Chelsea Historic District
- NYC Landmarks Preservation Commission records, updated February 2026
- Subletting by shareholders
- Permitted
- Doorman
- Full-time doorman
Every recorded sale at this building, 2008–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2026 to date
- $2,367
- floor-adjusted, 3 sales
- Listing discount
- 10.0%
- Recorded sales
- 104
- On record
- 2008–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at The Chelsea Enclave 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.
The Chelsea Enclave is one of the most distinctive new buildings in Chelsea precisely because it does not try to stand apart — it is woven into one of the neighborhood's great historic settings. Completed in 2010 by The Brodsky Organization and designed by Polshek Partnership Architects (now Ennead) with interiors by Alan Wanzenberg, the seven-story, 53-residence cond-op occupies a corner of the General Theological Seminary block, replacing a 1960s structure with a red-brick building that matches the Seminary's Gothic Revival vocabulary and sits comfortably within the Chelsea Historic District.
The building's defining amenity is its setting. Residents have exclusive access to the Seminary's block-long, European-style garden — a private, gated green space that anchors the building’s identity. Confirm the scope and conditions of residents’ access in the governing documents.
For buyers, the appeal is the combination of contextual architecture, a serene and private setting, and full-service living, in one of Chelsea's most desirable pockets — steps from the High Line, the gallery district, and the Hudson River parks.
Architecture and unit composition
The design is an exercise in restraint and context. Polshek's red-brick façade was conceived to harmonize with the Seminary's 19th-century Gothic Revival buildings, with proportions, materials, and detailing chosen to belong on the block rather than announce a new arrival. Wanzenberg's interiors carry that sensibility inside — warm, finely detailed, and tailored to the building's quiet character.
The 53 residences range from one-bedroom homes to expansive penthouses with private terraces, many oriented toward the garden and the leafy historic streetscape. The boutique scale and the contextual design give the building an intimacy uncommon in new construction, and the homes are prized for their light, their outlook onto the garden, and the level of finish. The penthouses, with their private outdoor space and elevated views over the Seminary grounds, are the building's crown.
Building operations
The Chelsea Enclave runs as a full-service building with an amenity package scaled well beyond its size. Residents have a 24-hour concierge, a fitness center, a private roof lounge with a sundeck, grill, and children's play space, an on-site garage, a bicycle room, private storage, and a live-in superintendent — and, above all, exclusive access to the Seminary's block-long garden, the amenity that defines the building.
Buyers acquire cooperative shares and a proprietary lease in Chelsea Enclave Owners Corp., which owns the residential unit of the building's condominium. Approval, financing limits, subletting and pied-à-terre, trust or entity purchases follow the cooperative's governing documents and current rules, which can be more flexible than a typical co-op; confirm them before contract. A 2010 plan amendment described a 99-year severance lease; whether and how any lease affects owners today should be confirmed in the current documents.
Sublet and pied-à-terre policy
A condominium owner leasing a unit and a co-op shareholder subletting are different rules, and a building-wide rule is different from a restriction on one apartment. This is the building's rule; confirm it for the specific apartment.
- Subletting by shareholders
- PermittedSource: The Roebling Team's building profile
- Pied-à-terre ownership
- Not verified
Considering an apartment here? Send Corey the listing to discuss the sublet and pied-à-terre rules for that apartment.
Own an apartment here? Request an apartment-specific pricing review.
Monthly carrying charges in recent sales
- Maintenance, per room
- $1,356 per room a monthMedian of 6 recorded sales since October 2023Source: recorded sales, refreshed October 2026
- Maintenance, per square foot
- $3.82 per square foot a monthMedian of 8 recorded sales since October 2023Source: recorded sales, refreshed October 2026
Maintenance as recorded with each sale. A co-op's maintenance already covers the building's real estate taxes and the building's own mortgage, if it has one; add your own loan payment for the monthly outlay. A summary of recorded sales, not a current bill; charges change.
Building staffing and amenities
- Doorman
- Full-time doormanSource: recent listing records
- Concierge
- YesSource: recent listing records
- Attended lobby
- YesSource: The Roebling Team's building profile
- Live-in superintendent
- YesSource: The Roebling Team's building profile
- Elevator
- YesSource: NYC Department of Buildings elevator records
- Amenities noted
- Fitness room, residents' lounge, roof deck, garden, garage, bike storage, storageSource: The Roebling Team's building profile
Staffing and amenities as our building profile and recent listing records describe them. A feature not listed is not confirmed absent. Outdoor space, parking and some facilities can belong to particular apartments or to a separate owner; confirm access for the specific apartment.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $98,216/yr
- Per unit / month range
- $0 – $152
- Modeled exposure split equally across 54 units (the residential count on the city's lot record). Not an assessed amount; co-op shareholders are typically charged by share allocation.
Source: NYC LL84 benchmarking and PLUTO · The Roebling Research Library. City data last refreshed October 2026.
See full Local Law 97 analysis — emissions history, scenarios, methodology →Facade safety — Local Law 11
The latest available filing classified the facade as SWARMP — Safe With A Repair and Maintenance Program: the inspector (QEWI) identified conditions requiring monitoring or repair, with repairs due by the deadline stated in the filing. The scope, timeline, and how the building funds the work are building-specific — we review the filings and board materials for you.
How to read this, and where it comes from
QEWI = Qualified Exterior Wall Inspector — a licensed professional engineer or registered architect who meets DOB’s FISP qualifications and signs the report (the independent expert, not the managing agent).
Source: NYC DOB facade filings (FISP) · The Roebling Research Library. City data last refreshed October 2026.
421-a Tax Abatement
- Last year of benefit
- FY2021
- Fully taxed from
- FY2022 (2021–22)
- Program
- 421-a (10-year)
The 421-a benefit has run its term, so taxes on these units have stepped up toward the full assessed amount. Get the current tax bill for the specific apartment and compare its tax component with any older listing: an earlier carrying-cost figure may reflect the benefit, or different common charges and assessments. Treat a comparable sale made while the abatement was still running as priced under different taxes.
Source: NYC Dept. of Finance property-tax exemption records (421-a), refreshed 2026-09-06 · The Roebling Research Library. Confirm the exact step-up schedule on the building’s DOF tax bill. Years shown are NYC tax years, which start July 1 — FY2022 runs July 1, 2021 to June 30, 2022. The benefit last appears on the 2021 assessment roll, which is what dates the end of the term.
The 421-a Expiration Wave — our study of when these benefits expire citywide, and what the resale record shows about pricing as they do.
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 |
|---|---|---|---|---|---|
| Sep 1, 2026 | 3K | 2 BR · 2.5 BA · 1,648 sf | $3,600,000 | $2,184/sf | -2.6% |
| Jul 8, 2026 | 5D | 2 BR · 2.5 BA · 1,732 sf | $4,100,000 | $2,367/sf | -2.4% |
| Apr 2, 2026 | 5H | 2 BR · 2.5 BA · 1,804 sf | $4,500,000 | $2,494/sf | +0.0% |
| Dec 4, 2025 | 4G | 2 BR · 2.5 BA · 1,564 sf | $3,250,000 | $2,078/sf | -7.0% |
| Sep 8, 2025 | PHF | 4 BR · 3 BA · 2,129 sf | $5,600,000 | $2,630/sf | -6.6% |
| Jun 5, 2025 | 2E | 1 BR · 1.5 BA · 882 sf | $1,480,000 | $1,678/sf | — |
| Jul 8, 2024 | 5E | 1 BR · 1.5 BA · 882 sf | $1,579,000 | $1,790/sf | -1.0% |
| Dec 15, 2023 | 4J | 3 BR · 2,259 sf | $5,700,000 | $2,523/sf | — |
Market read. Most recent trades (2026 to date) cleared a median $2,367/sf (floor-adjusted) across 3 sales. Floor-adjusted means each sale is restated to a constant mix of floors, so the figure can differ from the plain median of the sales listed above. Median listing discount 10.0% 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 1-00718-7501; 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.
Closed rents at The Chelsea Enclave, last 36 months
3 closed leases, October 2023 to September 2026. Most recent lease January 2026. Based on few leases. Compiled by The Roebling Team at Compass from closed leases.
What would your apartment rent for?
The figures above are the building's closed leases. Enter your apartment and I'll send you what yours would rent for, from comparable leases at The Chelsea Enclave and nearby.
At the recent median sale of $3.85M (6 transfers in the past 24 months, since October 31, 2024), a buyer putting 25% down would pay about $72,300 to close, or 1.9% of the price.
- Mansion tax: $57,750
- No mortgage recording tax or title insurance on a co-op purchase
- Attorneys, lender, building fees and filings: $14,550
Assumes a resale (the seller pays transfer taxes), a $4,500 attorney fee and a mortgage on the rest.
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What to know if you’re buying
Buy the setting. The reason to own here is the private garden and the contextual architecture. Their effect on resale value depends on comparable sales and market conditions. Garden-facing homes capture the full benefit; confirm the line's orientation and outlook.
Value the boutique full-service profile. Fifty-three homes with a concierge, garage, roof lounge, and the Seminary garden is a rare balance of intimacy and service. The penthouses, with private terraces over the historic grounds, are the building's signature homes.
Present the ownership structure accurately: cooperative shares within a condominium, with the approval, financing and use rules the current documents set — and lead with the location, steps from the High Line, the galleries, and the waterfront parks, one of Chelsea's most coveted.
What to know if you’re selling
Lead with the garden. The exclusive access to the Seminary's block-long garden is a central feature to document in marketing. Pair it with the contextual architecture and the boutique full-service profile.
Benchmark to boutique Chelsea condominiums. Compare a resale with design-focused Chelsea inventory, accounting for cooperative ownership within a condominium, services, condition, outdoor space and carrying costs. Use sale evidence to test any adjustment for garden outlook or penthouse features.
Present to the calm. Buyers respond to the serenity of the garden setting and the quality of the Wanzenberg interiors; show the home’s light, garden outlook and finishes accurately, with current listings and recorded sales supplying the evidence for availability.
Comparable buildings
If you're considering The Chelsea Enclave, these nearby Chelsea condominiums are worth evaluating:
- 212 West 18th Street — Chelsea condominium
- 224 West 18th Street — the boutique Campiello Collection condominium
- 245 Tenth Avenue — West Chelsea condominium near the High Line
- 100 Eleventh Avenue — Ateliers Jean Nouvel with Beyer Blinder Belle's 2010 Manhattan condominium
- 520 West 19th Street — West Chelsea condominium; compare its construction history, layouts and services
- 450 West 17th Street — Handel Architects (with Clodagh)'s 2008 Manhattan condominium
More Chelsea buildings
- 162 West 22nd Street (The Henry) — 1950 co-op
- 163 West 18th Street (The Slate) — 2006 condominium by Karl Fischer Architects
- Yves Chelsea, 166 West 18th Street — 2008 condominium by Ismael Leyva Architects
- 179 Seventh Avenue — 1987 condominium
- 192 Eighth Avenue (Novum Chelsea) — new-construction condominium
- 200 Eleventh Avenue (The Sky Garage) — 2010 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 The Chelsea Enclave?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.
646.939.7375 · c.cohen@compass.com