17 Thompson Street

The lot is 1,896 square feet — a single narrow parcel — and the building fills it, 24 feet by 79 feet, rising to a roof about 83 feet above the sidewalk. Roughly 9,500 square feet is residential and 3,872 square feet commercial, of which about 1,500 square feet is retail at grade. Built FAR is 7.05 against a residential FAR of 10.0 in the M1-5/R10 district; that simple comparison does not establish legal zoning floor area or what additional construction would be permitted.

Verify each residence’s actual plan and dimensions within the 24-foot-wide building; the count-to-floor ratio does not establish full-floor layouts, and light depends on the specific windows and obstructions. Listing records document terraces or balconies at some residences and a shared outdoor entertainment space. The Department of Finance carries the building under class C6, the walk-up cooperative class; listing and management-sourced records both document an elevator, so the class code understates the building and should not be read as a description of the services.

This is a small, self-managed-scale cooperative with an outside managing agent and no doorman. There is an elevator, an intercom, and common roof-level outdoor space. Everything else — packages, maintenance response, capital sequencing — runs through the managing agent, and the cost of an elevator, a masonry facade and a Local Law 11 cycle falls on seven apartments in proportion to their shares. That arithmetic is the central operating fact of a seven-unit building and it should be underwritten directly: ask for the current reserve balance, the assessment history, and the facade inspection status.

Real estate taxes — no exemption on the roll. The historical J-51 roll records no J-51 anywhere on this tax block, and the fiscal 2027 assessment roll shows no meaningful exemption on the lot — a market value of roughly $6.19 million against an exemption line of $2,290, which reflects an individual shareholder benefit rather than a building program. The roll shows no 421-a and no 485-x. Abatements apply at the bill level, so check the building's tax bill before relying on that.

Everything below comes from management-sourced records on file and should be confirmed with the managing agent before contract. No offering plan for this cooperative was located in either document library, so the proprietary lease and house rules are the governing documents and neither is public.

Financing ceiling: 80 percent. Twenty percent minimum down; confirm the current limit with the managing agent.

Post-closing liquidity: Not stated in the records reviewed. Assume the board applies a discretionary standard and prepare the package accordingly.

Board package and interview: A full cooperative package with references, financials and a credit authorization, processed through the managing agent, followed by a board interview. Virtual board interviews are permitted per current management-sourced records.

Subletting: Permitted with board approval, with a sublet fee of $200 per month on a residential sublease and $300 per month on a commercial sublease. Short-term rentals and hosting-platform stays are prohibited outright. No maximum sublet term appears in the records reviewed — ask for it.

Pied-à-terre and secondary residence: Permitted with conditions, including board approval. Confirm the conditions in the proprietary lease and house rules.

Ownership structures: Co-purchase, guarantors, parents purchasing for an employed or student child, corporate purchase and diplomatic purchase are all permitted with board approval. Trust ownership is not addressed in the records reviewed and should be raised with the managing agent early, because a board that considers each structure case by case can still decline a particular one.

Pets and in-unit laundry: Both permitted with board approval. Smoking is prohibited.

Fees per management-sourced records: buyer application processing $700, non-refundable; credit check $20 per applicant; refundable move-in and move-out deposits of $500 each; refinance processing $150; alteration application $500 with a refundable security deposit equal to 10 percent of the renovation cost, capped at $10,000.

Flip tax: Not documented. No transfer fee appears in the material reviewed. That does not mean none exists — the proprietary lease governs, and a seller should confirm it before setting a net-proceeds expectation.

Recent sales

Recent transfers 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.

Market read. $/sf is measured on the latest sales with reliable square footage (2021): a median $1,303/sf (recorded) across 1 sale. The building has traded as recently as 2025. Median listing discount 0.0% from the last ask.

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00227-0055). 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 on co-ops is not officially recorded, figures shown are approximate.

Ask the artist-occupancy question first. Records show filings converting the building to joint living-work quarters for artists in 2003 and to Class A apartments in 2007, and the lot now sits in the Special SoHo-NoHo Mixed Use District created in 2021. Whether any certification condition still attaches to the specific apartment — and what the SoHo-NoHo Arts Fund framework would require to clear it — is a question for the cooperative's counsel. Do not assume it is resolved because the certificate of occupancy is final.

Read the 2024 certificate of occupancy against the share allocation. It records six dwelling units; the assessment roll records seven cooperative apartments. Confirm which line the apartment you are buying occupies.

Seven apartments carry the whole building. Elevator, facade, roof, Local Law 11. Ask for the reserve balance, the assessment history and the facade cycle status in writing before you are in contract.

The financing ceiling is generous; the package still is not automatic. Eighty percent financing with 20 percent down is permissive, and every ownership structure is permitted only with board approval. Run the Co-op Board Qualification Calculator before offering, and prepare for a genuine interview.

There is no abatement and no landmark constraint. Taxes are full freight. Exterior alterations need DOB permits and board approval but no LPC permit, which removes one approval layer compared with buildings three blocks north inside a designated district.

Lead with the final certificate of occupancy. After twelve years of temporary certificates, a final one issued in May 2024 is a selling point that survives attorney diligence. Present it up front.

Have the loft history documented, not implied. The 2003 and 2007 alteration applications and the Loft Board registration are the provenance of this building. A buyer's counsel will find them; a seller who has already assembled them controls the narrative.

Confirm the flip tax before you price. It is not in the public record. Get the answer from the managing agent and build it into the net sheet rather than discovering it at contract. Run the Seller Closing Cost Calculator once you have it.

Comparables are scarce by design. Nine recorded share transfers in eighteen years is not a data set. Build the case from converted loft cooperatives in southern SoHo and Hudson Square of similar vintage and unit count, and price the specific floor.

If you're considering 17 Thompson Street, also evaluate:

• 83 Thompson Street — SoHo loft building a few blocks north; the closest peer by street and scale
• 131 Thompson Street — SoHo loft building with 38 homes
• 140 Thompson Street — SoHo building on the same street; useful for calibration
• 57 Thompson Street — SoHo residential building on the same corridor; verify its ownership structure
• 14 Wooster Street — SoHo loft building on Wooster Street, inside the cast-iron district; the designated-district alternative
• 105 Wooster Street — small SoHo loft condominium; boutique cast-iron comparable
• 27 Wooster Street — SoHo loft condominium with fifteen homes
• 51 Canal Street — loft building on the Canal Street corridor; similar bones, different submarket
• 161 Grand Street — loft building on Grand Street; a broader downtown comparable
• 173 Grand Street — small Grand Street loft building; useful per-foot calibration
• 10 Sullivan Street — the new-construction alternative in the immediate area, at a different price tier