579 recorded events, 1982–2026, from 15 city data systems. The city's paper trail here is mostly 370 ACRIS deeds & mortgages, 41 DOB violations, 39 DOB permits.
Full record, year by year Support this site
The city's published records show little recorded distress here in the last three years. Less recorded distress than 84% of 6-24-unit residential buildings citywide. The citywide median for 6-24-unit residential buildings is 16.3 penalty points per 10 units; this building carries 1.8. In ZIP 10011, 68% of residential buildings hold an A and 5% grade D or F. How grades work
Among 46,798 6-24-unit residential buildings citywide · left is less recorded distress, right is more
No current HPD flags in the latest weekly snapshot: no open violations, no pending litigation, no active vacate orders, and not in the Alternative Enforcement Program.
No heat or hot-water complaints in the last three years.
No bedbug-infested units reported in the last three years of filings.
$1,250 in enforcement penalties imposed (ECB/OATH) in the last three years.
10 service requests in the last three years. Most common: Noise (3) · Missed Collection (2) · Residential Disposal Complaint (1) · Seasonal Collection (1) · Obstruction (1) · Taxi Complaint (1).
$513,800 in permitted construction work filed since 2016 (4 filings with a declared cost) — a rough measure of how actively the owner maintains the building. Permit costs cover filed construction work only — they do not capture routine maintenance or repairs done without a permit.
| Yes | Built before 1974 (1906) |
| Yes | Six or more residential units (17) |
| No | 421-a / J-51 tax benefit on the current tax roll |
2 of 3 signals present. This is the classic profile of a rent-stabilized building (pre-1974, 6+ units) — many units in such buildings remain stabilized. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).
| Registered owner(s) | ALTAIR 20 CONDOMINIUM |
| Head officer | GREGORY SOVELL |
| Managing agent | MATTHEW ADAM PROPERTIES, INC |
| Last registered | 2026-07-31 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $758,977 | $341,540 |
| 2026 | $799,072 | $359,583 |
| 2027 | $679,831 | $305,924 |
The city's market estimate has fallen 10% between tax years 2025 and 2027.
For property tax, the Department of Finance values this condo as if it were a rental building. Its 2021 estimate: gross income $2,063,787 a year ($49.54 per sq ft), operating expenses $536,568 ($12.88 per sq ft), net operating income $1,527,219. These are the city's estimates from comparable rentals, not the building's actual budget, rents or maintenance charges.
| Facade (Local Law 11) | SAFE (cycle 9) |
Not in the FEMA 1%-annual-chance floodplain (2015 preliminary maps).
Not in a hurricane evacuation zone.
Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.
No street-flooding or sewer-backup complaints on record at this address.
Sources: FEMA flood maps (coastal), NYC DEP Stormwater Flood Maps (cloudburst), NYC hurricane evacuation zones, and 311 records for this address.
| Subway | 23 St — R W · 750 ft straight-line (about a 4-minute walk) · station accessibility: none 23 St — F M · 850 ft straight-line (about a 4-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: 5 Av / W 20 St — M1 M2 M3 M55 · 400 ft |
| Citi Bike | W 20 St & 5 Ave · 350 ft · station location as of 2026-09-23; live availability |
| Bike facility | Painted bike lane mapped within 75 ft |
| School zones (2024–25 map) | Elementary: P.S. 011: The Sarah J. Garnet Elementary School Middle: M.S. 297. Confirm with the DOE's school search. |
Distances are straight-line, not walking routes. Transit locations from the MTA and Citi Bike, bike facilities from NYC DOT, school zones from the DOE's 2024–25 maps.
15 West 20 Street
| Heat or hot water | Heat or hot water |
| Apartment maintenance | Apartment maintenance |
| Bed bugs | Bed bugs |
| Residential pests | Residential pests |
| Rats or mice | Rats or mice |
| Anything else | Anything else |
10 311 service requests from this address in the last three years.
311 will ask for the address, the apartment if the problem is inside, and what's wrong. Contact details are optional for most complaints; food-poisoning reports can be anonymous. Complaints appear in the city's public 311 data, usually within a day or two, and then in the Live from 311 box on this page.
Managed by MATTHEW ADAM PROPERTIES — 57 buildings, 2,537 units. Grades across the portfolio: A49 · B7 · C1. See the whole portfolio
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2025-12-03 | Deed $3,200,000 — from WARNER, SARAH LIANG; PISANO, THOMAS NICHOLAS to FLAT IRON 1520, LLC | $3,200,000 | |
| 2025-12-01 | Mortgage $727,950 — from HSU, BETTY P; CHANG, PETER T to CITIZENS BANK NA | $727,950 | |
| 2025-11-25 | Sold for $3,200,000 | $3,200,000 | $188,235 |
| 2025-11-25 | Sold for $3,200,000 | $3,200,000 | $188,235 |
| 2022-05-05 | Agreement $2,360,000 — from WILLARD, KEITH; WILLARD, JENNIFER to WELLS FARGO BANK, N.A. | $2,360,000 | |
| 2022-03-29 | Mortgage $2,320,000 — from CASPER, DANIEL RAYMOND to MERS | $2,320,000 | |
| 2022-03-29 | Deed $2,900,000 — from JGFT, LLC to CASPER, DANIEL RAYMOND | $2,900,000 | |
| 2022-03-22 | Sold for $2,900,000 | $2,900,000 | $170,588 |
| 2021-09-29 | Mortgage $22,000 — from STAPEN, MATTHEW to BETHPAGE FEDERAL CREDIT UNION | $22,000 | |
| 2021-09-29 | Agreement $822,000 — from STAPEN, MATTHEW to BETHPAGE FEDERAL CREDIT UNION | $822,000 | |
| 2021-03-05 | Mortgage $2,000,000 — from PETER TEH-CHUAN CHANG, AS TRUSTEE; PBC FAMILY TRUST; BETTY PEI-WEN HSU, AS TRUSTEE to WELLS FARGO BANK, N.A. | $2,000,000 | |
| 2021-03-05 | Deed $2,685,000 — from DORR, ROBERT; WEISER, LORI to PETER TEH-CHUAN CHANG, AS TRUSTEE; PBC FAMILY TRUST; BETTY PEI-WEN HSU, AS TRUSTEE | $2,685,000 | |
| 2021-03-03 | Mortgage $1,600,000 — from PATTIZ, KEITH M; SCHEUER, JILL CATHY to CITIBANK, N.A.; MORTGAGE ELECTRONIC REGISTRATION SYSTEMS | $1,600,000 | |
| 2021-03-03 | Deed $2,850,000 — from RAMAN, AKILA; RAMAN-VASEGHI, AKILA; VASEGHI, ALIREZA to PATTIZ, KEITH M; SCHEUER, JILL CATHY | $2,850,000 | |
| 2021-02-19 | Sold for $2,850,000 | $2,850,000 | $167,647 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 0 | 2 | 5 | 10 | 0 | 17 |
| 2018 | 2 | 1 | 4 | 10 | 2 | 19 |
| 2019 | 12 | 4 | 5 | 9 | 4 | 34 |
| 2020 | 3 | 0 | 4 | 10 | 2 | 19 |
| 2021 | 0 | 1 | 4 | 17 | 2 | 24 |
| 2022 | 0 | 2 | 3 | 11 | 2 | 18 |
| 2023 | 0 | 0 | 5 | 18 | 2 | 25 |
| 2024 | 0 | 3 | 10 | 0 | 3 | 16 |
| 2025 | 0 | 0 | 1 | 8 | 2 | 11 |
| 2026 | 0 | 0 | 0 | 0 | 2 | 2 |
Every one of the 579 recorded events, 1982–2026, is laid out year by year in the full report (print-ready).
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