--- title: "170 East 77th Street #9C, New York City, NY 10075" description: "170 East 77th Street #9C, New York City, NY 10075 — Lenox Hill, New York City, NY. Listing Price $4,450,000. 4 bed, 4 bath, 2,500 sqft Illustrative Buyer Commission Share of $66,750 at closing, based on a 3% buyer-broker commission." url: "https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10075/170-east-77th-street-9c-ny-10075" source: "Real Estate Rebate Team" dateModified: "2026-10-16T15:27:26.801Z" status: "Active" --- # 170 East 77th Street #9C, New York City, NY 10075 Lenox Hill, New York City, NY Courtesy of Compass Last updated: October 16, 2026, 11:27 AM ## At a Glance - **Listing Price**: $4,450,000 - **Beds**: 4 - **Baths**: 4 - **Sqft**: 2,500 - **Common Charges**: $3,748 / mo - **Monthly Taxes**: $3,333 / mo - **Price per Sqft**: $1,780 - **Brokerage Fee**: Share Eligible ## The Private Brokerage Advantage As an independent luxury buyer representative, Régis shares 50% of the buyer-side commission he actually receives on your purchase. Eligible buyers receive that Buyer Commission Share directly at closing to offset closing costs, down payments, or renovations. The figures below are illustrative, based on a **3% buyer-broker commission**; your share follows the commission offered on the transaction. - **Contract Purchase Price**: $4,450,000 - **Illustrative Buyer Commission Share**: -$66,750* - **Illustrative Net Cost**: $4,383,250 *Illustrative Buyer Savings of $66,750 — 50% of a 3% buyer-broker commission, shared at closing.* [Request a private tour](https://realestaterebatesnewyork.com/contact) · [Estimate your Buyer Commission Share](https://realestaterebatesnewyork.com/calculators/buyer-closing-cost-calculator) ## Photos (10) ![170 East 77th Street #9C, New York City, NY 10075 — photo 1 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/cc6099ee-b013-4807-9a5a-d02bae1ba2b2.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 2 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/7241369c-edf9-4f65-affe-67fefe1b7575.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 3 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/486092e8-f313-4427-823d-a46bc0a45940.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 4 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/6a8d3dc1-0981-44b0-ada4-e8d94a5752b1.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 5 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/1aa93366-298d-474f-b223-963611fe8198.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 6 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/3ba230ff-16a6-4e73-8c66-7171466af3a0.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 7 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/b5aec489-ef6b-47b0-b703-55013487f9ce.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 8 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/572639b9-6cf7-4a00-99b4-8658e0113277.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 9 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/7676d440-2ac6-4406-a53e-8228df2d5e8f.jpg) ![170 East 77th Street #9C, New York City, NY 10075 — photo 10 of 10](https://realestaterebatesnewyork-bucket.nyc3.cdn.digitaloceanspaces.com/3821ccfa-f82c-46e6-8302-08c66d25d247.jpg) ## Property Overview Thoughtfully reimagined with a modern sensibility, Residence 9C at 170 East 77th Street is a turnkey four-bedroom, four-bathroom home defined by elevated design and exceptional craftsmanship. A gracious entry leads into the dramatic step-down living and dining room, an expansive entertaining space framed by oversized windows that flood the home with natural light. Custom built-ins and an 80-inch Dynasty linear electric fireplace anchor the room, while European 10-inch oak plank flooring and electric privacy shades add warmth. The beautifully reimagined kitchen is both striking and highly functional, outfitted with floor-to-ceiling Scavolini cabinetry, a durable Dekton countertop with integrated sink, and a best-in-class suite of appliances including Thermador refrigeration, induction cooktop, wine storage, and Gaggenau oven, microwave, and built-in espresso machine. Privately positioned, the sprawling corner primary suite offers a serene retreat, complemented by custom room-darkening Hunter Douglas electric shades and dedicated Mitsubishi climate control. Spa-inspired baths are finished with honed natural stone slabs, Scavolini vanities, premium Gessi fixtures, concealed wall-hung toilets, upgraded shower systems, and radiant heated flooring in the primary bath, bringing a five-star hotel sensibility to everyday living. Set within Diamond House, a full-service condominium in the heart of Lenox Hill, residents enjoy a 24-hour doorman, fitness center, roof deck, bike room, and a pet-friendly lifestyle. Perfectly positioned moments from Madison Avenue shopping, acclaimed dining, Central Park, and multiple transportation options, the residence offers exceptional convenience in one of the Upper East Side’s most sought-after neighborhoods. ## Property Details - **Property Type**: Condominium - **Beds**: 4 - **Baths**: 4 - **Rooms**: 8 - **Sqft**: 2,500 sqft - **Stories**: 11 - **Year Built**: 1940 - **Price per Sqft**: $1,780 - **Common Charges**: $3,748.18 / Monthly - **Monthly Taxes**: $3,333 / mo - **Listed On**: Oct 16, 2026 - **Days on Market**: 1 Days ### Residence Features - Central Air - Central - Common On Floor - Common Area - In Unit - Building Roof Deck - Entrance Foyer - Soaking Tub - Dishwasher - Wine Cooler - Hardwood ## Estimated Monthly Payment **$29,583 / month**, assuming a 20% down payment ($890,000), a 6.5% interest rate and a 30-year term. The page's calculator lets a buyer change all three. - **Principal & Interest**: $22,502 - **Property Taxes**: $3,333 - **Common Charges**: $3,748 Estimates only. Actual payments may vary. Confirm terms with your lender. ## Sales and market data ### Recent sales 13 apartments at Diamond House have recorded sales since October 2021, the most recent for $1,950,000 in May 2026. Prices are the figures recorded with the City, not asking prices. | Unit | Beds | Sq Ft | Sold Price | $/ft² | Sold | Source | | --- | --- | --- | --- | --- | --- | --- | | 6D (Apartment) | 2 | 1,357 | $1,950,000 | $1,437/ft² | May 28, 2026 | City record · MLS | | 2D (Apartment) | 2 | 1,357 | $1,700,000 | $1,253/ft² | December 29, 2025 | City record · MLS | | 6G (Apartment) | 2 | 1,282 | $1,680,000 | $1,310/ft² | August 20, 2025 | City record · MLS | | 8C (Apartment) | 4 | 2,500 | $401,252 | $161/ft² | April 21, 2024 | City record | | 9C (Apartment) | 4 | 2,500 | $3,350,000 | $1,340/ft² | September 29, 2023 | City record · MLS | | 6-D (Apartment) | 2 | 1,357 | $1,900,000 | $1,400/ft² | September 22, 2023 | City record · MLS | | 10E (Apartment) | 1 | 895 | $1,125,000 | $1,257/ft² | June 10, 2022 | City record · MLS | | 7C (Apartment) | 2 | 1,117 | $1,600,000 | $1,432/ft² | May 26, 2022 | City record | | 2F (Apartment) | — | 3,531 | $4,999,999 | $1,416/ft² | May 11, 2022 | City record | | 2FG/3G (Duplex) | 4 | 3,531 | $5,250,000 | $1,487/ft² | May 11, 2022 | MLS | | 5D (Apartment) | 2 | 1,357 | $1,695,000 | $1,249/ft² | January 27, 2022 | City record · MLS | | 8E (Apartment) | 1 | 895 | $990,000 | $1,106/ft² | November 16, 2021 | City record · MLS | | 3E (Apartment) | 1 | 880 | $895,000 | $1,017/ft² | October 25, 2021 | MLS | Every row is a recorded transaction, including ancillary spaces such as storage and staff rooms where they were sold separately. Those are excluded from the benchmark below. ### How this price compares - **This home**: $4,450,000 - **Median sold price**: $6,000,000 - **Difference**: -$1,550,000 (-25.8%) - **This home, $/ft²**: $1,780 - **Median $/ft²**: $2,234 - **Comparable sales**: 35 - **Sales from**: November 2024 – August 2026 - **Middle half of those sales**: $4,825,000 – $7,258,786 Based on condo four-bedroom sales in Lenox Hill. This building has not had enough comparable sales of its own in the period to support a median, so the benchmark is drawn from Lenox Hill instead. ### How these sales were negotiated - **Sale-to-list price**: 95.6% (32 sales) - **Sold below asking**: 63% (32 sales) - **Typical time to find a buyer**: 91 days (32 sales) - **Typical time to close**: 66 days (28 sales) Based on condo four-bedroom sales in Lenox Hill with the required listing and closing data. Sample sizes vary by metric. These are two separate periods measured on different clocks — time to find a buyer, and time from agreed deal to closing. They are medians of different sets of sales and do not add together into a single "days on market" figure. ### Price trend Median price per square foot, sales at Diamond House | Year | Median $/ft² | Sales | | --- | --- | --- | | 2019 | $1,095/ft² | 3 (thin) | | 2021 | $1,106/ft² | 5 | | 2022 | $1,337/ft² | 4 (thin) | Based on recorded sales at Diamond House. Years marked "thin" rest on fewer than 5 sales, where a single unusual apartment moves the median a long way. Read those points as the small samples they are rather than as the market turning. Sales data through August 2026. Sale prices are the consideration recorded with the City in ACRIS, and each sale is dated by the day the City recorded it. A closing date reported to the MLS typically falls one to two weeks earlier. Recorded sales describe what has already happened and are not an appraisal, a valuation, or an estimate of what this home will sell for. [See every recorded sale at Diamond House](https://realestaterebatesnewyork.com/buildings/new-york-city/manhattan/diamond-house) ## Price and Property History for 170 East 77th Street, Unit 9C Review the recorded listing activity for 170 East 77th Street, Unit 9C, including asking-price changes and prior market dates. - **Last sold (recorded)**: $3,350,000 on September 29, 2023 | Date | Price | Listing event | | --- | --- | --- | | May 4, 2026 | $4,450,000 | Listed for sale by Compass | | September 29, 2023 | $3,350,000 | Sold — recorded sale price | | August 8, 2023 | $3,350,000 | Entered contract | | March 9, 2023 | $3,600,000 | Listed for sale by Douglas Elliman Real Estate | ## About The Building ### Diamond House Lenox Hill · Condominium 170 East 77th Street, New York, NY 10075 A building in Lenox Hill, currently featuring 3 active listings. - **Year Built**: 1940 - **Active Units**: 3 - **Floors**: 11 [View the building page](https://realestaterebatesnewyork.com/buildings/new-york-city/manhattan/diamond-house) ### Available Residences — For Sale (4) | Unit | Beds | Baths | Size | Price / Ft² | Price | Listing Office | Listed Date | Days on Market | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | [9C](https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10075/170-east-77th-street-9c-ny-10075) | 4 | 4 | 2,500 sqft | $1,780 | $4,450,000 | Compass | Oct 16, 2026 | 1 days | | [6A](https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10075/170-east-77th-street-6a-ny-10075) | 4 | 4 | 2,547 sqft | $1,411 | $3,595,000 | Compass | Sep 22, 2026 | 25 days | | [7-C](https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10075/170-east-77th-street-7c-ny-10075) | 2 | 2 | 1,200 sqft | $1,375 | $1,650,000 | William Raveis New York City LLC | Oct 6, 2026 | 11 days | | [7G](https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10075/170-east-77th-street-7g-ny-10075) | 2 | 2 | 1,282 sqft | $1,325 | $1,699,000 (-2.9%) — In contract | Brown Harris Stevens Residential Sales LLC | Oct 29, 2024 | 718 days | ## Potential NYC Second-Home Tax This property may be subject to New York City’s non-primary residence surcharge if it is not used as a qualifying primary residence. The surcharge is based on the NYC Department of Finance market value, not the listing price. [Estimate the Potential Surcharge](https://realestaterebatesnewyork.com/calculators/nyc-second-home-tax-calculator) ## Lenox Hill Overview of Lenox Hill [Explore Lenox Hill](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/lenox-hill) · [All Neighborhoods](https://realestaterebatesnewyork.com/neighborhoods) ### Nearby Lenox Hill - [Inwood real estate for sale](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/inwood) ## Related Links - [Diamond House — building page](https://realestaterebatesnewyork.com/buildings/new-york-city/manhattan/diamond-house) - [Lenox Hill neighborhood guide](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/lenox-hill) - [Estimate your Buyer Commission Share and closing costs](https://realestaterebatesnewyork.com/calculators/buyer-closing-cost-calculator) - [Contact Régis Roumila](https://realestaterebatesnewyork.com/contact) --- > RLS IDX Data display by Real Estate Rebate Team. This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., All rights reserved. IDX information is provided exclusively for consumers’ personal, non-commercial use and it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. > All information furnished regarding property for sale, rental or financing is from sources deemed reliable, but no warranty or representation is made as to the accuracy thereof and same is submitted subject to errors, omissions, change of price, rental or other conditions, prior sale, lease or financing or withdrawal without notice. All dimensions are approximate. For exact dimensions, you must hire your own architect or engineer and the number of bedrooms listed is for informational purposes and is not a legal conclusion. Please consult with your own architect or engineer for exact dimensions and legal specifications.