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What we know about the massive EchelonSeaport development in the Seaport

Luxury New Developments News
A rendering of the EchelonSeaport courtyard.
A rendering of the EchelonSeaport courtyard. Cottonwood Group

EchelonSeaport, a massive, 1.33 million-square-foot, three-tower mixed-use complex, is the latest project to rise in the continuously transforming Seaport District.

Spread out on a sprawling, 3.5-acre lot on Seaport Boulevard, a 14-to-21-story tiered tower capped off Tuesday — the first of three that Los Angeles-based owner and developer Cottonwood Group will build at the site by early 2020, according to project representatives.

The $950 million complex  — which will tout 717 residential units, a 19,000-square-foot public courtyard, and 125,000 square feet of retail and restaurant space once finished — is the largest residential development currently under construction in the city.

Here’s what we know about EchelonSeaport:

What’s inside?

In total, 60,000 square feet of amenities will grace EchelonSeaport from indoor perks like a spa and an “innovation center” to outdoor luxuries like a terrace pool and dining areas, project details show. Units across the complex will include 447 condominiums and 270 rental apartments ranging from “pied-a-terre to three-bedroom homes,” a spokesperson told Boston.com in an email.

At the 133 Seaport Blvd. tower, residents will find 255 condominiums with private terraces, as well as a spa, wine room, outdoor waterfall terrace pool, and fireside lounges, among other amenities.

And inside 135 Seaport Blvd. — a 10-to-21-story tiered tower — 192 residences will be accompanied by balconies, an indoor pool, yoga room, and basketball court, and a fifth-floor terrace that boasts an outdoor pool, dining and lounge areas, and sun cabanas, developers say.

Although details have not yet been released about the third tower, plans show the luxury residence will house 270 rental units along Congress Street and East Service Road.

The development — designed by New York’s Kohn Pedersen Fox Associates PC and Boston-based firm CBT, along with interior lobby and amenity design firm Jeffrey Beers International, based in New York — as a whole boasts a golf simulator, two outdoor pools, an indoor pool, and two “sky lounges,” according to materials provided to reporters Tuesday. The property will also include two stories of luxury shops and restaurants — all surrounding a public, center courtyard, plans show.

Residents at the Regent Hotels and Resorts-branded 133 and 135 Seaport Blvd. condominiums will receive white-glove service, although there are no hotels on site.

And in a first for residential properties in Boston, EchelonSeaport will also include an innovation center, described in project materials as a place residents can go to work and get inspired that “offers up exclusive programming developed in conjunction with leading institutions and thinkers.”

“EchelonSeaport is introducing a new urban resort lifestyle to Boston’s most vibrant neighborhood, and this (topping off) ceremony is a testament to the creativity, diligence, and hard work of all parties involved,” Alexander Shing, chairman and CEO of Cottonwood Group, said in a statement Tuesday.

Boston Mayor Marty Walsh said the project will contribute funding toward the city’s affordable housing initiatives.

“The EchelonSeaport development will add to our housing goals, as we work to ensure new buildings contribute to Boston’s affordable housing stock,” Walsh said in a statement. “Through this project, Boston will gain $3.2 million to support our Inclusionary Development Policy Fund, which will help support new affordable housing, and will add over $1 million to the Neighborhood Housing Trust and Neighborhood Jobs Trust. I’m excited about the collaboration that made this project possible as we continue to make homeownership opportunities available throughout every neighborhood in Boston.”

What is the construction timeline?

Construction crews broke ground on the site in January 2017, with plans for work to continue for three years.

According to project officials, the towers will be completed in phases, starting in mid-to-late 2019 and into early 2020.

How much do the units cost?

Developers haven’t revealed pricing for specific units but have said condominiums will go for $700,000 to over $5 million.

What will it look like?

A rendering of the relaxation pool. —Cottonwood Group
A rendering of the basketball court and indoor gym. —Cottonwood Group
A rendering of the residential terrace. —Cottonwood Group
A rendering of the fire pits and outdoor lounge. —Cottonwood Group