Default organization


Total Square Footage 3819242
Total Dollar Volume $ 546,000,000


Established 1949
Website Please click here to verify >>

Proud Member Of:


You see J. Derenzo Co. everywhere from jersey barriers to heavy equipment. But what do we do? J. Derenzo Co. is often the first boots on the ground preparing sites for new construction – clearing and grading the land, performing excavation, installing earth retention and foundation systems. We are also the last boots on the ground completing landscaping, installing curbing and finalizing utility hook ups.

J. Derenzo Co. has been one of New England’s premier site work contractors for over 65 years. The team’s experience ranges from large scale rural site clearing to some of the most complex, tight-site, deep hole excavations in downtown Boston. Our diversity of expertise has been a key driver in amassing a portfolio of work that is second-to-none in the industry.

Everyone at J. Derenzo Co. appreciates the importance of client relationships. A project is only as successful as the partnerships you create with clients along the way; our team puts a priority on ensuring not only seamless, well-done projects, but on successful, long lasting relationships.


Boston Landing
- Mar 08, 2018

Bose beginning tenant fit-out of newly leased space at Boston Landing. Consisting of 98,000 square footage on levels 7-8-9 & 10 in the building,  new lighting and lighting control is being completed. Installation of new electric rooms on each level and new general purpose power wiring.  All heating and cooling equipment is already in place.

100 Federal Street Atrium Addition
- Feb 27, 2018

New street-level glass atrium opens at 100 Federal in Financial District

A new public glass atrium overlooking Post Office Square teeming with natural lighting has opened on the ground floor of the 100 Federal office tower. Dubbed The Exchange, the atrium features 8,500 square feet of retail, 500 square feet of kiosk space and a 8,990 square foot year-round garden. The atrium’s civic space is now open, and retail announcements will follow in the coming months. The following are photographs of The Exchange:

Brookline Place Redevelopment
- Feb 22, 2018

Brookline Place medical office property redevelopment begins next phase

Following completion of a new seven-level, 683‐space parking garage, the redevelopment of the Brookline Place medical office property in Brookline Village is beginning its’ next phase. A temporary surface parking lot, which supplied parking for the existing six-story One Brookline Place medical office building during the garage’s construction, is now being razed to make way for Two Brookline Place, an upcoming eight-story, 182,500 square foot building, as well as a six-story, 47,000 square foot addition to One Brookline Place. The upcoming structures will feature medical office and ambulatory care space, as well as ground-floor retail. The following are photographs of the Brookline Place site:

Brookline Place Photos

UMass Boston Residence Hall 1
- Aug 03, 2017

UMass Boston's first student residence hall tops off at 12 stories tall

UMass Boston's first-ever on-campus student residence hall, featuring 1,077 beds and a host of amenities, has topped off at 12 stories tall. A topping-off ceremony was held at the $120 million residence hall today, during which the structure's last steel beam was lifted into place. With structural steel construction complete, concrete floor pouring is now underway on the residence hall's upper floors. Concrete floors have been poured on the building's lower floors, along which facade weatherproofing has begun. Opening in time for the Fall 2018 semester, UMass Boston's residence hall will also provide the UMass Boston community with a new ground-floor dining hall. Resident amenities will include a TV lounge, a gaming area and a study lounge. The following are photographs from the residence hall topping-off ceremony, courtesy residence hall architect Elkus Manfredi Architects:

100 Federal Street Atrium Addition
- May 18, 2017

100 Federal Street atrium frame construction underway

Steel erection is well underway for the 17,990-square-foot glass-encased atrium addition to the 100 Federal Street office tower in Post Office Square. The addition will soon top off, with primary steel framing elements installed in addition to many secondary steel elements and mechanical platforms. Once steel erection is complete, glazing installation will begin in order to construct the building's glass curtain wall facade overlooking Post Office Square. Upon completion, the new 100 Federal Street atrium will house 8,500 square feet of retail space and 500 square feet of kiosk space, in addition to 8,990 square feet of open garden space. The following are photographs of the 100 Federal Street atrium:

100 Federal Atrium Photos

- Dec 14, 2016

Montaje, Assembly Row’s next luxury apartment community, opening mid-2017

Montaje, 447 luxury residential apartments at Somerville’s Assembly Row, will begin leasing in Spring 2017 in anticipation of a mid-2017 opening. Formerly known as Block 6 at Assembly Row, Montaje’s 20-story tower topped off last month. Exterior and interior finishing are now underway at Montaje in anticipation of leasing.

100 Federal Street Atrium Addition
- Dec 11, 2016

J. Derenzo Companies prepares 100 Federal plaza for new glass atrium

J. Derenzo Companies is at work demolishing the former 100 Federal plaza along Congress Street in Post Office Square to prepare for construction of a glass atrium with retail and a winter garden. Plaza hardscaping has been nearly fully demolished, and construction of the atrium will commence soon. The atrium is anticipated to open in early 2018. The following is a photograph of the atrium construction site:

100 Federal Demolition

UMass Boston Residence Hall 1
- Dec 04, 2016

J. Derenzo Companies breaks ground on first-ever UMass Boston student housing

A groundbreaking ceremony was held last Thursday (December 1st, 2016) for UMass Boston’s first-ever on-campus student housing facility, which will open in Fall 2018. The J. Derenzo Companies team is hard at work performing initial site work to prepare for pre-cast structural pile driving. Following pile driving, the residence hall’s pre-cast concrete foundation will be constructed. The following are photographs of the UMass Boston residence hall site:

UMass Boston Residence Hall 1 Photos

25 Atlantic Avenue Residences
- Nov 30, 2016

J. Derenzo Companies completes demolition for North End’s 25 Atlantic Avenue Residences

J. Derenzo Companies has fully demolished two former one-story brick buildings at 25 Atlantic Avenue in the North End. A new six-unit condominium building, 25 Atlantic Avenue Residences, will be constructed on the site. Derenzo is now at work clearing the site of demolition rubble in order to commence initial site work and foundation construction. The following are photographs of the 25 Atlantic Avenue Residences site:

25 Atlantic Avenue Residences Photographs

- Nov 15, 2016

Block 6 at Assembly Row officially tops off

A topping off ceremony was held Monday (November 14th, 2016) for Block 6 at Assembly Row, a 20-story development with 447 residential apartments and 40,000 square feet of retail opening in Early 2018 in Somerville’s rapidly growing Assembly Row neighborhood. Representatives of the Block 6 development and construction team gathered to sign the 20-story Block 6 tower’s final steel beam then lifted the beam and connected it to the tower’s top floor.

Block 6, along with neighboring Alloy, will bring increased vitality to Assembly Row. “We are honored to play a role in the advancement of one of the region’s most exciting new neighborhoods in collaboration with such valued partners,” said Patrick Callahan, President of Block 6 General Contractor Callahan Construction Managers. Both Block 6 and Alloy are developed by Federal Realty Investment Trust. Upon completion, Assembly Row will include over 600,000 square feet of retail, 1,800 residential units and 2.8 million square feet of office space. The following are photographs from the Block 6 topping off ceremony, courtesy the Block 6 team:

Block 6 Topping Off

Brookline Place Redevelopment
- Nov 11, 2016

Derenzo completes Brookline Place demolition, site work underway

J. Derenzo Companies has fully demolished the former storefront block at Brookline Place and is now performing site work to construct a temporary surface parking lot. The temporary lot will provide parking for the existing One Brookline Place building, which will be retained, while the existing Brookline Place parking garage is demolished and a new garage is built in its’ place as part of the Brookline Place Redevelopment project. Following construction of the new garage, a new eight-story building and a new addition to One Brookline Place will be constructed. The following are photographs of the Brookline Place site:

Brookline Place Photos

- Oct 16, 2016

Block 6 at Assembly Row nears topping off

The 20-story tower at Block 6 at Assembly Row is about to top off. Concrete has been poured on many floors. Exterior finish panels have been installed along a large section of the tower's steel structural frame. Moisture-resistant sheathing and fireproofing are being installed along the adjacent six-story wood-framed structure. A new pre-cast parking garage has been constructed at the project's rear. Block 6 is targeting a January 2018 opening and will contain 447 residential units and 40,000 square feet of retail space. Across from Block 6 is Alloy at Assembly Row, a mixed-use hotel, residential and retail building that is about to top off. The following are photographs of Block 6 at Assembly Row:

View From Wynn Casino Site -

View From Wynn Casino Site

Tweet by Girder-Slab with Aerial View. Alloy at Assembly Row is in foreground, Block 6 is in background -


Low Floor to Floor Heights with Structural Steel. Designed, fabricated and built by you.

— GIRDER-SLAB® (@GirderSlab) October 5, 2016

One Canal
- Jul 26, 2016

Ribbon cut on One Canal in Bulfinch Triangle

We had the honor and privilege of attending the official One Canal ribbon cutting ceremony this past Wednesday, July 13th. We would like to extend huge congratulations and thanks to Aimco and Trinity Financial on this important milestone. The 12-story, 435,000 square foot One Canal will further enliven Bulfinch Triangle with 310 new luxurious residential rental apartments, including 20 affordable units, as well as approximately 21,000 square feet of ground-floor retail space located steps to Downtown Boston, the North End and multiple transportation options. Upcoming retail options at One Canal include Boston’s first City Winery, a specialty culinary and cultural destination opening in early 2017. Apartments at One Canal are now leasing, visit for more information. The following is a link to the official press release announcing the ribbon cutting, and the following are photographs of the ribbon cutting:

Ribbon about to be cut

Ribbon is cut

Massachusetts Governor Charlie Baker and Trinity Financial Vice President & One Canal Project Manager Abby Goldenfarb following ribbon cutting

The following are photographs of the completed One Canal:

View of One Canal from Rose Kennedy Greenway

One Canal rooftop pool

One Canal roof deck

Speakers at the One Canal ribbon cutting ceremony included Aimco Chief Investment Officer John Bezzant, Massachusetts Governor Charlie Baker, Boston Mayor Marty Walsh, Betty Bigwood of the Middlesex Canal Association, Trinity Financial Vice President & One Canal Project Manager Abby Goldenfarb and Aimco Vice President of Operations Jason Kessler. The following are photographs of the speakers:

Aimco Chief Investment Officer John Bezzant

Massachusetts Governor Charlie Baker

Boston Mayor Marty Walsh

Betty Bigwood of the Middlesex Canal Association

Trinity Financial Vice President & One Canal Project Manager Abby Goldenfarb

Aimco Vice President of Operations Jason Kessler

Following speeches and the ceremonial ribbon cutting, guests were given tours of One Canal’s units and amenities. One Canal includes an expansive roof deck featuring a heated pool, an outdoor cinema and a fire pit in addition to 360-degree Boston skyline views. One Canal also includes a 2,000 square foot fitness center and a Canal Club resident lounge. The following are photographs of units and amenities at One Canal:

Open floor plan unit

Unit kitchen

Unit bedroom

Fitness center

Roof deck

Third floor terrace

25 Atlantic Avenue Residences
- Jul 22, 2016

Six new condominiums proposed for North End waterfront

North End Waterfront reports that Richard Walsh, a partner in general contractor Walsh Brothers, proposes to build a five-story residential building containing six new condominiums at 25 Atlantic Avenue along the North End waterfront. Amenities would include a common roof deck and 13 on-site parking spaces. The project's proponent is J3 Design & Development, LLC, an entity managed by Walsh. A rendering of the proposed building is posted above.

Two existing one-story brick buildings at 25 Atlantic Avenue would be demolished to construct the proposed building. 25 Atlantic Avenue is located across from the proposed Lewis Wharf Hotel, a 277-key hotel that would also include 2.5 new acres of public waterfront open space.

Boston Landing
- Jun 16, 2016

New Balance Headquarters earns LEED Platinum resource efficiency certification

New Balance's new headquarters facility at Boston Landing, completed in 2015, has achieved Leadership in Energy and Environmental Design (LEED) Platinum resource efficiency certification. This is the highest attainable efficiency honor awarded by the United States Green Building Council (USGBC). New Balance's facility is the first in the United States and one of only three worldwide to earn all possible points for Indoor Environmental Quality under the USGBC's rating system.

Source: Commercial Property Executive

Tufts University Central Energy Plant
- May 20, 2016

Concrete superstructure completed at Tufts University Central Energy Plant

J. Derenzo Companies is installing utilities at Tufts University’s cutting-edge new Central Energy Plant. The plant’s recently-completed concrete superstructure was built efficiently with PERI Skydeck technology.

J. Derenzo Companies installs utilities

View of PERI Skydeck (yellow beams) in use at concrete superstructure

View of completed concrete superstructure from up hill

View of completed concrete superstructure from Boston Avenue

With completion of the superstructure, installation of the Central Energy Plant’s glass facade, exterior finishes and internal mechanics will commence. The plant will feature efficient boilers and cooling towers to fulfill Tufts University’s energy requirements.

Installation of internal mechanics underway

The Central Energy Plant’s facade facing Boston Avenue will be composed entirely of glass and will expose the mechanics of the plant.

View of future facade from Boston Avenue

View of future facade from across Boston Avenue

More information about the Tufts University Central Energy Plant is posted below.

Boston Landing
- Feb 01, 2016

Impressive progress is being made at Boston Landing, a transformative multi-phased mixed-use development project in Boston's Allston neighborhood. New Balance's recently-opened headquarters building has a striking presence on both Guest Street, the Boston Landing development's main artery, and the parallel Massachusetts Turnpike, with sweeping curves and an overall distinctive design. New Balance's new headquarters opened for business in September 2015. Next door, an under-construction ice rink and 10-story office building are nearing completion. The ice rink will serve as the Boston Bruins' official practice facility.

On our recent visit, the construction team was hard at work putting finishing touches on the ice rink and office building, both of which are expected to be complete by fall 2016. Take a look at our new construction photographs posted above. More project information, including the full Boston Landing development plan, is posted below. Also check out 125 Guest Street, a residential component of Boston Landing currently under review by the Boston Redevelopment Authority.

One Canal
- Jan 10, 2016

Leasing begins at One Canal, building nearing completion

Leasing has begun at One Canal as the building nears completion. Visit for more leasing information. Exterior finishes are just about fully installed, and glass has been installed along One Canal's future ground-floor retail spaces. The construction elevator system is being dismantled, and windows and finishes are being installed in its' place.

View of One Canal from New Chardon Street

Future ground-floor retail

Exterior finishes nearly fully installed

One Canal
- Nov 27, 2015

Exterior finish installation underway at One Canal

Exterior finish installation is well underway at One Canal. Windows are installed throughout, and the red and yellow brick facade is just about complete. Blue fireproofing has been set in place for installation of metal panel finishes along the windows.

View from North End

View from Haymarket Station

View from North Washington Street

View at Canal Street and New Chardon Street

Metal panel installation underway

View from North Washington Street

One Canal
- May 28, 2015

Window and fireproofing installation underway at One Canal

Windows and blue fireproofing are being installed along One Canal's topped-off frame. Purple moisture-resistant cladding has been nearly fully installed. Brick finishes have been installed along the frame fronting Valenti Way.

View from Greenway

Corner of Canal Street and New Chardon Street

Corner of Canal Street and New Chardon Street

View along Valenti Way

Thought Leadership

No new thoughts. Inquire about becoming a thought leader by clicking here


To unlock, this organization must be verified.

Please click here to verify >>