Building permit intelligence · Boston, MA
90 Blossom St has 199 municipal building permits on file in Ward 3. The latest recorded activity was a electrical permit dated May 11, 2026. Permits at this address represent $25MM+ in total declared construction value. PropertyLabs also identified 1 mapped permit within 500 m of this address.
Electrical
Electrical
Fire Alarm
Fire Alarm
Fire Alarm
Low Voltage
1 mapped permit within 500 m, shown on the intelligence map above.
7 other addresses on Blossom St with municipal permit records in Boston.
This address has 199 permit records in PropertyLabs' public history and is located in Ward 3. The city figures below provide context without changing the focus of this exact-address record.
City coverage counts address-linked rows and does not add overlapping canonical tables. Rolling windows are inclusive, use UTC boundaries, and end Aug 1, 2026.
PropertyLabs compiled this permit history from municipal public records for Boston, MA. The latest recorded permit activity at 90 Blossom St is dated May 11, 2026. Municipal records can be corrected or updated after publication.
See the contractors, applicants, permit holders, permit numbers, and project documents associated with 90 Blossom St in the PropertyLabs platform, along with alerts when new permits are filed at this address.
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Low Voltage
Low Voltage
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Plumbing
Electrical
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Electrical
Install new Siemens Medical Imaging equipment. Work includes associated mechanical and architectural work within these rooms with very minor work in the hallway entering the rooms.…
Fast Track Application
Renovations - Interior NSC
Low Voltage
Renovations - Interior NSC
Fire Alarm
Addition of music speakers to the MGH EP Lab within the waiting room. This speaker system is linked to the fire alarm via a new module and will turn off under fire alarm condition.
Electrical
Fire Alarm
Low Voltage
Electrical
Fire Alarm
Refurbishment of existing CT room on 2nd floor of Gray building. Lighting, power and raceways for CT machine. (2) 120/208V 225A (2) 120/208V 100A 42 circuit panelboards
Fire Alarm
Replacement of cooling towers serving existing gray bldg chiller. E24074 MGH Gray Cooling Tower Phase 1
Low Voltage
Low Voltage
Low Voltage
Low Voltage
Renovations - Interior NSC
Low Voltage
Low Voltage
Demolition - Interior
renovation of office on the second floor Gray Building. Receptacles and lighting
Replacement of cooling towers serving the existing gray building chiller plant.Structural engineer required to perform on site visits.
Fast Track Application
Renovations - Interior NSC
Fast Track Application
Plumbing
Small renovation of Gray Building 10th floor Reverse Osmosis equip room. New power requirements.
Small renovation of Gray Building 10th floor locker and restroom room. Lighting, power
Small renovation of Gray Building 10th floor Reverse Osmosis Water room. Lighting, power and mech equipment. (1) 120/208V 100A panelboard
Fire Alarm
Fire Alarm
Plumbing
MGH Gray 10 Dialysis Water Systems. Misc. Low Voltage HVAC Control Wiring. FK - 242609
Renovation of existing lab/patient care spaces with new fixtures and piping. (414400)
Renovation of a portion of the Gray/Bigelow Building 10th floor at Massachusetts General Hospital. Spaces include 2,000 sf of dialysis treatment space. Work includes demolition of…
Selective demo of existing plumbing systems (ie RO loop, clean outs, and hot&cold domestic water). Installation of new exam sink, water closet, emergency shower, lavatory toilet an…
Installation of sanitary piping that serves existing roof drains. (885656-1)
MGH GRB 6 Sedation Rm 24-0054-10
HospitalTemporary Certificate for MGH Gray Building - 1st Floor Staff Lounge &; Storage, Adding Phase 2 Gray Building 1st floor Procedure Room 1-5, Staff Work Station, Common Area,…
Renovation of existing space. Demo out old fixtures. Install new piping and fixtures. (885646-1)
Add new lighting and power for the sedation room.
MGH Gray 2 IR Reno. Misc. Low Voltage HVAC Control Wiring. FK - 231611
HospitalCertificate for: Common Areas floors 1-9ALT669747 Issued 2/6/17
Install new Duct Smoke Detector
Install new Duct Smoke Detector
replacement of an existing medical air riser in Gray/Bigelow building from sub-basement to 6th floor
Re-piping of medical gas lines with new control panels. Drywall cutting and patching as required
Separation of medical air equipment feeds. Equipment connection for exhaust fans
Removal & replacement of architectural finishes. Replace existing fuel oil lines to upgrade fuel oil system. The majority of alterations to the existing MEP . A SF permit has been…
150183JCC - MGH Fuel Oil renovation- Bigelow building. Furnish and install (1) new circuit to power (3) leak detector. Demo & Relocate of existing PLC panel.
150183JCC - MGH Fuel Oil renovation- Gray roof. Furnish and install power to (1) leak detector feed Oil filter control panel
150183JCC - MGH Fuel Oil renovation- Gray 15th floor. Furnish and install power to (1) leak detector
150183JCC - MGH Fuel Oil renovation- Gray basement. Furnish and install power to (1) leak detector
Replace existing ductwork above the ceiling in the lobby. Support work will include replacement of the acoustical ceilings, replacing light fixtures, and moving sprinkler heads.
New Chiller for Gray Building Penthouse
1 pipe run from sub-basement & 1 pipe run from 1st floor to 6th floor to alarm panels. MGH Gray
Job# 22-0070-10 Low voltage cabling for T/D -MGH-GRB 8 Potts Conf.
Install fire alarm module in Conference Room, 856, for interface with music/speaker system power controller. Device will be tied into existing local fire alarm addressable loop. Co…
Replacement of an old shaft wall that was demolished during abatement. Architectural finishes include drywall and acoustical ceilings
Minor architectural and electrical renovation to the Potts Conference Room located on the 8th Floor of the Gray/Bigelow Building on the Mass General Hospital campus. Existing floor…
150187TUR - MGH Gray Bigelow 8 Potts Conference Room. Furnish install lighting and power.
MGH Gray/Bigelow/Jackson HVAC Seperation -90 Blossom Street Misc. Low Voltage HVAC Control Wiring - FGK - 220340
150165TUR - MGH Gray 1 EP Lab. Furnish and install Nurse call for phase 3 @ 90 Blossom Street, 02114
150165TUR - MGH Gray EP Lab. Furnish and install lighting, power, for phase 2 @ 90 Blossom Street, 02114
150165TUR - MGH Gray 1 EP Lab. Furnish and install lighting, power, for phase 4 @ 90 Blossom Street, 02114
150165TUR - MGH Gray 1 EP Lab. Furnish and install fire alarm and for phase 3 @ 90 Blossom Street, 02114
150165TUR - MGH Gray 1 EP Lab. Furnish and install lighting, power, for phase 3 @ 90 Blossom Street, 02114
150165TUR - MGH Gray 1 EP Lab. Furnish and install fire alarm for phase 4 @ 90 Blossom Street, 02114
150165TUR - MGH Gray EP Lab. Furnish and install Nurse call for phase 2 @ 90 Blossom Street, 02114
150165TUR - MGH Gray 1 EP Lab. Furnish and install Nurse call: (1) EM station for phase 4 @ 90 Blossom Street, 02114
150165TUR - MGH Gray EP Lab. Furnish and install fire alarm for phase 2 @ 90 Blossom Street, 02114
HospitalCertificate for Gray/Bigelow;Building 3rd Floor OR Department.ALT900453 Issued December 4, 2018
414400 - Demo and re-routing of existing pipe only.
MGH Gray Chiller 4 Replacement. 90 Blossom St. Misc. Low Voltage HVAC Control Wiring - FGK- 220083
MGH Gray EP Lab. Misc. Low Voltage HVAC Control Wiring - FK - 219928
MGH GBJ Generator Enabling. Misc. low voltage, control wiring - FK - 219885
414400 Renovation of Lobby space, adding temporary new kitchenette for staff .
Installation of new chiller pump, VFD and associated piping and wiring. Relocation of existing tie feeder disconnect.
150165TUR - MGH Gray 1 EP Lab. Furnish and install lighting, power for phase 1.
150165TUR - MGH Gray 1 EP Lab. Furnish and install fire alarm for phase 1.
414400 - Renovation of existing lab/patient care spaces with new fixtures and piping.
Gray Building Penthouse Temporary Heat Detectors for Chiller Project
New Chiller for Gray Building Penthouse
Mass General Hospital - Gray Bldg - 1st Floor -; Renovations to EP Lab.; Work includes complete demo and build out of (5) new Procedure Rooms, Pre-op Holding Bays, Staff Workstatio…
Renovation existing EP Lab Waiting Room into a temporary Staff Lounge with Storage Rooms. Demo of MEPs and architecturals. New HVAC fan coils within space. New flooring, ceiling, a…
MGH Gray Stairwell DP's, 90 Blossom St. Misc. low Voltage HVAC Control Wiring - FK - 219329
MGH Gray Bigelow Building - 8th Floor; -; Interior Renovation to existing IDF Closets.;;Scope of work includes installing a new Fan Coil Unit to accommodate heat loads, Fire Alarm,…
SM#150120GGC - MGH Gray/Bigelow IDF Closets.IDF Closets on 8th floor- Furnish & Install Fire alarm smokes in IDF closets from local circuits.
SM#150120GGC - MGH Gray/Bigelow IDF Closets.IDF Closets on 8th floor- Furnish & Install lighting
Ceiling tile removal and select GWB wall opening in the Gray Building 1st Floor Family Waiting Area at MGH for the purpose of identifying existing conditions above the ACT ceiling…
400100 - MGH GBJ Generator Enabling DEMO and relocation of existing plumbing in Penthouse of Jackson Building. Cut and tie-in new floor drain on Level 15.
Job#19-0496-10 MGH Pathology Reno Low Voltage T/D Cabling
SMC# 150117FAC - Level B1Pathology Renovation. One Security Door.
SMC# 150117FAC - Level B1Pathology Renovation. Demo of existing space with remodel. Install of new light fixtures and power.
The scope includes renovations of the existing space on the basement level. Selective Demolition of existing interior spaces for new finished interior spaces. Renovated areas to in…
GRB Pathology Project - Remove and replace one sink per engineered drawings.
Hospital Certificate for the Mass General Hospital/Gray Bigelow Building - 12th Floor ALT798824 issued: 3/29/18
Gray Bigelow Building: 6th Floor Mechanical/HVAC Renovation. Demo and relocate (2) VFD's. Extend and relocate wiring loads to (4) motors/fans on the 6th floor. Addition/upgrade/rel…
Gray Bigelow Building: 6th Floor Mechanical/HVAC Renovation, Demo and relocate (2) VFD's. Extend and relocate wiring loads to (4) motors/fans on the 6th floor
GRB Building:Fifth Floor IDF Closet, minor renovation-added FCU unit, (1) 4ft strip fixture and switch
Installing plumbing fixtures with associated piping
Hospital Certificate for Offices 11th.fl.-Only Alt 797822 issued 2/22/18
Renovation of the existing 3rd floor OR's of the MGH White Building. This is Phase 3 of 3 phases on the MGH Legacy OR Project. The scope of work includes furnish and installation o…
Renovation of the existing 3rd floor OR's of the MGH White Building. This is Phase 3 of 3 phases for the MGH Legacy OR Project. The scope of work includes tel/data and security con…
Renovation of the existing 3rd floor OR area in the White Building at MGH. This is the Phase 3 of 3 phases for this MGH Legacy OR Project. The scope includes furnish and installati…
Mass General Hospital -;;Gray / Bigelow;Building - 3rd Floor -; Renovation of existing;Legacy OR Department. New partitions, doors, flooring, MEP &; FP systems.; Installation of ne…
Furnish and installation of security, tel/data and audio video raceway and boxes for new renovation of the Gray Bigelow 12th floor project. Furnish and installation of raceways, bo…
Furnish and installation of lighting and power receptacles and associated raceway and wiring for the Gray Bigelow 12th floor project.
Furnish and installation of new Notifier fire alarm devices, boxes and associated raceway and wiring for the Gray Bigelow 12th Floor Project. The new devices will be tied into the…
Furnish & install receptacles for relocation of existing receptacles for temporary equipment
2nd floor Pathology - Funish & install of receptacles, lighting and panel-boards in laboratory testing like area. (4) 120/208V 100A (2) 480/277V 100A (1) 480/277V 150A 480/277V 150…
2nd floor Pathology - furnish and install (50 total security raceways and wiring to headend
2nd floor Pathology- install of smokes speakers, strobes and duct smokes
Renovation of lab.
Minor renovation of existing clinical pathology laboratories including walls, ceilings, floors and finish carpentry cabinets and counters on the second floor of the Gray/Jackson bu…
MGH Gray/Bigelow IDF Closets, Misc Low Voltage HVAC Control Wiring - FGK, 185749
Mass General Hospital - Gray Bigelow Building - 12th Floor Phase 2 -; Renovation of existing Hospital patient rooms and 11th floor under slab plumbing work. Work consists of: demol…
MGH Gray/White Urology, Misc low voltage HVAC control wiring - FGK, 185703
MASS GENERAL HOSPITAL 90 BLOSSOM STREET LOW VOLTAGE TEL/DATA CABLING ON THE 12TH FLOORJOB NUMBER 18-0065-10
380100 - MGH Gray Bigelow 12 - Renovation of existing patient care floor. New patient bays with medical outlets and sinks. New bathrooms.
884511 - MGH Pharmacy - Two sinks
MGH Hospital:Interior Renovations to the eleventh floor per drawings and specifications by e4H Architects and RDK Engineers consisting of new finishes and MEP upgrades for new Urol…
MGH Gray Bigelow 12 ED, Misc Low Voltage HVAC Control Wiring - JAG, 185567
Furnish & install (20 new 100A panel boards for upgrade and renovation of existing offices on GRB 11th fl. (20 42ckt 100A 208V panelboards
Furnish & install (20 new 100A panel boards for upgrade and renovation of existing offices on GRB 11th fl. (20 42ckt 100A 208V panelboards
Furnish & install (20 new 100A panel boards for upgrade and renovation of existing offices on GRB 11th fl. (20 42ckt 100A 208V panelboards
Renovation of existing Lactation Room 1202 and Corridor 1200C02. Furnish and installation of conduit and wiring for receptacles and power equipment feeds. Furnish and installation…
Renovation of existing Lactation Room 1202 and Corridor 1200C01. Provide conduit stubs for (4) tel/data outlets and (1) TV. Provide conduit stub for (1) card reader
Renovation of existing Lactation Room 1202 and Corridor 1200C02. Furnish and installation of (2) duct smoke detectors, (2) control modules, and (2) remote test stations and associa…
Demo and renovation of Mothers room on the 12th floor of the Gray/Bigelow building, some MEP in corridor just outside room.
Installing plumbing fixtures & associated piping at MGH
Gray Bigelow Building: 9th fl Mechanical/ HVAC Renovation. Addition/upgrade/relocate of existing Mechanical equipment on the 9th fl
Gray Building: 4th fl Mechanical/HVAC renovation. Addition/ upgrade/ relocate of existing Mechanical equipment on 4th fl
Hospital Certificate for the;offices and work rooms on the 8th floor of the Gray Bigelow/MGH; ALT685270 issued: 4/3/17
Gray Building: 14th fl Mechanical/HVAC renovation. Addition/ upgrade/ relocate of existing Mechanical equipment on 14th fl
Gray Building: 10th fl Mechanical/HVAC renovation. Addition/ upgrade/ relocate of existing Mechanical equipment on 10th fl
Gray Building: Basement Mechanical/HVAC renovation. Addition/ upgrade/ relocate of existing Mechanical equipment on Basement
Gray Building: 7th fl Mechanical/HVAC renovation. Addition/ upgrade/ relocate of existing Mechanical equipment on 7th fl
Gray Building: 5th fl Mechanical/HVAC renovation. Addition/ upgrade/ relocate of existing Mechanical equipment on 5th fl
Interior Renovation to IT closets to accommodate new heat loads as required for the new computer and phone systems. Work includes HVAC and electrical work. No structural work.
New Fire Alarm System
Hospital Certificate for the MGH Pharmacy (Basement of the;Gray-Bigelow Building) ALT664532 issued: 1/18/17
Repair of cinder block wall hit by car
Renovation of the cancer administration space.
Abatement to lead paint, steel patches added to cooling tower structure, and painting.
Renovation of an existing area
Renovation to an existing area, relocation of (1) notification device(Grey Bigelow 8)
MGH Hospital. Interior renovations to a portion of the 5th floor including demolition of existing finishes and installation of new finishes and supporting Mechanical,electrical and…
MGH Gray Core Lab, Misc. Low Voltage HVAC Control Wiring - FGK, 174827
MGH- Graycore labs renovation. Relocate of outlets and fixtures (1) 3ph/4W Panelboard
Furnish & install power for relocations of existing equipment. Panel-boards 120/208V 3PH/4W
Furnish & install power for relocations of existing equipment
Furnish & install raceways for security
Furnish & install FA devices and wiring
Mass General Hospital -; The contractor will oversee bulk Oxygen cylinder back up systems for specific areas within Mass General Hospital. This includes Critical Care areas in the…
MGH Gray/Bigelow 8 Renovations, Misc. Low Voltage HVAC Control Wiring - JAG, 174548
Minor architectural remodeling including; Painting Walls, Patching Floors and installing new Millwork Cabinetry; and light HVAC Duct and Electrical Upgrades
Construction of new Fire Alarm Closets
Renovation of several offices and work rooms on the 8th floor of the Gray Bigelow building at Mass General Hospital
MGH Gray/Bigelow Bulk Oxygen, Misc. Low Voltage HVAC Control Wiring - FGK, 174431
MGH Pharmacy Phase - 4, Misc. Low Voltage HVAC Control Wiring - 174255
Fire alarm upgrade throughout Gray/Bigelow building. fire alarms to be replaced throughout the building with new devices. ; see also ALT669751;; same set of plans
Renovation of an existing space. (MGH;Grey Bldg. Pharmacy Phase 4 basement)
Installation of notification devices in the basement of MGH Grey Bldg.
MGH - Gray-Bigelow Building - Basement -; Interior demolition and renovation of building for new Offices and Administrative spaces and addition of Pharmacy carousel.; In conjunctio…
MGH Bulk/Oxygen - Grey/ Bigelow. ( 4) Med Gas Panels
MGH Bulk/ Oxygen - Grey Bigelow. ( 4) Med Gas Panels
MGH Gray Legacy OR, Misc. Low Voltage HVAC Control Wiring - FGK, 163657
MGH Gray Fire Alarm Upgrade, Misc. Low Voltage Control Wiring - FK, 164017
We will be doing a lighting retrofit throughout the building.
MGH Gray Bigelow Lighting Replacements, retrofit existing LIGHT FIXTURES - 452 - AP, 163851
MGH 9th fl Gray Aii Room Renovation ( 18) Nurse Call Devices @ 90 Blossom St