Building permit intelligence · Boston, MA
125 Summer St has 233 municipal building permits on file in Ward 3. The latest recorded activity was a electrical permit dated Jul 2, 2026. Permits at this address represent $25MM+ in total declared construction value. PropertyLabs also identified 2 mapped permits within 500 m of this address.
Electrical
Electrical
Plumbing
Plumbing
Plumbing
Signs
2 mapped permits within 500 m, shown on the intelligence map above.
12 other addresses on Summer St with municipal permit records in Boston.
This address has 233 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 125 Summer St is dated Jul 2, 2026. Municipal records can be corrected or updated after publication.
See the contractors, applicants, permit holders, permit numbers, and project documents associated with 125 Summer St in the PropertyLabs platform, along with alerts when new permits are filed at this address.
Signs
Low Voltage
Low Voltage
Low Voltage
Low Voltage
Low Voltage
Low Voltage
Low Voltage
Fire Alarm
Low Voltage
Fire Alarm
Low Voltage
Fire Alarm
Fire Alarm
Fire Alarm
Low Voltage
Low Voltage
Plumbing
Plumbing
Electrical
Electrical
Plumbing
Plumbing
Electrical
Electrical
Low Voltage
Low Voltage
Low Voltage
Low Voltage
Renovations - Interior NSC
Renovations - Interior NSC
Renovations - Interior NSC
Renovations - Interior NSC
Fast Track Application
Fast Track Application
Fast Track Application
Fast Track Application
Fast Track Application
Fast Track Application
Plumbing
Plumbing
Plumbing
Plumbing
Plumbing
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare, &; Adult Education and Café;Temporary Certificate for Offices - 3rd, 4th, 5th &; 10th Floor,…
Floor 2: Demo existing devices and make safe; add temporary heat detection system to existing fire alarm system.
Installation of plumbing on floors 3 and 10 for a tenant fit out,
installation of low voltage building automation @ 125 Summer St. 2nd Fl Klaviyo
Floor 2: Electrical demo of power and lighting, and make safe; add temp power and lighting. Add (12) temp lights and (4) temp GFCI receptacles.
Installation of composite cabling for card access doors on floors 3 and 10.
Renovation on the 4th Floor of a Multistory Commercial Building.
Replacement of (1) Trane WSHP
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education and CafeCertificate For Office On The 4 Th Floor;ALT-1730127 Issued 06/18/2…
installation of low voltage building automation system @ 125 Summer St. Klaviyo
10th full pulling new cat 6 cables for desk and WAPs
New layout, interior partitions, ceilings and architectural finishes on 2nd floor. New electrical, mechanical, plumbing and fire protection.
Install 2 data cables and relocate 1 data cable
Adding 3 light fixtures and misc power for new offices
Install low voltage cable and system components associated with an AV system upgrade at 125 Summer 3rd Fl for Klaviyo.
Install low voltage cable and system components associated with an AV system upgrade at 125 Summer Street 10th Fl for Klaviyo
Minor select demo of non-bearing interior partition, section of ceilings, flooring, & finishes to adjust layout of lab. Minor rework of existing MEP systems to align with new ceili…
Associated w/ Long Form Application ALT(ALT1769966) interior demolition within (2) smaller office areas.
Connect furniture feeds for 60 stations on the 10th floor
Connect furniture feeds for 259 stations on the 3rd floor
Connect furniture feeds for 159 office stations
running new data drops for the office and wireless needs on the 3rd floor.
Floors 3,5, & 10: Furnish and install 100 fire alarm devices to the existing fire alarm system.
Floors, 3,4,5, & 10: provide electrical fit-out work to include wiring, power, lighting and controls.
Install low voltage cable and system components associated with an AV system upgrade at 125 Summer Street for Klaviyo
Demo of Spaces on Floors 3 & 10 for Klaviyo.
Installation of Plumbing for a tenant fit out on the 4th floor.
Installing new Cat6 and Cat6A cabling for cubes and wireless access points. On the 4th floor, all cables will be terminated in the new closet
installation of low voltage building automation system @ 125 Summer St. Klaviyo Floor 4
demo of all electrical on floors 3,5,10
Plumbing demo for office renovation
Interior tenant fit out of the 3rd and partial 10th floors for Klaviyo with communicating stair on 4th and 5th floor. Approximately 20,000 sq ft. Work to include; new office, commu…
4th FLOOR ONLY: Provide electrical work to include wiring, power, and lighting & controls.
Interior demo of commercial office space ahead of ALT1749405 being issued. Work to include demo of non structural walls and MEP make safe on floors 3, 5 & 10.
4th FLOOR ONLY: add (27) fire alarm devices to the existing fire alarm system.
Demolition to a small section of the 1st Floor at 125 Summer St.
Demo 2 existing access doors and install 2 new access doors on the 20th floor for Analog Devices
Install upright protection after demolition is completed in compliance with NFPA.; All the work was previously done under short form SF1705002.DEMO FOR RENOVATION ONLY
Commercial interior renovation of the 4th floor. Work to include new non structural framing, interior finishes, MEP modifications and modifications to the FP and FA systems to ensu…
17th floor power to modular furniture
Removal and disposal of interior finishes and non-load bearing partitions as noted. Sprinkler heads to be turned up per NFPA compliances (see ALT1704998).
20 Category 6A cables for Wireless Access Points and Cameras. 4 Composite cables for Card access for doors.
Connect Furniture feeds for 106 stations
install 1 kitchen sink on the 4th Flr
Construct temporary construction walls to separate construction from occupied space. New desks & furniture. No modifications to FA or Fire Sprinkler system.
Add 13 Power Poles to existing work stations with 2, 120V, 20amp circuits for each power pole
5th Floor Control Room- Addition of AV Conduit Paths and wiring from control room to AV RM 0515
Replacement of 4 AHU units on the 15th and 16th Floors reusing existing feeders. Installation of 4 new VFD's and disconnects.
Drywall patching to enable Klaviyo to add new A/V speakers and monitors in their atrium. No mechanical, no fire protection, and no fire alarm work.
241212 - For the installation of (30) lights on 13th Fl.
241213 - Installation of (15 ) lights on 14th Fl.
Adding power for future desks/ workstations via floor coring and Poke Through Floor Boxes. Also, Minimal Demo of power and removal of pendant light fixtures.
Office desk relocation, involving relocation of electrical outlets. Electrical work will require permit, to be obtained by electrical subcontractor. No changes to egress, fire alar…
Installation of Access security devices at AIS-AFS Boston 125 Summer St Boston MA 02110 (8-61948-01)
Manufacture / Install new non-illuminated blade sign. [ePlan]
Main Electric room service and test the switchgear
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare, &; Adult Education and Café;Certificate;for Offices - 13th FloorALT1535059 Issued 11/15/2023
Make Safe - Demo (3) Outlets
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education and Café;;Certificate for Offices 16th floorALT1472330 Issued 5/17/2023
Plumbing connections for a retail space.
Install 125amp feeder to EV Cabinet to install 2 dual chargers
Renovate existing space to white box NO sprinkler or fire alarm work - 1st floor
Demo and Whitebox 13th floor
Demo and Whitebox 13th Floor
Plumbing demolition for an office.
Renovation of an existing lab space on level 16. Running new water pipe to plumbing fixtures.
Oxford Properties - 13th Floor -; ;Gut demolition of entire floor, new finishes followed by temp. upright sprinkler heads and new/relocated (12+) fire alarm devices.
Interior office renovation to create new closet and AV control room. Work to include framing of non-structural wall, installation of door, installation of fore flooring base and pa…
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare, &; Adult Education And Café;;Certificate For Offices 17th Floor;ALT1386709 Issued 11/14/2022
installation of low voltage automation system @ 125 Summer St. 16th Fl Oxford
tenant fit up adding speaker strobes , smokes, and relays for shutdown
Plumbing connections for a spec suite on the 16th floor.
Spec suite / tenant fitup . New lights, outlets & fire alarm, existing mechanical and panels.
Oxford Specialty Suite - 16th Floor -; Work includes preparatory demo, new drywall, electrical/Fire alarm, Sprinkler, Mechanical, plumbing and finishesthis will bee done in phases…
Additions to an existing access control system for tenant space on the 17th floor.
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare, &; Adult Education And Café;;Temporary Certificate For Offices 17th Floor Expires 8/2/23; Pen…
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,; Adult Education and CaféCertificate for: RestaurantALT1337127 Issued 7/22/22, A1413151 Issue…
Remove and replace existing membrane roofing system
Install signage for Cava. I non illuminated letters 12.8sf 1 non illuminated blade sign 2.4sf
Installation, termination, and testing of plenum rated category 6 cable for tele/data by RICKTEL Communications, Inc. 617-201-2800
Renovation of an existing space, installing new sanitary waste, potable/ non-potable water, floor drains and a fixture on level 16/17 of 125 summer street.
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare &; Adult Education and CaféCertificate for Office Suite 17th Floor Only.ALT1314007 Issued May…
Telecom: Furnish & Install 44 data locations, reconfigure 30 data locations 125 Summer St, Boston, MA Floors: Floor 17
installation of low voltage automation system 16th, 17th Fl Haemonetics
Tenant fit-out - Fire Alarm
Tenant fit-out lighting and power
Amendment to ALT1337127-Cava tenant fit up. New work to include a PCU Pollution control unit and structural support for the unit. Also some dimensional adjustments per existing con…
Fitout of Cava Restaurant Space
Interior Renovations to the 17th floor
New 120V panel, transformer and disconnect in closet 82 of 125 Summer Street 4th floor.
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education And Café;Certificate For Offices - 21st &; 22nd Floors. -OnlyAlt 1287577 is…
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare, &; Adult Education And CaféCertificate For 4th Floor OfficesALT1294215 Issued 3/4/2022
S22-935 Longfellow Investments Workstations. Installation of the manufacturers electrical interconnections between the added workstations using the provided circuitry.
S22-921 East Coast Office Installations 125 Summer St. 22nd Flr., - "Analog Devices" - Workstation Reconfiguration - * Onsite to furnish and install the electrical interconnections…
Replacement of 2 AHU Units on 12th floor. Reusing existing feeders replacing wiring and disconnecting means/drives.
New tenant upfit for a restaurant
Installing new and relocating existing fire alarm devices in space on the 1st floor. (CAVA)
Fitout of Cava Downtown Crossing Restaurant Space
5 security devices on the 17th floor of 125 Summer St for tenant GenCOM (TK226215)
Tenant fit up for a new restaurant "Cava" in a former "Minigrow" restaurant space.;(Exterior signage by others)
Install card access for 9 doors and install 7 CCTV cameras
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education and CaféCertificate for: Office(s) 9th, 10th &; 11th floors - onlyALT125104…
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education And Café;Certificate For Offices 12th Floor;ALT1290060 Issued 2/7/2022
S22-573 - 125 Summer St. 12th Floor - Oxford Properties - Workstation Electrical Installation of the electrical interconnections between added workstations using provided circuitry
S22-429 KLAVIYO Installation of the electrical interconnections in between the added workstations using the provided circuitry.
Oxford Spec Suite - 17th Floor -; Renovation of a previously demolished Tenant space on the 17th floor. As demolition activities have already been completed; scope consists of new…
Installation of Plumbing for a kitchen sink on the 21st floor and revamp of existing core bathrooms,
installation of low voltage automation system @ 125 Summer St. 17 Th Fl Spec Suite
Furnish and install new pantry sink and faucet, new backwater valve, new backflow preventer, new kitchen sink and faucet, new water heater with expansion tank, leak detection and m…
Install low voltage cable and system components associated with an AV system upgrade at 125 Summer Street for Analog Devices
Job #16164 Oxford Properties 17th Floor Spec Suite Renovation
Install 3 pantry sinks and 2 water heaters
Job #16164 Oxford Properties 17th Floor Spec Suite Renovation including (1) 125A 42 circuit panel.
installation of low voltage automation system @ 125 Summer St. ADI 21st and 22nd Fl
installation of low voltage automation system @ 125 Summer St. Oxford Prop 4th Fl
New fire alarm devices being tied into existing system on the 4th floor of 125 Summer Street.
Electrical Lighting, receptacles, gear for fit out of the 4th floor at 125 Summer Street.
21st, 22nd, and 23rd floor tenant fitout
21st, 22nd, and 23rd Floor tenant fitout
installation of low voltage automation system @ 125 Summer St., 12th Floor
102 telecom drops on the 21st and 22nd floors of 125 Summer St for tenant Analog Devices (JH227135)
Renovation to Analog's 21st & 22nd Floors. Work to include new architectural finishes (millwork, glass, fabric, paint, tile, carpet, drywall partitions, ACT, etc.) & MEP upgrades (…
Removal of select architectural finishes and MEP distribution on 21st Floor. Architectural and MEP layout on 21st & 22nd Floors of Analog Devices office space to include drywall fr…
Installation of Plumbing for a kitchen sink and wellness room sink on the 12th floor,
Oxford Properties - 4th floor Buildout new offices to include video conference rooms, conference rooms, offices, open workspaces, bathroom renovation, wellness rooms, work includes…
Network wiring for Oxford
Oxford Corporate Office - 12th Floor -; ;Office fit-up.; Work includes :; demo of existing space, new drywall, new lighting, ACT, and all new millwork and finishes.;;Modifications…
Tenant fitout with new power and lighting.
Added fire alarm devices for tenant fitout on the 12th floor.
Remove of existing set back roofs and legally dispose of offsite. Install new single ply EPDM roof system with all associated fasteners.
12th floor - prep demo of existing offices layout and begin framing work all buildout under permit ALT 1290060
Removal of interior finishes and MEPs on 22nd Floor. Removal of architectural finishes to include drywall partitions, ACT, flooring, tile, millwork, glass and fabric. Makesafe of p…
Demo & "Make Safe" - drop fixtures and conduit to floor per plans & bring wire back to source; provide temp power and lighting.
Interior demolition of portion of 17th floor. Scope includes removal of interior non-load bearing walls, finishes and MEP make safe of 9,840 SF of space.
Demo /Coil up fire alarm devices on floor 17. (Demo, 17th Floor)
Plumbing demo work at 125 Summer 17th FL
Installation of a new access control system for 9th, 10th, 11th floors
installation of low voltage automation system @ 125 Summer St. Klaviyo Floors 9-11
Floors 9, 10, and 11. New power and lighting for the Klaviyo Office fit out. Add (1) 125A Panelboard and (1) 100A Panelboard on each floor.
Floors 9, 10, and 11. New fire alarm devices for the Klaviyo Office fit out.
to install 2 hand sinks, 5 kit sinks, 2 mop sinks, 3 water heaters , 16 toilets , 16 urinals and 14 lavs on the 9th,10, and 11th floors
Installing new Cat 6 and Cat 6 A for new data / WAP locations for Klaviyo @ 125 Summer st. Floors 9-11
Demo and reinstall of 4th floor AHU Unit.
KLAVIYO - Floors 9, 10 &; 11 -; Tenant fit-out includes a new layout, interior partitions, new ceilings, and all new Architectural finishes on 9th,10th, and 11th.; Modify existing…
A new BDA was installed and Accepted. We are going to remove the existing Fire phones located in the stairwells and elevator lobby. These devices are no longer in use.
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail ,Daycare,&; Adult Education and CaféCertificate for Offices;Floors 5,6, 7 &; Common Areas -OnlyAlt 1049…
Interior demolition of floor slab to add connecting stairs from 9th to 10th floors
Restaurant, garage, office, fitness center, barber shop, coffee shop, Retail ,Daycare,&; adult education and café;Certificate for Offices;Floors 5,6, 7 &; Common Areas (under 49) -…
Begin interior demolition for stairway ahead of ALT permit being issued.
INSTALLATION OF ACCESS CONTROL AND SECURITY EQUIPMENT.
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education and Café;Certificate for: Offices - Suite 1450 -14th floorAlt1171898 - 3/31…
Installing new fire alarm devices in 14th floor tenant space. (Northern Trust)
Install wiring within office cubicles on 14th floor for Northern Trust
OME JOB#20-153 125 Summer St. - Klaviyo Roof Deck. Furnish and install (2) weather proof AV devices.
VESDA Detection for preaction systems
Switchgear Maintenance and Testing
Audio Visual Install
Installation of Plumbing for a kitchen sink on the 14th floor.
Network wiring for Northern Trust on the 19th floor
installation of low voltage automation system - Northern Trust 14th Floor
renovation to the 14th floor for new tenant
Demo including make safe of walls being removed, conduits and wires to floor. Provide temporary lighting and power.Maintain existing panels. TRE101
Interior fit-out on the 14th floor of 125 Summer Street to include: selective demolition, drywall, glazing, flooring, ceiling, and painting. Renovation also includes new MEP (HVAC,…
4th Floor - interior demolition of non structural partitions and associated finishes and MEPS make safe
installation of low voltage automation system @ 125 Summer St. Athletic Center Upgrade
installation of low voltage automation system @ 125 Summer St. Valve Upgrade
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education and Café Certificate for: Office(s) 8th fl. Alt1064507 - 6/25/20
Klaviyo 5th - 7th Floors: Correcting ALT1034391 description. No fitness center was altered, designed, or built. 32,900 SQ.FT. Interior Tenant fit-out of existing offices to include…
Replacing (2) smokes with relays for fire hat recall on 14th & 24th Floor wiring control mods and tie into loop.
Replace 10 pit lighting 10 outlets and light sw and mechanical room lighting outlets and replace 5 disconnects.
14th Floor - Reference SF1145877 for MEP make safe and demo; building interior non load bearing partitions, painting, light fixtures;;;;; E- Plans
Interior demolition of floors 9, 10, and 11 floors. Demolition includes removal of flooring, interior non structural walls, ACT and casework.
Remove existing Waterproof Traffic Topping, followed by floor repairs, column spall repairs, beam spall repairs. Install new Waterproof Traffic Membrane.
OME JOB#21-006 125 Summer St. - 14th Floor Demo. Electrical make safe for the 14th floor, demo by others. Install owner supplied light fixtures.
14th Floor - interior demolition of non load bearing partitions and finishes and MEPS make safe and demolition, turning sprinkler heads upright per NFPA (trade permits will be file…
20-0047-10 Low Voltage Cabling for A/V cabling 8th floor
OME JOB#20-153 125 Summer St. - Klaviyo Roof Deck. Furnish and install lighting, power, and HVAC power per the engineer's drawings.
Construction of a new roof deck at existing roof area on the 6th floor of 125 Summer Street [ePlan]
Replacement of joint sealants and miscellaneous masonry repair to facade.
Restaurant, garage, office, fitness Ctr, barber shop, coffee shop, bank, retail, day care, &; adult education C/O For:;Rest Rooms;-;2nd floor Alt737090 - Issued 9/7/17
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare,&; Adult Education and Café Certificate for: Offices - 3rd fl. Alt1038687 - 1/16/20, A1079981…
Installing new Cat 6 and Cat 6 A to 8th floor @ 125 Summer st Installing new IT closet rack and terminating LV cable
Restaurant, Garage, Office, Fitness Center, Barber Shop, Coffee Shop, Retail, Daycare &; Adult Education and Café Certificate for;Offices,; Amenity,;Café, Library, Fitness Area &;…