Updated: Mar 18, 2026
Location and Projects
Address
9 Pequot Court, Mashpee, MA, 02649
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William Mahoney Construction
William Mahoney, 9 Pequot Ct, Mashpee, MA (Employees: William D Mahoney and William J Mahoney) holds a Home Improvement Contractor license and 1 other license according to the Massachusetts license board.
Their BuildZoom score of 90 indicates that they are licensed or registered but we do not have additional information about them.
Their license was verified as active when we last checked. If you are thinking of hiring William Mahoney, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
William Mahoney Services
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William Mahoney Contact Information
Phone Number: (508) 292-9842
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Address: 9 Pequot Court, Mashpee, MA 02649
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Electrical renovation of fluoroscopy suite room st-0425 on the fourth floor of the stoneman building. work includes electrical demolish installation of new 225 kva ups and power installation electrical raceways of lighting outlets and fire alarm
Valuation:
$317,280
Permit #:
E1043796
Status:
filed
Fee:
$46
Permit Type:
N/A
Building Type:
Commercial
Renovation of electrical risers in the fegan building. refeed exhaust fans and pumps on the 12th floor. work includes new electrical panels transformers power feeds lighting and power
Valuation:
$643,450
Permit #:
E1041630
Status:
filed
Fee:
$39
Permit Type:
N/A
Building Type:
Commercial
Install electrical power to replace 2 future air handling units. work includes installing a 112.5 kva and 45 kva transformer panels and electrical feeders from the basement to the roof
Valuation:
$195,450
Permit #:
E1041527
Status:
filed
Fee:
$22
Permit Type:
N/A
Building Type:
Commercial
Replacement of farley fa-1 ahu. install 3 smoke detectors a fire smoke damper a duct smoke detector 2 pull stations and 3 av units in the new ahu. tie into existing fire alarm loop for the floor
Valuation:
$12,000
Permit #:
EFA1041536
Status:
filed
Fee:
$140
Permit Type:
N/A
Building Type:
Commercial
Electrical renovation of the reisman building 9th floor nicu. work is with alt957521 and in 5 phases. work includes installing new fire alarm devices testing tie-in to existing fire alarm loops on the floor and removal of old devices
Valuation:
$35,000
Permit #:
EFA964045
Status:
complete
Fee:
$1,120
Permit Type:
N/A
Building Type:
Commercial
Replacement of bader ba-1 ahu. install 2 smoke detectors a fire smoke damper a duct smoke detector 1 pull station and 2 av units in the new ahu. tie into existing fire alarm loop for the floor
Valuation:
$12,000
Permit #:
EFA1041537
Status:
filed
Fee:
$140
Permit Type:
N/A
Building Type:
Commercial
Install 2 smoke detectors and 2 remote alarm indicators for new electric closets on the 7th and sub-basement floors. tie into existing fire alarm loops on their respective floors
Valuation:
$7,000
Permit #:
EFA1041634
Status:
filed
Fee:
$90
Permit Type:
N/A
Building Type:
Commercial
Electrical renovation of the farley sub-basement medical offices. work includes electrical demolish new lighting receptacles and fire alarm
Valuation:
$75,000
Permit #:
E1065052
Status:
complete
Fee:
$60
Permit Type:
N/A
Building Type:
Commercial
Renovation of the pavilion sub-basement for medical offices. install 3 new stobe only devices and 2 new speaker strobe devices. tie into existing fire alarm loop on the floor
Valuation:
$8,000
Permit #:
EFA1063414
Status:
complete
Fee:
$100
Permit Type:
N/A
Building Type:
Commercial
Renovation of the farley sub-basement for medical offices. install 3 new stobe only devices and 2 new speaker strobe devices. tie into existing fire alarm loop on the floor
Valuation:
$8,000
Permit #:
EFA1065055
Status:
filed
Fee:
$100
Permit Type:
N/A
Building Type:
Commercial
Replacement of air handling unit on the bader building roof. work includes new 30 kva transformer panels lighting and fire alarm
Valuation:
$92,370
Permit #:
E1041533
Status:
filed
Fee:
$31
Permit Type:
N/A
Building Type:
Commercial
Renovation of air handling unit 921 on the transfer floor of the enders building. work includes installation of new 45 kva transformer disconnect switch and 3 harmonic filters to provide power to the air handling unit
Valuation:
$30,000
Permit #:
E956184
Status:
filed
Fee:
$25
Permit Type:
N/A
Building Type:
Commercial
Electrical renovation of the pavilion building sub-basement of medical offices. work includes electrical demolish new lighting receptacles and fire alarm
Valuation:
$30,000
Permit #:
E1063412
Status:
complete
Fee:
$68
Permit Type:
N/A
Building Type:
Commercial
Replacement of air handling unit on the farley building roof. work includes new 30 kva transformer panels lighting and fire alarm
Valuation:
$78,475
Permit #:
E1041532
Status:
filed
Fee:
$34
Permit Type:
N/A
Building Type:
Commercial
Electrical renovation of offices on the second floor of the hunnewell building. work includes selective electrical demolish installation of fixtures and installation of new power
Valuation:
$65,000
Permit #:
E967134
Status:
complete
Fee:
$122
Permit Type:
N/A
Building Type:
Commercial
Install power for a temporary disinfectant trailer at bidmc near the loading dock. feed is a 30a 3 phase feed coming from a temporary outside 100a panel
Valuation:
$5,000
Permit #:
E1067271
Status:
filed
Fee:
$70
Permit Type:
N/A
Building Type:
Commercial
Renovation of the feldberg basement project 3 area. work includes electrical demolish of lighting and power and installation of new light fixtures and power receptacles
Valuation:
$48,000
Permit #:
E931447
Status:
complete
Fee:
$110
Permit Type:
N/A
Building Type:
Commercial
Install new smoke detector and remote alarm indicator for an electric room on the fourth floor of the stoneman building for the st-0425 project
Valuation:
$2,500
Permit #:
EFA1043799
Status:
filed
Fee:
$50
Permit Type:
N/A
Building Type:
Commercial
Turn over room fd-b26 after ceiling reconstruction. demolish temp heat loop temp pull station and temp av. reinstall 2 smoke detectors originally in the space before construction began
Valuation:
$6,000
Permit #:
EFA993932
Status:
complete
Fee:
$80
Permit Type:
N/A
Building Type:
Commercial
Renovation of enders building first floor rooms 101 102 103 104 105 & 106. work includes electrical demolish new lighting power and tel data for the space
Valuation:
$49,600
Permit #:
E1034581
Status:
complete
Fee:
$88
Permit Type:
N/A
Building Type:
Commercial
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Verified License
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William Mahoney License info
Verified License
| License # | 169550 |
| Status | Active |
| State | Massachusetts |
| Type | Home Improvement Contractor |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for William Mahoney at the Mass.gov Consumer Affairs and Business Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 000029136 |
| Status | Inactive |
| City | Newton |
| Type | Electrical Contractor |
- According to the City of Newton Massachusetts, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for William Mahoney at the City of Newton Massachusetts.
This is a sample of licensing data; click here to access a complete history.
90
BuildZoom Score
49
Permits
- Building permit records show that William Mahoney has worked on 49 permitted projects.
William Mahoney Employees
WM
William D Mahoney
Responsible Person
WM
William J Mahoney
Owner
WM
William Mahoney
Owner