Updated: Mar 22, 2026
Location and Projects
Address
18 Greystone Road, Marblehead, MA, 01945
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5c Energy HVAC/Mechanical Contractor
5c Energy, 18 Greystone Rd, Marblehead, MA (Owned by: Walter Colwell) holds a Home Improvement Contractor license and 1 other license according to the Massachusetts license board.
Their BuildZoom score of 108 ranks in the top 5% of 139,240 Massachusetts licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring 5c Energy, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
5c Energy Contact Information
Phone Number: (617) 240-5234
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Address: 18 Greystone Road, Marblehead, MA 01945
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5c Energy Marblehead
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
5c Energy has a BuildZoom score of 108, which places them above 95% of 139,240 contractors in Massachusetts.
Activity
|
14 projects
|
2025 |
|
48 projects
|
2024 |
|
45 projects
|
2023 |
Our building permit records indicate that 5c Energy has worked on at least
107.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
11 projects
|
Home Additions |
|
37 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that 5c Energy mostly works on
hvac project
and home addition
projects.
Pricing
|
47 projects
|
< $5k |
|
59 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
|
1 project
|
$100k-$250k |
The typical size of their permits is approximately $5,506. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Air sealing remove old batt style fiberglass blown in cellulose for attic floor & garage ceiling t-dome fg for damming vent bathroom fan recessed light enclosures propavents weather strip & sweep for doors
Valuation:
$6,147
Permit #:
RB25-000209
Status:
complete
Fee:
N/A
Permit Type:
Existing building
Building Type:
N/A
Insulation - home air selaing eterior doors weatherstripping and sweeps insulated attic stair cover ridge vent exterior walls cellulose insulation attic floor cellulose crawlspace vapor varrier crawlspace rigid board insulation insulate crawlspace doors with rigid board - please see contract -
Valuation:
$13,130
Permit #:
EX-023772-2023
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulatio - home air sealing insulate hatch with rigid board insulat door with rigid board kneewall rigid boardinsulation transition air sealing damming attic floor fiberglass and celluloseinsulation install soffit vents propavent vent existing bathroom fan - please see contract
Valuation:
$6,031
Permit #:
EX-023995-2023
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation/weatherization - attic damming home air sealing common wall rigid board insulation recessed light covers attic flat cellulose insulation thermadome attic stair cover vent existing bathroom fan ventilation chutes soffit vents ridge vent - please see contract -
Valuation:
$10,143
Permit #:
EX-024812-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - rim joise fiberglass insulation crawlspace wall rigid board insulation home air sealing door sweeps attic floor cellulose insulation insulated attic stair cover damming propavents duct sealing recessed light enclosures kneewall rigid board insulation transition air sealing insulate attic hatch with rigid board - please see contract
Valuation:
$7,065
Permit #:
EX-025100-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - home air sealing attic damming exterior walls cellulose insulation attic flat cellulose insulation attic hatch insulate with rigid board weatherstrip doors ventilation chutes insulated bathroom exhaust bathroom hose - please see contract
Valuation:
$5,363
Permit #:
EX-025202-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - home air sealing weatherstrip door attic damming attic flat cellulose insulation attic flat unfaced fiberglass insulation pull down thermadome isulated attic stair cover common wallrigid board insulatin removal of existing insulation crawlspace rigid board insulation ridge vent - please see contract-
Valuation:
$10,073
Permit #:
EX-025727-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - home air sealing crawlspace rigid board exterior walls cellulose insulation attic hatch insulate with rigid board and weatherstrip roof vents attic flat cellulose insulation sofit vents vent existing bathroom fan soffit vents - please see contract -
Valuation:
$10,383
Permit #:
EX-026204-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - home air sealing addition weatherstripping and door sweeps attic floor fiberglass insulation and cellulose insulation attic slopes fiberglass and cellulose insulation attic hatch rigid board insulation daming temporary access kneewall slopes fiberglass and rigid board insulation transition air sealing exterior walls cellulose insulation - please see contract -
Valuation:
$10,669
Permit #:
EX-027491-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - home air sealing kneewall fiberglass and rigid board insulation crawlspace wall rigid board insulation crawlspace ground cover access door for crawlspace - insulate with rigid board door sweep attic flat fiberglass insulation ventilation chutes vent existing bathroom fans - please see contrac t-
Valuation:
$4,776
Permit #:
EX-023977-2023
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - attic floor cellulose insulation addition propavents damming home air sealing insulate attic hatch vent existing bathroom fans attic floor celulose insulation exterior door insulate with rigid board and weatherstrip - please see contract -
Valuation:
$3,890
Permit #:
EX-026089-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - home air sealing attic damming attic hatch insulate with rigid board and weatherstrip attic flat cellulose insulation remove existing insulation ventil ation chutes insulated exhaust bathroom hose soffit vents - please see contract -
Valuation:
$2,171
Permit #:
EX-024452-2023
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Weatherization - home air sealiing insulate attic and weatherstrip hatch wtih rigid board crawlspace sprayfoam insulation crawlspace ground cover attic flat cellulose insulation vent existing bathroom fan door sweep - please see contract
Valuation:
$7,432
Permit #:
EX-024863-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation - attic damming home air sealing exterior wall cellulose insulation attic flat insulate with rigid board insulation weatherstrip doors ventilation chutes insulated bathroom exhaust hos e- please see contract
Valuation:
$5,363
Permit #:
EX-025203-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation/weatherization - air sealing crawlspace rigid board crawlspace vapor barrier open wall rigid board attic floor cellulose insulation propavents insulated bathroom hose damming - please see contract -
Valuation:
$6,236
Permit #:
EX-023542-2023
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Weatherization - air sealing transitions knewall fiberglass - rigid board removal of existing insulation attic hatch insulate and weatherstrip crawlspace sprayfoam vent existing bathroom fan - please see contract -
Valuation:
$3,754
Permit #:
EX-027934-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation/weatherization - home air sealing attic damming attic flat cellulose insulation pull down thermal tent stair cover ventilation chutes insulated bathroom hose soffit vents - pease see contract -
Valuation:
$3,007
Permit #:
EX-024148-2023
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation/weatherization - air sealing weatherstrip & addition door sweeps attic damming attic flat cellulose insulation attic hatch weatherstrip exteriors walls cellulose insulation basement sills rigid board insulation insulate bulkhead door rigid board crawlspace ground voer crawlspace sprayfoam insulation insulated bathroom hose roof vent - please see contract
Valuation:
$9,906
Permit #:
EX-030385-2024
Status:
complete
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Insulation/weatherization-home air sealing attic damming basement sill fiberglass insulation recessed light covers duct sealing vent existing bathroom fan attic flat cellulose insulation pull down thermadome crawlspace ground cover ventilation chutes - please see contract
Valuation:
$7,901
Permit #:
EBP-24-2
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Weatherization home air sealing crawlspace wall rigid board crawlspace ceiling fiberglass duct sealing weatherstrip and door sweeps removal of existing insulation insulate crawlspace door interior walls cellulose insulation crawlspace ceiling fiberglass insulation crawlspace ground cover crawlspace wall rigid board insulation - please see contract -
Valuation:
$9,743
Permit #:
R-24-0023
Status:
issued
Fee:
$100
Permit Type:
Weatherization
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
5c Energy License info
Verified License
| License # | 194390 |
| Status | Active |
| State | Massachusetts |
| Type | Home Improvement Contractor |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for 5c Energy at the Mass.gov Consumer Affairs and Business Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 42792 |
| Status | Active |
| State | Rhode Island |
| Type | Residential And Commercial Contractor |
- When BuildZoom last verified this license, it had an expiration date of March, 2021. Check the current license status of 5c Energy with the State of Rhode Island Contractors' Registration and Licensing Board
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
387
Permits
- Building permit records show that 5c Energy has worked on 387 permitted projects.
5c Energy Employees
WC
Walter Colwell
Owner
WC
Walter R Colwell