Updated: Mar 07, 2026
Location and Projects
Address
5621 Lowell St, Oakland, CA, 94608
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Momentum Electrical Contractors Photos
Momentum Electrical Contractors
Momentum Electrical is a full-service electrical contractor serving the San Francisco Bay area, including Sacramento and Santa Rosa. We specialize in quick-turn and design-build commercial tenant improvements, as well as light industrial design-build projects. We can confidently complete projects with electrical scopes of up to $1M. We are highly responsive and can complete smaller projects such as temporary power and emergency service calls.
In additional to our core competency as an electrical contractor, we can also provide complete solutions in specialty sub-trades such as structured cabling, patch panels and data points, fire-life-safety systems, access control, security systems, lighting design, electrical engineering, uninterruptible power supplies (UPS) and stand-by generators.
Momentum is a DVBE / SDVOSB registered company, and can assist you on public works projects requiring set-asides.
Momentum strives to build lasting relationships with clients, and we are fully committed to providing you with excellent value. Please contact us to learn more about how we can help on your next project.
From BuildZoom: Momentum Electrical Contractors, 5621 Lowell St, Oakland, CA (Employee: Thomas Grealis) holds a Electrical, General Building license according to the California license board.
Their BuildZoom score of 114 ranks in the top 2% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Momentum Electrical Contractors, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Momentum Electrical Contractors Services
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Momentum Electrical Contractors Contact Information
Phone Number: (415) 559-3333
Address: 5621 Lowell St, Oakland, CA 94608
Momentum Electrical Contractors Oakland
Quality
114
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Momentum Electrical Contractors has a BuildZoom score of 114, which places them above 98% of 336,931 contractors in California.
Activity
|
22 projects
|
2025 |
|
13 projects
|
2024 |
|
13 projects
|
2023 |
Our building permit records indicate that Momentum Electrical Contractors has worked on at least
48.0 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
|
46 projects
|
Electrical projects |
Analyzing permits over the last 4 years shows that Momentum Electrical Contractors mostly works on
electrical project
projects.
Pricing
|
3 projects
|
< $5k |
|
12 projects
|
$5k-$20k |
|
2 projects
|
$20k-$50k |
|
2 projects
|
$50k-$100k |
|
1 project
|
$100k-$250k |
The typical size of their permits is approximately $9,999. 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.
Momentum Electrical Contractors Reviews
1 out of 5 stars, based on
1
review
-
May 15, 2018House remodel$20,000
Building Permits by Momentum Electrical Contractors
This is a sample of this contractor's permits. Click here to access their complete permit history.
This is a historic theater renovation with added and upgraded electrical distribution lighting and power systems a/v systems theatrical lighting theatric rigging and technology systems. fire alarm will be a separate permit and contractor
Valuation:
N/A
Permit #:
EW202503144939
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Move electrical meter from nonconforming location on entry staircase to front of house: *siemens #: mc2442b1200esv*. *3/0 copper for 200amp service single meter*
Valuation:
$2,000
Permit #:
EW25-0225
Status:
issued
Fee:
$1,002
Permit Type:
N/A
Building Type:
N/A
Remove/replace 8 pendant light fixtures. install 5 new pendant light fixtures. install 5 new 20a/120v circuits via surface mounted emt conduit for convenience outlets. install 1 new 60a/240v circuit with 60a/240v fusible disconnect for appliance. install 5 new relocate 6 20a/120v convenience receptacles install 1 new 30a/240v disconnect safety switch at roof via existing surface mount... see more
Valuation:
N/A
Permit #:
EW202401045982
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installation of electrical distribution wiring and devices for multistory residential building. (1) 600 amp service (6) 100amp feeder 5 panelboard/switchboard. 400 lights 130 switches 250 receptacles 10 fans 5 d/w 5 microwave 5 ranges 28 s/d
Valuation:
N/A
Permit #:
E202306267707
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
- install (1) new 400a 208/120v 3phase indoor subpanel with new feeder from msb approx. 40ft. - install (4) new 50a 220v circuits from new 400a subpanel to various locations within 40ft of subpanel for ev chargers
Valuation:
N/A
Permit #:
EW202312135702
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacement of 25-meter electrical service
Valuation:
$75,000
Permit #:
PREBLD25-0394
Status:
triage
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Single service panel ugrade for units 1-4. like-for-like 200-amp main service replacement. located at se corner of building facing n idaho st
Valuation:
$9,999
Permit #:
MEP-2024-294813
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical service upgrade for building 460 same locations to 200a service a single service drop feeding 200a disconnects. upgraded panel will feed all units in building
Valuation:
$10,000
Permit #:
MEP-2022-285780
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Electrical service upgrade for building 448 same locations to 200a service a single service drop feeding 200a disconnects. upgraded panel will feed all units in building
Valuation:
$10,000
Permit #:
MEP-2022-285778
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Service panel ugrade for units 1-4. install 400-amp main service replacement for (e) 200a panel. located nw corner of building facing n humboldt st
Valuation:
$9,999
Permit #:
MEP-2024-294817
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single service panel ugrade for units 1-4. like-for-like 200-amp main service replacement. located nw corner of building facing pkg lot
Valuation:
$9,999
Permit #:
MEP-2024-294815
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single service panel upgrade for units 1-4. like-for-like 200-amp main service replacement. located nw corner of building facing pkg lot
Valuation:
$9,999
Permit #:
MEP-2024-294812
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing 400-amp service with new 400-amp service. relocate (1) panel board (a) to electrical room. update grounding with new per code
Valuation:
N/A
Permit #:
EW202402126663
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
200a like for like main electrical service replacement
Valuation:
N/A
Permit #:
BL-ELER-2025-00034
Status:
issued
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
200a like for like main electrical service replacement
Valuation:
N/A
Permit #:
BL-ELER-2025-00033
Status:
issued
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
200a like for like main electrical service replacement
Valuation:
N/A
Permit #:
BL-ELER-2025-00032
Status:
issued
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
200a like for like main electrical service replacement
Valuation:
N/A
Permit #:
BL-ELER-2025-00031
Status:
issued
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
Like for like 200a main electrical service replacement
Valuation:
N/A
Permit #:
BL-ELER-2025-00025
Status:
issued
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
Like for like 200a main electrical service replacement for units 1-5
Valuation:
$0
Permit #:
BL-ELER-2025-00024
Status:
issued
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
Like for like 200a main electrical service replacement for units 6-11 plus the house meter
Valuation:
$0
Permit #:
BL-ELER-2025-00023
Status:
issued
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
Hiring a contractor?
Verified License
BuildZoom confirmed this contractor's license
Momentum Electrical Contractors License info
Verified License
| License # | 998076 |
| Status | Active |
| State | California |
| Type | Electrical, General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Momentum Electrical Contractors at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
114
BuildZoom Score
Bonded
| Bonded Agent | Great American Insurance Company |
| Bond Value | $12,500 |
Insured
| Workers Comp Provider | Everest National Insurance Company |
109
Permits
- Building permit records show that Momentum Electrical Contractors has worked on 109 permitted projects.
Momentum Electrical Contractors Employees
TG
Thomas Grealis
Sole Owner
Nightmare in every way.
Our simple remodel, which involved picture lighting being installed, water heater and basic outlets installed, adding some basic can lighting and under cabinet lighting. Nothing too complicated or odd.
Under the supervision of a foreman with a serious drug problem, who due to human kindness shall remain nameless, Momentum's team pulled existing wiring our of our walls, removed existing outlets without rhyme or reason, removed wall switches, phone lines and cable connections.
Although drywall and ceilings were removed FOR MONTHS, the wiring often wasn't installed until after the walls and ceiling went in. Almost every day we would walk into our home and find holes in the walls and ceilings as the various teams under various "foremen" tried to figure out what had happened before them.
In the end, Thomas Gellis, the owner, sat in our parlor, told us he would finish the job without further charge ( due to our "pain and suffering" ...his words) and send an independent electrician from another company to hook up and explain the complicated new remote system and return when the house was finished to complete the installation.
He also agreed to reimburse us for an outside second opinion to assure that the work was safe and assist in deciphering what fixtures and outlets were connected where.
The independent guy came and was supposed to come back when the house was in order. We now have light switches taped with masking tape to our walls.
After jerry rigging the job together we heaved a sigh of relief and contacted Thomas to coordinate the independent coming back. We needed him to sign a release of lien and looked forward to ending the nightmare.
It was then that he called and told us he was demanding more money and was going to put a lien on or home. We were stunned. He claimed he didn't remember what he said. He acknowledged that we had been misled by Nathan.
No amount of good faith on our part, patience and understanding was returned. In the end, he acted the victim.
Anyone involved in issues regarding the Nathan and Momentum please contact us. We will share emails and photos and need the same.
We are shattered and broken by this nightmare.