Updated: Mar 01, 2026
Location and Projects
Address
42622 7TH STREET E, Lancaster, CA, 93535
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Advanced Conservation Systems Construction
Advanced Conservation Systems Inc, 42622-7 Th St E, Lancaster, CA (Employees: James Thomas Buxton, John William Shonk, and Kathryn Louise Rominger) holds a Insulation And Acoustical, General Building, Solar license and 3 other licenses according to the California license board.
Their BuildZoom score of 103 ranks in the top 10% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Advanced Conservation Systems Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Advanced Conservation Systems Inc Services
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Advanced Conservation Systems Inc Contact Information
Phone Number: (415) 994-3736
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Address: 42622 7TH STREET E, Lancaster, CA 93535
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Advanced Conservation Systems Inc Lancaster
Quality
103
90th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Advanced Conservation Systems Inc has a BuildZoom score of 103, which places them above 90% of 336,931 contractors in California.
Activity
|
44 projects
|
2025 |
|
36 projects
|
2024 |
|
36 projects
|
2023 |
Our building permit records indicate that Advanced Conservation Systems Inc has worked on at least
116.0 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
|
21 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that Advanced Conservation Systems Inc mostly works on
home addition
projects.
Pricing
|
2 projects
|
< $5k |
|
4 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
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.
Building Permits by Advanced Conservation Systems Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Re-roof with class a or b roof covering material weighing less than 6 pounds per sq. ft. over existing solid sheathing 38 squares. class a roof covering is required within very high fire hazard severity zone (vhfhsz). for residential roof replacement > 50% of the total roof area apply cool roof product labeled and certified by cool roof rating council (crrc). cool roof may be required... see more
Valuation:
$7,600
Permit #:
25016-90000-03637
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Completing main panel upgrade in same location to 200 amps. adding 3 new branch circuits to new main service panel. removing existing gas water heater and replacing with new 65g gallon heat pump water heater. removing existing gas central hvac system with new 4-5ton heat pump split central hvac system
Valuation:
N/A
Permit #:
PMT25-02959
Status:
issued
Fee:
$388
Permit Type:
N/A
Building Type:
N/A
Remove existing flat-tile roof and replace with tesla solar roof 15.696 kw photovoltaic array. electrical installation of powerwall 3s and any other additional equipment necessary to be done by tesla direct on a separate permit
Valuation:
N/A
Permit #:
PMT25-02845
Status:
final
Fee:
$201
Permit Type:
N/A
Building Type:
N/A
40442 dunes reroof and removal re-installation of (13) photovoltaic panels * whole roof replacement with removal and reinstallation of 13 existing photovoltaic panels. solar racking to be replaced with new solar racking equipment: ironridge xr100 rails ufo clamps tile hook flashings unirac tile hooks grounding lugs and micro inverter attachments for xr100 rails. replace tiles along th... see more
Valuation:
N/A
Permit #:
RES25-00282
Status:
issued
Fee:
$2,032
Permit Type:
N/A
Building Type:
N/A
Solar permit (commercial ground mount ess 400lbs or higher or adding to existing system)
2025-09-09
40442 dunes remove and reinstall panels after roof repair
Valuation:
N/A
Permit #:
BSOL25-00301
Status:
canceled
Fee:
$453
Permit Type:
N/A
Building Type:
N/A
Main panel upgrade (oh) to 200a in new location per sce meter spot. dc/rc is scheduled for 5/15 @ 7:30 am. adding new branch circuit to main service panel for ev charger and new branch circuit for mini split. in conjunction with mechanical permit to be pulled separately. wmp req'd smoke and carbon monoxide form due at final
Valuation:
N/A
Permit #:
2025-950
Status:
issued
Fee:
$245
Permit Type:
N/A
Building Type:
N/A
Installation of roof-mounted microinverter/ac module solar photovoltaic (pv) system interconnected to an air conditioning coupled energy storage system (ess) with a combined air conditioning wattage rating (ess + pv) not to exceed 38.4kw in a 1 or 2 family dwelling
Valuation:
N/A
Permit #:
24041-90000-51061
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Replace existing 40g gas water heater in exterior closet with new 50g electric heat pump water heater in same location. adding branch circuit to existing main service panel
Valuation:
N/A
Permit #:
K202501234
Status:
final
Fee:
$34
Permit Type:
N/A
Building Type:
N/A
Solar permit (commercial ground mount ess 400lbs or higher or adding to existing system)
2025-03-06
36859 windtree circle | addition on standalone 3.160 kw dc solar electricity system roof mounted w tesla backup switch meter collar & tesla powerwall 3 battery
Valuation:
N/A
Permit #:
BSOL25-00079
Status:
issued
Fee:
$451
Permit Type:
N/A
Building Type:
N/A
Re-roof with class a or b roof covering material weighing less than 6 pounds per sq. ft. over existing solid sheathing 28 squares. class a roof covering is required within very high fire hazard severity zone (vhfhsz). for residential roof replacement > 50% of the total roof area apply cool roof product labeled and certified by cool roof rating council (crrc). cool roof may be required... see more
Valuation:
$5,600
Permit #:
24016-90000-01570
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Re-roof with class a or b roof covering material weighing less than 6 pounds per sq. ft. over existing solid sheathing 28 squares. class a roof covering is required within very high fire hazard severity zone (vhfhsz). for residential roof replacement > 50% of the total roof area apply cool roof product labeled and certified by cool roof rating council (crrc). cool roof may be required... see more
Valuation:
$5,600
Permit #:
24016-90000-09322
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Installation of roof-mounted microinverter/ac module solar photovoltaic (pv) system interconnected to an air conditioning coupled energy storage system (ess) with a combined air conditioning wattage rating (ess + pv) not to exceed 38.4kw in a 1 or 2 family dwelling
Valuation:
N/A
Permit #:
24041-90000-51064
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Installation of roof-mounted microinverter/ac module solar photovoltaic (pv) system interconnected to an air conditioning coupled energy storage system (ess) with a combined air conditioning wattage rating (ess + pv) not to exceed 38.4kw in a 1 or 2 family dwelling
Valuation:
N/A
Permit #:
24041-90000-51114
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Installation of roof-mounted microinverter/ac module solar photovoltaic (pv) system interconnected to an air conditioning coupled energy storage system (ess) with a combined air conditioning wattage rating (ess + pv) not to exceed 38.4kw in a 1 or 2 family dwelling
Valuation:
N/A
Permit #:
24041-90000-51113
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Installation of roof-mounted microinverter/ac module solar photovoltaic (pv) system interconnected to an air conditioning coupled energy storage system (ess) with a combined air conditioning wattage rating (ess + pv) not to exceed 38.4kw in a 1 or 2 family dwelling
Valuation:
N/A
Permit #:
24041-90000-49965
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Installation of roof-mounted microinverter/ac module solar photovoltaic (pv) system interconnected to an air conditioning coupled energy storage system (ess) with a combined air conditioning wattage rating (ess + pv) not to exceed 38.4kw in a 1 or 2 family dwelling
Valuation:
N/A
Permit #:
24041-90000-49689
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
[eplan] [pv3] installation of a 144.18kwdc/129.33kwac photovoltaic system with 324 modules and 4 central inverters connected to a 800a msp
Valuation:
N/A
Permit #:
24041-10000-49272
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Installation of roof-mounted microinverter/ac module solar photovoltaic (pv) system interconnected to an air conditioning coupled energy storage system (ess) with a combined air conditioning wattage rating (ess + pv) not to exceed 38.4kw in a 1 or 2 family dwelling
Valuation:
N/A
Permit #:
24041-90000-49648
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to #18041-90000-33867 to change the address from10430 w penrose st to 10430 w penrose st unit b. no change in legal. transfer of permit from best solar power inc license #988425 to advanced conservation systems inc license #508902
Valuation:
N/A
Permit #:
18041-20001-33867
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 30a branch circuit for new 65g electric heatpump water heater. water heater is located in attached garage. replace existing 50g gas water heater with new 65g electric heatpump water heater located in attached garage. wmp req'd smoke and carbon monoxide ltr due at final
Valuation:
N/A
Permit #:
2024-1195
Status:
final
Fee:
$305
Permit Type:
N/A
Building Type:
N/A
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Advanced Conservation Systems Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Advanced Conservation Systems Inc License info
Verified License
| License # | 508902 |
| Status | Active |
| State | California |
| Type | Insulation And Acoustical, General Building, Solar |
| Business Type | Corporation |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Advanced Conservation Systems Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 105121 |
| Status | Active |
| City | South San Francisco |
| Type | Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of June, 2012. Check the current license status of Advanced Conservation Systems Inc with the The City of South San Francisco, CA
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 439025 |
| Status | Inactive |
| State | California |
| Type | General Building, Insulation And Acoustical, Waterproofing & Weatherproofing |
| Business Type | Corporation |
- According to the California Contractors State License Board, 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 Advanced Conservation Systems Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 915083 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, General Building, Electrical |
| Business Type | Corporation |
- According to the California Contractors State License Board, 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 Advanced Conservation Systems Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
103
BuildZoom Score
Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Benchmark Insurance Company |
425
Permits
- Building permit records show that Advanced Conservation Systems Inc has worked on 425 permitted projects.
Advanced Conservation Systems Inc Employees
JB
James Thomas Buxton
Rmo/Ceo/Pres
JS
John William Shonk
General Partner
KR
Kathryn Louise Rominger
Officer
MN
Michael Phong Nguyen
Rmo / Ceo / Pres
SJ
Stephen Michael Jenkins
Rmo/Ceo/Pres