Updated: Jul 25, 2026
Location and Projects
Address
2037 IRVING STREET SUITE 213, San Francisco, CA, 94122
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Building Efficiency Plumber
Building Efficiency Inc, 2037 Irving St, San Francisco, CA (Employee: David Keola Hamburger) holds a Renovation license and 5 other licenses according to the Environmental Protection Agency license board.
Their BuildZoom score of 116 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 Building Efficiency Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Building Efficiency Inc Services
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Building Efficiency Inc Contact Information
Phone Number: (415) 831-4535
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Address: 2037 IRVING STREET SUITE 213, San Francisco, CA 94122
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Building Efficiency Inc San Francisco
Quality
116
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Building Efficiency Inc has a BuildZoom score of 116, which places them above 98% of 336,931 contractors in California.
Activity
|
37 projects
|
2025 |
|
31 projects
|
2024 |
|
41 projects
|
2023 |
Our building permit records indicate that Building Efficiency Inc has worked on at least
109.0 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
|
90 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Building Efficiency Inc mostly works on
plumbing project
projects.
Pricing
|
1 project
|
< $5k |
|
7 projects
|
$5k-$20k |
|
18 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
The typical size of their permits is approximately $23,300. 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.
Building Permits by Building Efficiency Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Work category: 1m; provide and install mitsubishi multi split system 5:1 ductless mini splits (one outdoor unit) (1) mxz-5c42na4 mitsubishi multi-zone heat pump outdoor unit 3.6 ton (3) mlz-kp09na2 9 000 btuh ceiling cassette mini-splits (downstairs) (2) mlz-kp12na2-u1 12 000 btuh ceiling cassette ductless mini-splits (upstairs)
Valuation:
N/A
Permit #:
PMW20250403288
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1m; provide and install fujitsu split ducted mini split system. (1) fujitsu single-zone heat pump outdoor unit- aoug24lmas1 - 2.0 ton (1) fujitsu amug24lmas fan coil
Valuation:
N/A
Permit #:
PMW20250113262
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1m; install split heat pump: 25vna4 - infinity variable speed heat pump with greenspeed technology infinity series 17-24 seer variable speed heat pump - 3 ton
Valuation:
N/A
Permit #:
PMW20250224300
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1.) mechanical - provide and install fujitsu split ducted mini split system. this includes (1) one outdoor heat pump and (1) indoor air handler unit 2.) plumbing - provide and install*state** hybrid 80 gal heat pump water heater(hpwh) - 80 gal hpwh thermostatic mixing valve new hot/cold shut off
Valuation:
$35,065
Permit #:
B38486
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Mitsubishi multi-zone heat pump outdoor unit mxz-sm48nam to be installed on the front exterior of the home (to be screened from view from the street)
Valuation:
$34,448
Permit #:
MEP-2025-298308
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1m; provide and install mitsubishi split ducted mini split system. this includes (1) one outdoor heat pump and (1) indoor air handler unit
Valuation:
N/A
Permit #:
PMW20250410455
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1m; 2 systems (1) fujitsu single-zone heat pump outdoor unit- aoug30lmas1 - 2.5 ton (1) fujitsu amug30lmas fan coil (1) mitsubishi *smart multi-zone sm48nam-u1 heat pump outdoor unit - 4 ton (2)msz-ef12naw-u2 12 000 btuh floor console ductless mini-splits (1) svz-kp24na. svz series air handler indoor and new duct-work to connect to dining room kitchen downstairs rooms a... see more
Valuation:
N/A
Permit #:
PMW20240917645
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1m; replace the existing central gas furnace with a new central heat pump system including shower pan (1) mitsubishi single-zone heat pump outdoor unit-suz-ka24na2.th 2 ton (1) mitsubishi svz-kp24na fan coil and replace accessible supply and return duct(s) in attic
Valuation:
N/A
Permit #:
PMW20240826166
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Provide and install (1) sanco? heat pump water heater system details: consists of two parts. the heat pump unit where the hot water is produced using the co2 refrigerant to extract heat from the ambient air and the insulated storage tank 83 gallon the hot water storage
Valuation:
N/A
Permit #:
BLD2024-00467
Status:
expired
Fee:
$239
Permit Type:
N/A
Building Type:
N/A
Replace existing gas furnace with new split ducted heat pump system “for any residential property sound shall not exceed 60 dba during the daytime hours or 50 dba during the nighttime hours at the nearest residential property line."- matt pruter of the city of menlo park planning dept
Valuation:
$23,397
Permit #:
LPC2023-00691
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
This pays for inspections related to original permit # pmw20250722773 filed 7/22/2025. dow: work category: 1p; provide and install hybrid 80-gal heat pump water heater (hpwh) 120-volt
Valuation:
N/A
Permit #:
PW20250723808
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1m; provide and install mini-split heat pump system; consists of (1) outdoor heat pump and (1) indoor air handler
Valuation:
N/A
Permit #:
PMW20250521431
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install new hybrid 80-gal heat pump water heater model #: hpsx80dhpt (in garage) (msp 200a size over current 240v 30a breaker)
Valuation:
$7,850
Permit #:
MEP-2025-298312
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacement of 24000 btu heat pump furnace in same location. replacement of 80 lf of ductwork in same location
Valuation:
$22,915
Permit #:
BLD25-01631
Status:
final
Fee:
$336
Permit Type:
N/A
Building Type:
N/A
This pays for inspections related to original permit # pmw20240826166 filed 8/26/2024. dow: work category: 2pa; state hybrid 80 gal heat pump water heater(hpwh) 80 gal hpwh uef 3.88 model #: hpsx80dhpt
Valuation:
N/A
Permit #:
PW20240826168
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Work category: 1m; provide and install carrier ductless mini split system. this includes (1) one outdoor heat pump and (1) indoor high wall-mounted units
Valuation:
N/A
Permit #:
PMW20250812273
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replacing existing furnace with a split ducted heat pump system resub#1-received 5/23-rotued-6/1-cjs-response to building provided t24 “it is the permittee’s obligation and responsibility to ensure that all work associated with this permit complies with all current orders of the health officer of the county of san mateo related to the novel coronavirus disease 2019 (covid-19). the co... see more
Valuation:
N/A
Permit #:
BLD2022-00594
Status:
final
Fee:
$611
Permit Type:
N/A
Building Type:
N/A
Install 2 mitsubishi mini split multi-zone heat pumps (1) suz-ka36na2.th outdoor unit and (1) mxz-sm48nam2 outdoor unit
Valuation:
$54,069
Permit #:
B42709
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Work category: 1m; install (1) fujitsu single-zone heat pump outdoor unit- aoug24lmas1 - 2 ton
Valuation:
N/A
Permit #:
PMW20250224297
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace existing gas water heater with new 50 gal heat pump water heater in same location in basement. service panel is 200amp and 30a over current protection is being added
Valuation:
$5,950
Permit #:
MEP-2023-287762
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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BZ Score
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Avg Project
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Projects
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BZ Score
$25K
Avg Project
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Projects
142
BZ Score
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Avg Project
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Projects
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Verified License
BuildZoom confirmed this contractor's license
Building Efficiency Inc License info
Verified License
| License # | NAT-116406-3 |
| Status | Active |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Building Efficiency Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 947504 |
| Status | Active |
| State | California |
| Type | General Building, Warm Air Heating, Ventilating And Air Conditioning, Plumbing, Electrical |
| Business Type | Corporation |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Building Efficiency 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 # | A090202 |
| Status | Active |
| Town | Woodside |
| Type | Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of May, 2016. Check the current license status of Building Efficiency Inc with the The Town of Woodside, CA
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-F148235-1 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, 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 Building Efficiency Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 996951 |
| Status | Inactive |
| State | California |
| Type | General Building |
| 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 Building Efficiency 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 # | NAT-116406-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, 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 Building Efficiency Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
116
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
452
Permits
- Building permit records show that Building Efficiency Inc has worked on 452 permitted projects.
Building Efficiency Inc Employees
DH
David Keola Hamburger
Rmo