Updated: Apr 30, 2026
Location and Projects
Address
1768 Broadway, Vallejo, CA, 94589
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A1 Guaranteed Heating & Air Conditioning Inc Photos
A1 Guaranteed Heating & Air Conditioning Inc
A-1 Guaranteed is a family-owned and operated business that serves Solano, Napa, and Contra Costa Counties with Heating and Air Conditioning, Solar, Tankless Water Heaters, Windows, Insulation and/ or Duct Replacement needs. As one of the premier service businesses in the area, we have helped thousands of satisfied, loyal customers improve the energy efficiency of their homes and offices. Our fast and efficient attention to your needs will prove our dedication to our customers is the foundation of our business. Our professional staff is knowledgeable and looks after your best interests when it comes to your environmental comfort needs. We are an Energy Upgrade CA participating contractor. We are honored that our customers consider us #1 in providing trustworthy service and dependable comfort.
From BuildZoom: A1 Guaranteed Heating & Air Conditioning Inc, 1768 Broadway, Vallejo, CA holds a Warm Air Heating, Ventilating And Air Conditioning, General Building, Plumbing license and 1 other license according to the California license board.
Their BuildZoom score of 127 ranks in the top 1% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring A1 Guaranteed Heating & Air Conditioning Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
A1 Guaranteed Heating & Air Conditioning Inc Services
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A1 Guaranteed Heating & Air Conditioning Inc Contact Information
Phone Number: (707) 342-2639
Address: 1768 Broadway, Vallejo, CA 94589
A1 Guaranteed Heating & Air Conditioning Inc Vallejo
Quality
127
99th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
A1 Guaranteed Heating & Air Conditioning Inc has a BuildZoom score of 127, which places them above 99% of 336,931 contractors in California.
Activity
|
217 projects
|
2025 |
|
238 projects
|
2024 |
|
303 projects
|
2023 |
Our building permit records indicate that A1 Guaranteed Heating & Air Conditioning Inc has worked on at least
758.0 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
|
53 projects
|
Home Additions |
|
20 projects
|
New Constructions |
|
639 projects
|
HVAC projects |
|
451 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that A1 Guaranteed Heating & Air Conditioning Inc mostly works on
hvac project
and mechanical project
projects.
Pricing
|
28 projects
|
< $5k |
|
217 projects
|
$5k-$20k |
|
66 projects
|
$20k-$50k |
The typical size of their permits is approximately $14,717. 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.
A1 Guaranteed Heating & Air Conditioning Inc Reviews
5 out of 5 stars, based on
1
review
-
By DavidJune 2, 2017Verified Hire
Building Permits by A1 Guaranteed Heating & Air Conditioning Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace existing ducts with atco premium flex duct system with heavy duty microban infused mylar liner w continuous r-8 insulation blanket and reinforced reflective vapor barrier up to 8 runs in attic or crawlspace w 24 clearance. adding at ducted minisplit in the attic **hers report may be required at final inspection**
Valuation:
$25,730
Permit #:
BIM24-003736
Status:
issued
Fee:
$926
Permit Type:
N/A
Building Type:
N/A
Change-out existing system with ducted minisplit heatpump and airhandler. installing 66 gal electric hybrid heat pump water heater. run 2028 230 v circuit with waterproof disconnect box and whip
Valuation:
$32,800
Permit #:
B2025-03649
Status:
final
Fee:
$1,059
Permit Type:
N/A
Building Type:
N/A
Replace furnace with minsiplit. insulate attic and over ducting with r 44 loose fill fiberglass insulation
Valuation:
N/A
Permit #:
B2024-02704
Status:
approved
Fee:
$242
Permit Type:
N/A
Building Type:
N/A
Replace existing ducts with atco premium flex duct system with heavy duty microban infused mylar liner w continuous r-8 insulation blanket and reinforced reflective vapor barrier up to 8 runs in attic or crawlspace w 24 clearance
Valuation:
$9,790
Permit #:
M-24-3
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove furnace & install two 18, 000 btu ducted minisplits with a 208-230v inverter heat pump. fire zone 2 property
Valuation:
$39,120
Permit #:
B2025-00529
Status:
issued
Fee:
$426
Permit Type:
N/A
Building Type:
N/A
Remove existing furnace install heat pump & air handler. upgrade main service panel to 200 amps & addition new circuit
Valuation:
$32,856
Permit #:
B2025-00404
Status:
issued
Fee:
$818
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$7,340
Permit #:
M-24-11
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install outdoor heat pump minisplit unit with pad. run dedicated 208 230 v circuit to breaker panel replace ducting
Valuation:
$25,000
Permit #:
S25-00529-RES
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
We are adding a ductless system to the customers home with 3 indoor units. we are not taking anything out
Valuation:
$18,270
Permit #:
B2025-01617
Status:
approved
Fee:
$514
Permit Type:
N/A
Building Type:
N/A
Mechanical alteration- main dwelling: installing a ducted minisplit heat pump and air handler & ducts
Valuation:
$32,760
Permit #:
BR25-00057-MCH
Status:
final
Fee:
$883
Permit Type:
N/A
Building Type:
N/A
We are replacing a gas furnace. customer only had a furnace and now he will have the indoor and outdoor ducted minisplit. indoor unit is a replacement but we are adding the outdoor unit. property in fire zone 2
Valuation:
$18,950
Permit #:
B2024-02629
Status:
approved
Fee:
$242
Permit Type:
N/A
Building Type:
N/A
Removing the furnace and adding a ducted minisplit heat pump to the customers home
Valuation:
$29,430
Permit #:
B2025-01578
Status:
plancheck
Fee:
$409
Permit Type:
N/A
Building Type:
N/A
Replacing water heater with heat pump hybrid water heater 55 gal run 230v breaker for hpwh
Valuation:
$9,980
Permit #:
B2025-00623
Status:
issued
Fee:
$629
Permit Type:
N/A
Building Type:
N/A
Bosch ducted minisplit 50 gallon electric hybrid heat pump water heater with panel upgrade
Valuation:
N/A
Permit #:
B2025-00730
Status:
issued
Fee:
$973
Permit Type:
N/A
Building Type:
N/A
Install three headed ducted mini split system. two units cut in to the attic. one unit replacing furnace in crawlspace. replace duct work in crawlspace and install new ductwork in attic more than 25 ft in total
Valuation:
N/A
Permit #:
B2023-03840
Status:
canceled
Fee:
$115
Permit Type:
N/A
Building Type:
N/A
Installing new electric hybrid water heater relocate from shed to the garage
Valuation:
$7,850
Permit #:
B2025-00781
Status:
plancheck
Fee:
$266
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system with a mixed mini split system. one indoor ducted unit three indoor ductless units one outdoor unit. fire zone 2
Valuation:
$30,955
Permit #:
B2023-00787
Status:
issued
Fee:
$405
Permit Type:
N/A
Building Type:
N/A
Replace existing furnace with ducted mini split system. indoor unit in same location as existing furnace. duct replacement more than 25 ft
Valuation:
$32,753
Permit #:
B2023-00300
Status:
issued
Fee:
$369
Permit Type:
N/A
Building Type:
N/A
Install ducted minisplit and airhandler replaced the water heater with a tankless water heater new location outside
Valuation:
$23,036
Permit #:
B2025-02469
Status:
issued
Fee:
$438
Permit Type:
N/A
Building Type:
N/A
Installing ducted mini-split. replacing less than 40ft ducts
Valuation:
$25,566
Permit #:
MP25-0009
Status:
final
Fee:
$416
Permit Type:
Combo new and rep...
Building Type:
N/A
Verified License
BuildZoom confirmed this contractor's license
A1 Guaranteed Heating & Air Conditioning Inc License info
Verified License
| License # | 719381 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, General Building, Plumbing |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for A1 Guaranteed Heating & Air Conditioning 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 # | 719381 |
| Status | Inactive |
| City | Butte County |
| Type | Contractor |
| Business Type | Corporation |
- According to the Butte County, CA, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for A1 Guaranteed Heating & Air Conditioning Inc at the Butte County, CA.
This is a sample of licensing data; click here to access a complete history.
127
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Cypress Insurance Company |
4.4K
Permits
- Building permit records show that A1 Guaranteed Heating & Air Conditioning Inc has worked on 4360 permitted projects.
The previous owner recommended Larry Waters of A-1, Guaranteed. I have since used him twice and can recommend him. In both instances he provided me with an estimate and a completion date which he met without any problems. I would recommend to a friend.