Updated: Feb 18, 2026
Location and Projects
Address
P O BOX 9122, Alta Loma, CA, 91701
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SI Rosati Air Conditioning
SI Rosati Air Conditioning, Alta, Po Box 9122, Alta Loma, CA (Employees: Jeffrey Andrew Rosati and Stephen Ignace Rosati) holds a Warm Air Heating, Ventilating And Air Conditioning license according to the California license board.
Their BuildZoom score of 96 ranks in the top 20% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring SI Rosati Air Conditioning, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
SI Rosati Air Conditioning Contact Information
Phone Number: (909) 987-7000
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Address: P O BOX 9122, Alta Loma, CA 91701
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Building Permits by SI Rosati Air Conditioning
This is a sample of this contractor's permits. Click here to access their complete permit history.
Change out (2) rooftop package units*like for like*no additi
Valuation:
N/A
Permit #:
B1701072
Status:
final
Fee:
$475
Permit Type:
Mmech
Building Type:
N/A
Residential reroof house & garage. remove comparable roof and install 1/2 radient barrier plywood 1 layer 30# felt and gaf lifetime 3-dimensional composition shingles. shall comply to cool roof standards
Valuation:
$6,800
Permit #:
B15-000-994
Status:
issued
Fee:
$283
Permit Type:
R-3 residence 1-2...
Building Type:
N/A
Change out (1) air conditioning * (1) fau unit (same location) * ***requi
Valuation:
N/A
Permit #:
B0506998
Status:
issued
Fee:
$140
Permit Type:
Combo
Building Type:
N/A
Serra mesa cp: base zone co-1-2. building permit for interior ti for existing medical office bldg (no chg in use/no added sf) for proposed construction for demo/new partition walls, new reflected ceiling, electrical, mechanical and new plumbing. features: transit/census tk 87.02. tenant in 120 is orthopaedics; tenant in 140 is quest lab. nssq 129334 with corrections
Valuation:
$0
Permit #:
343413
Status:
Completed
Fee:
N/A
Permit Type:
N/A
Building Type:
Add/Alt Tenant Im...
Change out hvac equipment furnace coil condenser
Valuation:
N/A
Permit #:
PMT2015-02963
Status:
final
Fee:
$203
Permit Type:
N/A
Building Type:
N/A
Install roof mounted hvac unit (to be field verified)
Valuation:
N/A
Permit #:
B201901951
Status:
final
Fee:
$114
Permit Type:
N/A
Building Type:
N/A
Replace 3 hvac units - 1.5 ton
Valuation:
$18,675
Permit #:
15-4299
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Replace 2 hvac units - 1.5 ton
Valuation:
$12,450
Permit #:
15-4301
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Replace 2 hvac units - 1.5 ton
Valuation:
$12,450
Permit #:
15-4300
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Replace hvac unit - 1.5 ton
Valuation:
$6,225
Permit #:
15-4303
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Replace hvac unit - 1.5 ton
Valuation:
$6,225
Permit #:
15-4302
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Replace hvac unit - 1.5 ton
Valuation:
$6,225
Permit #:
15-4298
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Changeout (2) 1-1/2 hvac split system
Valuation:
$5,200
Permit #:
14-3990
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Changeout 1-1/2 hvac split system
Valuation:
$2,600
Permit #:
14-3992
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Changeout 1-1/2 hvac split system
Valuation:
$2,600
Permit #:
14-3991
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Changeout 1-1/2 hvac split system
Valuation:
$2,600
Permit #:
14-3989
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
Replace heater new air conditioning unit run conduit for air conditioning new breaker
Valuation:
N/A
Permit #:
PMT2005-06311
Status:
final
Fee:
$201
Permit Type:
N/A
Building Type:
N/A
Permitted work in suite 140 removed from bulding permit approval. work only to include that permitted in suite 120. 2,200 sq.ft. credited 19 fu's/nssq 132138
Valuation:
$0
Permit #:
432757
Status:
Issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Hvac change-out (same location)
Valuation:
N/A
Permit #:
PMT2013-02334
Status:
final
Fee:
$199
Permit Type:
N/A
Building Type:
N/A
Hvac changeout 4 ton
Valuation:
$7,663
Permit #:
15-2352
Status:
final
Fee:
N/A
Permit Type:
Comb
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
SI Rosati Air Conditioning License info
Verified License
| License # | 371026 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for SI Rosati Air Conditioning at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Bonded
| Bonded Agent | Suretec Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
26
Permits
- Building permit records show that SI Rosati Air Conditioning has worked on 26 permitted projects.
SI Rosati Air Conditioning Employees
JR
Jeffrey Andrew Rosati
Sole Owner
SR
Stephen Ignace Rosati
Sole Owner