Updated: Jun 28, 2026
Location and Projects
Address
P O BOX 231686, Encinitas, CA, 92023
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Precision Air HVAC/Mechanical Contractor
Precision Air Inc. was formed as a collaborative effort by two seasoned HVAC professionals with over 30 years experience in the trade. With a strong background in the commercial HVAC field our repeat customers, suggested we form our own business. Precision Air Inc. raises the bar in customer service and quality workmanship. It's this simple formula that have made us so successful over the past 30 years. We pride ourselves in being the best at what we do and stand by our work. Every job we do gets our Precision Air Seal of Quality, and the workmanship is always photograph worthy.
We look forwarding to working with you and making new friendships.
Precision Management
From BuildZoom: Precision Air Inc, Encinitas, Po Box 231686, Encinitas, CA (Employees: Ron Mac Arthur and Stephen Robert Diefenderfer) holds a Contractor license and 1 other license according to the Oceanside license board.
Their BuildZoom score of 120 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 Precision Air Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Precision Air Inc Services
Start a project today:
Precision Air Inc Contact Information
Phone Number: (760) 858-8000
Address: P O BOX 231686, Encinitas, CA 92023
Precision Air Inc Encinitas
Quality
120
99th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Precision Air Inc has a BuildZoom score of 120, which places them above 99% of 336,931 contractors in California.
Activity
|
23 projects
|
2025 |
|
35 projects
|
2024 |
|
38 projects
|
2023 |
Our building permit records indicate that Precision Air Inc has worked on at least
96.0 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
|
5 projects
|
Home Additions |
|
92 projects
|
HVAC projects |
|
37 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Precision Air Inc mostly works on
hvac project
and mechanical project
projects.
Pricing
|
14 projects
|
< $5k |
|
22 projects
|
$5k-$20k |
The typical size of their permits is approximately $6,000. 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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Remove and replace 110k btu furnace in the footprint of the old. remove and replace 5 ton air conditioning unit in the footprint of the old. install mini split system reconnect to existing ductwork new electrical. (e-review)
Valuation:
$8,000
Permit #:
CBR2025-0384
Status:
issued
Fee:
N/A
Permit Type:
P/m/e
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-06-25
Cross street: live oak park rd description of work: hvac change out - split system - (online permit) *this project must comply with the current building energy efficiency standards. registered title 24 forms must be provided to the inspector in the field
Valuation:
N/A
Permit #:
PDS2024-RESALT-005010
Status:
issued
Fee:
$337
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-06-25
Cross street: ledgeview ave description of work: hvac change out - split system - (online permit) *this project must comply with the current building energy efficiency standards. registered title 24 forms must be provided to the inspector in the field
Valuation:
N/A
Permit #:
PDS2024-RESALT-005008
Status:
issued
Fee:
$337
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2023-06-08
Cross street: lake san marcos description of work: hvac change out - split system - (online permit) *this project must comply with the current building energy efficiency standards. registered title 24 forms must be provided to the inspector in the field
Valuation:
N/A
Permit #:
PDS2023-RESALT-009315
Status:
issued
Fee:
$310
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2025-04-04
Cross street: trophy dr description of work: new mini split install misc electrical and mechanical for existing single family dwelling
Valuation:
N/A
Permit #:
PDS2025-RESALT-002556
Status:
expired
Fee:
$440
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-09-10
- like kind replacement. - replace 3 ton bryant slim heat pump and indoor air conditioning coil. - reconnect to existing ductwork. - addition new 40 amp circuit
Valuation:
$6,000
Permit #:
MEPR-036991-2025
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-08-16
Cross street:rainbow peaks rd description of work : remove/replace heat pump in the footprint of old connect to exisiting electrical work & ductwork misc mechanical for exisitng single family dwelling
Valuation:
N/A
Permit #:
PDS2024-RESALT-006678
Status:
complete
Fee:
$346
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-02-24
Furnace replacement like for like 75k connect to existing electrical and ductwork single family residence
Valuation:
$2,000
Permit #:
MEPR-034233-2025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-02-18
Like kind replacement 4 zone 3 ton multi-zone heat pump system installation with new electrical
Valuation:
$7,000
Permit #:
MEPR-034655-2025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-02-13
Furnace replacement like for like connect to existing electrical and ductwork single family residence
Valuation:
$4,000
Permit #:
MEPR-034234-2025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-02-12
New furnace new heat pump new air conditioning connect to existing ductwork new electrical
Valuation:
$5,500
Permit #:
MEPR-034409-2025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
-remove and replace furnace in the footprint of the old.-install heat pump (e-review)
Valuation:
$6,000
Permit #:
CBR2024-3354
Status:
issued
Fee:
N/A
Permit Type:
P/m/e
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-11-13
Cross street: via de lavalle description of work: hra (online permit) electric heat pump and/or air conditioner replacement no modifications or alterations to existing system
Valuation:
N/A
Permit #:
PDS2024-RESALT-009577
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-08-27
Cross street: cerveza baja dr description of work: hra (online permit) electric heat pump and/or air conditioner replacement no modifications or alterations to existing system
Valuation:
N/A
Permit #:
PDS2024-RESALT-006996
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-02-12
2 ton condenser like kind replacement connect to existing ductwork and new electrical
Valuation:
$3,000
Permit #:
MEPR-034607-2025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-02-13
Furnace replacement like kind replacement new ductwork connect to existing electrical
Valuation:
$3,000
Permit #:
MEPR-034406-2025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Trade permit for residential alteration & repair - mep mechanical | electrical | plumbing
2025-10-22
Single family residence furnace and heat pump replacement 80k btus 4 tons like for like replacement connect to existing electrical and modify duct work
Valuation:
$10,000
Permit #:
MEPR-033204-2024
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-09-23
Cross street: x description of work: hvac change out - fau or wall heater - (online permit) *this project must comply with the current building energy efficiency standards. registered title 24 forms must be provided to the inspector in the field
Valuation:
N/A
Permit #:
PDS2021-RESALT-011586
Status:
complete
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-07-28
Cross street: x description of work: hvac change out - fau or wall heater - (online permit) *this project must comply with the current building energy efficiency standards. registered title 24 forms must be provided to the inspector in the field
Valuation:
N/A
Permit #:
PDS2021-RESALT-009117
Status:
expired
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2024-07-12
Cross street: x description of work: hvac change out - fau or wall heater - (online permit) *this project must comply with the current building energy efficiency standards. registered title 24 forms must be provided to the inspector in the field
Valuation:
N/A
Permit #:
PDS2021-RESALT-008326
Status:
complete
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Precision Air Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Precision Air Inc License info
Verified License
| License # | 996275 |
| Status | Active |
| City | Oceanside |
| Type | Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Precision Air Inc at the City of Oceanside, CA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 996275 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Precision Air Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
120
BuildZoom Score
Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Security National Insurance Company |
258
Permits
- Building permit records show that Precision Air Inc has worked on 258 permitted projects.
Precision Air Inc Employees
Ron Mac Arthur
Co Owner
Stephen Robert Diefenderfer
Rmo / Ceo / Pres / Co Owner