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Plumbing • Heating • Air
BY THE BOOK
Fix it once. Fix it right. By The Book.
Upfront pricing, fast scheduling, and lasting repairs you can count on.
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Top-Rated Plumbing & HVAC Services in Southern California, CA
By The Book Plumbing • Heating • Air Conditioning proudly serves San Diego and Temecula, CA, with trusted plumbing, heating, and air conditioning services backed by years of local expertise. Our licensed plumbers and HVAC technicians handle everything from emergency plumbing repair and leak detection to furnace installation, AC repair, and routine maintenance—all with upfront pricing and dependable service.
By The Book Plumbing • Heating • Air Conditioning was founded in 2021 by Maryna and Leon with one mission: to deliver honest, reliable plumbing and HVAC services to San Diego, Temecula, and nearby communities. Starting with a small crew and a single truck, they built the company on integrity, fair pricing, and the belief that every job should be done “by the book.” Their hands-on approach and commitment to quality quickly earned the trust of local families, helping the business grow one job at a time.
Today, By The Book is trusted across Southern California for expert plumbing, heating, and air conditioning services. From drain cleaning and water heater replacements to furnace repairs and AC installations, their licensed team provides dependable solutions with care and precision. Maryna and Leon remain dedicated to the same values they started with: treating every customer like a neighbor and keeping homes safe and comfortable year-round.
Our Story
Customer Reviews
See Why Homeowners Trust us For Plumbing and HVAC service
4.9
74 Reviews
A+
4.9
28 Reviews
66 Reviews
4.9
66 Reviews
4.9
Victor Hammond
2025-10-08
If you want honest service with zero pressure, this is the company to call. They didn’t try to upsell me or push unnecessary repairs. Just straightforward help and great results. I’ll be referring them to friends and family for sure.
manuel burgess
2025-09-25
Geramiah and Cain replaced my shower valve today and they killed it! Great customer service, friendly guys and the shower works perfectly!
Rina Dee
2025-09-13
Had a mini emergency with our bathtub stopper Saturday morning. Jeremiah came to fix our issue, and there was no "overtime fee" that some plumbers have during the weekend. He was very nice and transparent with what work had to be done and the cost of replacing the stopper. He also gave us some tips on maintaining our bathroom. Hes an honest man and would recommend him for any plumbing issues!
Ryan V
2025-09-05
Service was quick and great. Jeremiah showed up on time and got right to work. The repair was simple and done expertly! Thanks Jeremiah!
Mitchell J.
2025-08-04
Cleared kitchen sink blockage in minutes when other companies wanted to replace pipes. Honest diagnostics win!
Customer Reviews
See Why Homeowners Trust us For Plumbing and HVAC service
4.9
74 Reviews
A+
4.9
28 Reviews
66 Reviews
4.9
66 Reviews
4.9
Victor Hammond
2025-10-08
If you want honest service with zero pressure, this is the company to call. They didn’t try to upsell me or push unnecessary repairs. Just straightforward help and great results. I’ll be referring them to friends and family for sure.
manuel burgess
2025-09-25
Geramiah and Cain replaced my shower valve today and they killed it! Great customer service, friendly guys and the shower works perfectly!
Rina Dee
2025-09-13
Had a mini emergency with our bathtub stopper Saturday morning. Jeremiah came to fix our issue, and there was no "overtime fee" that some plumbers have during the weekend. He was very nice and transparent with what work had to be done and the cost of replacing the stopper. He also gave us some tips on maintaining our bathroom. Hes an honest man and would recommend him for any plumbing issues!
Ryan V
2025-09-05
Service was quick and great. Jeremiah showed up on time and got right to work. The repair was simple and done expertly! Thanks Jeremiah!
Mitchell J.
2025-08-04
Cleared kitchen sink blockage in minutes when other companies wanted to replace pipes. Honest diagnostics win!
Customer Reviews
See Why Homeowners & Businesses Trust us For Plumbing and HVAC service.
4.9
66 Reviews
A+
4.9
28 Reviews
Victor Hammond
2025-10-08
If you want honest service with zero pressure, this is the company to call. They didn’t try to upsell me or push unnecessary repairs. Just straightforward help and great results. I’ll be referring them to friends and family for sure.
manuel burgess
2025-09-25
Geramiah and Cain replaced my shower valve today and they killed it! Great customer service, friendly guys and the shower works perfectly!
Rina Dee
2025-09-13
Had a mini emergency with our bathtub stopper Saturday morning. Jeremiah came to fix our issue, and there was no "overtime fee" that some plumbers have during the weekend. He was very nice and transparent with what work had to be done and the cost of replacing the stopper. He also gave us some tips on maintaining our bathroom. Hes an honest man and would recommend him for any plumbing issues!
Ryan V
2025-09-05
Service was quick and great. Jeremiah showed up on time and got right to work. The repair was simple and done expertly! Thanks Jeremiah!
Mitchell J.
2025-08-04
Cleared kitchen sink blockage in minutes when other companies wanted to replace pipes. Honest diagnostics win!
4.9
66 Reviews
Customer Reviews
See Why Homeowners Trust us For Plumbing and HVAC service
4.9
74 Reviews
A+
4.9
28 Reviews
66 Reviews
4.9
66 Reviews
4.9
Victor Hammond
2025-10-08
If you want honest service with zero pressure, this is the company to call. They didn’t try to upsell me or push unnecessary repairs. Just straightforward help and great results. I’ll be referring them to friends and family for sure.
manuel burgess
2025-09-25
Geramiah and Cain replaced my shower valve today and they killed it! Great customer service, friendly guys and the shower works perfectly!
Rina Dee
2025-09-13
Had a mini emergency with our bathtub stopper Saturday morning. Jeremiah came to fix our issue, and there was no "overtime fee" that some plumbers have during the weekend. He was very nice and transparent with what work had to be done and the cost of replacing the stopper. He also gave us some tips on maintaining our bathroom. Hes an honest man and would recommend him for any plumbing issues!
Ryan V
2025-09-05
Service was quick and great. Jeremiah showed up on time and got right to work. The repair was simple and done expertly! Thanks Jeremiah!
Mitchell J.
2025-08-04
Cleared kitchen sink blockage in minutes when other companies wanted to replace pipes. Honest diagnostics win!
Service Area
Get Help From the Best Plumbers in San Diego, CA
Our team proudly serves homeowners across San Diego County and Temecula, delivering fast response times, upfront pricing, and work that’s done right the first time. From emergency plumbing and water heater repairs to heating and air conditioning service, we handle it all with honesty, efficiency, and expert workmanship — keeping your home comfortable and worry-free year-round.
We're the hero in your story
Same-day service and lasting results
done right the first time
Company & Contact
Phone: (866) 298-4326
Email: Service@bythebookpha.com
Address: 9528 Miramar Rd, Suite #4, San Diego, CA 92126
Plumbing License: 1078955 C-36
HVAC License: C20
We're the hero in your story
Same-day service and lasting results
done right the first time
Company & Contact
Phone: (866) 298-4326
Email: Service@bythebookpha.com
Address: 9528 Miramar Rd, Suite #4, San Diego, CA 92126
Plumbing License: 1078955 C-36
HVAC License: C20
We're the hero in your story
Same-day service and lasting results
done right the first time
Company & Contact
Phone: (866) 298-4326
Email: Service@bythebookpha.com
Address: 9528 Miramar Rd, Suite #4, San Diego, CA 92126
Plumbing License: 1078955 C-36
HVAC License: C20